CN106706459A - Method for determining natural rainfall water quality parameter W1 affected by air pollution - Google Patents
Method for determining natural rainfall water quality parameter W1 affected by air pollution Download PDFInfo
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Abstract
The invention discloses a method for determining a natural rainfall water quality parameter W1 affected by air pollution, and belongs to the intersection fields of municipal engineering, environmental engineering, sponge city construction and computer model software parameter determination. A thought of determination of pollutant concentration in natural rainfall to indirectly reflect an air pollution condition is put forward, an experimental method for determining the natural rainfall pollutant concentration is established, and a result can be used as a part of earth surface runoff water quality parameters in a scouring process simulated by an SWMM model. The accuracy of SWMM software in rainfall runoff water quality simulation can be improved, and a technical support is provided for application of the SWMM software in the rainfall runoff water quality simulation.
Description
Technical field
Influence natural rainfall water quality parameter W is polluted the present invention relates to one kind1Determination method, belong to city's political and ideological work
The crossing domain that journey, environmental project, sponge urban construction and computer model software parameters determine.
Background technology
SWMM (Storm Water Management Model) is U.S. environment protection also known as storm flood administrative model
A dynamic precipitation-Runoff Simulation of exploitation is affixed one's name to, except for a certain single precipitation event or long-term in simcity
Water can be used for simulation of water quality.The precipitation that its runoff each sub-basin of module section integrated treatment occurs, runoff and pollution
Load.Its confluence module part then carries out water transmission by pipe network, channel, retaining and treatment facility, water pump, regulator etc..
The model can be with the water quality and water of runoff produced by trace simulation different time each sub-basin of step-length any time, and often
Situations such as flow of individual pipeline and river course reclaimed water, the depth of water and water quality.
SWMM models can dynamic simulated rainfall runoff, but simulated flow water quality single or continuous aspect more
Conventional, i.e., in terms of the research of city surface source pollution, the model is that simulation assessment causes the optimal of non-point source pollution loading effectively reduction
Control measures (BMPs).In the U.S., Canada and the country such as Europe, the model be all made to solve the draining of locality water and
Quality problem, in analysis about preventing flooded conditions, city great rainfall management planning and the reduction of confluence of rainwater and sewage tubing giving sufficient strength dirty
During dye load aspect, the model can preferably be simulated effect.In China with the popularization of sponge urban construction, city life
The planning of state system, the transport conditions of city overland runoff water quality can be reflected by computer model, in addition LID measures
By the water quality situation after the setting prediction sponge urban construction to SWMM Model water quality parameters under effect, so as to reflect that LID arranges
Apply the effect in sponge urban planning and construction.
SWMM model parameters are Environmental Protection Agencies according to the land use pattern in the U.S., earth's surface pollution situation and environment matter
What the factors such as amount determined, it is used with limitation.By landform and the otherness of urban life environment, what its parameter had
Limitation leads to not directly be simulated and use in China's city overland runoff water quality.Current SWMM water quality mould at home
In the use of type, majority indiscriminately imitates the parameter on external SWMM models handbook, without the set of parameter for being adapted to China's national situation, while
There is no a set of rating method on SWMM water quality parameters.This patent is aimed to provide and a set of determines SWMM water quality according to China's national situation
Wash-off Model parameter W is pollutant concentration (mg/L)；B is unit area accumulation of pollutants amount (kg/104m2)；Parameter S1To wash away
Coefficient, S2To wash away index；Parameter q is unit area run-off (mm/h)；C in Accumulation Model1For maximum increase may and C2For
The isoparametric method of rate constant of propagation.It is inherited and is improved on the basis of original SWMM water quality models, and is carried
Go out the assay method of complete set, respectively：《A kind of method for directly obtaining parameter W in SWMM water quality models》、《One kind determines
The method of rainwash pollutant parameter W in SWMM softwares》、《One kind determines the pollution of rainwash containing different underlying surface in SWMM
The method of thing parameter W》、《One kind is polluted influence natural precipitation water quality parameter W1Determination method》、《One kind is without air shadow
Ring rainwash water quality parameter W in lower SWMM0Determination method》、《A kind of side for directly obtaining SWMM water quality model parameters B
Method》、《A kind of method of accumulation parameter determination in determination SWMM softwares》、《A kind of side of determination SWMM water quality Wash-off Model parameters
Method》, eight assay methods altogether.
Atmospheric Flow and rainfall are the main cleaning approach of atmosphere pollution removal, and pollution of circulation thing is in rainfall in air
Enter in natural precipitation under souring, one of important sources as runoff pollution, therefore SWMM software Wash-off Models
It is middle to need to increase influence of the atmosphere pollution content to Rainfall Runoff content.Pollutant load can be indirect in natural precipitation
The accumulation situation of pollutant in reaction this area's air, the determination of its assay method can be SWMM softwares in rainfall runoff water quality mould
Application in plan provides technical support and data reference.
SWMM (Storm water Management Model) model is the earliest urban storm storm water man- agement mould for proposing
One of type, is to solve the problems, such as storm water man- agement model that increasingly serious urban rainwater is proposed by Environmental Protection Agency.It is one
The forecast simulation model of the quite varied urban storm runoff water of individual content and water quality, can be used for urban runoff single incident
Simulation can be used for long-term (continuous) simulation.At present, shown in SWMM softwares Wash-off Model such as formula (1).
W=S1qS2B (1)
In formula：W --- pollutant concentration, mg/L；
S1--- coefficient of scouring；
S2--- wash away index；
The speed of q --- runoff, m3/h；
B --- unit area amount of pollutant accumulation, g/m2。
The formula simply considers rainfall early stage surficial deposit pollutant in the simulation for carrying out rainfall runoff scour process
Accumulation situation, consider air in accumulate polluter.However, rainfall to earth's surface in addition to washing away, in air
The pollutant of accumulation enters in natural precipitation under the souring of rainfall, and then species to pollutant in rainfall runoff and contains
Pollutant during amount is produced to be influenceed, therefore the present invention increases to air when SWMM softwares carry out the simulation of rainfall runoff scour process
The consideration of accumulation factor, shown in Wash-off Model such as formula (2), so as to further improve SWMM Model water qualities simulation precision and the model
Application value.
W=S1qS2B+W1 (2)
In formula：W1--- atmospheric pollution effect natural precipitation water quality parameter, mg/L；
The content of the invention
One kind is polluted influence natural rainfall water quality parameter W1Determination method, it is characterised in that SWMM washes away mould
Type is improved shown in formula such as formula (2)：
W=A1qS2B+W1 (2)
In formula：B is unit area accumulation of pollutants amount (kg/104m2)；W is pollutant concentration (mg/L)；S1It is to wash away
Number；S2To wash away index；Q is unit area run-off (mm/h)；W1It is atmospheric pollution effect natural precipitation water quality parameter, mg/L；
The determination method of atmospheric pollution effect natural precipitation water quality parameter is comprised the following steps：
1. natural precipitation sampled point is selected in the difference in functionality area of survey region respectively；
2. using rainfall collection device collection natural precipitation, pollutant concentration X in natural precipitation in the same time is determined nott；
3. changed with time P using pluviograph (Fig. 1) record rainfallt；
4. State of Air pollution is obtained by the natural precipitation total amount of pollutant indirectly, determines the W in formula (2)1。
X in formula (3)tIt is natural rainfall water concentration (mg/L) under t；PtIt is natural rainfall amount with the distribution of time,
mm；W1It is the mean concentration (mg/L) of whole field rainfall.
Brief description of the drawings
Fig. 1 pluviographs
Advantage of the present invention：
(1) propose to reflect pollutant accumulation situation in air indirectly using the content of pollutant in natural precipitation；
(2) experimental technique of indirect determination atmosphere pollution accumulation situation is established；
(3) as SWMM model scour process rainwash pollutant concentrations of the natural rainfall that will be polluted
Point, improve the precision of SWMM modeling rainfall-runoff process.
Specific embodiment：
1. nature is selected in the difference in functionality area (such as living area, industrial area, shopping centre, cultural district) of survey region respectively
Rainfall sampled point, sampled point surrounding is tried one's best and avoids tall and big trees or building；
2. using rainfall collection device collection natural precipitation, natural precipitation sampling apparatus uses tipping-bucket rain-gauge (JZ-
05, Beijing nine divisions of China in remote antiquity space), collect and determine not pollutant concentration X in natural precipitation in the same timet；
3. changed with time P using pluviograph record rainfallt。
4. State of Air pollution is obtained by the natural precipitation total amount of pollutant indirectly, determines the W in formula (2)1。
X in formula (3)tIt is natural rainfall water concentration (mg/L) under t；PtIt is natural rainfall amount with the distribution of time,
mm；W1It is the mean concentration (mg/L) of whole field rainfall.
1. before rainfall, tipping-bucket rain-gauge is arranged at sampled point spaciousness, it is to avoid tall and big trees or building are to rainwater
Interference；
2. the pluviograph recording sheet drawn by tipping-bucket rain-gauge in rainfall determines rainfall with the time
All rainwater being collected into while all rainwater landed in tipping-bucket rain-gauge are collected, and are moved to 5L by change
It is to be measured in beaker；
3. foundation《Water and effluent monitoring analysis method》(fourth edition) is detected to pollutant concentration in collection rainwater.Its
Middle SS is measured using gravimetric method, and COD is determined using potassium dichromate method, and ammonia nitrogen uses Berthelot spectrophotometry (light splitting
Photometer) determine.
4. using all kinds of pollution mean intensity values in formula (3) calculating natural precipitation.
5. State of Air pollution is reflected by the concentration value of the natural precipitation pollutant being affected by atmospheric effects, determines formula (2)
In W1。
Specific effect：
Seminar in 2016 gathers 12 rainfalls in the western school district of Beijing University of Technology, and pollution is collected and measured by the method
The mean concentration scope of SS is 58.87~220mg/L in thing, and the mean concentration scope of COD is, 5.82~39.13mg/L, NH4-
The mean concentration scope of N is 0.28~7.94mg/L, and the mean concentration scope of TN is 2.36~9.45mg/L, by each pollutant
Numerical value is compared with the mean concentration of whole rainfall water sample is collected separately, it is known that the error range of pollutant all 3%~10%, then
Reflect true rainfall water pollution situation.The mean concentration W of rainfall water quality is can determine that in SWMM water quality models1。
Claims (1)
1. one kind is polluted influence natural rainfall water quality parameter W1Determination method, it is characterised in that SWMM Wash-off Models are such as
Shown in formula (1)：
W=S1qS2B+W1 (1)
In formula：B is unit area accumulation of pollutants amount (kg/104m2)；W is pollutant concentration (mg/L)；S1It is coefficient of scouring；S2
To wash away index；Q is unit area run-off (mm/h)；W1--- atmospheric pollution effect natural precipitation water quality parameter, mg/L；
The determination method of atmospheric pollution effect natural precipitation water quality parameter is comprised the following steps：
1. natural precipitation sampled point is selected in the difference in functionality area of survey region respectively；
2. using rainfall collection device collection natural precipitation, pollutant concentration X in natural precipitation in the same time is determined nott；
3. changed with time P using pluviograph record rainfallt；
4. by the way that the concentration value of decline rainfall and correspondence pollutant determines the W in formula (3) in the same time1Value.
X in formula (2)tIt is natural rainfall water concentration (mg/L) under t；PtIt is natural rainfall amount with the distribution of time, mm；W1
It is the mean concentration (mg/L) of whole field rainfall.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111401598A (en) * | 2019-06-26 | 2020-07-10 | 中国市政工程华北设计研究总院有限公司 | Urban single-site rainfall initial rainwater pollution quantitative evaluation method based on SWMM model |
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| CN103020424A (en) * | 2012-11-22 | 2013-04-03 | 北京师范大学 | Method for estimating non-point source pollution load of northern plain farmland area based on rainmaking experiments |
| CN105389469A (en) * | 2015-11-09 | 2016-03-09 | 中山大学 | Automatic calibration method of storm water management model parameters |
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Patent Citations (3)
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| CN102201034A (en) * | 2011-04-26 | 2011-09-28 | 北京师范大学 | Method for estimating nonpoint source pollution load of village adjacent to river |
| CN103020424A (en) * | 2012-11-22 | 2013-04-03 | 北京师范大学 | Method for estimating non-point source pollution load of northern plain farmland area based on rainmaking experiments |
| CN105389469A (en) * | 2015-11-09 | 2016-03-09 | 中山大学 | Automatic calibration method of storm water management model parameters |
Non-Patent Citations (2)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111401598A (en) * | 2019-06-26 | 2020-07-10 | 中国市政工程华北设计研究总院有限公司 | Urban single-site rainfall initial rainwater pollution quantitative evaluation method based on SWMM model |
| CN111401598B (en) * | 2019-06-26 | 2023-07-07 | 中国市政工程华北设计研究总院有限公司 | Quantitative evaluation method for urban single-site rainfall initial rainwater pollution based on SWMM model |
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