82 results about "Stormwater pollution" patented technology

The invention relates to the field of urban rainwater treatment systems, in particular to a separate system pipe network based area fragmented rainwater abandoned flow treatment system. An area internally comprises a sewage header pipe, rainwater branch pipes and sewage branch pipes; the discharging ends of the sewage branch pipes are communicated with the sewage header pipe, the area is divided into a plurality of segments in a grid shape, and the area of each fragment is 0.2-4 square kilometers; each fragment is internally provided with a sewage branch pipe, a rainwater branch pipe and one or more abandoned flow wells; each abandoned flow well comprises a well body, each well body is provided with a water inlet pipe communicated with the discharging end of the corresponding rainwater branch pipe, a water outlet pipe communicated with natural water and an abandoned flow pipe communicated with the sewage header pipe. The separate system pipe network based area fragmented rainwater abandoned flow treatment system is simple in structure, the problem of delay in the long-distance conveying process of initial rainwater in the prior art is solved through the independent abandoned flow wells in the fragments, the treatment pressure of a sewage treatment plant is relieved, the situation that initial rainwater pollutes natural water is further avoided, and discharging treatment of rainwater is more reasonable and effective.

A stormwater pollution management apparatus for a stormwater basin including a water intake assembly having a first end and a second end generally aligned along an axis and includes a hollow inverted T-shaped connector. A horizontal intake projects in a first direction from one side of the T-shaped connector toward the first end of the water intake assembly. The axially elongated intake defines a series of openings along the length and about the periphery thereof. An outlet projects in a second direction from a second side of the T-shaped connector toward the second end of the water intake assembly. A wrapper extends along and about the generally horizontal intake for creating an energy differential between the sediment water flowing into the water intake assembly and the water in the basin thereby affecting separation of particulate sediment from the water flowing into the water intake assembly. A hollow riser extends upwardly from the connector. A terminal end of the riser extends a predetermined distance below an emergency overflow level of the basin. Moreover, the hollow riser defines a passage for viewing water quality flowing toward the second end of the water intake assembly. A method for managing stormwater pollution drainage from a stormwater basin into a storm drain is also disclosed.

The invention discloses a method for carbonized materials loaded in a road green belt to purify run-off rainwater in situ. The method for carbonized materials loaded in the road green belt to purify the run-off rainwater in situ comprises the following steps that biomass waste like crop straws and park dead leaves is converted into charcoal, and the charcoal is arranged under the rhizosphere soil layer of plants in the road green belt and serves as adsorbent to absorb and remove pollutant in the run-off rainwater. The invention further relates to the multifunctional road green belt capable of purifying the run-off rainwater and a laying method of the multifunctional road green belt. The green belt comprises a vegetation layer, a soil layer, a charcoal layer, a water drainage layer and a sewer tunnel layer from top to bottom. According to the method for carbonized materials loaded in the road green belt to purify the run-off rainwater in situ, the run-off rainwater on the road is led to the green belt, pollutants like nitrogen, phosphorus and heavy metal in the rainwater are held back and absorbed through double filtering of soil and the charcoal, and therefore the purpose of rainwater purification is achieved. The method for carbonized materials loaded in the road green belt to purify the run-off rainwater in situ is simple, low in operation cost, can utilize the biomass waste, reduces surface run-off rainwater pollution, is a multi-win run-off rainwater in-situ processing method, and meanwhile expands the functions of the green belt.

The invention relates to the field of urban rainwater treatment systems, in particular to a region sectioning rainwater treatment system based on a separate-system pipe network.The region sectioning rainwater treatment system comprises multiple sections divided according to area and a sewage manifold communicated with a sewage treatment plant, a sewage branched pipe, a rainwater branched pipe and at least one rainwater treatment facility are arranged in each section, each rainwater treatment facility is communicated with a discharging end of the corresponding rainwater branched pipe, a discharging end of each rainwater treatment facility is communicated with a natural water body, and a discharging end of each sewage branched pipe is communicated with the sewage manifold.The region sectioning rainwater treatment system is simple in structure, an urban water treatment system is divided into independent sections, and each rainwater treatment facility which is independent is arranged in the corresponding section, so that the delay problem in the process of long-distance delivery of early-stage rainwater in the prior art is solved, treatment pressure of the sewage treatment plant is reduced, the early-stage rainwater is avoided causing pollution to natural water, discharging treatment of rainwater is more reasonable and more efficient, and the region sectioning rainwater treatment system has high popularization value.

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

The invention relates to an in-situ reducing device of initial rainwater pollutants of urban landscape river. A conventional rainwater port is communicated with an overflow distributing well which is communicated with a rainwater retaining chamber through a water pipe and is provided with an adjustable overflow weir, and suspended organism filling balls are placed in the rainwater retaining chamber. The invention overcomes the defects of reconstruction of urban road surfaces, huge project cost, low possibility of general implementation, limitation of actual spaces of a river way and a bankside on constructing a large-capacity storage pond, processing requirement of a sewage processing plant after raining, large project investment and the like existing in two kinds of methods of source reduction, in-place processing and collection and storage processing. The invention effectively retains granular organic matter at the initial period of raining, reduces the input quantity of the rainwater for the river, and can remove granular organic matter of more than 70% and biologically degrade so as to lower the pollution degree of the initial rainwater on the water quality and the ecology of the urban landscape river. The invention has the advantages of simple structure, reliable effect and convenient maintenance.

The invention relates to a roof garden rainwater deep purification system capable of achieving automatic diversion and belongs to the field of sewage treatment. According to the technical scheme, the system comprises a plant box, a water storage tank, an initial rainwater purification module and a later rainwater purification box, and can conduct diversion on initial rainwater and later rainwater according to the amount of rainfall; the initial rainwater purification module comprises a filtering layer, a root-resistant layer, a filter element layer and a bearing layer, and can conduct deep purification on the initial rainwater; the later rainwater purification box conducts simple filtering on the later rainwater; the content of pollutants in the initial rainwater is high, deep filtering is needed, the content of pollutants in the later rainwater is low, and no deep filtering is needed. By means of a diversion mode, the initial rainwater is separated from the later rainwater, the rainwater treatment load of an initial rainwater filtering device is reduced, all modules in the purification system are mutually independent, assembly is simple, maintenance is convenient, and all the components can be quickly replaced and washed; the system consumes no energy, the rainwater treatment function is achieved and the system further has a landscape value.

The invention relates to the field of city rainwater treatment systems, in particular to a zone partition rainwater flow dividing treatment system based on a separate system pipe network.The system comprises a plurality of partition zones divided according to the area and a sewage main pipe communicated with a sewage treatment plant.A sewage branch pipe, a rainwater branch pipe and at least one multifunctional rainwater treatment device are arranged in each partition zone; the multifunctional rainwater treatment devices are communicated with the discharging ends of the rainwater branch pipes, and the discharging ends of the multifunctional rainwater treatment devices are communicated with natural water; the discharging ends of the sewage branch pipes are communicated with the sewage main pipe.The system is simple in structure, the city water treatment system is divided into independent partition zones, the independent multifunctional rainwater treatment devices are arranged on the partition zones so that the delay problem of initial rainwater in the long-distance transportation process in the prior art can be solved, treatment pressure of the sewage treatment plant is reduced, it is also avoided that natural water is polluted by initial rainwater, rainwater discharging treatment is more reasonable and efficient, and popularization value is great.

The invention provides a sewage-intercepting and flow-abandoning type rain collector capable of performing back flushing automatically. The sewage-intercepting and flow-abandoning type rain collector comprises an automatic control system, a flow-abandoning sensor and a rain water before-collection treating and distributing device. The flow-abandoning sensor at least comprises a flow-abandoning regulating chamber and a photoelectric liquid level sensor installed in the flow-abandoning regulating chamber; the rain water before-collection treating and distributing device at least comprises a base and a rail water distributing treating pool installed on the base, and the rain water distributing treating pool sequentially comprises a potential-reduction adsorption cavity, a flow distribution cavity and a sediment collection cavity from top to bottom; and the automatic control system at least comprises a power source, a singlechip and a conductor. The rain water collector takes raininess and rainwater quality into accounts and simultaneously can regulate the flow abandon amount at the initial rainfall stage, and the abandoned rail water is discharged after treatment, so that the abandoned rain water can be prevented from polluting the underground water. The sewage-intercepting and flow-abandoning type rain collector can further perform automatic back flushing, is improved in using benefit, and simultaneously can convert the potential energy of the rain water into electric energy so as to supply power for the rain water collector.

The invention provides a modular system of a rainwater organism retention facility which can be installed quickly. The system includes a modular pool body, and a filler unit is arranged in the modularpool body. The modular pool body comprises two lateral modules and multiple middle modules connected to the lateral modules, wherein each lateral module is of a semi-frame structure, the top surfaceof each lateral module is opened, the surface, adjacent to the middle modules, of each lateral module is opened, and the other surfaces of each lateral module are connected with one another; the top surface of each middle module is opened, the two surfaces, connected to corresponding adjacent modules, of each middle module are opened, and the other surfaces of each middle module are connected withone another. The filler unit is made into a prefabricated medium filler structure according to a corresponding size of the pool body and characterized in that the size of the single size is small, installation is easy and convenient, and assembly-type construction can be achieved. A traditional on-site pool construction and medium loading process is changed into a mode of carrying out prefabricated production in a factory and fast installation on site. Not only is the manpower cost saved, but also the time cost is saved, and an expectant disposal effect on rainwater pollutants can be achieved, so that the modular system is a novel environment-friendly facility product for a sponge city.

The invention relates to an automatic-cleaning rainwater inspection well comprising a well body, a well cover and a well bottom. The well body is provided with a raw water intake pipe and an effluent sand-setting pipe, an automatic-cleaning device is arranged between the raw water intake pipe and the effluent sand-setting pipe and comprises a water flowing plate which is fixed in the well body and separates the well body into two areas, the water flowing plate is provided with a water filtration grid at one side of the raw water intake pipe, and the water flowing plate is only provided with a water flowing hole at the joint with the water filtration grid. The automatic-cleaning rainwater inspection well not only can reduce the sand content of rainwater in a subsequent rainwater pipe network, decrease the content of rainwater pollutants in subsequent rainwater storage treatment facilities, improve the cleanness of rainwater entering a landscape water body and decrease subsequent rainwater treatment cost, but also can avoid using motors or consuming electricity as compared with traditional rainwater whirlpool separation purification equipment, thereby being more economic and energy-saving equipment.

The invention discloses road rainwater recycling equipment. The road rainwater recycling equipment comprises a drainage and permeation device and a rainwater processing device, wherein the drainage and permeation device collects road rainwater in a drainage channel into the rainwater processing device through a processing water inlet pipe; the rainwater processing device comprises an equipment barrel, as well as a grit chamber, a hydrocyclone separation device, a prefilter device and a secondary filter device which are arranged in the equipment barrel and sequentially communicated from bottom to top; the prefilter device and the secondary filter device are connected through a filler supporting plate, and a porous water-out plate is arranged at the top of the secondary filter device; the side edge of the equipment barrel above the secondary filter device is connected with a processing water outlet pipe; and the water outlet of the processing water outlet pipe is connected with a rainwater storage and recycle device. The road rainwater recycling equipment is simple in structure, small in space occupation and good in processed effluent quality, can effectively reduce discharge of runoff rainwater pollutants, can be combined with greening-used land at the periphery of a road, is ecological and environment-friendly, and has a favorable popularization value, and the problems of high urban road flood draining pressure, severe road runoff pollution and rainwater resource loss and the like are solved.

A hydraulic separation and collection system applicable to linear street curb-inlet type drainage-chambers, independent or connected to a storm drainage network. The FIRST FLUSH COLLECTOR™ is a pollutant separation and collection apparatus that can be integrated into an existing storm drain network, or be retrofitted as a component into a new or existing curb-inlet type drainage-chamber. The outfall from the FIRST FLUSH COLLECTOR™ can be redirected to a conventional stormwater pollutant BMP, or be diverted to a sanitary sewer, storm drain, or combined collection system for treatment downstream. The apparatus is envisaged as a simple, easy to install prefabricated-kit utilizing a basic build-in-place separation and collection apparatus. The apparatus can be readily adapted to the needs of a given curb-inlet type drainage-chamber with minor alterations to the chambers, or to the connected existing storm drainage network. The uniquely adaptative capability of the apparatus enables selective structuring based on the retrofitting requirements of a curb-inlet type drainage-chamber. The system is designed to handle a variety of ecosystem-contaminants, ranging from basic street-refuse and floatable objects, to coarse sediment, finer silt, and comparatively minute environmentally-hazardous petrochemicals, heavy-metals, phosphates, and nitrates. The system is design to refuse floatables and debris which will continue to the existing curb-inlet type drainage-chamber. Other pollutants contained in the first flush are readily collected from the apparatus and transferred to a selected outfall facility. The system has no moving or mechanical components and is designed to function on fluid hydraulic principles.

The invention discloses an automobile luggage rack. The automobile luggage rack comprises a supporting device, a storage device is arranged on the supporting device, a rotating device is arranged on the right side of the storage device, a fixing device is arranged on the rear side of the storage device, the supporting device comprises a supporting bottom plate and a supporting rod, and the supporting bottom plate is arranged at the bottom of the supporting rod. According to the automobile luggage rack, the length of a second storage box in a first storage box can be manually pulled upwards according to the quantity of luggage, so the storage space of the device can be expanded; meanwhile, a second storage box cover is arranged at the top of the second storage box, so luggage in the first storage box and the second storage box can be prevented from being polluted by dust and rainwater in the running process; and when the storage spaces of the first storage box and the second storage boxcannot meet the requirements, the luggage can be placed above the first storage box and the second storage box, and then a net bag can be pulled out of a rectangular box under the cooperation of a motor to cover the luggage, so that the storage space of the device can be further expanded.

The invention provides a silt well rainwater pollutant interception facility and an interception operation method. The whole main body of the facility is in barrel shape. Two sides of the upper part of the facility main body are provided with a water inlet pipe and a water outlet pipe. The water inlet pipe is inclined and is inserted in the facility main body and is connected with a peripheral body tangent insertion inner wall of the facility main body. A supporting frame in the facility main body is provided with a diversion cylinder. Rainwater forms an eddy state between the inner wall of the facility main body and the diversion cylinder, to generate centrifugal force. Foreign matters in the rainwater fall in a sediment collection region from a lower ventage of a guide plate, and are discharged by opening a discharge hole. The facility is simple in structure, good in reliability, and simple in installation and maintenance, and interception and treatment efficiency on rainwater runoff pollutants is improved. The improved facility main body still maintains to be integrated, and installation and overhaul are convenient, and just regular checking and desilting and pollution discharge are needed.

The invention discloses a pervious concrete pipeline system for reducing rainwater pollutant content. The pervious concrete pipeline system comprises a concrete pipe, wherein a water filtering layer is wrapped outside the concrete pipe; the concrete pipe comprises a plurality of pervious walls and impervious walls, the pervious walls are mainly made of pervious concrete added with adsorbates, and the impervious walls are mainly made of impervious concrete. According to the invention, when the drainage volume is small, all the rainwater can be completely drained through impervious parts of the concrete pipe, and then concentrated; when the drainage volume is large, a part of rainwater can be completely drained through the impervious parts, and the other part of rainwater can be drained to surrounding media through the pervious parts to improve the drainage capacity of the pipeline; furthermore, the adsorbates can adsorb heavy metals in osmotic water to lower the pollution of the heavy metals to the environment; the water filtering layer can adsorb dissolved organic matters in osmotic water to reduce the influence of the organic matters on the environment.

The invention discloses an urban open trench black and odorous water body treatment method. The method combines sewage interception, a preposed pond, a grassed trench and dredging, and a rainwater regulating and storing pond is not built; on the basis of balance calculation of total incoming water amount and total pollutant of an open trench and water reducing amount and pollutant reducing amount of each measure, quality reachability of water flowing into a river is analyzed, and engineering amount is checked on the basis of water quality reachability; rainwater catchment area is divided on the basis of terrain on a topographic map and water flow direction of a current rainwater pipeline network, and catchment area of sewage is divided on the basis of a current sewage pipeline network and on-site detection. The preposed pond plays a role in regulating and storing rainwater and removing SS and a little of organic pollutant in the rainwater, and the grassed trench serving as an ecological diversion belt can intercept rainwater pollutant and can lower runoff peak value through infiltration and prolonging rainwater retention time when being used for rainfall flood transmission. Quality of rainwater flowing into the river from the open trench reaches standards higher than over-ground class-5 water in wet reasons.

The invention provides a rainwater treatment system and method for a planted roof. The system comprises a connecting pipe, a water collecting funnel, a spiral coil pipe, an overflow pipe and a water outlet pipe group. The pipe diameter and the rotation radius of the coil pipe are gradually decreased from top to bottom, so that the water collecting area is increased, impurities such as particles inrainwater are quickly filtered out through reducing and spiral acceleration, water is thrown from the coil pipe into a rainwater pipe to be used, while water with high mud content is led out from water outlet pipes at the bottom end of the coil pipe, and thus the rainwater on the planted roof is subjected to primary drainage and medium filtration. The system can be directly installed in the existing rainwater pipe, can effectively separate particulate suspended matter and pollutants from the rainwater of the planted roof, and avoids blockage of the rainwater pipe and rainwater pollution.

Stormwater pollution prevention systems, vaults, boxes, and methods of treatment systems to capture pollutants from storm water runoff and prevent the conveyance of these pollutants from entering a receiving water body or landscape area. The systems can be part of a local permanent storm water drainage infrastructure, where the system combines both drainage conveyance, multi-level treatment techniques, variable hydraulic capabilities, and easy and inexpensive methods for servicing the systems. The systems can use cartridges, each having either a treatment media or treatment polymer inside, wherein the cartridges can be serviced without requiring anyone to enter into a treatment vault/box.

The invention discloses atmospheric pollution precipitation sampling detection equipment for environmental engineering. The equipment comprises a rainfall sampler body, a supporting frame, a samplingassembly and a ventilation assembly. The supporting frame is fixedly welded to the outer wall of one side of the rainfall sampler body, the sampling assembly is fixedly welded to the outer wall of thetop end of the supporting frame, and the ventilation assembly is fixed to the inner wall of one side of the rainfall sampler body; the sampling assembly comprises a water collecting barrel, a supporting plate, a rotating groove, a sliding groove, a rotating rod, a sliding block, a rack, a sampling pipe, a first motor and a gear; by adopting the sampling device, rainfall rainwater at different moments can be collected, the rainwater pollution degree of each time period can be conveniently detected, and then the result value of each time period is averaged so that the accurate effect of the detection structure can be conveniently improved; and a ventilation device is further adopted, the outdoor ventilation effect of the device can be improved, rainwater can be prevented from entering the device in rainy days, and the internal structure of the device is prevented from being affected.

The invention provides a gutter inlet suitable for sponge city construction and black and odorous water treatment, and relates to the field of environment-friendly gutter inlets. The gutter inlet comprises a primary filtering mechanism, a sewage interception mechanism and a sewage restoration mechanism. The primary filtering mechanism comprises an outer frame and a cover plate arranged on the topof the outer frame, and two sides of the cover plate are placed on the top of the outer frame through anti-skid pads. According to the invention, the primary filtering mechanism, the sewage interception mechanism and the sewage restoration mechanism are arranged, so that rainwater pollutants can be intercepted, filtered, adsorbed and sedimented in sequence, the purification of the initial water quality of the rainwater can be effectively realized, the urban non-point source pollution is controlled, the pollution problem of pollutants to urban water is solved, multiple pollutant intercepting measures are taken, an overflow bin, as well as a first sewage purification bag and a second sewage purification bag which carry out reverse filtering on rainwater are further arranged, and therefore the rainwater purification problem can be efficiently solved, and smooth rainwater drainage can be guaranteed.

The invention discloses a method and a device using Pamp; the invention discloses a method and system for deducing and designing a rain pattern through a C method. The use of Pamp; the method for deducing and designing the rain pattern through the C method comprises the steps of determining a designed rain pattern statistical sample, determining and sequencing the rainfall proportion of each time period of single rainfall, counting and averaging the rainfall proportion of the corresponding sequence time period of multiple rainfall, determining the rainfall proportion of each sequence, and deducing and designing the rain pattern. According to the method, data cleaning is carried out on rainfall data of more than continuous years of data years, statistics and average processing are carried out on rainfall proportions in corresponding sequence time periods of multiple rainfall in multiple years, the average rainfall in each time period of rainfall duration is determined, and a short-duration design rainfall pattern suitable for initial rainwater interception is deduced; the problems that when the local most representative rainfall process or a rainfall sample with the maximum rainfall every year is adopted as the design rain pattern, the representativeness of the rainfall sample is insufficient, and the design rain pattern cannot meet the design requirement for serious pollution of initial rainwater are solved.

The invention belongs to the technical field of rainwater collection, and discloses an energy-saving building rainwater collection system. The energy-saving building rainwater collection system comprises a water quality detection module, a pressure detection module, a capacity measurement module, a main control module, a conveying module, a filter module, a water storage module, a purification module and a display module. Through the water quality detection module, water quality data of rainwater can be detected in real time, and usage risk caused by serious rainwater pollution is prevented; meanwhile, through the purification module, the purification effect is good, impurities are removed completely, then, the water quality is further treated by microorganisms so that the pH, chromaticity, COD, BOD5, sulfide, nitride and the content of organophosphorus of a water body can be reduced within specified standards, and accordingly the purpose of purifying the water body is achieved; the energy-saving building rainwater collection system makes the usage range of the rainwater wider.

The invention discloses an ecological bank protection module and system with an initial rain purifying function. The ecological bank protection module comprises an upper plant planting pool, a purifying pool arranged below the upper plant planting pool and a lower plant planting pol arranged on one side of the bottom of the purifying pool. The ecological bank protection system is formed by connecting the multiple ecological bank protection modules in series. The ecological bank protection module and system are simple in structure and convenient to assemble, demount, operation and maintenance management is convenient, the ecological bank protection module and system are applied to village and town regions incomplete in rainwater pipe network building, initial rainwater pollution can be effectively purified, and the bank protection function is achieved; and power is not needed, and a chemical agent does not need to be added.

The invention discloses an initial rainwater pollution control system which is characterized in that a rainwater inspection well is communicated with a rainwater overflow control well through a rainwater overflow pipe and is communicated with a downstream rainwater inspection well through a downstream rainwater overflow pipe, and the rainwater overflow control well is communicated with a sewage inspection well through a sewage overflow pipe and is connected with the downstream rainwater inspection well through an overflow pipe; a floating ball valve is arranged on the rainwater overflow control well; a rainwater control valve, a downstream rainwater control valve and a sewage control valve are respectively arranged on the rainwater overflow pipe, the downstream rainwater overflow pipe and the sewage overflow pipe; the linkage control device obtains water level information through feedback data of the floating ball valve, judges and obtains state information of initial rainwater inflow and rainwater stopping according to the water level information, and controls all the valves to act according to the water level information and the state information to achieve independent collection and drainage of initial rainwater. The system is small in occupied area, can solve the pollution problem of initial rainwater, and can also avoid rainwater overflow caused by insufficient overflowing capacity of a downstream sewage pipeline.

The invention discloses a quantitative evaluation method for initial rainwater pollution of urban single rainfall based on an SWMM model. The method comprises the following steps: 1, calculating an initial rainwater pollution minimum value; under the control of a pollutant net discharge capacity constraint target, taking gutter inlets at all catchment subareas as discussion objects, sorting the discussion objects according to the production and confluence time of the pollutant concentration in the instantaneous flow ratein a descending order, and then integrating the corresponding instantaneous flow rate until the pollutant net amount contained in the rainwater amount meets the control target of the pollutant net discharge capacity; and (2) calculating an initial rainwater pollution largevalue: under the control of a pollutant net discharge capacity constraint target, controlling the pollutant net discharge capacity of a water outlet to reach the minimum water quantity required to becontrolled under the condition that the requirement is met. The method is a quantitative calculation method for representing the initial rainwater pollution of the urban single rainfall by using therange value, is realized based on the SWMM model, and can scientifically and quantitatively evaluate the initial rainwater pollution water quantity of the urban single rainfall.