58 results about "Low-impact development" patented technology

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 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 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 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 a rainwater vertical tube mounting structure for a flat roof of a building based on low impact development thought and a mounting method. The mounting method includes following steps: firstly, adopting a boundary of an opening of a rainwater vertical tube and the flat roof as an inner ring, pouring isosceles triangle concrete with the bottom edge of 2h and the height of h, peripherally pouring the isosceles triangle concrete around the inner ring by a circle, and taking h from a range between 5cm and 10cm; and secondly, arranging a pollutant intercepting net with the aperture ranging from 5mm to 10mm on the top of the poured annular concrete. The pollutant intercepting net can be made of plastics or anti-corrosion metal. The design method is an engineering method for a low impact rainwater development system idea, has the advantages of simple structure, low construction investment and running cost, simplicity and convenience in operation and management, high rainwater runoff peak discharge reducing ability, and plays an important role in reducing urban flood risks.

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.