70 results about "Main stem" patented technology

The invention discloses a distributed model-oriented medium and small watershed sub-watershed division method, which comprises the following steps of S1, collecting digital elevation model data, performing depression filling processing, and extracting preliminary river network information; s2, extracting an actual water system, and calculating a river network main stream grid elevation difference; s3, adjusting digital elevation model data according to the elevation difference, and optimizing a river network extraction result; s4, basin morphological parameters are calculated, and basin classification is carried out through a manifold learning method; s5, constructing a sub-basin optimal threshold calculation model, and dynamically adjusting a sub-basin division threshold; s6, flow direction calculation, confluence analysis and sub-basin division are carried out, and sub-basin boundaries are optimized; and S7, verification is carried out in combination with the distributed hydrological model, the influence of the division result is analyzed, and sub-basin division parameters are optimized. According to the method, multi-scale features, dynamic threshold optimization and hydrological network topology are fused, sub-basin division precision, boundary continuity and hydrological simulation stability are improved, and intelligent basin division is realized.

The invention relates to a river network grading system and method based on a graph theory and confluence cumulant, and belongs to the technical field of water conservancy projects and geographic information. Comprising the following steps: acquiring original DEM data and water system data, and converting the water system data to a preset projection coordinate system; extracting a primary river network based on the DEM data, and screening the primary river network in combination with the length of the river network and the area of the drainage basin to obtain a simplified river network; river network flow calculation: carrying out flow assignment on each river network element in the simplified river network based on the confluence cumulant; graph theory modeling: abstracting the simplified river network into a directed graph model; and river network grading: reverse tracing is carried out by taking the water outlet as a starting point, and the hierarchical relationship between the trunk and the branch is determined by combining the in-degree / out-degree and the edge weight of the node, so that river network grading is realized. According to the method, river network grading is upgraded from morphological description to hydrological function description, and the method is suitable for high-precision river network refined analysis, intelligent water conservancy emergency management and other scenes.

A method and device for determining a flood-diversion strategy of a flood storage and detention basin based on a balanced perspective is provided. The method includes determining excess flood peaks and excess flood amounts of middle and downstream main streams in a preset time period after scheduling and enabling of a reservoir group in each river section. A correlation map between a flood-diversion amount and a flood-diversion water-level reduction value under each set flood-diversion parameter combination is then constructed. Enabling priorities and flood-diversion volumes for all flood storage and detention basins in all river sections are determined. A cumulative flood-diversion volume of each flood storage and detention basin is also determined. A flood storage and detention basin-enabling knowledge map is constructed and a plurality of flood-diversion plans are determined. A flood-diversion plan from the plurality of flood-diversion plans is then selected as a target plan to allow flood diversion.

Disclosed is a method for regulating confluence of tributaries with a large drop difference and a large angle into a trunk canal. The method includes: banking up a reservoir at an upstream end of a tributary river, and widening a water surface, such that uniform distribution of water flows is completed; then conducting scouring and energy dissipation to reduce a flow velocity and kinetic energy of the water flows; then conducting flow-slowing sedimentation, such that sediment is deposited on one side of the tributary river connected to a downstream side of a trunk stream; and then conducting flow diversion at one side of the tributary river connected to an upstream side of the trunk stream, such that an included angle of confluence of tributary river water into the trunk stream is reduced.

This invention discloses a method, device, medium, and product for determining flood diversion strategies for flood storage and detention areas based on a balance perspective, relating to the field of flood diversion management technology. The method includes: determining the excess flood peak and excess flood volume of the middle and lower reaches of the main stream in each river section after the operation of the reservoir group scheduling in a preset period; constructing a correlation graph between the flood diversion volume and the reduction value of the flood diversion flood level under each set combination of flood diversion parameters; determining the utilization priority and flood diversion volume of all flood storage and detention areas in all river sections; determining the cumulative flood diversion volume of each flood storage and detention area according to the order of utilization priority; constructing a knowledge graph of flood storage and detention area utilization based on the correlation graph and each cumulative flood diversion volume, and determining multiple flood diversion schemes; and selecting one flood diversion scheme as the target scheme from among the flood diversion schemes based on the objective function and constraints to achieve flood diversion. This method can support the timely and appropriate scheduling and utilization of flood storage and detention areas, meet the rapid decision-making needs of key indicators for the utilization of flood storage and detention areas, and reduce flood disaster losses.

The present invention provides a method for identifying upstream and downstream hydrological stations of a river channel based on existing GIS data, belonging to the field of digital twins of hydrological information. According to the hydrological station coordinate GIS data and the river network vector map, the present invention finds any number of stations upstream and downstream of the river channel corresponding to a given station number; displays the topological relationship diagram of the upstream and downstream stations of the given station; determines whether other stations are located upstream of the given station and which of the main stream and tributaries in the upstream basin they are in; saves the upstream and downstream topological relationship of the stations and the river network edge table in a text file for subsequent analysis. The present invention only needs to construct two layer files based on the existing GIS data to be able to identify the upstream and downstream hydrological stations of the river channel, which can greatly save the workload of manually searching for the upstream and downstream hydrological stations of specific stations. For large river networks and station layers, it has high accuracy and fast operation speed, and can be used as a favorable basis for the digital twin of the river network.

A comprehensive system for hatching drifting fish eggs includes a culture tank, a flow control system, a roundabout real-time monitoring system, a stepped egg transfer system, an egg release system, an egg collection system, a tailwater collection platform, and a water storage tank. This system eliminates the influence of previous single-factor conditions on hatching, achieving the adjustability of influencing factors under different hatching environments, real-time tracking of the entire egg hatching process, and simulation of natural water flow conditions. During the hatching process, the system replaces the cumbersome operation of multiple manual egg releases in previous patents with a single, fully automated egg release process, thereby improving the egg hatching rate. Furthermore, to identify the drifting path patterns of the eggs during hatching, side-view and top-view egg drift monitoring systems and a hydraulic characteristics testing system are provided. The hatching drift distance of the eggs, as calculated by the monitoring system, can provide a reference for the fish species richness of the river's main stream and tributaries.

The invention discloses a space remote sensing image analysis method for detecting surface water and underground water exchange in a river region based on surface temperature, and belongs to the field of remote sensing detection surface temperature anomaly analysis. According to the method, background field construction is carried out on pixels in a space by combining single-scene high-resolution surface temperature data and land cover classification data, and temperature thermal anomaly of a river main stream is extracted by adopting an adjacent pixel temperature anomaly analysis method, namely, the temperature thermal anomaly of the river main stream is extracted by analyzing subtle change of surface temperature in a remote sensing image; and identifying abnormal pixels which are obviously different from the temperature characteristics of the surrounding area. The abnormal pixels often correspond to areas where surface water and underground water exchange is active, such as permeable zones, spring water exposure points and the like. The method can be applied to drainage basin water resource management and ecological protection, and the conversion path and intensity between surface water and underground water can be deduced by further analyzing and processing the abnormal pixels extracted by the method and combining background information such as geology and hydrology.

The invention discloses a river and lake system mutual jacking effect strength identification method and device, equipment and a medium, and relates to the field of jacking effect identification. The method comprises the following steps: according to observation data of a river and lake system, determining an upstream and downstream actual water level difference and an inlet downstream main stream flow when a jacking effect exists; according to the flow and the water level of the upstream main stream of the inlet, the actual water level difference and the water level of the downstream main stream of the inlet, establishing a water level-flow relation of the upstream main stream of the inlet considering the water return influence; according to the flow and the water level of the downstream main stream of the inlet, establishing a water level-flow relation of the downstream main stream of the inlet without water return influence; under the condition of no branch flow convergence, based on the water level-flow relation, the theoretical water level difference under the condition of no jacking effect is calculated; according to the actual water level difference and the theoretical water level difference, a jacking strength index value is calculated; the jacking strength index value is used for representing the mutual jacking action strength of the river and lake system. According to the method, the accuracy and reliability of identifying the mutual jacking action strength of the river and lake system can be improved.

The invention provides a multi-temporal-spatial-scale river sediment tracing method, and relates to the field of geomorphology and river dynamics. According to the method, light release light (OLS) samples of terraces and floodplains and zircon sand samples of corresponding layers are collected on the sections of a source (branch) and a sink (main stream), and different age sequences are divided in combination with contemporary zircon sand samples of a tender beach; the contribution rate of a source to a sink is directly calculated by using a zircon age spectrum matrix, and a quality contribution rate algorithm is optimized in combination with a zircon mass percentage. According to the method, contemporary and historical multi-time-scale sediment traceability is realized, the traditional fitting simulation process is simplified, the calculation efficiency and accuracy are improved, and the method is suitable for sediment source analysis in areas poor in data.

The present application discloses a river channel terrain modeling method and related devices based on data interpolation, which relates to the technical field of river channel terrain modeling. The method includes: first, obtaining river channel image data and measured cross-section elevation data, and accordingly drawing several river channel lines; then, for any one river channel line, interpolating the river channel line based on the elevation data of the intersection points of the river channel line and the adjacent two cross-sections to obtain the elevation data of each interpolation point, and connecting the river channel lines of the main stream and the tributaries at the confluence of the main and tributary streams to obtain the elevation data of the river channels in the basin; finally, based on the elevation data of the river channels in the basin, generating triangular meshes of the river channels in the basin, and using the inverse distance weighted method for interpolation to obtain a high-precision triangular mesh model of the river channels in the basin. The present application can generate dense and evenly distributed river channel terrain elevation data based on river channel cross-section data and river channel image data, provide terrain data support for two-dimensional hydrodynamic model modeling, and help improve the modeling accuracy of the hydrodynamic model.

The utility model relates to the technical field of grape planting, in particular to a drip irrigation device for grape planting, which comprises an annular notch-shaped rubber water pipe, the lower end of the annular notch-shaped rubber water pipe is communicated with a plurality of drip irrigation heads, the upper end of the annular notch-shaped rubber water pipe is symmetrically provided with wire clamping mechanisms, and each wire clamping mechanism comprises an L-shaped plate. The drip irrigation device comprises an annular notch-shaped rubber water pipe, a drip irrigation head, a fixing block, a threaded column and a rotating piece, the annular notch-shaped rubber water pipe is sleeved with an L-shaped plate, the L-shaped plate is fixedly connected to the upper end of the annular notch-shaped rubber water pipe, a wire clamping groove is formed in the horizontal wall of the L-shaped plate, and a wire pressing plate is arranged on the vertical wall of the L-shaped plate in a sliding and sleeving mode. The drip irrigation device has the advantages that through cooperation of the annular notch-shaped rubber water pipe, the drip irrigation head, the L-shaped plate, the wire clamping groove, the wire pressing plate, the fixing block, the threaded column and the rotating piece; the drip irrigation pipes in the drip irrigation system for grape planting are easy to install, water drops can drop on the ground around grape trunks, suspended laying of the drip irrigation pipes is easy to operate, and the uniformity of the roots of grape vines nourished by water is high.

The application provides a simulation device for nitrogen migration and transformation, which comprises an input unit, a simulation unit, a biological unit, a regulation unit and a data processing unit, the input unit is used to simulate the migration of nitrogen source input from a downstream river to a surrounding area; the simulation unit comprises a river channel simulation mechanism, a confluence triangular area simulation tank, a first side bank simulation tank of a main stream and a second side bank simulation tank of the main stream, the biological unit controls aerobic / anaerobic partition and nitrification / denitrification partition by regulating carbon source, oxygen and controlling soil structure / particle, the regulation unit is arranged in the confluence triangular area simulation tank, the first side bank simulation tank of the main stream and the second side bank simulation tank of the main stream, and is used to regulate dissolved oxygen, PH and conductivity, and the data processing unit is used to give a prediction result. The application solves the problem that a traditional water tank cannot simulate the interaction of two rivers, and improves the accuracy of simulation experiment.

The utility model relates to the technical field of green planting and discloses a sand land windproof sand fixation green planting equipment based on bentonite, which comprises a planting cylinder and a supporting mechanism arranged on the planting cylinder. The planting cylinder below the fixing ring and the green plants are buried in the soil, then the rotating handle drives the threaded rod to rotate, the adjusting seat is pushed to move along the limiting groove, the supporting plate abuts against the main stem of the green plants, the main stem of the green plants is supported, the problem that the green plants are blown down by the wind is avoided, the supporting plate is adjustable and can be used to support green plants of different thicknesses, when the green plants grow thicker, the first spring arranged between the supporting plate and the adjusting seat allows the supporting plate to shrink, the supporting position of the supporting plate can change with the growth of the green plants, and the problem that the fixed supporting position affects the growth of the green plants is avoided.

The application belongs to the technical field of oil exploitation and blockage removal device, and particularly relates to a T-shaped nozzle water jet cutting blockage removal device and a dredging blockage removal method, aiming to solve the problem of poor flushing and dredging effect and difficulty in cleaning the pipe wall deposits of the sand control screen pipe blockage removal device in the prior art. The T-shaped nozzle water jet cutting blockage removal device comprises a high-pressure jet pump, a packer, a downhole filter, a centralizing device and a nozzle in sequence in communication with each other. At least one T-shaped nozzle is arranged on the nozzle peripheral wall. The T-shaped nozzle comprises a main stem pipe and two branch stem pipes. One end of the main stem pipe is in conductive connection with the nozzle, and the two branch stem pipes are in conductive connection with the end portions of the main stem pipe away from the nozzle, and the two branch stem pipes are arranged in opposite directions along the same straight line. The end of the main stem pipe away from the nozzle is provided with a first jet port, and the end portions of the two branch stem pipes away from each other are provided with second jet ports. The application has the advantages of higher dredging effect, and the pipe wall deposits can be removed more easily.

The present invention discloses a method for determining the outflow threshold value of a river channel in a river-controlled estuary based on an improved entropy weight method, comprising the following steps: S1: collecting historical topographic data of a fixed section of a main stream channel at the tail end of a river-controlled estuary, and historical daily average hydrological data of hydrological stations along the channel; S2: applying the improved entropy weight method to the main stream channel at the tail end of the estuary based on the hydrological and topographic data, calculating the contribution weights of different indicators in water-sediment conditions and riverbed boundary conditions to the outflow of the channel, and identifying the main controlling factors of the outflow of the channel according to the calculation results; S3: establishing a prediction model for the outflow threshold value of an estuary channel under the joint control of riverbed boundary conditions and water-sediment conditions based on the main controlling factors of the outflow; the present invention simplifies the calculation method of the outflow threshold value and greatly improves the applicability of the method; the present invention proposes a method for determining the outflow threshold value of an estuary channel by considering water-sediment and boundary conditions at the same time, which can be applied to river-controlled estuaries with different outflow periods, and provides guidance for estuary flood control and river channel management.

The application discloses a method for rapidly improving river water dissolved oxygen, and belongs to the technical field of environmental protection. The method comprises the following technical steps: (1) water quality fluorescence fingerprint database establishment; (2) pollution source dissolved oxygen concentration gradient division; (3) low-oxygen discharge outlet dissolved oxygen and water flow determination; (4) water quality fluorescence fingerprint similarity comparison; and (5) river required ecological water flow calculation. The method comprises the following steps: establishing a water quality fluorescence fingerprint database, dividing a pollution source dissolved oxygen concentration gradient, determining low-oxygen discharge outlet dissolved oxygen and water flow, comparing water quality fluorescence fingerprint similarity, and calculating the ecological water flow required for river water dissolved oxygen to reach the standard. Then, the ecological water flow is dispatched to equivalently hedge the water body with low dissolved oxygen concentration in the river mainstream, so that the river water dissolved oxygen concentration can be simply, rapidly, efficiently and accurately improved, water resource waste in the water flow dispatching process is avoided, the method has good precision and strong operability, and is easy to popularize on a large scale.

This invention provides a method for selecting plants that possess desired traits regarding the internode length of the main stem. [Solution] One aspect of the present invention is a selection method that includes a step of selecting plants using the length of the young shoot at the third leaf development stage as an indicator.

The application discloses a device for collecting fry and juvenile fish in the main stream of the Yellow River, which comprises a collecting head, a collecting box, a drainage end and a support, the left and right sides of the collecting box are respectively provided with the collecting head and the drainage end, and the collecting box is further provided with the support, the collecting head is a conical cylinder, the large end of the conical cylinder is provided with a multi-hole conical cover which is gathered away from the conical cylinder, the small end of the conical cylinder is communicated with a water inlet pipe of the collecting box, the drainage end is a drainage pipe on the collecting box opposite to the water inlet pipe, a flowmeter and an axial flow pump are arranged on the end of the drainage pipe away from the collecting box, the collecting box is provided with a one-way self-closing structure and a fry and juvenile fish filtering conical cylinder corresponding to the water inlet pipe and the drainage pipe, and the fry and juvenile fish filtering conical cylinder is provided with an induction cylinder on the front and back sides. The device is used for collecting fry and juvenile fish in an active way, and the food induction cylinder is arranged in the collecting box to attract the fry and juvenile fish to stay, so that the fry and juvenile fish can be efficiently collected, and the fish quality resources in the main stream of the Yellow River can be conveniently and quickly monitored.

The invention belongs to the technical field of agriculture, and particularly relates to a wheat filling stage shading stress test sampling method which comprises the following steps: selecting wheat of the same variety, and selecting a group of main stem ears which are consistent in growth vigor and bloom on the same day on the bloom day of the wheat of the variety for marking; respectively carrying out post-flowering shading treatment and non-shading treatment on the main stem ears with the marks; from the grain filling stage to the mature stage of the wheat, sampling the processed main stem ears at intervals, and recording agronomic character indexes of the main stem ears; the average ear grain number of the main stem ears subjected to shading treatment is used as a reference number, the main stem ears with the ear grain number close to the reference number in non-shading treatment are selected as non-shading samples, and the difference value range of the average ear grain number of the selected non-shading samples and the reference number is-1.5-1.5; according to the method, the sampling error is reduced, the shading test sampling process in the wheat filling period is optimized, and a new data analysis method is provided for the wheat filling test.

The invention provides a pinus khasys dwarfing pruning treatment method, and relates to the technical field of pinus khasys dwarfing afforestation. The treatment method mainly comprises the following steps: girdling bark at the top end of a pinus khasys sapling, cutting off below a girdling position after a period of time, carrying out primary pruning on a primary side branch, then carrying out branch pulling treatment, taking a part as a fixed side branch, taking a part as an allowance side branch, and arranging a notch at the joint of the allowance side branch and a trunk, after the cut grows into a tree knot, the remaining lateral branches are cut off, the fixed lateral branches are subjected to secondary pruning, the fixed lateral branches are subjected to third-time pruning after a period of time, and final pruning is completed. According to the method, the defects in the prior art are overcome, thickening of trunks and lateral branches of pinus khasys is effectively promoted in a pruning mode, and the purpose of dwarf afforestation is achieved.

The application discloses a kind of based on three-dimensional point cloud image's Pinus massoniana partial phenotypic parameter automatic measurement method. Three-dimensional point cloud image of Pinus massoniana plant under different viewing angles is collected;Pretreatment obtains the three-dimensional point cloud of Pinus massoniana plant;Registration is carried out to obtain fused point cloud;Extract the minimum spanning tree and the skeleton point of main stem, and then obtain the main stem point cloud and leaf point cloud;According to the minimum spanning tree, main stem point cloud and leaf point cloud processing obtain main stem length, Pinus massoniana ground diameter, average leaf length and leaf number.The method of the application can automatically identify Pinus massoniana plant in three-dimensional point cloud image, and complete the strategy of main diameter length, ground diameter, average leaf length, leaf length, improve the detection efficiency, realize high-precision, high-efficiency crop phenotypic data acquisition, achieve fast, low-cost crop phenotypic parameter accurate and nondestructive testing.

The present invention discloses a parallel computing method for flood forecasting in a super-large river network, comprising the following steps: dividing the sub-region boundaries within the study area with reference to the abrupt change points of the terrain slope and the confluence points of the tributaries to ensure that there are complete water flow outlets within the sub-regions; constructing the hydrodynamic continuity equation and the hydrodynamic momentum equation for each sub-region, and performing discretization to calculate the water depth h and the flow velocity u of each spatial node within the sub-region; building a parallel computing framework and inputting the discretized hydrodynamic continuity equation and hydrodynamic momentum equation into each computing node of the parallel computing framework; after each computing node calculates the water depth and the flow velocity of the spatial nodes, the water depth and the flow velocity are accumulated to calculate the flood forecasting data of the main river channel within the study area. By dividing the super-large river network into multiple sub-regions and implementing parallel computing, the present invention greatly reduces the computing duration of flood forecasting, effectively meets the urgent needs of real-time flood forecasting, and wins more valuable time for flood control and disaster reduction decision-making.

The utility model discloses a water delivery arrangement system, particularly discloses a water delivery arrangement system for relieving low-temperature water drainage, and belongs to the technical field of design and construction of water conservancy and hydropower engineering structures. According to the water delivery arrangement system for relieving low-temperature water drainage, the excavation work amount is remarkably reduced, and it can be effectively ensured that water with the relatively high temperature and the relatively sufficient flow can be taken at any time. The water conveying arrangement system comprises a water storage reservoir which is arranged on a main stream river channel through a river blocking dam, and is characterized by further comprising a branch ditch river channel, a water conveying pipeline and a water inlet tower arranged at the input end of the water conveying pipeline, the branch ditch river channel is communicated with the water storage reservoir, and the water inlet tower is arranged on the branch ditch river channel; the river bottom elevation of the branch ditch river channel is higher than the riverbed elevation at the corresponding position of the main stream river channel and lower than the dead water level elevation of the reservoir; in the water taking process, the water inlet tower obtains stored water in the reservoir area of the water storage reservoir layer by layer from top to bottom through the branch ditch river channel.

A chenopodium quinoa cultivation protective cover belongs to the technical field of chenopodium quinoa cultivation and comprises an elastic outer protective cover, and a support is arranged in the outer protective cover. The support comprises a connecting plate and an annular buckle, a plurality of first supporting rods which are obliquely arranged are arranged on the connecting plate at intervals in the annular direction of the connecting plate, the first supporting rods are hinged to the annular buckle through second supporting rods, the annular buckle is used for being connected to a quinoa main stem in a clamped mode, and the support is used for being detachably installed on the quinoa main stem; the outer protective cover covers the periphery of the support under the action of elasticity so as to protect the ears, prevent the outer protective cover from deforming to knock off flowers, effectively prevent external pollen from entering, prevent hybridization from affecting self-pollination of the quinoa, and guarantee high purification of grains.

This invention discloses a method for measuring cavitation in plant xylem, comprising: calculating image parallax in an image sample set and recovering scene depth information; extracting the center line of the main stem based on the segmentation results of the main stem; determining the two-dimensional pixel coordinates of the target vibration measurement point above the plant roots along the direction of the center line of the main stem; and calculating the three-dimensional spatial position of the target vibration measurement point by combining the scene depth information corresponding to the target vibration measurement point; automatically coarsely aligning the target vibration measurement point above the plant roots; obtaining the optimal alignment posture of the laser Doppler vibrometer; collecting vibration signals from the target vibration measurement point above the plant roots; and measuring the cavitation in the plant xylem using the collected vibration signals. This invention addresses the problems of manual reliance, low efficiency, poor repeatability, and unstable signal quality caused by on-site interference in existing technologies for measurement point identification and LDV alignment, and achieves automatic positioning, automatic alignment, and cavitation event measurement of the position above the plant roots.

The present invention belongs to the technical field of sea cucumber breeding, and specifically relates to a longline sea cucumber breeding facility and a breeding method thereof, comprising an anchor stone, an A-type counterweight, a B-type counterweight, a position buoy, a small float, a breeding cage, and a main stem rope. The anchor stone is fixedly connected to the main stem rope through a mounting ring, the A-type counterweight block and the B-type counterweight block are connected in series to the surface of the main stem rope, the position buoy is connected in series to the surface of the main stem rope, the breeding cage is connected in series to the surface of the main stem rope, and the small float is fixedly connected to the surface of the breeding cage. The position buoy is a large-volume buoy with a single buoyancy greater than 100 kg. By utilizing the law that waves decay exponentially with increasing water depth, the longline abalone breeding system set in the bottom waters can greatly improve its typhoon resistance, can be safely produced in the sea area outside the bay, greatly improve the breeding survival rate, and improve the quality of the breeding objects. The breeding cage adopts a suspended arrangement form, which can avoid being damaged by bottom mud and gravel, thereby improving survival ability.

The invention discloses a river main stream ecological water demand estimation method based on big data processing, and relates to the field of data processing, and the method comprises the following steps: obtaining real-time monitoring data and historical monitoring data of a corresponding river main stream, and constructing a virtual ecological image; setting a plurality of river segment sequences based on the virtual ecological image and historical monitoring data; constructing a water demand evaluation decision chart according to the data having influence on water demand estimation under different data types and different states in each river segment sequence; obtaining water demand estimation decision data corresponding to the corresponding river segment sequence according to the real-time monitoring data and a water demand evaluation decision chart; according to the water demand estimation decision data and the corresponding real-time data information, performing estimation processing on each river segment sequence to obtain sequence estimation water demand data; obtaining river main stream water demand estimation data according to the sequence estimation water demand data corresponding to each river segment sequence; according to the invention, the accuracy of water demand estimation is improved.

The invention discloses a water delivery arrangement system, particularly discloses a water delivery arrangement system for relieving low-temperature water drainage, and belongs to the technical field of design and construction of water conservancy and hydropower engineering structures. According to the water delivery arrangement system for relieving low-temperature water drainage, the excavation work amount is remarkably reduced, and it can be effectively ensured that water with the relatively high temperature and the relatively sufficient flow can be taken at any time. The water conveying arrangement system comprises a water storage reservoir which is arranged on a main stream river channel through a river blocking dam, and is characterized by further comprising a branch ditch river channel, a water conveying pipeline and a water inlet tower arranged at the input end of the water conveying pipeline, the branch ditch river channel is communicated with the water storage reservoir, and the water inlet tower is arranged on the branch ditch river channel; the river bottom elevation of the branch ditch river channel is higher than the riverbed elevation at the corresponding position of the main stream river channel and lower than the dead water level elevation of the reservoir; in the water taking process, the water inlet tower obtains stored water in the reservoir area of the water storage reservoir layer by layer from top to bottom through the branch ditch river channel.

The application discloses a kind of based on self-vibration effect's breaking down gate sand diversion wall structure, the branch stream side of dry flow and branch stream confluence has gate sand area, along the transverse extension of branch stream is used to guide water wall of high water level, guide water wall is set in gate sand area upstream;The middle part of guide water wall is equipped with gate, gate is installed in gate, and the guide water wall of gate extends downstream direction and is equipped with water retaining wall, water retaining wall extends into gate sand area, and water retaining wall includes left side wall and right side wall that are symmetrically arranged, left side wall and right side wall are all ladder-shaped, and the left side wall and right side wall are surrounded to be used to flush sand harmonic cavity for water retaining and flushing, and the downstream of flush sand harmonic cavity is narrower than upstream.The application also discloses corresponding use method.The application utilizes the structure of the application when breaking down gate sand, forms as intense resonance phenomenon as possible by artificial control height difference, and the breaking down efficiency and effect of gate sand are improved by corresponding water flow phenomenon.