274 results about "Runoff volume" patented technology

The embodiment of the invention discloses a flood forecasting method and system based on historical data to solve a problem of low flood forecasting precision and accuracy. The method comprises the following steps: analyzing the GIS (Geographic Information System) data and the DEM (Digital Elevation Model) data of a forecasting drainage basin, and dividing the forecasting drainage basin into various hydrologic units; carrying out rainfall comparison on historical meteorological hydrologic data under each hydrologic unit with corresponding practical meteorological hydrologic data, determining the historical meteorological hydrologic data matched with rainfall, and weighting with runoff volume obtained by analog computation to obtain a forecasting result of each hydrologic unit; if a certainty coefficient of the forecasting result of each hydrologic unit and the corresponding practical meteorological hydrologic data is greater than or equal to an effective threshold value, utilizing the rainfall capacity of each hydrologic unit and a parameter adopted by analog computation under each hydrologic unit to calculate the flood element of each hydrologic unit; and according to the flood element of each hydrologic unit, carrying out flood forecasting. Floor forecasting precision and accuracy can be improved.

The invention relates to a regulation and storage design and model verification method for mountain parks built on the basis of sponge city concept. The method comprises following steps: A. determining the annual runoff volume control rate of a mountain park; B. initially bringing up LID module control indexes according to the annual runoff volume control rate of a mountain park; C. calculating the regulation and storage volume of each LID module according to the LID module control indexes, adjusting the LID module control indexes so that the regulation and storage volume of gray regulation and storage devices is no more than a preset value and obtaining the regulation and storage volume of the LID module; D. module layout; E. model analysis. The method puts the idea of sponge city into practice comprehensively; the construction of mountain parks and the building of sponge city are integrated; the design method of constructing sponge parks is further fulfilled so as to realize natural accumulation, penetration and purification of rainwater by the mountain parks.

The invention relates to the technical field of rainwater collection and processing, and discloses a novel rainwater retention infiltration system. The novel rainwater retention infiltration system comprises a pre-processing tank and a retention infiltration tank, wherein the pre-processing tank is arranged at the outer side of the retention infiltration tank; the pre-processing tank and the retention infiltration tank are separated by virtue of a perforated partition board; gravels are kept in the pre-processing tank; the retention infiltration tank is sequentially provided with plants, a water storage layer, a coverage layer, a planting soil layer, a packing layer, an isolating layer and a gravel layer in a thickness direction; a drainage pipeline is arranged in the gravel layer of the retention infiltration tank; an overflow pipe is vertically arranged in the retention infiltration tank; one end of the overflow pipe communicates with the drainage pipeline and the other end is exposed out of the retention infiltration tank; and a reoxygenation pipe is arranged in the packing layer. With the application of the system provided by the invention, stormwater runoff pollution load can be effectively reduced, rainwater runoff volume and peak can be diminished and the problem that the system gets blocked can be effectively prevented; and the system is simple in structure, low in maintenance cost, simple and feasible in implementation and broad in application scope.

The invention discloses an environment-friendly road gully, which comprises a rain grate and an inner space under a roadway. A filter basket is arranged under the rain grate. The rainwater runoff enters the filter basket under the rain grate after being preliminarily intercepted of larger filth by the rain grate and enters the inner space after being filtered by the filter basket. The inner space is divided into two parts, a larger one and a smaller one. The larger space therein is a closure space and the smaller space therein is an overflow space, the both of which are separated by an overflow weir. When the runoff volume is smaller than the runoff volume in the early period, the rainwater is fully intercepted in the gully, percolated into the surrounding soil through a permeable facility at the bottom and naturally emptied. When the runoff volume is larger than the runoff volume in the early period, the runoff in the later period overflows into a overflow space at the end through the overflow weir and discharges downstream through pipes. In combination of grating filtering, interception of the runoff in the early period and removing automatically, and interception of flotage, the gully not only intercepts most contamination in the ground runoff, but also guarantees smooth collection and discharge of the rainwater, which has remarkable ecological environment, economic and social benefits.

An artificial rainfall runoff and soil water motion simulation experimental system comprises a rainer, a runoff and soil water forming device, a water drainage device and a runoff volume measuring device. The rainer comprises a water supply device and a raindrop forming device; the water supply device adjusts water outlet strength by an adjusting valve and a flow meter; the raindrop forming device is a group of pipes with holes; the runoff and soil water forming device is a vertical container with a soil layer; the group of pipes with holes is arranged on the top of the vertical container and can be adjusted in a lifting manner; and the container comprises an inner wall on the inner layer and an outer wall on the outer layer, the inner wall consists of a water permeable steel wire gauze, the outer wall is made of a transparent material, the inner wall and the outer wall are connected with each other by a water impermeable layering steel plate, the water drainage device is arranged below the soil layer, a water leading pipe which is connected with the runoff volume measuring device is arranged outside the container, and the runoff volume measuring device performs data processing and operation by a computer. The artificial rainfall runoff and soil water motion simulation experimental system is convenient to carry, high in experimental efficiency, accurate and fast in operation and high in adaptability.

The invention relates to an ecological road shock resistance rainwater utilization system. The ecological road shock resistance rainwater utilization system is characterized in that the ecological road shock resistance rainwater utilization system is arranged on an open space or greenbelt land on the side of a road, and comprises rainwater inlets, abandon flow grooves, a low elevation greenbelt, initial rainwater storage processing wet land, an overflow well, a rainwater tank, a rainwater utilization structure and a draining well, wherein grids are arranged in the rainwater inlets, volume spaces are arranged inside the rainwater inlets, and are used for remaining rainwater for a short time and serving as grit chambers, the rainwater inlets are communicated with the abandon flow grooves through rainwater pipes, overflow openings are formed in the tops of the abandon flow grooves, the abandon flow grooves are communicated with the initial rainwater storage processing wet land through abandon flow pipes, the low elevation greenbelt is lower than a road surface, a permeable backfill layer is arranged on the lower portion of the low elevation greenbelt, the initial rainwater storage processing wet land comprises an initial rainwater storage pool and processing wet land, and a partition wall with water distribution holes is arranged between the initial rainwater storage pool and the processing wet land. The ecological road shock resistance rainwater utilization system plays a role in rainwater discharge reduction and slow discharge, reduces city rainfall flood runoff volume, reduces probability of occurrence of city rainfall flood disasters, and meanwhile can effectively control construction scales of downstream drainage systems, has an excellent eco-environment protection effect, and provides a new way to solve the problem of city water shortage.

The invention discloses a refined-grid waterlogging forecasting method. The method comprises: S1, grid division is carried out on an urban area by using a divided pipenetwork drainage area as a unit and an underlying surface type as a basis; S2, an SCS model is established if the grid area includes a drainage basin, and an SWMM model is established if no riverway drainage basin exists in the gridarea; and S3, a runoff volume of the grid area and a runoff volume of an overflowing node under the current rainstorm weather in city are calculated respectively based on the SCS model and the SWMM model, the overflowing data as parameters are inputted into an LISFLOOD-FP model to simulate a flooding range, a water depth, and a flooding process of the city. According to the method disclosed by theinvention, the urban area is divided into a plurality of grids and calculation is carried out by selecting different models, so that the accuracy of water accumulating forecasting is improved.

The invention discloses a pure remote sensing data driven drainage basin water circulation simulation method, comprising the following steps: building a drainage basin water circulation simulation framework including a vegetation interception and evapotranspiration process, a runoff production process and a runoff concentration process and compatible with spatial information; completing the simulation of drainage basin runoff production and concentration processes entirely based on remote sensing data, and getting the background values of total runoff yield and runoff volume of any grid point in a drainage basin; and adding a model parameter self-optimization module, constructing an objective function, carrying out random sampling to generate a simulation parameter sample combination to be calibrated, introducing a model for iterative operation, and determining eligible drainage basin water circulation simulation parameters and runoff production and concentration simulation results. The dependence on the observation data of a traditional meteorological site is reduced effectively, the spatio-temporal continuity and spatial heterogeneity of water circulation are better reflected, and the physical mechanism and multi-source data compatibility of the method are enhanced.

The invention discloses a linear reservoir retention confluence and nested watershed (multiple sub watersheds) confluence method. The method includes collecting long series data of rainfall capacity, evaporation capacity and runoff volume of a researched watershed; calculating a runoff generation process according to the rainfall capacity, the evaporation capacity and the runoff volume by a hydrological model; taking a confluence path in the watershed as N linear reservoirs in series connection by the Nash linear reservoir method to acquire a Nash instant unit hydrograph, wherein the previous water reservoir becomes an inflow of the next water reservoir; introducing a retention factor alpha to describe the water-holding capacity of the linear water reservoirs; simulating the Nash instant unit hydrograph by a binomial to improve a confluence method of the hydrological model. The advantage that the instant unit hydrograph describes the watershed confluence process in terms of time and space is kept, and the complex parameter problems in application are avoided, so that the method is applicable to hydrological simulation of large watersheds, and particularly, has significant practical value in research on water circulation of the watersheds under climate change. The method is simple and convenient to apply, and simulation results given by the method are objective, scientific and high in accuracy.

The invention discloses a prediction method and device of the day runoff volume of a snowmelt period. The method comprises the steps that the variable data and the measuring parameter data of an n day snowmelt zone drainage basin in the current snowmelt period are obtained; the water-recession coefficient kn + 1 of an n + 1 day snowmelt zone drainage basin in the current snowmelt period is obtained; according to the variable data and the measuring parameter data of the n day snowmelt zone drainage basin and the water-recession coefficient kn + 1 of an n + 1 day snowmelt zone drainage basin, the water amount of snowmelt and rainfall in a drainage basin area A of the n + 1 day snowmelt zone drainage basin and the water-recession flow of river channel runoff in the drainage basin are computed; and the water amount of snowmelt and rainfall in the drainage basin area A of the n + 1 day snowmelt zone drainage basin and the water-recession flow of the river channel runoff in the drainage basin are combined, and the day runoff volume of the n + 1 day snowmelt zone drainage basin in the current snowmelt period is obtained by computing. According to the method and the device, the accuracy and the integrity of prediction of the day runoff volume of the snowmelt period can be improved.

The invention provides a device for real-time automatic measurement of runoff mud and sand and a measurement method, wherein a measurement scale is installed inside a support shell body; a sampler is installed on the measurement scale; the top end of the sampler is separated from a sample inlet hole; a sample discharge hole is disposed in the bottom end of the sampler; an overflow hole used to calibrate a volume of the sampler is also disposed in the outer side wall of the sampler; a sample inlet valve is installed on the sample inlet hole; the sample inlet valve controls electric motor driving by the sample inlet valve; a sample discharge valve is installed on the sample discharge hole; the sample discharge valve controls the electric motor driving by the sample discharge valve; a first fluid sensor is installed in the sample inlet hole; a second fluid sensor is installed in the overflow hole; and a PLC controller controls the whole measurement device to complete self-starting, self-dormancy and automatic repeated measurement. The measurement device provided by the invention has the advantages that a runoff volume and a content of the mud and the sand in an outdoor runoff small area or at a drainage basin runoff station can be measured automatically and continuously in real time; and labor force consumption of the manual measurement can be reduced. The measurement device and the measurement method provided by the invention can ensure accuracy of measurement results.

The invention provides a greenbelt structure integrating rainwater storage and utilization in the technical field of sponge city building.The greenbelt structure comprises a vegetation layer, a planting soil layer and a water storage layer which are sequentially arranged from top to bottom.A separating layer is arranged between the planting soil layer and the water storage layer.A rainwater permeating and drainage facility is arranged in the greenbelt structure and comprises a gravel buffering area and a water drainage pipe, wherein the gravel buffering area penetrates through the greenbelt structure from top to bottom, and the water drainage pipe is arranged in the gravel buffering area.An overflowing area is arranged on the upper portion of the water drainage pipe and sleeved with a protecting hood.Rainwater can be directly absorbed and stored in the water storage layer of the lower layer of the greenbelt structure, the rainwater runoff volume generated by rainfall of rainstorms and above can be reduced, pressure of a municipal drainage network is effectively relieved, the stored rainwater can be directly utilized for growth of green plants, and the irrigation needs of the green plants are effectively reduced.

The invention discloses a river network modeling method which is used for analyzing and researching the river network by means of the complex network theory, and belongs to the technical field of hydrology. The modeling method abstracts the object river network into a directed network model and includes steps of defining evident changes of hydraulic characteristics of rivers in the object river network as nodes of the directed network model; defining riverways where river water flows through among the nodes as edges of the directed network model and defining flow direction of the river water as directions of the edges. The river network modeling method further quantitatively analyzes importance of the nodes and the edges in the river network according to the hydraulic characteristics such as the length of the riverways and runoff volume. Compared with existing normal hydrological models, the river network modeling method can well reflect real topological property of the river network and integrally analyzes and researches the real river network, importance of the nodes and the edges in the river network can be analyzed, and great significance in flood fighting, disaster relief, water resource protection and hydrological analysis and research and the like is achieved.

The invention discloses an LID (low impact development) type rainwater ditch and a design and calculation method for the same, and is applicable to various rainwater drainage ditches such as drainage ditches, farmland drainage ditches and floodwater drainage ditches on two sides of a slope and two sides of a road. The rainwater ditch comprises a ditch, storage dams, overflow ports, a rubble layer, a sandy soil layer, ecological slopes and the like. The sandy soil layer is laid on a bed of the ditch, the rubble layer is laid on the upper side of the sandy soil layer, and the storage dams are longitudinally continuously arranged along the ditch and are separated from one another by a certain distance, so that a series of reservoirs which are continuously distributed are formed along the ditch. The design and calculation method includes designing and calculating layout spacing of the water storage dams and the sizes of the overflow ports. The LID type rainwater ditch and the design and calculation method have the advantages that the LID type rainwater ditch has multiple functions of 'drainage, water storage, infiltration and decontamination', and is incomparable to a hard rainwater ditch only with a drainage function; the LID type rainwater ditch is high in water storage capacity and drainage speed which are deficient in a wetland bed type rainwater ditch; the rainfall flood runoff volume can be obviously reduced, the groundwater recharge can be improved, non-point surface pollutants of rainwater can be reduced, and environments can be beautified.

The invention discloses a measuring method and an implementation device for a slope surface runoff and comprises a terminal processing unit connected to each unit and used for collecting data information of each unit; a slope surface water collecting unit arranged on the earth' surface of the slope surface and used for collecting rainfall on a slope surface; a flow detection unit connected to a slope surface detection unit and used for measuring the water quantity of the collected rainwater at real time; a water storage measurement unit connected to the flow detection unit and used for measuring the water quantity of the collected rainwater at real time. The invention has the advantages of simple structure, convenience in use and strong stability of the device. Due to the adoption of a double measurement structure, so that measurement accuracy is greatly improved, a wireless transmission module is provided in the device, and a measurement result can be transmitted remotely, and a real-time performance is greatly improved. Two electromagnetic valves are provided for the invention, so that safe and stable operations of a system can be guaranteed.

The present invention relates to water conservancy engineering, especially the tackling of seasonal riberbed and river course. The present invention is characterized by that subsiding stepped water accumulating river with subsiding dams is constructed without changing the cross section area and flood discharging runoff and the water accumulating riverbed is lowered gradually from the upstream to the downstream. The stepped water accumulating riverbed makes it possible to utilize water comprehensively for beautifying environment, preventing riverbed desertification, regulating air humidity, maintaining ecological balance and safety discharge flood.

The invention discloses a mountain area river ecological runoff calculating and application method, and solves the problems that mountain area small and medium river annual rainfall distribution is not even, water inflow in a dry season is insufficient, and limited ecological runoff cannot satisfy wide and shallow riverbed full coverage and current continuity; the method comprises the following steps: using a Tennant method to calculate the minimum ecological runoff volume that satisfies the riverbed ecology system basic demands, wherein the minimum ecology flow cannot cover the whole riverbed and form certain depth in a non-flood season; using the minimum ecology flow as the design flow, and using a manning formula to calculate to-be-drilled width and depth of the main channel riverbed; drilling down the riverbed in the main channel of the riverbed according to the calculated width and depth. Engineering measures can narrow and deepen the riverbed, so limited ecological runoff can flow along the riverbed center in the non-flood season, thus preventing riverbed cutoff, ensuring river water body continuity, ensuring riverbed ecology flow, and satisfying mountain area river aquatic biology survival and multiplying basic demands.

The invention discloses a catchment area critical rainfall calculating method based on a DEM. The method comprises the steps that a waterlogging minimum point hmin of a catchment area is firstly acquired, an elevation value of the waterlogging minimum point is added to a maximum value delta h of the waterlogging depth to obtain a waterlogging elevation value of the catchment area, a height difference delta h obtained by subtracting the waterlogging elevation value from an original DEM diagram layer serves as a waterlogging depth value of each grid, the grid waterlogging depth delta h is added to the average drainage capability d of the catchment area to obtain the runoff volume q of the grid, and the runoff volume q of all the grids is accumulated to obtain the total sum of the runoff volume of the catchment area; the ratio of the total runoff volume to a runoff coefficient alpha serves as the total rainfall of the catchment area; the total rainfall is divided by the area of the whole catchment area to obtain the unit area rainfall, that is, the catchment area critical rainfall generated when the waterlogging depth is delta h. According to the method, personal errors generated when the waterlogging depth is manually collected for regression analysis in the past are omitted, so that a calculating result is more scientific and reasonable.

The invention provides a seasonal design flow computing method for river-type water functional areas. The seasonal design flow computing method comprises the steps of establishing a distributed hydrological model and simulating and verifying the watershed hydrological processes of the river-type water functional area to be studied, establishing the corresponding relation of each river-type water functional area to be studied to each sub-watershed inside the distributed hydrological model, outputting the long series monthly runoff volume simulation results of each sub-watershed of a section under each river-type water functional area to be studied according to the corresponding relation, selecting the long series runoff volume simulation results of corresponding months of each river-type water functional area to be studied according to the design flow accounting rule of the river-type water functional areas to be studied according to the corresponding relation, ranking and selecting the flow having a certain assurance rate as the design flow of the river-type water functional areas to be studied. The seasonal design flow computing method for the river-type water functional areas is capable of checking the design flow of the water functional areas in each period by selecting different time periods (such as dry season, normal river flow period and flood season), and then capable of supporting delicacy management of the water functional areas.

The invention relates to a sponge city rainwater collection reuse system of a residential area. The sponge city rainwater collection reuse system comprises a source processing system, a process transmission system and an end collection reuse system. The source processing system is used for collecting partial rainwater within a designed rainfall, retaining pollutant in rainwater runoff on green areas, roofs and roads in the residential area, simultaneously reducing the total runoff volume, and complementing underground water. The process transmission system enables another part of rainwater within the designed rainfall to enter residential area pipe network through ecological facilities, overflow ports of the pavement and overflow pipes, and to enter the end collection reuse system. The end collection reuse system is used for lifting and reusing the processed rainwater, the rainwater exceeding the designed rainfall is overflowed to a downstream municipal pipe network through a shunting system. The rainwater collection reuse system is low in cost and has high environmental benefits and ecological benefits, the source is controlled and the process is optimized, a series of collection reuse sponge city low impact development rainwater utilization system technologies are provided, and the purposes of waterlogging prevention, decontamination and rainwater resource re-utilization are achieved.

The invention discloses a method for measuring a drought degree of a water diversion irrigation region. The method comprises the following steps: obtaining a local historical precipitation amount of an irrigation region and historical runoff volume of available supplied irrigation water; determining a local accumulative precipitation amount of the irrigation region and accumulative runoff volume of the available supplied irrigation water; fitting probability distributions of the accumulative precipitation amount and the accumulative runoff volume respectively; determining a joint probability distribution function of the accumulative precipitation amount and the accumulative runoff volume; and based on a single-variable probability distribution function and a double-variable probability distribution function of accumulative precipitation and accumulative runoff, converting a corresponding accumulative probability into a corresponding quantile of standard normal distribution according to a wetness-dryness encountering condition of the accumulative precipitation and the accumulative runoff, and setting the quantile as a hydrologic-meteorological comprehensive drought index value, thereby realizing the measurement of the drought situation of the water diversion irrigation region. The method and the index provided by the invention can comprehensively reflect comprehensive influence of the local precipitation of the irrigation region and the available supplied irrigation water of the irrigation region on the drought of the irrigation region, so that the method can be widely applied to drought measurement, drought monitoring and forecasting of the water diversion irrigation region.

The invention discloses a combined system pipe network intercepting well system and a control method thereof. The system comprises a well body and a control unit, wherein an early rain overflow weir, a slag stop pontoon and a multi-stage adjustable overflow plate are arranged on a flow channel of the well body from left to right in sequence; a sewage intercepting pipe is arranged on the bottom part of the side wall of the well body between a rain and sewage combined water inlet pipe and the early rain overflow weir; an early rain intercepting pipe is arranged on the bottom part of the side wall of the well body between the early rain overflow weir and the multi-stage adjustable overflow plate; an electric intercepting check valve is arranged on each of the sewage intercepting pipe and the early rain intercepting pipe; a liquid sensor is arranged in the well body on the left side of the early rain overflow weir; a rainfall sensor is arranged out of the well body. According to the control method, the early rain range is exactly defined from the perspective of early rainwater runoff volume; the control unit controls the opening and the closing of the electric intercepting check valves on the sewage intercepting pipe and the early rain intercepting pipe by utilizing a liquid level signal and a rainfall signal, so that precise intercepting of early rain is effectively realized in a combined system pipe network intercepting well.

The invention belongs to the technical field of power systems and automation thereof, and relates to a micro-grid medium and small hydropower station abandoned water electric quantity calculation method considering runoff volume. The invention is directed to the uncertainty of the inflow flow of the small hydropower station, the wind speed of the wind farm, and the sunshine intensity of the photovoltaic power station. The probability analysis method is used to calculate the initial flow value of the small hydropower station, the wind farm, the wind farm, the wind farm speed, and the solar farm's sunshine intensity according to the normal distribution law. Considering the limitation of the voltage variation in the microgrid and the microgrid accessing the distribution network, the installedcapacity is reduced according to the proportion of the initial installed capacity of small hydropower stations, wind farms and photovoltaic power stations. The expected goal is to achieve new energyutilization. The power generation efficiency, the utilization rate of power generation equipment, and the annual utilization hours of power generation equipment are maximized, and the amount of powergeneration in the operating cycles of day, month, year, and years is increased.

The invention provides a cascade power generation and ecological balance optimization scheduling method and device, equipment and a medium. The method comprises the following steps: obtaining the annual runoff change of a river of the cascade hydropower station, calculating the ecological flow of the cascade hydropower station by adopting a ten-day-by-ten-day frequency method, and determining theupper and lower limits of the ecological suitable flow and the minimum and maximum ecological flows of the cascade hydropower station; setting an objective function and constraint conditions to establish a power generation and ecological balance optimization scheduling model; and optimizing a scheduling result according to the power generation and ecological balance optimization scheduling model based on an improved whale algorithm. The method can achieve organic unification of economic benefits and ecological benefits of the cascade power station, find out the optimal balance point of the power generation benefits and the ecological benefits, and effectively improve the ecological flow environment of the riverway under the stress of water conservancy projects. By changing the hydropower station scheduling mode, the water requirement of the river ecosystem is met to the maximum extent, the natural runoff mode of the river channel is well maintained, and the influence of human power generation requirements on river ecology is reduced.

The invention belongs to the technical field of water resource management, and particularly relates to a method for process adjustment and risk identification of operation of a water resource system of Internet of water. The method is characterized in that irrigation water demand information is provided for a regional multi-water-resource optimization allocation model based on real-time perceptual information, and real-time water demand is determined by a real-time water distribution decision-making model; a medium and long term runoff forecasting model is used for forecasting the runoff volume of a drainage basin in the future month by month; a downscaling climate model is used for providing input for a short and medium term hydrologic forecasting model; an underground water simulation forecasting model is used for regulating the level of underground water; a coupled forecasting multi-water-resource optimal dispatching model is combined with all the information to achieve combined dispatching of multiple water resources; a multi-water-resource dispatching model provides a day-by-day runoff water distribution decision, and water flow transportation is achieved through a water resource transportation automatic control unit so that precise distribution can be achieved. The method can be widely applied to drainage basin (region) water resource management, especially efficient utilization of water resources in irrigated areas. Implementation steps are clear, and projects are easy to realize.

The invention provides a medium-and-long term runoff ensemble forecasting method, and belongs to the field of hydrological forecasting. The method comprises the following steps: firstly, respectivelyacquiring historical runoff data of a forecast object, acquiring historical meteorological data as a local correlation factor, and acquiring climate factor data as a remote correlation factor; takingthe runoff data of the first 11 months of the month to be forecasted as a time sequence autocorrelation factor; selecting the factor with the highest correlation coefficient from all the factors to form a forecasting factor set; and inputting the forecasting factor set data corresponding to the month to be forecasted into the model by utilizing the trained and verified machine learning runoff forecasting model to obtain a forecasting value of the runoff volume of the month. The method can be practically applied to month-by-month runoff calculation of hydrological station data missing regions and station sparse regions, can also be used for interpolation of missing runoff data, and provides an effective reference basis for local water resource distribution and management, especially arid region reservoir scheduling, local irrigation planning, agricultural water management and the like.

The invention discloses a method for preparing production, living and ecological water for an inland river basin in an arid area. The method comprises the following steps of calculating the basic ecological environment water demand of the river, the areas of different ecological protection ranges, the vegetation ecological water demand of different ecological protection ranges, the water demand of different river target ecological environments, the analysis of the river runoff volume on the river target ecological environment water demand and the optimal configuration of the production and living ecological water. On the premise of meeting the total water consumption of the river basin production and domestic surface water, whether the remaining water amount in the past year can meet the basic ecological environment water demand and river loss of a river and the target ecological environment water demand of the river is determined, a scheme of mutually coordinating the production, living and ecological water of the inland river basin in the arid area is provided, and the reasonable configuration and efficient utilization of the water resources are achieved.

The invention relates to the field of rainwater treatment, and discloses a combined device for treating road runoff rainwater. The combined device comprises a first water tank, a guide chamber and a second water tank. The guide chamber is arranged between the first water tank and the second water tank. A perforated plate is arranged at the upper end of the guide chamber. A micro wet-land unit is arranged on the upper side of the guide chamber. A rainwater strainer is arranged at the top of each of the first water tank and the second water tank. Cobblestones are piled on the rainwater strainers. A mud guard and a guide plate are arranged in the first water tank. A mud collection groove is formed in the bottom of the first water tank. The mud guard is arranged on one side of the mud collection groove and inclines toward one side of the guide chamber. A water outlet is formed in the wall of the second water tank. A water outlet pipe is arranged on the wall, opposite to the water outlet, of the second water tank and is used for being connected with a municipal rainwater pipeline. The combined device has the advantages that discharge of runoff rainwater pollutants can be reduced and runoff volume and runoff peak can be decreased.