165 results about "Catchment area" patented technology

The invention discloses an analysis and evaluation method for inrush mountain torrent disasters of regions without data, and relates to the field of mountain torrent disaster analysis and evaluation. The method comprises the steps that the basic information of a project area is obtained; the landform, the river position form and the flood control current situation of an evaluated object are obtained; the catchment area and runoff components of the dike confluence drainage basin of each small watershed in the obtained evaluated object are determined; rainstorm parameter calculation, rainstorm calculation and concentration-time-based rainstorm time interval distribution of the evaluated object are obtained; flood calculation is designed, and the water level and flow relation of a riverway section, prone to inrush, of the evaluated object is obtained; the riverway flood control current situation in the evaluated object is determined, and accordingly danger zone grade division is conducted; and an early warning point is established, the early warning water level of the analyzed and evaluated object is determined, and the early warning index of the analyzed and evaluated object is formulated. According to the analysis and evaluation method, the inrush mountain torrents serves as the main analyzed and evaluated object, and a current riverway flood control current situation evaluation method and an early warning index analysis method are provided.

The invention discloses a method of implementing an automatic control and storage device used for collection of natural rainwater or rainfall runoff, relating to the fields of environmental protection and water supply and drainage work. According to the invention, by a single-chip microcomputer control device, parameters such as rainfall, rainfall time or flow are taken as trigger conditions, rainwater of different characteristic stages in a rainwater collector can be stored into different independent sampling bottles by automatic control. The rainwater collector is connected with a submersible pump to collect the rainfall runoff, and also connected with a rainwater receiving funnel to collect the natural rainwater. A distributor on the rainwater collector can automatically fill the rainwater in the rainwater collector. The device has the characteristics that firstly, the device is suitable for the fields and occasions without an alternating current power source, remote transmission of data can be automatically controlled, and a possibility of unattended automatic collection of rainwater sample in the fields at night can be achieved; secondly, the rainwater of different stages can be automatically collected according to the given rainfall or time, and the device is suitable for monitoring the change of water quality of the rainwater along with factors such as rainfall and time; thirdly, rainwater under various conditions such as natural rainwater and rainfall runoff at different catchment areas can be collected.

The invention discloses a method for treating nitrogen and phosphorus surface source pollutants in an ecological ditch. The method comprises the following steps of: A, constructing the ecological ditch: constructing the ecological ditch at the exit of a catchment area, and dividing the ecological ditch into multiple steps, wherein the slope and the bottom of the ditch are made of soil, and a water blocking bank has a brick-concrete structure; B, planting aquatic plants and breeding loaches section by section: planting the aquatic plants in the ecological ditch to digest the nitrogen and phosphorus surface source pollutants in a water body by using the intercepting and absorbing effect of the aquatic plants, and breeding the loaches on the lower middle part of the ecological ditch to increase economic benefits of the ecological ditch; C, managing the ecological ditch: periodically reaping the aquatic plants, dredging the ecological ditch in combination with harvesting of the loaches, and newly planting aquatic plants and breeding loaches; and D, managing and maintaining the ecological ditch: 1) reaping and utilizing the plants in the ditch, 2) dredging, and 3) maintaining the ecological ditch. The method is low in cost and easy to operate, is easily accepted by crowds, has an extremely good treatment effect on the nitrogen and phosphorus surface source pollutants, and has a very good popularization and application prospect in subtropical hilly regions of middle and lower reaches of the Yangtze River.

A computer implemented method for optimizing automobile dealer inventory includes determining at least one future purchase intention metric for a catchment area in which a dealer is located, determining expected future retail sales of a vehicle type based on the determined future purchase intention metric, comparing the expected future retail sales of the vehicle type to an expected inventory of the vehicle type for at least one time period, and outputting a recommended adjustment to at least one of a current inventory of the vehicle type and an on-order inventory of the vehicle type, thereby ensuring that a more desirable stock level is maintained for the at least one time period.

The invention discloses a water storage and intelligent irrigation device in a garden. A reservoir (1) is arranged in a rainwater catchment area in the garden, a water pump (5) is arranged in the reservoir (1), a water inlet pipe of the water pump (5) is arranged in the reservoir (1), a water outlet pipe is connected to a garden drip intelligent system, the water pump (5) is provided with a start-stop control chip (6), and the start-stop control chip (6) is connected to a humidity detection probe (7) connected within the garden. According to the water storage and intelligent irrigation device in the garden, the reservoir is arranged in the sloping rainwater catchment area in the garden, the water pump for irrigation is connected within the reservoir, the start-stop control chip is arranged on the water pump, and the start-stop control chip is connected to the humidity detection probe connected within the garden, so that the control chip can control the water pump to work to achieve intelligent irrigation when a moisture signal detected by the humidity detection probe is lower than a limit value of the start-stop control chip. The reservoir is arranged for garden irrigation with rainwater to achieve the purposes of water conservation and consumption reduction.

The invention provides a method and a device for implementing primary rainwater closure in a municipal network system. In the method, primary closure rainwater at each rainwater port in a water catchment area is taken as an object, and a floating ball control chamber and a main flow-splitting chamber are arranged on two sides of the rainwater port. When a rainfall runoff is formed, heavily-polluted primary surface chemical runoff is subjected to quantitative closure to the municipal sewage pipe network by using the difference between the two chambers and a rainwater inspection well in vertical elevation. A floating ball control valve is arranged at a primary rainwater inlet of the main flow-splitting chamber; the floating ball water level in the floating ball control chamber controls the opening and closing of the floating ball control valve; the flow-splitting effluent flows into the municipal sewage inspection well in the neighborhood; and the split flow can be realized by the effective volume of the floating ball control chamber and the opening and closing of the floating ball water level control valve. By integrally arranging the primary rainwater closure and the rainwater port, inspection well and other closure devices in the municipal network system, the method and the device can effectively realize the closure control of the primary polluted rainwater under various working conditions of actual rainfall.

The invention belongs to the technical field of municipal engineering, and discloses a method for establishing a simplified hydraulic model of an urban downward-concave overpass area under different rainstorm situations. The method comprises the steps that the catchment range of a high-catchment area and a low-catchment area of the urban downward-concave overpass area and a high-precision DEM are determined to serve as earth surface elevation input conditions of the model; the input of a model pipe network is simplified through the rainfall loss form; the waterlogging disaster situation in the urban downward-concave overpass area under the different rainstorm situations is simulated through the computer hydraulic model; an improvement implement scheme is determined according to a model calculation result. The method for establishing the simplified hydraulic model of the urban downward-concave overpass area under the different rainstorm situations is stated, the waterlogging disaster situation in the urban downward-concave overpass area under the different rainstorm situations can be simulated, and a current overpass area designing scheme can be assessed. According to the method, it makes possible that the reason for ponding of a downward-concave overpass is analyzed through the hydraulic model, and a theoretical basis is provided for improving and planning the downward-concave overpass.

A hydroplaning device for a rider to perform liquid sport athletic maneuvers, which comprises a support member having a height relative to the ground and a slope; a surface member disposed on the support member, wherein the surface member forms at least an angled surface and a catchment area. The device also comprises a liquid circulation system, having a liquid source, at least one feed line and at least one return line with the liquid source being in fluid communication with the at least one feed line and the at least one return line being in fluid communication with at least one of the liquid source and a disposal location. The device includes at least one liquid dispenser disposed adjacent to the support member or the surface member.

The invention discloses a rainwater storage system for avoiding urban inland inundation, haze and heat island effects. A community is used as a unit, the rainwater storage system comprises an open-air greening system, a plurality of ecological filter pools, one or two landscape impounding reservoirs and ecological grass groove systems, wherein the open-air greening system is built on a roof of a building, the ecological filter pools are arranged on the periphery of the building, and the ecological grass groove systems are arranged near a community park, square and road. The rainwater storage system has the advantages that due to the fact that the greening system is arranged on the roof of the building, and a rainwater collection tank, the ecological filter pool, the ecological grass groove systems and the like are arranged on the ground, rainwater mainly infiltrates inwards and compensates for underwater, and the year-round rainfall runoff coefficient of a catchment area in the community is controlled within 0.12 to 0.15 and reaches the national park green space rainfall runoff coefficient design standard. The temperature difference is controlled within 1 DEG C to 3 DEG C, the urban community inland inundation, haze and heat island effects are thoroughly avoided, the landscape function is achieved, and the rainwater garden system is formed.

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 discloses an urban rainstorm waterlogging catchment area analysis method. The method comprises the steps of adopting an SMS surface water simulation system to conduct gridgeneration on any selected area to obtain a calculation area; obtaining DEM data of a to-be-studied area, assigning the roughness and the DEM data to a calculation area, and calculating the elevation of each grid; adding rainfall data into the calculation area, and calculating rainfall yield confluence of each grid by adopting a pre-loss and post-loss method; according to the rainfall yield confluence of each grid, calculating the water depth and the water flow speed of each grid by adopting a surface two-dimensional hydraulic model; calculating the side flow of the grid with the water depth data according to the water flow speed of the grid with the water depth data and the side length of the side of the grid through which the water flow speed passes; and selecting a grid with the water depth greater than a set threshold value as an analysis grid, and judging whether the analysis grid is a catchment area or not according to the water depth of the analysis grid, the water depth of the grid adjacent to the analysis grid and the side flow rate and direction of each grid edge.

The invention relates to the technical field of flood drainage of cities, in particular a flood drainage planning and designing method for non-plain cities, which comprises the following steps of: determining a city flood drainage planning recurrence interval according to the importance of a city and a city flood drainage catchment area; calculating a peak discharge of an inland river catchment; dividing the catchment area of the inland river into an upstream suburban area and a downstream urban area, respectively calculating an upstream peak discharge and a downstream urban area peak discharge, and adding the upstream peak discharge and the downstream urban area peak discharge to obtain an overall inland river catchment peak discharge; determining a city flood drainage scheme; determining a water surface profile of the inland river; and combining the flood draining planning with a city vertical planning and a draining planning, and when the water level of the inland river reaches the highest point, controlling a control elevation of the lowest point of the non-plain city to be not smaller than the water level elevation of the backwater of a rainwater draining system at the lowest point. The method has the advantages of contribution to discharging flood of the inland river of the non-plain city, and preventing the occurrence of inland inundation in the urban area.

The invention provides a sewage treatment system of an underflow type constructed wetland based on disadvantages of the prior art. The sewage treatment system adopts coke powder-steel slag as compound filler, and has the advantages of simple structure, convenient management, no easy blockage and good denitrification and dephosphorization effect, thereby enhancing the treatment effect of sewage of the constructed wetland and improving the quality of the secondary effluent of the urban sewage treatment plant. The system mainly comprises a water inlet pipe, a water distribution area, an underflow type constructed wetland tank body, a coke powder-steel slag compound filler bed, a catchment area, a water outlet pipe and the like, wherein the coke powder-steel slag compound filler bed arranged in the sewage treatment system of the underflow type constructed wetland is provided with a sand soil covering layer, coke powder, steel slag and gravels in sequence from top to bottom, aquatic plants which have high capability of sewage purification and are suitable for local environmental conditions are grown on the sand soil covering layer, and the bottom of the filler bed adopts an impermeable layer made of natural clay as a waterproof structure.

The invention discloses an urban rainstorm water accumulation assessment modeling method based on full space-time, and the method comprises the following steps: 1, obtaining DSM data containing surface information, employing a D8 algorithm to divide a water catchment area, and modifying the boundary of the water catchment area according to the connection and distribution conditions of a real pipenetwork, so as to obtain the divided water catchment area; 2, establishing a surface runoff production model, and calculating runoff production of each catchment area; Step 3, establishing a surface confluence model, and calculating confluence of each catchment area; And step 4, establishing a drainage experience model to carry out drainage calculation, and calculating the drainage capacity of each catchment area through the drainage experience model so as to obtain an urban inland inundation assessment result. The DSM is adopted to divide the urban catchment area, the influence of urban planning and construction on urban topography reconstruction can be well reflected, and the method is more practical; The problem that drainage calculation cannot be carried out due to lack of structural data of a drainage pipeline is solved, and the operation time of the model is remarkably shortened.

The invention relates to a battery with a degassing system and to a method for dissipating substances emerging from a battery, by which means the gases and electrolytes which result from chemical activity can be dissipated using simple means in this way, and battery cells are protected against damage. The invention provides that the battery with the degassing system comprises a base plate (22) and at least one cell module (12) which is arranged on the base plate (22) and has at least one battery cell (16), wherein the battery cell (16) has an upper face (34), which is provided with cell terminals (14), and a lower face (36), which is provided with at least one degassing opening (18), and the base plate (22) has at least one aperture to a catchment area at the location of the at least one degassing opening (18), wherein the lower face (36) is arranged opposite the upper face (34) and the lower face (36) is arranged below the upper face (34) in the direction of the force of gravity.

The invention discloses a method for calculating the performance evaluation index of sponge city based on the measured value of the plot. Firstly, the site vertical arrangement, the sponge facility arrangement and the rainwater control flow field inspection are carried out, and the concentration of the total suspended solids of the initial and later rainwater runoff and the actual soil permeability parameters are obtained through the on-site monitoring and the actual data collection. Rezoning catchment zones; the topological structure model between catchment area, sponge facility and drainagenode is established, and the effective catchment area, ineffective catchment area, permeability ratio, initial runoff total suspended solids concentration, later runoff total suspended solids concentration and soil permeability parameters are substituted into the rainfall-flood model software. The operation model obtains the annual runoff control quantity and the facility annual total suspended matter removal rate, and then calculates the annual runoff total amount control rate and the annual total suspended matter removal rate. The invention can ensure the accurate evaluation of the performance evaluation index of the land sponge city, and is beneficial to the improvement of the land sponge city.

The invention discloses a method for evaluating service value of an ecological system for abating non-point source pollution in a water environment. The method includes simulating the ranges of catchment areas by the aid of a model for evaluating the service quality of the ecological system for abating the non-point source pollution in the water environment on the basis of ArcGIS9.2 hydrological analysis tool sets and water and pollutant solute and sediment conjugation migration theories, and defining service providers and service objects; combining output coefficients of certain pollutants of various land utilization types with one another according to hydrological sensitivity coefficients, and identifying critical pollution source areas; combining certain pollutant filter capacity coefficients of the different land utilization types on each grid pixel with one another along flow concentration paths to obtain the pollutant removing quality of vegetation. The value quantity model is computed by the aid of a combination of the marginal cost spent on purifying the certain pollutants and expected water quality standards of outlet sections of the catchment areas.

The invention discloses a biological fluidized bed adopting a tubular membrane and a water treatment method for the biological fluidized bed. According to the biological fluidized bed and the water treatment method for the same, the concentration of suspended microbes can be reduced, membrane pollution can be suppressed, the service life of the membrane can be prolonged, the concentration of suspended matters in effluent can be reduced, carrier loss can be avoided, and the effluent quality can be improved. A tubular membrane component is arranged on the middle part of a barrel. A catchment area is formed between a tube shell and the tubular membrane. A water outlet communicated with the catchment area is formed at the lower end of the tube shell, and is connected with a discharge pump through a catchment pipeline. An air outlet communicated with the catchment area is formed at the upper end of the tube shell. A raw water area is formed between the upper end of the tubular membrane component and the barrel. A gas-liquid mixing area is formed between the lower end of the tubular membrane component and the barrel. An aeration head opposite to an inner cavity of the tubular membrane is arranged at the bottom of the barrel. The inner cavity of the tubular membrane is an upflow area. A downflow area is formed between the tube shell and the barrel. Active sludge cultivated by the microbes and carrier particles with formed biofilms are arranged in the barrel. The fluidized bed has a good water treatment effect.

The invention discloses an urban area water logging flood processing simulation method based on a CD-TIN. The urban area water logging flood processing simulation method based on the CD-TIN takes a catchment area of an urban area based on a triangle surface patch partition as the basis of subsequent simulations. The urban area water logging flood processing simulation method based on the CD-TIN comprises (1) offering a calculation method of water volume runoff yield process in the catchment area based on inflow water volume and outflow water volume, (2) proposing a calculation method of dropsy water level in a flood area based on a triangular prism formed by a triangle which is taken as a bottom and three plumb lines which are made upwards from the three peak points of the triangle, and (3) designing a water volume confluence flow calculation method which takes characteristics of earth surface into consideration after the water volume of the catchment area reaches an water outlet. The urban area water logging flood processing simulation method based on the CD-TIN can effectively stimulate and analyze the range and the water depth of the urban area water logging flood, offers a new method for the research of an analysis software of the urban area water logging flood, and can supply technical support for urban area flood prevention, drainage scheme and emergency warning and rescue.

The invention discloses a DEM-based inland lake catchment area demarcation method. The method comprises the steps that DEM data of a digital elevation model in a set region is acquired, and the DEM data is cut to obtain basic DEM data; a ridge line in the set region is established according to the basic DEM data; spatial units of the digital elevation model are divided to obtain spatial flow direction raster data; and an inland lake catchment area is established according to the ridge line and the spatial flow direction raster data. Through the DEM-based inland lake catchment area demarcation method, the problem that it is difficult to perform catchment area demarcation directly on a geographic information platform because an inland lake lacks an explicit drainage basin outlet is effectively solved.

A GIS-based river network map generation method comprises a river network extraction and river network classification method based on surface confluence, wherein, the river network extraction method comprises the DEM depression pretreatment, the raster flow direction judgment, the upstream catchment area accumulation, the river section identification, the vectorization of river course and boundaryelements, and the topographic parameter statistics. The river network classification method comprises a Strahler method and a Shreve method. The invention combines a global river information system and generates a high-precision river network map according to the global river network data, the river section data, the river boundary condition data and the like of the basic geographic information provided by the global river information system, thereby providing an intuitive and realistic decision environment for relevant personnel.

The invention provides an inclined tube floating device for waste water treatment, belonging to the technical field of environmental protection, which is characterized in that: a water inlet is communicated with a whirl mixer arranged at the front end of the device; a mud bucket is arranged on the bottom end of the device body; the device is internally provided with a perforated dredge pipe above which is mounted with a depression area; the depression area is internally provided with an inclined plate and communicated with an absorption area which is arranged at the back end of a buffer area, the absorption area is internally provided with a releasing device of air flotation microbubbles, namely, an activated ploy-oxygen aerator; a mud collecting tank is also mounted on the top end of the absorption area; a catchment area is mounted on the top end of the buffer area, and water collecting equipment is mounted in the catchment area; the upper part of a reaction area is provided with an electric scraping vehicle for removing scum generated by air flotation, and the tail part thereof is provided with an effluent tank which is internally provided with a liquid level regulator; the bottom of the liquid level regulator is provided with a drain pipe. The invention has the beneficial effects of improving treatment effect, evenly mixing medicament and waste water, saving occupied area and materials consumption, increasing air flotation effect, lowering dramatically moisture content of the scum, eliminating dead zones in sludge discharging of devices, optimizing the effluent water quality and reducing moisture content of the sludge.

The invention relates to the technical field of rainwater drainage, in particular to a method of importing CAD data based on GIS into SWMM. The method includes the following steps: step 1, pre-processing CAD data, deleting and classifying the data before importing so as to be used by GIS; step 2, conducting data verification to verify whet that topological relationship between the node and the pipeline is correct; step 3, conducting GIS data extraction and calculation: including node data extraction, pipeline data extraction, catchment data extraction; step 4, importing that data into the SWMMmodel; step 5, carrying out result and parameter analysis: testing and simulating the imported model. The method has the beneficial effects of saving the SWMM modeling time of the CAD and GIS data sources, improving the model data precision, reducing the human error, realizing the lossless conversion and realizing the parameter determination of the node bottom hole elevation, the characteristic width of the catchment area, the average slope, the water storage quantity of the depression, the impermeability percentage and the like.

The invention relates to a road pavement runoff sewage intercepting wetland zone and a construction method thereof. An emergent aquatic plant pond, a horizontal subsurface flow constructed wetland, a submerged plant pond and other constructed road pavement source pollution control wetland zones are sequentially arranged nearby a road surface runoff catchment area, surface runoff pollutions are effectively controlled and then discharged into water bodies of rivers and lakes through effects of regulation and storage as well as sedimentation, purification and biodegradation, and pollution load entering the surface water body such as rivers and lakes is reduced. Compared with the prior art, the wetland zone and the construction method have the advantages that more than 30% of the surface runoff pollutions can be removed, so that a guarantee is provided for the water qualities of the water bodies of rivers and lakes and the integrity of ecological systems for the water bodies of rivers and lakes.

The invention relates to an urban catchment area division method. The urban catchment area division method comprises the steps: obtaining a refined digital elevation model, correcting the digital elevation model, carrying out catchment area division on digital elevation models with different resolutions, and determining the optimal resolution. The urban catchment area division method has the advantages that the digital elevation model is refined, and the influence of all urban terrains on catchment area division is fully considered; the digital elevation model is corrected based on urban drainage points, and the influence of the drainage points on catchment area division is converted into elevation values, and the accuracy of catchment area division is improved; by determining the optimalresolution, the influence of DEM data with different resolutions on catchment area division is fully considered, and the rationality of catchment area division is improved.

The invention particularly relates to a method for setting up drainage blind ditches in a large-scale landfill site in a loess hilly and gully region. A primary blind ditch is set up in a valley withbig catchment area and large flow volume, a secondary blind ditch is set up in a small gully, and drainage branch blind ditches are set up at spring eyes, structure water outlet points or other percolation points. The stratum positions of the blind ditches are set at the interface between a soil layer and a bedrock; the terrain positions of the blind ditches are selected based on that the primaryblind ditch should be set up along the bottom of the valley and the secondary blind ditch and the branch blind ditches should be prevented from excessive changes in slope as much as possible. The slope of the blind ditches is set to not less than 0.5%, and for a steep part with a big slope, vertically connected blind ditches are adopted. A geotextile covers the full cross-sections at the inlets ofthe blind ditches, and at the same time, stones are filled within 2m of the inlets of the blind ditches. The outlets of the blind ditches are subjected to special reinforcement according to the terrain. The method can guide the design and construction of the blind ditches in more detail and is more suitable for the large-scale landfill site in the loess hilly and gully region.

The invention discloses a riverbank buffer zone shrub configuration for reducing nitrogen and phosphorus in urban water source areas in high cold regions. Riverbank land areas, which are 10m above the maximum water level of the river in the slopes on both sides of the main stream and primary and secondary tributaries in the water catchment area, are provided with riverbank buffer zone vegetation. The vegetation comprises one or more of Salix cheilophila, Caragana opulens and sea buckthorn, wherein the Salix cheilophila is arranged in the riverbank buffer zone of the 0-2-degree slope; the Caragana opulens is arranged in the riverbank buffer zone of the 2-5-degree slope; and the sea buckthorn is arranged in the riverbank buffer zone of the 5-15-degree slope. The configuration can effectively entrap nitrogen and phosphorus pollutants to improve the runoff water quality, can fully display the functions of the riverbank buffer zone on purifying the water and retaining the silt, has favorable use effect, and can satisfy the function demands for reducing overland runoff nitrogen and phosphorus pollutants of the riverbank buffer zone in urban water source areas in northwest high cold regions.

The invention discloses a catchment area dividing method based on a triangle patch, which comprises: 1) a confluence path extracting method based on a plane-point-side-point confluence mode that water of the triangle patch converges at the lowest point and then converges at the maximum side along slope; 2) a dividing method for marking a first-level catchment area of an upstream triangle based on the plane-point-side-point confluence mode; and 3) a multi-level catchment area dividing method for filling low-lying vertex in the catchment area based on the elevation of a catchment area water outlet. The catchment area dividing method based on the triangle patch can be applied to basin characteristic analysis of confluence path extraction, catchment area (multi-level) division and water outlet judgment of digital earth surface (comprising complex earth surface based on CD-triangulated irregular network (CD-TIN)) represented by the TIN, provides a new method for TIN-based digital elevation model (DEM) basin characteristic analysis, and can develop the corresponding software for the digital hydrological field (applied to urban waterlogging flood process simulation and simulated analysis).

The invention provides a rainwater collection and treatment system for a sponge city. The system comprises a site rainwater pipe network, the site rainwater pipe network comprises a plurality of sub-catchment areas obtained by dividing a site according to areas in advance, according to each of the sub-catchment areas, by using a drain pipeline, a part of rainwater splits, and is collected and concentrated to a rainwater main pipeline, the other part splits to a municipal drainage pipeline, the rainwater main pipeline delivers the rainwater to a rainwater collecting pool through a rainwater intercepting and basket hanging device, a rainwater abandonment filtering device and a rainwater filtering device buried under the ground surface, the rainwater collecting pool is provided with an inspection well and a reusing well, recovered water in the rainwater collecting pool is lifted to the ground through a lifting pump in the reusing well, is further purified by a purifying integrated machine, and then is used for road washing or green irrigation. The system is managed according to regions, abides by the principle of ecological priority, promotes the utilization of rainwater resources andecological environment protection, reduces the discharging amount of regional rainwater runoff, and achieves ecological effects.

The invention discloses a sponge city test point area low-influence development facility simulation method, which comprises the steps of establishing an overall background model of a test point area in a storm flood management model SWMM, and simulating a rainwater runoff total amount and a runoff peak value before sponge city construction; selecting a target source project in the test point area,utilizing a low-influence development facility simulation module in the SWMM model to input design parameters corresponding to different types of low-influence development facility LIDs in the targetsource project, establishing a project model of the target source project, and simulating a reduction result of the target source project on the total rainwater runoff amount and the peak value, wherein the target source project is generalized into a sub-catchment area in the area integral model; and according to the simulation result of the target source project in the project model, the basic parameters of the sub-catchment area corresponding to the target source project are calculated and adjusted through the parameters, so that the overall sponge city construction effect of the test pointarea is embodied in the area model. According to the method, in large-scale regional simulation, the accuracy of low-influence development facility effect simulation in a regional model is guaranteed.