58 results about "Low-impact development" patented technology

The invention discloses a source rainwater purification and storage system based on low impact development. The source rainwater purification and storage system comprises a permeable pavement road and a concave herbaceous field. The permeable pavement road and the concave herbaceous field are connected, the bottom of the concave herbaceous field is provided with a bioretention layer, the bioretention layer comprises a biological layer, a sand layer and a gravel layer that are distributed in order, the bottom of the gravel layer is provided with a rainwater collection tank, the joint between the gravel layer and the rainwater collection tank is externally provided with a geotechnical cloth, the rainwater collection tank is composed of several rainwater collection modules, the upper parts of the tank wall on two sides of the rainwater collection tank are respectively provided with an overflow pipe, the rainwater collection tank is equipped with a water level monitoring device, by adopting a module mutual splicing method, the construction becomes convenient and the construction period is short, the collected rainwater can provide water needed for growth of green plants on the ground for a long time, natural rainwater is effectively utilized to reduce the consumption of the tap water employed by people to irrigate plants. At the same time, retention rainwater is stored to reduce surface runoff, thus being conducive to construction of sponge cities and protection of the ecological environment.

A forecast-integrated automated control system for combined greywater-stormwater storage and reuse. A simple and reliable approach for managing greywater and stormwater collection at a household or community level is provided, allowing for the near-continuous monitoring and adjustment of water quantity and quality in a combined greywater-stormwater storage tank based on monitored feedback / output from individual, tank-specific sensors and / or sensors located elsewhere in the water collection system. Use of the forecast-integrated automated control system for combined greywater-stormwater storage and reuse enables optimization of the water quality and quantity collected in the storage tank, reduce the amount of stormwater discharged to municipal sewers, and assure / demonstrate regulatory compliance for control of stormwater runoff through the integration of a low impact development best management practices.

The invention discloses an urban rainwater-infiltration ecological system based on low impact development, which comprises a bearing plate with a water drainage port, wherein a bearing bracket is fixedly arranged below the bearing plate; a rainwater infiltration area is formed between the bearing bracket and the bearing plate; the rainwater infiltration area comprises a composite filler layer having functions of purification, filtration and water retention; a certain space is reserved between the bearing plate and the composite filler layer to serve as a water reservoir bed; an overflowing pipe connected with an external water drainage pipe is arranged on the water reservoir bed; and a perforated water drainage pipe connected with the external water drainage pipe is embedded at the bottom of the composite filler layer. The urban rainwater-infiltration ecological system based on low impact development is simple in structure, has the function of purifying the water quality and storing the water, and can be effectively combined with the municipal ground.

The invention discloses a numerical simulation-based city low impact development optimization configuration method. The method comprises the following steps of performing numerical simulation by utilizing a mathematic model to obtain hydrological and water quality data; according to the hydrological and water quality data, establishing a city low impact development optimization evaluation system;determining index scores in the system; in combination with a Delphi method and an analytic hierarchy process, determining index weights in the system; and in combination with the index scores and weights, screening out a city low impact development optimal scheme. Compared with the prior art, the method has the advantages that the defect of insufficiently comprehensive consideration of factors incity low impact development is overcome; environmental, economic and social factors are comprehensively considered; the city low impact development scheme is objectively and quantitatively evaluatedin a qualitative and quantitative index combination mode; the city low impact development scheme with optimal environment-cost-benefit is screened out; and an effective technical management tool is provided for multi-objective management of sponge cities.

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 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 low-impact development facility optimization configuration method based on sponge city construction. The method comprises steps that the return period, a runoff coefficient and the LID facility area proportion are selected, and the current situation, traditional development and the LID situation are respectively simulated to acquire the corresponding runoff coefficient and the flood peak flow; the LID facility area proportion, the runoff coefficient and the return period are sequentially changed, previous steps are repeated to acquire a series of data in different modes, and the annual runoff total control rate and the peak flow closeness are calculated; according to relevant parameters of a sponge city construction index, the LID area proportion is determined; the LID facility area proportion with the peak flow closeness closest to 1 is the best proportion. The method is advantaged in that optimal configuration for low-impact development facility is realized,in the sponge city construction process, the optimal low-impact development facility combination based on land conditions and index requirements is rapidly selected, the amount of labor for multipletrials is reduced, efficiency is improved, and enforcement and popularization of low-impact development construction are promoted.

The invention discloses a method for determining the construction scale of a rainwater low-impact development facility. The method comprises a step of determining a CMIP5 preferred mode, a step of integrating the CMIP5 preferred mode and carrying out downscaling correction on an integration result to obtain future predicted daily rainfall data, a step of intercepting and grouping precipitation sequences by using the future predicted daily rainfall data and historical measured daily rainfall data and calculating and obtaining the basic trend of rainfall change in each city and a design rainfallchange standard deviation and difference under a same annual runoff total rate, a step of quantitatively assessing the climate adaptability of a rainwater low-impact development facility of a targetcity and determining the design rainfall of the target city under the annual runoff total rate by using the design rainfall standard deviation and difference of the target city under the annual runofftotal rate, and a step of quantitatively optimizing the construction scale of low-impact development and control facilities in the target city according to the difference change of the design rainfall under the total control rate of the target city. According to the method, the accuracy of prediction can be greatly improved.

The invention relates to the technical field of municipal engineering, in particular to a seepage and drainage pipe channel, specifically to a seepage and drainage pipe channel system for comprehensive utilization of rainwater. The seepage and drainage pipe channel system is suitable for new and reconstructed rainwater pipe networks of areas, wherein soils of the areas have a certain water seepage capacity; the seepage and drainage pipe channel system has integrated functions of rainwater collection, detention storage, purification, delivery, infiltration and discharge, can protect the land resources, reduce the peak flow, delay the occurrence of flood peak, implement the deep filtration and purification of rainwater, supplement the groundwater, and improve the soil moisture and air humidity, while the system overcomes the shortcomings of an existing rainwater drainage system fundamentally, fully reflects the concept of low-impact development, maintains the natural hydrological cycle, and repairs the ecological environment.

The invention discloses a rainwater low-impact development planning method based on waterlogging risk assessment, which includes the following steps: S1: quickly assessing the waterlogging risk in the planning area; S2: according to the regional hydrological characteristics of the planning area, the nature of the underlying surface, and the available space , urban planning scheme, development intensity specification, and waterlogging risk determine the priority utility function equation of the planning area, determine the priority of low-impact development and deployment in the planning area, and then sort and judge the suitability of low-impact deployment; S3: According to the The low-impact development priority class divides the planning area into several unit blocks, and assigns the overall target of runoff coefficient control in the planning area to each of the unit blocks until the total runoff coefficient determined by the weighted calculation of each unit block satisfies the runoff coefficient control of the planning area. The overall goal; S4: Draw the spatial layout map of runoff coefficient control in the planning area to provide decision support for low-impact development planning.

The invention discloses a rainwater low impact development (LID) planning method and a rainwater LID planning device. The rainwater LID planning method comprises the steps of: acquiring annual rainwater runoff coefficients of plots in a planning area and a runoff peak value of the planning area; planning rainwater facilities as an impact factor of each plot into the plot; calculating annual rainwater runoff coefficients of the plots added with the rainwater facilities and a runoff peak value of the planning area; judging whether the annual rainwater runoff coefficients are within a first preset range, and judging whether the runoff peak value is within a second preset range, if so, optimizing layout of the rainwater facilities in the planning area by adopting a rainwater facility optimization algorithm, otherwise, adjusting layout of the rainwater facilities in the planning area by adopting a rainwater facility adjustment algorithm. The rainwater LID planning method and the rainwater LID planning device achieve the modeling of a planning scheme after adding the rainwater facilities, can be used for planning the rainwater facilities in the planning area, and can optimize and adjust the layout of the rainwater facilities in the planning area according to the runoff coefficients of the plots and the runoff peak value of the planning area.

The invention relates to an experiment system for low impact development facility water quality simulation. The experiment system comprises an LID facility water quality simulation unit, an artificial rainfall control unit and a sample collection unit, wherein the LID facility water quality simulation unit comprises an experiment box (12) and an LID facility, the experiment box (12) and the LID facility are arranged in a side-by-side manner, the top portion of the experiment box (12) is opening, the LID facility is arranged inside the experiment box (12) and is communicated to the sample collection unit, the artificial rainfall control unit comprises a mixing assembly, a water supply assembly and a spraying assembly, the mixing assembly, the water supply assembly and the spraying assembly are sequentially connected through water conducting pipes (4), and the spraying assembly is arranged above the experiment box (12), and is arranged opposite to the LID facility. Compared with the experiment system in the prior art, the experiment system of the present invention has advantages of simple structure, convenient operation, economy and practicality, and is suitable for the low impact development facility water quality simulation research in the room, and further has the water amount simulation function.

The invention provides a rainwater sewage interception and flow distribution device and a drainage system. The rainwater sewage interception and flow distribution device comprises a flow distribution box body, and a sewage interception hanging basket arranged in the flow distribution box body. The flow distribution box body comprises a main box body, an overflow pipe arranged in the middle of the main box body in a protruding mode, and a drainage opening formed in the side wall of the main box body. A drainage groove is formed between the overflow pipe and the main box body, and the drainage groove is communicated with the exterior through the drainage opening. An overflow channel is formed in the overflow pipe, and the overflow channel is communicated with the drainage groove and the exterior. The sewage interception hanging basket is arranged on the top of the overflow pipe and covers the drainage groove, and the overflow channel and the drainage groove are separated and the drainage groove and the drainage opening are separated through the sewage interception hanging basket. According to the technical scheme, rainwater can be subjected to sewage interception and flow distribution, impact on low-impact development facilities can be reduced during a rainstorm, drained rainwater can be filtered, and therefore the water purification effect is guaranteed.

The invention relates to a low-influence development and landscape growth medium, and a preparation method and application thereof. The growth medium is prepared from the following raw materials in parts by weight: 55 to 65 percent of coarse sand, 10 to 20 percent of coco coir, 20 to 30 percent of dewatered sludge and 5 to 15 percent of monazite sand, wherein the dewatered sludge is subjected to biodeodorization and oxygenation stabilization in advance; the water content is not higher than 50 percent; the content of lanthanide in the monazite sand is not lower than 25 percent. The sludge difficult to be treated in an urban sewage plant is used for making the growth medium required by low-influence development, so that the difficult-to-treat sludge generated by an urban sewage treatment plant can be changed from waste materials into valuable materials. The growth medium provided by the invention has the water preservation and fertilizer preservation effects, so that nutrients cannot be released along rainwater runoff; a sufficient seepage rate can be achieved; the growth conditions of various landscape plants can be met.

The invention discloses a design method of low impact development storm-water system, and belongs to the technical field of low impact development storm-water treatment. The method includes selecting one or multiple water quality treatment methods and devices to perform water quality treatment for the storm-water from the storm-water water quality treatment methods and devices according to the concentration of the pollutant contained in the surface runoff of the storm-water and the size of the particulate matter, and selecting one storm-water water amount control method from storm-water water amount control methods according to the object of the storm-water treatment. The design method of the invention can reasonably design low impact development storm-water system according to the different objects of the storm-water treatment in the project and differences of specific storm-water water quality and water amount, can fully consider the effect, efficiency, and characteristic of each node facility in the system, can perform system efficiency-accounting for the whole technological process, and can effectively improve the perfectness and high effectiveness of the system based on the premise of guaranteeing purification quality of the water quality.

The invention discloses a low-impact development design and evaluation method and a low-impact development design and evaluation system. According to the method, the overall scheme design and evaluation mode with low influence on development and design is design-evaluation-redesign-reevaluation. According to the method, four units including project basic information setting, sponge city control target setting, low-influence development design and result summarization are based on an Excel tool. The technical problems that an existing method is high in specialization degree requirement, complexand low in implementation efficiency are solved.

The invention discloses a low-impact development multi-objective interval optimal configuration method based on an SWMM model, and the method comprises the steps: building a current situation model ofan urban research region based on the SWMM model, and carrying out the current situation simulation and elastic analysis of a drainage pipe network system in the urban research region; establishing amulti-objective optimization system, and determining an optimization variable and an objective function of the optimization system; and enabling the objective function to take the minimum LID facility cost and the minimum drainage pipe network system elastic index as optimization objectives, and optimizing by combining a multi-objective interval optimization algorithm. A formula for calculating the elasticity index U-Res of the drainage pipe network system is provided to comprehensively evaluate the elasticity of the drainage pipe network system, and water quantity and water environment indexes are comprehensively considered; the minimum LID facility cost and the minimum pipe network system elasticity index U-Res are used as optimization objectives for solving by adopting an intelligent algorithm; the optimization model taking the runoff reduction rate as the constraint condition effectively overcomes the subjectivity of the traditional weight method and reduces the artificial noise influence.

The invention provides a low-impact development simulation method. The low-impact development simulation method comprises the steps: acquiring geographical condition information and preset space planning requirements of all target land parcels; determining the waterlogging risk grade, the water environment pollution grade and the sponge measure arrangement potential grade of each target land parcel according to the geographical condition information and the space planning requirements; based on the waterlogging risk level, the water environment pollution level and the sponge measure layout potential level, determining a low-impact layout priority level of each target land parcel by utilizing a fuzzy comprehensive evaluation method; and optimizing and adjusting a plurality of targets of sponge city construction by utilizing a genetic algorithm according to the low-impact layout priority. According to the low-impact development simulation method, geographical condition information and preset space planning requirements of each target land parcel are comprehensively considered, and the rationality and effectiveness of sponge city construction can be improved. The invention further provides a low-impact development simulation system and device and a computer readable storage medium, which all have the above beneficial effects.

The invention discloses a method for determining low-influence development construction sequences of plots in sponge city construction. According to the method, a hydrological sensitive index (Lambda)is put forward to determine a construction sequence of a low-influence development measure of each plot. The hydrological sensitive index indicates ability, easy to generate runoff, of the plot in awater collection area. If the value of (Lambda) is greater, the plot is easier to generate runoff, and priority of the low-influence development construction of the plot is more meaningful. In other words, if the area-perimeter ratio, gradient, waterproof area ratio, runoff width and runoff coefficient of the plot are greater, the soil saturated hydraulic conductivity and soil layer thickness aresmaller, and the effect of the plot after the low-influence development construction is more remarkably. Finally, practical conditions of plots are inspected by combining the site, and the sorting isscientifically adjusted by combining a practical operability principle and an economy principle of each low-influence development measure.

The invention discloses a sponge type campus rain swage recycling method based on low impact development. By adopting effective entrapment way and late treatment facility, the campus space is reasonably utilized to improve the rainfall runoff volume control ability and provide a water gathering surface and a storage space; meanwhile, a sewage regeneration system is established by use of the underground space. The problem in draining rainwater in a campus can be solved, and a water source can be provided for the campus. The regeneration and reusing of rain sewage are realized while the drainage safety of the campus is ensured, thus the problems of water shortage and waterlogging in the campus are remarkably relieved, and overall ecological system of the campus can be recovered; through the self-cleaning ability of the natural ecological system, the ecological environment of the campus is improved, and a beautiful ecological campus is constructed. 80% or more of the annual rainfall and 85% or more of the annual sewage in the campus are recycled.

The invention discloses a low impact development based source rainwater sand setting well comprising a bottom board, a well wall, a cast-in-place reinforced concrete coping, a kerbstone and grassing cover boards. A bottom board filter hole is formed in the bottom board, the well wall is built on the bottom board, the cast-in-place reinforced concrete coping is casted above the well wall, the kerbstone is mounted in the cast-in-place reinforced concrete coping, a water inlet is formed in the kerbstone, the grassing cover boards are supported on a well top by the aid of the cast-in-place reinforced concrete coping, the kerbstone surrounds the periphery of the grassing cover board, and overflow holes are formed in the cast-in-place reinforced concrete coping and the kerbstone and below the grassing cover boards. The low impact development based source rainwater sand setting well is simple in structure, has a function of removing solid pollutants in rainwater runoff, can be widely used for solving the problem of rainwater runoff pollution, and has high social, environmental and economic benefits.

The invention discloses a zero-discharge sponge urban rainwater system. The rainwater system comprises a low-impact development system and a waterlogging prevention and control system; according to the low-impact development system, the rainwater recurrence period standard is selected through technical and economic comparison, rainwater of a land parcel is subjected to source dispersion, permeation, retention and storage through the system design, so that the purposes of organizing the rainwater and controlling the runoff are achieved; and the waterlogging prevention and control system comprises a rainwater overflow facility and a tail end regulation and storage facility, rainwater exceeding the recurrence period standard forms source overflow rainwater, and the source overflow rainwater is drained to the tail end regulation and storage facility through the rainwater overflow facility. According to the rainwater system, a traditional rainwater pipe network is replaced by a grey-green combined sponge facility, so that the construction cost is reduced; and the technical problems that a conventional sponge city is insufficient in runoff total amount control capacity, only medium and light rainfall events with high frequency can be controlled, and rainwater is still drained through a rainwater pipe canal system are solved, and finally zero rainwater drainage is achieved.

The invention discloses an ecological riverway embankment structure for sponge city construction. The structure comprises a land area buffer zone area and a waterfront plant zone area. The land area buffer zone area comprises a riverside footpath, a plant buffer zone, a water seepage facility, a water storage facility, a water drainage facility, and a water delivery facility; the riverside footpath is paved in a permeable mode; the water seepage facility comprises seepage wells and seepage blind pipes; the water storage facility comprises a water storage chamber and a balance vent pipe; the water drainage facility comprises a first water drainage pipe and a second water drainage pipe; the water delivery facility comprises a vertical shaft and a water pump; the waterfront plant zone area comprises an ecological embankment and an ecological wetland; the ecological embankment comprises an ecological frame, a reinforced concrete foundation, a revetment bottom plate wall, a gravel invertedfilter body and revetment greening; and the ecological wetland comprises imitation timber piles, emergent aquatic plants, floating plants and submerged plants. The ecological riverway embankment structure for sponge city construction can be used for the sponge construction of urban riverways, low-influence development of plots is achieved, meanwhile, the concepts of seepage, stagnation, storage, purification, use and discharge of sponge elements are embodied, and the diversity of the riverway embankments is improved.

The invention discloses a multifunctional low impact development bioretention system, belonging to the field of ecological environment construction. The system sequentially comprises a plant layer, arunoff water temporary storage layer, a covering layer, a planting soil layer, a sand layer, a gravel water storage layer and a rain storage bucket from top to bottom, wherein the gravel water storagelayer is provided with a perforated pipe communicated with the outside; the planting soil layer is provided with filler, and the filler is filled in a manner of completely mixing the matrix filler; the filler is prepared from soil, sand and organic matter; the sand layer is used for filtering and preventing soil particles from entering the gravel water storage layer. The multifunctional low impact development bioretention system provided by the invention is mainly used for reducing surface and roof runoff flow, relieving internal waterlogging, removing eutrophic substances such as NH<+4>-N, TN and TP, storing water for secondary utilization, adjusting ecological climate, and the like. The effluent concentration reaches the water quality standard for surface water Class II, so that the system greatly alleviates surface and roof runoff pollution.

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 provides a sponge city water-logging degree evaluation method based on water-logging power impulse. An index system which comprises instantaneous partial city water-logging indexes, comprehensive partial water-logging indexes, partial overall water-logging index standard values, and the like and is used for evaluating city water-logging degrees, and a specific calculation and analysis method of the system are established; with reference to analysis and display of engineering cases, the index system is capable of effectively reflecting time and space distribution characteristics of water logging; due to dimensionless quantity of the index values, a scientific method for expressing water-logging degrees is established, and the evaluation method can be relatively scientific; thewater-logging degrees of water-logging points of a city can be effectively reflected through the calculated comprehensive partial water-logging indexes, the overall water-logging degree of the city can be effectively evaluated through calculated partial overall water-logging design values, the overall reasonability of water-logging prevention design of LID (Low Impact Development) measures can bedescribed through average values of calculated overall partial water-logging index standard differences, and partial distribution nonuniformity of water-logging can be effectively reflected through calculated overall partial water-logging index standard differences and variant coefficients, so that reference is made for sponge measure design and evaluation on LID measures and the like; in addition, planning design reasonability can be evaluated by using the two indexes, so that the evaluation method can be relatively scientific and reasonable.

The invention relates to the technical field of surface runoff control and utilization, in particular to a multi-objective optimization method for a surface runoff control and utilization scheme, and the method comprises the steps of building a current urban rainfall flood simulation model of a research area through an SWMM model; establishing a future urban rainfall flood simulation model of the research area on the basis of the current urban rainfall flood simulation model, and preliminarily estimating the scale of each measure according to a design scheme and a planning scheme; establishing a research area runoff control objective function; and establishing a research area runoff control scheme optimization model on the basis of the research area future urban rainfall flood simulation model and the research area runoff control objective function. According to the invention, the non-dominated sorting genetic algorithm and the SWMM model are combined, multiple low-influence development measure combinations of the same plot and the change of the flow length of the district are considered, a multi-target scheme optimization technology for retaining and storing the runoff, improving the runoff water quality and reducing the manufacturing cost is established, and technical support is provided for sponge city construction.

The invention discloses a sponge type comprehensive pipe gallery hydrological effect evaluation method. The method comprises the steps of obtaining basic data of a research area; constructing an SWMMmodel according to the basic data of the research area, and obtaining hydrological effects under a traditional development scene and a traditional comprehensive pipe gallery scene according to the SWMM model; constructing an SUSTAIN model according to the basic data of the research area, and obtaining an LID optimization layout scheme through the SUSTAIN model; inputting the LID optimization layout scheme into an SWMM model, and performing hydrological simulation on the low-impact development facility scene and the sponge type comprehensive pipe gallery scene through the SWMM model to obtain hydrological effects under the low-impact development facility scene and the sponge type comprehensive pipe gallery scene; and comparing and evaluating the hydrological effects of the four scenes to obtain a hydrological effect evaluation result under the sponge-type comprehensive pipe gallery scene. According to the invention, accurate hydrological simulation and hydrological effect evaluation ofthe sponge type comprehensive pipe gallery scene can be achieved, and a reference basis is provided for planning, design and construction work of sponge cities in the future.

The invention discloses an ecological water treatment system built by virtue of solar energy and a low impact development facility. The ecological water treatment system comprises a photovoltaic water pumping system and the low impact development facility, wherein the low impact development facility comprises a multifunctional water storage pond, a wetland system, a natural water discharging system, a rainwater garden system, a wet pond and a drop water landscape; the wetland system is arranged along the edge of the multifunctional water storage pond; the drop water landscape, the rainwater garden system, the natural water discharging system and the wet pond are communicated in series to form a circulating water subsystem; the photovoltaic water pumping system is used for pumping a water body in the water storage pond to the drop water landscape; the water body naturally flows by self potential energy and enters the water storage pond through the circulating water subsystem so as to realize circulating treatment of ecological water. According to the ecological water treatment system, the operating expense is reduced, site rainwater can be regulated, stored and recycled, and the water body is treated by virtue of ecological measures to improve the water quality; water resources are saved, the original hydrological conditions before development are maintained, the runoff pollution is controlled, and the pollution emission is reduced; the'activity' of the landscape is improved and the landscape water environment is beautified.