Hilly and mountainous area high standard farmland irrigation and drinking water integrated water intake structure and method

Abstract

This invention discloses an integrated water intake structure for high-standard farmland irrigation and drinking water in hilly and mountainous areas. It includes a reverse filter, an integrated irrigation and drinking water collection corridor, a hollow overflow dam, and a flexible stilling basin, connected sequentially in the direction of water flow. The integrated irrigation and drinking water collection corridor includes an irrigation collection corridor, with its bottom end connected to a sedimentation and desilting corridor. The downstream sidewall of the irrigation collection corridor connects to a domestic water storage chamber. The sidewall of the irrigation collection corridor has both an inlet and an irrigation channel intake, while the domestic water storage chamber has a domestic water intake. This invention optimizes the collection corridor structure to achieve graded water filtration, simultaneously meeting the needs of irrigation and domestic water use, and allowing for adjustment of the collected water volume as needed. Combined with the reverse filter, hollow overflow dam, and flexible stilling basin, it achieves separation of clear and turbid water, safe water intake, and flood discharge and energy dissipation, improving project stability and service life, and reducing operation and maintenance costs.

Description

Technical Field

[0001] This invention belongs to the field of farmland irrigation and rural drinking water technology, and relates to an integrated water intake structure for high-standard farmland irrigation and drinking water in hilly and mountainous areas. This invention also relates to an integrated water intake method for high-standard farmland irrigation and drinking water in hilly and mountainous areas. Background Technology

[0002] As of 2023, China had built 1 billion mu (approximately 66.7 million hectares) of high-standard farmland (related standards are outlined in the "General Rules for the Construction of High-Standard Farmland"). However, there is still a considerable gap to be bridged to the target of 1.35 billion mu (approximately 153 million hectares), and the remaining areas to be developed are mostly hilly and mountainous regions with relatively poor natural conditions. Poor water resources are one of the important reasons restricting the development of high-standard farmland in hilly and mountainous areas. This is mainly reflected in the complex terrain of gullies, high sediment content, strong destructiveness of seasonal floods, and the conflict between drinking water and irrigation water, which seriously threatens the lives of people and agricultural production in hilly and mountainous areas.

[0003] Traditional water intake structures for high-standard farmland construction and drinking water channels in hilly and mountainous areas are often independent due to varying water quality and quantity requirements. This results in large land areas, high costs, and significant impacts on the ecological environment of the channels. Currently, there are few domestic examples of integrated irrigation and drinking water intake structures. Therefore, it is essential to develop integrated irrigation and drinking water intake structures. Channel water sources are the most suitable water sources for high-standard farmland and drinking water in hilly and mountainous areas, playing a crucial role in these areas. Traditional water intake in hilly and mountainous areas often involves constructing overflow dams within the channels to block the riverbed and raise the water level, followed by installing debris barriers at the intake to prevent most bedload from entering the next water purification process. However, the flow and water level of gullies in hilly and mountainous areas fluctuate greatly throughout the year. During the flood season, the flow increases sharply, often carrying large amounts of bedload, suspended sediment, and floating debris, which severely erodes the retaining dams and affects the safe operation of the water intake structure. Furthermore, siltation easily accumulates in front of the dam and at the water intake, significantly impacting the lifespan of water purification materials. Regular cleaning and replacement of these materials are necessary, making operation and maintenance cumbersome and costly. During the dry season, the flow decreases drastically, making water intake difficult. Moreover, if the riverbed is blocked, downstream flow may cease, affecting the ecological water demand downstream of the gully.

[0004] Water intake corridors are an improvement on the traditional overflow dam-barrier system used for water intake in hilly and mountainous gullies. They involve setting up a collection and infiltration corridor in front of the overflow dam to achieve water collection, siltation reduction, and erosion prevention. However, due to differences in irrigation and drinking water quality standards and water level requirements, existing water intake corridors have simple structures that struggle to achieve integrated irrigation and drinking water systems, automatic silt removal, and automatic water storage volume adjustment. This results in large land occupation, high costs, poor filtration efficiency, substandard water quality, and poor application effectiveness. Therefore, considering the characteristics of water sources in hilly and mountainous gullies and the shortcomings of existing water intake facilities, there is an urgent need to develop a water intake structure that requires less land, has lower engineering costs, better silt removal performance, higher filtration efficiency, and integrates irrigation and drinking water systems. Summary of the Invention

[0005] The first objective of this invention is to provide a high-standard farmland irrigation and drinking water integrated water intake structure for hilly and mountainous areas, which solves the problems of large land occupation of ditches in hilly and mountainous areas, substandard drinking water quality, high engineering costs, and cumbersome dredging operations in the prior art.

[0006] The second objective of this invention is to provide a method for integrating high-standard farmland irrigation and drinking water intake in hilly and mountainous areas.

[0007] The first technical solution adopted in this invention is an integrated water intake structure for high-standard farmland irrigation and drinking water in hilly and mountainous areas, including a reverse filter, an integrated irrigation and drinking water collection corridor, an empty overflow dam, and a flexible stilling basin connected in sequence according to the water flow direction; the integrated irrigation and drinking water collection corridor includes an irrigation water collection corridor, the bottom end of which is connected to a sedimentation and desilting corridor, and the downstream side wall of the irrigation water collection corridor is connected to a domestic water storage chamber; the side wall of the irrigation water collection corridor has an inlet and an irrigation channel intake, and the domestic water storage chamber has a domestic water intake.

[0008] The invention is further characterized by: The filter body consists of a bottom impermeable slab and a filter layer on the bottom impermeable slab, with the bottom impermeable slab being no less than 10cm thick. The filter layer, arranged in the direction of water flow, includes riverbed gravel, coarse sand, crushed stone, and pebble layers. The coarse sand, crushed stone, and pebble layers are all wrapped with polyester staple fiber needle-punched geotextile and stacked in a staggered manner. The inlet is located on the upper part of the upstream side wall of the irrigation water collection corridor, and the filter body completely covers the inlet area. The inlet consists of several evenly distributed through holes, with stainless steel pipes inside the through holes, and filter cotton filled inside the pipes.

[0009] The upper end of the irrigation water collection channel is equipped with a piston adjustment chamber, the lower end of the piston adjustment chamber has a water passage, a rubber piston is slidably connected inside the piston adjustment chamber, and the upper end of the rubber piston is connected to the piston propulsion motor through the piston push rod.

[0010] The bottom of the sedimentation and discharge corridor is lower than that of the irrigation water collection corridor, and the bottom slope of the sedimentation and discharge corridor is not less than 5%. A silt removal device is installed at the upstream end of the sedimentation and discharge corridor, and a sewage outlet is opened at the other end. The sewage outlet is located downstream of the hollow overflow dam.

[0011] The silt removal device includes a pressurized water pump and a sludge removal pipe located in the sedimentation and discharge corridor. The inlet of the sludge removal pipe is connected to the pressurized water pump. The sludge removal pipe includes several parallel long pipes and short pipes. Each short pipe has one outlet, and each long pipe has multiple outlets. The outlets of the long pipes and short pipes are perpendicular to each other.

[0012] The hollow overflow dam is arranged perpendicular to the river channel along the dam axis. The hollow overflow dam includes an internal cavity and an external dam surface. The dam surface of the hollow overflow dam adopts a WES curve design, including a curved section at the top of the dam, a curved section in the middle of the dam body, and a reverse arc section at the bottom of the dam body. The lower reverse arc section is connected to the flexible stilling basin by a circular arc curve.

[0013] The irrigation canal intake is located on the upper part of the downstream side wall of the irrigation water collection corridor; the domestic water storage chamber is located inside the abdominal wall of the hollow overflow dam and is connected to the lower part of the downstream side wall of the irrigation water collection corridor; the inner wall of the domestic water storage chamber is made of polypropylene geomembrane bag structure, and a ceramic filter membrane is installed at the inlet of the domestic water storage chamber.

[0014] A sewage control gate is installed at the sewage outlet, and an irrigation water intake control gate is installed at the water intake of the irrigation canal; solar panels are installed on the upper surface of the integrated irrigation and drinking water collection corridor, and the solar panels are connected to the piston propulsion motor, the sewage control gate, the pressurized water pump and the irrigation water intake control gate respectively through circuits.

[0015] A geomembrane is laid at the bottom of the flexible stilling basin for seepage prevention. Ultra-weather-resistant polypropylene geogrids are laid on the geomembrane and filled with pebbles. Gabion cages are connected downstream of the flexible stilling basin.

[0016] The second technical solution adopted in this invention is a method for integrating irrigation and drinking water in high-standard farmland in hilly and mountainous areas. This method utilizes the aforementioned integrated irrigation and drinking water structure for high-standard farmland in hilly and mountainous areas for water intake, and is implemented according to the following steps: Step 1: Adjust the water level in the irrigation water collection corridor according to the actual water supply demand; Step 2: After the water in the river channel is initially filtered by the filter body, it enters the irrigation water collection corridor and the sediment discharge is carried out in the sediment discharge corridor. Step 3: Connect the external domestic water intake equipment to the drinking water pipe at the domestic water intake point to obtain domestic water for residents; Step 4: After the water level in the irrigation collection corridor reaches the water intake of the irrigation canal, water is drawn as needed.

[0017] The beneficial effects of this invention are: This invention improves the structure of the water collection corridor to achieve graded filtration of water within the corridor, simultaneously meeting the different water quality requirements for farmland irrigation and domestic drinking water, thus improving water resource utilization efficiency. It also allows for flexible adjustment of the collected water volume and supply flow rate according to actual irrigation and domestic water supply needs, adapting to the varied water usage scenarios in hilly and mountainous areas. By combining a reverse filter, a hollow overflow dam, and a flexible stilling basin in a coordinated arrangement, it reduces the land area required while effectively intercepting sediment and impurities, stabilizing river levels, and mitigating the impact of water erosion on structures. This achieves integrated clear and turbid water separation, safe water intake, and flood discharge and energy dissipation, significantly improving the stability and service life of the project, reducing subsequent maintenance costs, and balancing ecological protection with efficient water supply. Attached Figure Description

[0018] Figure 1 This is a top view schematic diagram of the integrated water intake structure for high-standard farmland irrigation and drinking water in hilly and mountainous areas according to the present invention; Figure 2 This is a longitudinal cross-sectional schematic diagram of the water intake structure of the present invention; Figure 3 This is a schematic diagram of the silt removal device in the water intake structure of the present invention; Figure 4 This is a partially enlarged schematic diagram of the domestic water intake cavity in the water intake structure of the present invention; Figure 5 This is a schematic diagram illustrating the power supply principle of the pressurized water pump and various control gates in this invention.

[0019] In the diagram, 1. Filter media, 2. Integrated irrigation and drinking water collection channel, 3. Hollow overflow dam, 4. Flexible stilling basin, 101. Impermeable base plate, 102. Riverbed gravel and pebbles, 103. Coarse sand layer, 104. Crushed stone layer, 105. Pebble layer, 201. Irrigation collection channel, 202. Sedimentation and sediment removal channel, 203. Domestic water storage chamber, 204. Inlet, 205. Irrigation canal intake, 206. Domestic water intake, 207. Piston regulating chamber, 208. 209. Rubber piston; 210. Piston push rod; 211. Piston push motor; 212. Sewage outlet; 213. Sewage control gate; 214. Booster pump; 215. Sewage cleaning pipe; 216. Ceramic filter membrane; 217. Irrigation water intake control gate; 218. Polypropylene geomembrane bag; 219. Solar panel; 300. Cover plate; 301. Abdominal wall; 302. Dam surface; 401. Impermeable membrane; 402. Ultra-weather resistant polypropylene geogrid; 403. Gabion. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] This invention provides an integrated water intake structure for high-standard farmland irrigation and drinking water in hilly and mountainous areas, such as... Figure 1 As shown, it includes a reverse filter 1, an integrated irrigation and drinking water collection corridor 2, an empty overflow dam 3, and a flexible stilling basin 4, which are connected in sequence according to the direction of water flow.

[0022] like Figure 2 As shown, the filter body 1 includes a bottom impermeable slab 101 and a filter layer on the bottom impermeable slab 101. The bottom impermeable slab 101 separates the filter layer from the riverbed. The bottom impermeable slab 101 is a concrete slab with a thickness of not less than 10 cm. The filter layer, in the direction of water flow, includes a riverbed gravel body 102, a coarse sand layer 103, a crushed stone layer 104, and a pebble layer 105. The coarse sand layer 103, crushed stone layer 104, and pebble layer 105 are all wrapped with polyester staple fiber needle-punched geotextile and stacked in a staggered manner. Using polyester staple fiber needle-punched geotextile to wrap the filter material as the filter layer allows for multiple replacements and cleanings of the filter layer, improving the filtration effect and reducing the replacement cost of the filter layer.

[0023] The integrated irrigation and drinking water collection corridor 2 includes an irrigation water collection corridor 201, the bottom of which is connected to a sedimentation and desilting corridor 202, and the downstream sidewall of the irrigation water collection corridor 201 is connected to a domestic water storage chamber 203. The sidewall of the irrigation water collection corridor 201 has an inlet 204 and an irrigation channel intake 205, respectively, and the domestic water storage chamber 203 has a domestic water intake 206. The irrigation water collection corridor 201, the sedimentation and desilting corridor 202, and the domestic water storage chamber 203 are an integrated, unified structure.

[0024] The upper end of the irrigation water collection channel 201 is equipped with a piston regulating chamber 207, and the lower end of the piston regulating chamber 207 has a water passage for increasing or decreasing the internal volume of the irrigation water collection channel 201. A rubber piston 208 is slidably connected inside the piston regulating chamber 207, and the rubber piston 208 slides up and down within the piston regulating chamber 207. The upper end of the rubber piston 208 is connected to a piston propulsion motor 210 through a piston propulsion rod 209. The water storage volume of the irrigation water collection channel 201 is regulated by the rubber piston 208. During the dry season or when the water volume in the collection channel is insufficient, the water level in the collection channel is adjusted to meet the water intake requirements of the irrigation canal; at the same time, it can also realize the backwashing of the inlet 204 and the gabion filter layer.

[0025] The inlet 204 is located on the upper part of the upstream side wall of the irrigation water collection corridor 201, and the filter body 1 completely covers the area of ​​the inlet 204. The inlet 204 consists of several evenly distributed through holes, and the through holes are filled with stainless steel pipes. The inside of the pipes is filled with filter cotton. Together with the sedimentation and sand removal corridor 202, it further purifies the water quality in the integrated irrigation and drinking water collection corridor 2, and at the same time reduces the siltation in the integrated irrigation and drinking water collection corridor 2.

[0026] The bottom of the sedimentation and discharge corridor 202 is lower than that of the irrigation water collection corridor 201, and the slope of the bottom of the sedimentation and discharge corridor 202 is not less than 5%; Figure 3 As shown, a silt removal device is installed at the upstream end of the sedimentation and discharge corridor 202, and a sewage outlet 211 is opened at the other end. The sewage outlet 211 is located downstream of the hollow overflow dam 3; a sewage control gate 212 is installed at the sewage outlet 211.

[0027] The silt removal device includes a pressurized water pump 213 and a cleaning pipe 214 located within the sedimentation and discharge corridor 202. The inlet of the cleaning pipe 214 is connected to the pressurized water pump 213. The cleaning pipe 214 includes several parallel long and short pipes. Each short pipe has an outlet, flushing along the slope of the sedimentation and discharge corridor 202. Each long pipe has multiple outlets. The outlets of the long and short pipes are perpendicular to each other, flushing against each other to dislodge the deposited silt for easy discharge. The pressurized water pump 213 is placed in a water supply well. Through the pressurized water pump 213 and the multiple outlets of the cleaning pipe 214, automated silt removal is achieved, improving silt removal efficiency and reducing labor costs.

[0028] The hollow overflow dam 3 is arranged perpendicular to the river channel along the dam axis. The hollow overflow dam 3 includes an internal cavity wall 301 and an external dam surface 302.

[0029] The domestic water storage chamber 203 is located within the abdominal wall 301 of the hollow overflow dam 3, and is connected to the lower part of the downstream side wall of the irrigation water collection corridor 201; such as Figure 4 As shown, a polypropylene geomembrane bag 217 is attached to the inner wall of the domestic water storage chamber 203. A ceramic filter membrane 215 is installed at the inlet of the domestic water storage chamber 203. The domestic water intake 206 is connected to the domestic water intake equipment through a drinking water pipe, which is made of PE pipe. The use of a ceramic filter membrane 215 for domestic water filtration improves filtration performance and ensures drinking water quality. The internal design of the polypropylene geomembrane bag effectively reduces leakage of filtered domestic water, improves the utilization efficiency of purified water, and saves water purification costs.

[0030] The irrigation canal intake 205 is located on the upper part of the downstream side wall of the irrigation water collection corridor 201, which can achieve surface water intake, thereby meeting the irrigation requirements for water temperature; an irrigation water intake control gate 216 is provided at the irrigation canal intake 205.

[0031] Solar panels 218 are installed on the upper surface of the integrated water collection corridor 2 for drinking water irrigation. Figure 5 As shown, the solar panel 218 is connected to the piston propulsion motor 210, the sewage control gate 212, the pressurized water pump 213 and the irrigation water intake control gate 216 through circuits to provide power to each component.

[0032] A cover plate 219 is installed on the upper surface of the integrated drinking water collection corridor 2.

[0033] The dam face 302 of the hollow overflow dam 3 adopts a WES curve design, including a curved section at the dam crest, a curved section in the middle of the dam body, and a reverse arc section at the bottom of the dam body. The lower reverse arc section connects to the flexible stilling basin 4 via a circular arc curve. Both the overflow dam's abdominal wall 301 and the dam face 302 are constructed of reinforced concrete. The weir crest elevation and overflow front length of the hollow overflow dam 3 are determined based on hydraulic calculations. The abdominal structure effectively saves on concrete usage; the abdominal structure, as a water storage space, increases the water storage volume, thereby increasing the water resource regulation capacity of the integrated irrigation and drinking water collection corridor 2, thus improving the water supply guarantee rate; the abdominal structure, as a water storage space, fully utilizes the self-weight of water, improving the stability of the hollow overflow dam.

[0034] The bottom of the flexible stilling basin 4 is covered with a seepage-proof membrane 401 for seepage prevention. A super-weather-resistant polypropylene geogrid 402 is laid on top of the membrane 401 and filled with pebbles. A gabion is attached downstream of the flexible stilling basin 4 as a conger eel. The specific dimensions of the flexible stilling basin 4 are obtained based on hydraulic calculations. The flexible modular stilling basin uses super-weather-resistant polypropylene geogrids filled with pebbles, allowing for the use of locally sourced materials, reducing material costs, and enabling multiple assembly and adjustment, thus reducing maintenance costs.

[0035] The working principle of this invention, which integrates irrigation and drinking water intake for high-standard farmland in hilly and mountainous areas, is as follows: During the high-water season, the river water flows through the filter body 1 to remove larger particles and impurities. Then, it is filtered again by the filter cotton in the stainless steel inlet 204 before entering the integrated irrigation and drinking water collection corridor 2. Due to the slow water flow, the unfiltered silt settles under gravity into the sedimentation and discharge corridor 202 at the front end of the integrated irrigation and drinking water collection corridor 2. After sedimentation, part of the water flows through the water passage at the lower end of the piston regulating chamber 207 and enters the domestic water storage chamber 203 through the ceramic filter membrane 215 as a drinking water source. The other part of the water is stored in the irrigation collection corridor 201. As the water flow continues, the water level gradually rises until it reaches the irrigation water intake control gate 216. When irrigation is needed, the irrigation water intake control gate 216 is opened, and the water in the irrigation collection corridor 201 is released through the irrigation channel intake 205 to meet the irrigation needs of high-standard farmland.

[0036] During the dry season, when the river has little water, the rubber piston 208 moves downward within the piston adjustment chamber 207, which reduces the volume of the irrigation water collection corridor 201, thereby raising the water level at the water intake 205 of the irrigation channel to meet the water intake demand. During the wet season, the rubber piston 208 moves upward, increasing the volume of the irrigation water collection corridor 201 and increasing its storage volume, thus reserving a certain amount of storage for the later dry season.

[0037] The high-standard integrated irrigation and drinking water intake method for hilly and mountainous areas utilizes the aforementioned high-standard integrated irrigation and drinking water intake structure for hilly and mountainous areas to simultaneously provide irrigation water for farmland and domestic water for residents. The specific implementation steps are as follows: Step 1: Adjust the water level in the irrigation water collection corridor 201 according to the actual water supply demand.

[0038] The specific steps for water level regulation within irrigation and water collection corridor 201 are as follows: Step 1-1: Calculate the available water volume of the river channel; Based on the availability of measured hydrological data, appropriate methods are selected to calculate the annual runoff of the river at different frequencies, and a typical hydrological year is selected to calculate the available water volume of the river.

[0039] Steps 1-2: Calculate the irrigation water demand and the drinking water demand respectively, conduct a water balance analysis, and obtain the surplus and deficit water volume of the river in each ten-day period; The irrigation system for the design year is determined based on factors such as the hydrology and meteorology of the irrigation area, water and soil resources, crop types, irrigation area scale, and irrigation methods, thereby calculating the irrigation water demand; the drinking water demand is calculated based on a population survey.

[0040] Steps 1-3: Calculate the design water level at point 205 of the irrigation canal intake; The water intake 205 of the irrigation canal should have a sufficient water level elevation to meet the needs of transporting, distributing, and delivering river water to various fields, ensuring irrigation within the canal's controlled area. The water level is calculated from bottom to top, based on the elevation of the control points within the irrigated area, various head losses, and the canal's layout. The calculation formula is as follows: (1), In formula (1), The design water level at the canal intake is expressed in meters (m). The elevation of the control points within the irrigation canal area is in meters. The elevation difference between the ground level at the control point and the design water level of the nearby final-stage fixed channel shall be determined based on the actual situation. The length of the channel is expressed in meters (m). For channel ratio reduction; This refers to the head loss of water flowing through canal structures.

[0041] Steps 1-4: Calculate the piston thrust distance; Assuming that during the dry season, the water level of the integrated irrigation and drinking water collection corridor... The water level at the irrigation canal intake does not meet the requirements. If required, the piston inside the piston adjustment chamber needs to be adjusted to change the piston's advance distance. The calculation formula is: (2), In formula (2), The width of the piston adjustment chamber, in meters (m). The width of the cavity at the water intake of the irrigation canal, in meters.

[0042] Step 2: After the water in the river is initially filtered by the filter body 1, it enters the integrated irrigation and drinking water collection corridor 2. The sediment removal device in the sedimentation and discharge corridor 202 is activated to discharge sediment, and the sewage control gate 212 is opened at the same time.

[0043] Step 3: Connect the external domestic water intake equipment at the domestic water intake point 206 through the drinking water pipe to obtain domestic water for residents.

[0044] Step 4: After the water level in the irrigation collection corridor 201 reaches the water intake 205 of the irrigation canal, water is drawn as needed to meet the irrigation needs of high-standard farmland.

[0045] Example 1 The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas in this embodiment includes a reverse filter 1, an integrated irrigation and drinking water collection corridor 2, an empty overflow dam 3, and a flexible stilling basin 4 connected in sequence according to the water flow direction; the integrated irrigation and drinking water collection corridor 2 includes an irrigation water collection corridor 201, the bottom end of which is connected to a sedimentation and desanding corridor 202, and the downstream side wall of the irrigation water collection corridor 201 is connected to a domestic water storage chamber 203; an inlet 204 and an irrigation channel intake 205 are respectively opened on the side wall of the irrigation water collection corridor 201, and a domestic water intake 206 is opened on the domestic water storage chamber 203.

[0046] The bottom of the sedimentation and discharge corridor 202 is 0.5m lower and 1.0m wider than the bottom of the irrigation water collection corridor 201; the height in front of the hollow overflow dam 3 is 5m, and the length of the overflow front edge is about 8m; the flexible stilling basin 4 is 4m long and the sea eel is 4m long; the irrigation channel intake 205 is a 60cm square channel.

[0047] The filter body 1 includes a bottom impermeable slab 101 and a filter layer on the bottom impermeable slab 101. The thickness of the bottom impermeable slab 101 is not less than 10cm. The filter layer includes, in the direction of water flow, a riverbed gravel body 102, a coarse sand layer 103, a crushed stone layer 104, and a pebble layer 105. The coarse sand layer 103, the crushed stone layer 104, and the pebble layer 105 are all wrapped with polyester staple fiber needle-punched geotextile and stacked in a staggered manner. The riverbed gravel body 102 is 3m long and 1.5m high. The thickness of the coarse sand layer 103, the crushed stone layer 104, and the pebble layer 105 is 0.5m. The bottom impermeable slab 101 is a concrete slab with a thickness of 10cm.

[0048] The inlet 204 is located on the upper part of the upstream side wall of the irrigation water collection corridor 201, and the filter body 1 completely covers the area of ​​the inlet 204. The inlet 204 consists of several evenly distributed through holes. The inlet 204 is distributed in a plum blossom pattern, with a diameter of 10cm, a spacing of 20cm, and an average of 3 rows. The material is stainless steel pipe, and the inside of the stainless steel pipe is filled with filter cotton.

[0049] Example 2 The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas in this embodiment includes a reverse filter 1, an integrated irrigation and drinking water collection corridor 2, an empty overflow dam 3, and a flexible stilling pool 4 connected in sequence according to the water flow direction. The integrated irrigation and drinking water collection corridor 2 includes an irrigation water collection corridor 201, the bottom of which is connected to a sedimentation and desilting corridor 202, and the downstream side wall of the irrigation water collection corridor 201 is connected to a domestic water storage chamber 203. The side wall of the irrigation water collection corridor 201 is respectively provided with an inlet 204 and an irrigation channel intake 205, and the domestic water storage chamber 203 is provided with a domestic water intake 206.

[0050] Example 3 The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas in this embodiment includes a reverse filter 1, an integrated irrigation and drinking water collection corridor 2, an empty overflow dam 3, and a flexible stilling pool 4 connected in sequence according to the water flow direction. The integrated irrigation and drinking water collection corridor 2 includes an irrigation water collection corridor 201, the bottom of which is connected to a sedimentation and desilting corridor 202, and the downstream side wall of the irrigation water collection corridor 201 is connected to a domestic water storage chamber 203. The side wall of the irrigation water collection corridor 201 is respectively provided with an inlet 204 and an irrigation channel intake 205, and the domestic water storage chamber 203 is provided with a domestic water intake 206.

[0051] The filter body 1 includes a bottom impermeable slab 101 and a filter layer on the bottom impermeable slab 101. The thickness of the bottom impermeable slab 101 is not less than 10cm. The filter layer includes, in the direction of water flow, a riverbed gravel body 102, a coarse sand layer 103, a crushed stone layer 104, and a pebble layer 105. The coarse sand layer 103, the crushed stone layer 104, and the pebble layer 105 are all wrapped with polyester staple fiber needle-punched geotextile and stacked in a staggered manner. The inlet 204 is located on the upper part of the upstream side wall of the irrigation water collection corridor 201, and the filter body 1 completely covers the area of ​​the inlet 204. The inlet 204 consists of several evenly distributed through holes, and the through holes are filled with stainless steel pipes, and the inside of the pipes is filled with filter cotton.

[0052] Example 4 The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas in this embodiment includes a reverse filter 1, an integrated irrigation and drinking water collection corridor 2, an empty overflow dam 3, and a flexible stilling pool 4 connected in sequence according to the water flow direction. The integrated irrigation and drinking water collection corridor 2 includes an irrigation water collection corridor 201, the bottom of which is connected to a sedimentation and desilting corridor 202, and the downstream side wall of the irrigation water collection corridor 201 is connected to a domestic water storage chamber 203. The side wall of the irrigation water collection corridor 201 is respectively provided with an inlet 204 and an irrigation channel intake 205, and the domestic water storage chamber 203 is provided with a domestic water intake 206.

[0053] The upper end of the irrigation water collection corridor 201 is provided with a piston adjustment chamber 207, the lower end of the piston adjustment chamber 207 has a water passage, and a rubber piston 208 is slidably connected inside the piston adjustment chamber 207. The upper end of the rubber piston 208 is connected to the piston propulsion motor 210 through the piston propulsion rod 209.

[0054] The bottom of the sedimentation and discharge corridor 202 is lower than that of the irrigation water collection corridor 201, and the slope of the bottom of the sedimentation and discharge corridor 202 is not less than 5%. A silt removal device is installed at the upstream end of the sedimentation and discharge corridor 202, and a sewage outlet 211 is opened at the other end. The sewage outlet 211 is located downstream of the hollow overflow dam 3.

[0055] The silt removal device includes a pressurized water pump 213 and a cleaning pipe 214 located in the sedimentation and discharge corridor 202. The inlet of the cleaning pipe 214 is connected to the pressurized water pump 213. The cleaning pipe 214 includes several parallel long pipes and short pipes. Each short pipe has an outlet and flushes along the slope of the sedimentation and discharge corridor 202. Each long pipe has multiple outlets, and the outlets of the long pipes and short pipes are perpendicular to each other.

[0056] Example 5 The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas in this embodiment includes a reverse filter 1, an integrated irrigation and drinking water collection corridor 2, an empty overflow dam 3, and a flexible stilling pool 4 connected in sequence according to the water flow direction. The integrated irrigation and drinking water collection corridor 2 includes an irrigation water collection corridor 201, the bottom of which is connected to a sedimentation and desilting corridor 202, and the downstream side wall of the irrigation water collection corridor 201 is connected to a domestic water storage chamber 203. The side wall of the irrigation water collection corridor 201 is respectively provided with an inlet 204 and an irrigation channel intake 205, and the domestic water storage chamber 203 is provided with a domestic water intake 206.

[0057] The hollow overflow dam 3 is arranged perpendicular to the river channel along the dam axis. The hollow overflow dam 3 includes an internal cavity wall 301 and an external dam surface 302. The irrigation canal intake 205 is located on the upper part of the downstream side wall of the irrigation water collection corridor 201; the domestic water storage cavity 203 is located inside the abdominal wall 301 of the hollow overflow dam 3 and is connected to the lower part of the downstream side wall of the irrigation water collection corridor 201; the inner wall of the domestic water storage cavity 203 is made of polypropylene geomembrane bag structure, and a ceramic filter membrane 215 is provided at the inlet of the domestic water storage cavity 203.

[0058] A sewage control gate 212 is installed at the sewage outlet 211, and an irrigation water intake control gate 216 is installed at the irrigation canal water intake 205. A solar panel 218 is installed on the upper surface of the integrated irrigation and drinking water collection corridor 2. The solar panel 218 is connected to the piston propulsion motor 210, the sewage control gate 212, the pressurized water pump 213 and the irrigation water intake control gate 216 respectively through the circuit.

[0059] Example 6 The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas in this embodiment includes a reverse filter 1, an integrated irrigation and drinking water collection corridor 2, an empty overflow dam 3, and a flexible stilling pool 4 connected in sequence according to the water flow direction. The integrated irrigation and drinking water collection corridor 2 includes an irrigation water collection corridor 201, the bottom of which is connected to a sedimentation and desilting corridor 202, and the downstream side wall of the irrigation water collection corridor 201 is connected to a domestic water storage chamber 203. The side wall of the irrigation water collection corridor 201 is respectively provided with an inlet 204 and an irrigation channel intake 205, and the domestic water storage chamber 203 is provided with a domestic water intake 206.

[0060] The dam face 302 of the hollow overflow dam 3 adopts a WES curve design, including a dam crest curve section, a dam body middle curve section and a dam body lower reverse arc section. The lower reverse arc section is connected to the flexible stilling basin 4 through a circular arc curve. The bottom of the flexible stilling basin 4 is covered with a seepage-proof membrane 401 for seepage prevention. A super weather-resistant polypropylene geogrid 402 is laid on the seepage-proof membrane 401. The super weather-resistant polypropylene geogrid is filled with pebbles. The downstream of the flexible stilling basin 4 is connected to a gabion.

Claims

1. A high-standard farmland irrigation and drinking water integrated water intake structure for hilly and mountainous areas, characterized in that, It includes a reverse filter (1), an integrated irrigation and drinking water collection corridor (2), an empty overflow dam (3), and a flexible stilling basin (4) connected in sequence according to the direction of water flow. The integrated irrigation and drinking water collection corridor (2) includes an irrigation water collection corridor (201), the bottom end of which is connected to a sedimentation and desanding corridor (202), and the downstream side wall of the irrigation water collection corridor (201) is connected to a domestic water storage chamber (203); the side wall of the irrigation water collection corridor (201) is respectively provided with an inlet (204) and an irrigation channel water intake (205), and the domestic water storage chamber (203) is provided with a domestic water intake (206).

2. The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas according to claim 1, characterized in that, The filter body 1 includes a bottom impermeable plate (101) and a filter layer on the bottom impermeable plate (101). The thickness of the bottom impermeable plate (101) is not less than 10cm. The filter layer includes, in the direction of water flow, riverbed gravel body (102), coarse sand layer (103), crushed stone layer (104) and pebble layer (105). The coarse sand layer (103), crushed stone layer (104) and pebble layer (105) are all wrapped with polyester staple fiber needle-punched geotextile and stacked in a staggered manner. The inlet (204) is located on the upper part of the upstream side wall of the irrigation water collection corridor (201), and the filter body (1) completely covers the area of ​​the inlet (204). The inlet (204) consists of several evenly distributed through holes, and the through holes are filled with stainless steel pipes and filter cotton.

3. The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas according to claim 1, characterized in that, The upper end of the irrigation water collection corridor (201) is provided with a piston adjustment chamber (207), the lower end of the piston adjustment chamber (207) has a water passage, and a rubber piston (208) is slidably connected in the piston adjustment chamber (207). The upper end of the rubber piston (208) is connected to the piston propulsion motor (210) through the piston push rod (209).

4. The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas according to claim 3, characterized in that, The bottom of the sedimentation and discharge corridor (202) is lower than that of the irrigation water collection corridor (201), and the slope of the bottom of the sedimentation and discharge corridor (202) is not less than 5%. A silt removal device is installed at the upstream end of the sedimentation and discharge corridor (202), and a sewage outlet (211) is opened at the other end. The sewage outlet (211) is located downstream of the hollow overflow dam (3).

5. The integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas according to claim 4, characterized in that, The silt removal device includes a pressurized water pump (213) and a cleaning pipe (214) located in the sedimentation and discharge corridor (202). The inlet of the cleaning pipe (214) is connected to the pressurized water pump (213). The cleaning pipe (214) includes several parallel long pipes and short pipes. Each short pipe has an outlet, and each long pipe has multiple outlets. The outlet directions of the long pipes and short pipes are perpendicular to each other.

6. The integrated water intake structure for high-standard farmland irrigation and drinking water in hilly and mountainous areas according to claim 1, characterized in that, The hollow overflow dam (3) is arranged perpendicular to the river channel along the dam axis. The hollow overflow dam (3) includes an internal abdominal wall (301) and an external dam surface (302). The dam surface (302) of the hollow overflow dam (3) adopts the WES curve design, including the dam crest curve section, the middle curve section of the dam body and the lower reverse arc section of the dam body. The lower reverse arc section is connected to the flexible stilling pool (4) through a circular arc curve.

7. The integrated water intake structure for high-standard farmland irrigation and drinking water in hilly and mountainous areas according to claim 1, characterized in that, The irrigation canal intake (205) is located on the upper part of the downstream side wall of the irrigation water collection corridor (201); the domestic water storage cavity (203) is located inside the abdominal wall (301) of the hollow overflow dam (3) and is connected to the lower part of the downstream side wall of the irrigation water collection corridor (201); the inner wall of the domestic water storage cavity (203) is made of polypropylene geomembrane bag structure, and a ceramic filter membrane (215) is provided at the inlet of the domestic water storage cavity (203).

8. The integrated water intake structure for high-standard farmland irrigation and drinking water in hilly and mountainous areas according to claim 5, characterized in that, The sewage outlet (211) is equipped with a sewage control gate (212), and the irrigation canal intake (205) is equipped with an irrigation water intake control gate (216). The upper end of the integrated irrigation and drinking water collection corridor (2) is equipped with a solar panel (218), which is connected to the piston propulsion motor (210), the sewage control gate (212), the pressurized water pump (213) and the irrigation water intake control gate (216) respectively through the circuit.

9. The integrated water intake structure for high-standard farmland irrigation and drinking water in hilly and mountainous areas according to claim 1, characterized in that, The bottom of the flexible stilling pool (4) is covered with a seepage-proof membrane (401) for seepage prevention. A super weather-resistant polypropylene geogrid (402) is laid on the seepage-proof membrane (401). The super weather-resistant polypropylene geogrid is filled with pebbles. The downstream of the flexible stilling pool (4) is connected to a gabion (403).

10. A method for integrating irrigation and drinking water intake in high-standard farmland in hilly and mountainous areas, comprising using the integrated irrigation and drinking water intake structure for high-standard farmland in hilly and mountainous areas as described in any one of claims 1 to 9, characterized in that, The specific steps are as follows: Step 1: Adjust the water level in the irrigation water collection corridor (201) according to the actual water supply demand; Step 2: After the water in the river is initially filtered by the filter body (1), it enters the irrigation water collection corridor (201) and the sediment discharge corridor (202) is controlled to discharge sediment. Step 3: Connect the external domestic water intake equipment through the drinking water pipe at the domestic water intake (206) to obtain domestic water for residents; Step 4: After the water level in the irrigation collection corridor (201) reaches the water intake (205) of the irrigation canal, water is drawn as needed.

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