CN113204878A - Pollution source pollution discharge permission amount distribution method based on environment capacity - Google Patents
Pollution source pollution discharge permission amount distribution method based on environment capacity Download PDFInfo
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- 238000009826 distribution Methods 0.000 title claims abstract description 27
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- 239000003344 environmental pollutant Substances 0.000 claims abstract description 31
- 231100000719 pollutant Toxicity 0.000 claims abstract description 31
- 230000007613 environmental effect Effects 0.000 claims abstract description 23
- 230000004044 response Effects 0.000 claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 14
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Abstract
The invention discloses a pollution source pollution discharge permission amount distribution method based on environmental capacity, which comprises the following operation steps: step 1: collecting data; step 2: establishing a pollutant input and water quality response relation; and step 3: establishing an environment capacity simulation model and calculating environment capacity; and 4, step 4: and establishing an environment capacity distribution model, and distributing the water environment capacity to each pollution source. The method comprehensively considers the pollution load contribution rate of the pollution source, the GDP output value, the number of the born employment population, the pollution discharge intensity, the river characteristics and other factors, determines the pollution discharge allowable amount of the pollution source in the drainage basin, and has important significance for the water environment management of the drainage basin.
Description
Technical Field
The invention belongs to the technical field of water environmental engineering, and particularly provides a pollution source pollution discharge allowable quantity distribution method based on environmental capacity.
Background
The pollution discharge permission allocation implemented in China comprises two aspects: a blowdown license allocation based on a target total amount and a blowdown license allocation based on water quality improvement. The existing approved pollution discharge license is distributed based on the target total amount of pollution discharge license, is not directly related or responded to the water environment quality, determines the permitted discharge concentration and the discharge limit value on the basis of the industrial discharge standard and the local discharge standard, and does not fully consider the watershed water environment quality condition, the water function target and other water environment management requirements.
Disclosure of Invention
In order to support the realization of the 'ten items of water' standard-reaching scheme and improve the water environment scientific and technological management capability of the drainage basin, the invention discloses a pollution source pollution discharge permission allocation method based on environmental capacity, simultaneously considering factors such as standard water quality of a section, differentiated management of different types of control units and the like, fully considering economic, environmental and social attributes of a pollution source, and laying a foundation for fine management of the water environment of the drainage basin.
The technical scheme of the invention is as follows: the pollution source pollution discharge permission amount distribution method based on the environmental capacity comprises the following operation steps:
step 1: collecting data;
step 2: establishing a pollutant input and water quality response relation;
and step 3: establishing an environment capacity simulation model and calculating environment capacity;
and 4, step 4: and establishing an environment capacity distribution model, and distributing the water environment capacity to each pollution source.
In step 1, investigating and collecting hydrological, hydraulic and water quality data of a basin, including concentration values of flow velocity, flow, water level and pollution factors; and collecting the data of a sewage discharge outlet, a branch flow, a water intake and a pollution source in the flow area, wherein the data comprises sewage treatment technology, discharge amount, a sewage discharge direction and mode, pollutant discharge concentration, a pollution source GDP yield value, the number of employment people borne by the pollution source, the water resource usage amount of the pollution source, water intake amount and water intake mode.
In step 2, combining hydrologic conditions and upstream and downstream water quality limiting conditions to calculate pollutant input and water quality response, the expression is as follows:
Cij＝aij×Wj
in the formula, CijThe concentration of pollutant discharged by a pollution source j at a water quality section i is mg/L; a isijThe response coefficient (mg · s/L · g) of the jth pollution source on the ith control section can be obtained by water quality simulation calculation; wjIs the pollutant discharge amount (g/s) of the jth pollution source.
In step 3, the calculation of the environmental capacity is targeted at the maximum pollutant emission, and the expression is as follows:
an objective function:
constraint equation:
wherein M is the environmental capacity (t/a); wjThe number of the pollution emission sources is j, and n is the number of the pollution emission sources; a isijThe response coefficient (mg · s/L · g) of the jth pollution source on the ith control section can be obtained by water quality simulation calculation; bi is the background concentration (mg/L) of the ith control section; siThe water quality target (mg/L) of the ith control section is obtained.
In step 4, establishing a point source pollution discharge allowable quantity distribution model, and determining distribution coefficients of all pollution sources; selecting a plurality of parameters of employment population carrying capacity, GDP output value and pollutant discharge amount of the pollution sources as evaluation indexes, weighting each index by adopting an expert consultation mode, comprehensively calculating distribution coefficients of the pollution sources, and finally determining the pollutant discharge permission amount of each pollution source, wherein the expression is as follows:
wherein M is the environmental capacity (t/a); wj *Apportioning amount of contamination for jth contamination Source (t/a)；kjDistributing coefficients for the jth pollution source; wj,maxThe maximum emission (t/a) of the jth pollution source.
Determining the distribution coefficient kj of the pollution sources, selecting X parameters of the pollution sources such as employment population carrying capacity, GDP production value and pollutant discharge amount as evaluation indexes by adopting a method of combining qualitative analysis and quantitative analysis, weighting each index by adopting an expert consultation mode, comprehensively calculating the distribution coefficient of each pollution source, and finally determining the pollution discharge permission amount of each pollution source. The expression is as follows:
in the formula kjDistributing coefficients for the jth pollution source; f. of1、f2…fxFor each index weight coefficient, it is calculated by weighting by expert group, and f1+f2+…+fx＝1；Pj、Gj…DjIs a parameter index of the jth pollution source, Pj’、Gj’…Dj' is the value of the parameter for the jth pollution source.
The invention has the following beneficial effects:
the method is based on the response relation between the discharge amount of the pollution source and the water quality, and calculates the maximum allowable pollutant carrying amount in the flow field by utilizing linear programming; under the principle of keeping fairness and benefit, a pollution discharge permission distribution model is established, and social, economic and environmental attributes of pollution sources are fully reflected; through the water environment simulation of the drainage basin, the drainage basin management target is refined into the management of the pollution source, and technical support is provided for the implementation of a pollution discharge permission system.
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FIG. 1 is a flow chart of the operation of the present invention.
Detailed Description
The following embodiments of the present invention will be described in conjunction with practical applications, and are only intended to illustrate the present invention and not to limit the scope of the present invention.
The invention relates to theories comprising a water quality simulation theory, a planning optimization theory and the like, and the invention determines the response relation between a pollution source and water quality by using the water quality simulation theory on the basis of actual monitoring and numerical simulation, determines the environmental capacity of a basin by using the planning optimization theory, combines qualitative analysis and quantitative analysis, and determines the pollution discharge allowable distribution amount of each pollution source.
Taking a certain level of branch in the Liaohe river basin as an example, because the width and the depth of the river in the river basin are small, pollutants can be rapidly and uniformly mixed on the whole section after being discharged into the river in a point source mode, and therefore, a one-dimensional water quality model is selected for calculation in the embodiment.
Step 1: data acquisition
Investigating and collecting hydrological, hydraulic and water quality data of a water area, including flow velocity, flow, water level, concentration value of pollution factors and the like;
collecting data of pollution sources, branches, water intakes and the like in a flow area, wherein the data comprises sewage treatment technology, discharge amount, pollution discharge direction and mode, pollutant discharge concentration, pollution source GDP (gas-liquid separation) production value, the number of employment people borne by the pollution sources, pollution source water resource usage amount, water intake mode and the like;
generalizing pollution sources, and determining the production-collection relation of each pollution source with branch flows and main flows; determining parameters by using a hydraulic and hydrological calculation method, such as: flow, flow rate, degradation coefficient.
Step 2: establishing a pollutant input and water quality response relation, wherein the expression is as follows:
Cij＝aij×Wj
in the formula, CijThe concentration of the pollutant input of the pollution source j formed at the water quality section i is mg/L, aijThe response coefficient (mg · s/L · g) of the jth pollution source on the ith control section can be obtained by water quality simulation calculation; wjIs the pollutant discharge amount (g/s) of the jth pollution source.
aijObtaining the following result according to a differential equation of a one-dimensional steady-state attenuation law of the river pollutants:
in the formula, QpDesign flow for upstream incoming water, (m)3S); u is the average flow velocity of the river section, (m/s); x is the distance along the way, (km); k-attenuation coefficient, (d)-1)。
And step 3: an environment capacity simulation model is constructed, the maximum pollutant discharge amount is used for calculating the environment capacity, and the expression is as follows:
an objective function:
constraint equation:
wherein M is the environmental capacity (t/a); wjThe number of the pollution emission sources is j, and n is the number of the pollution emission sources; a isijThe response coefficient (mg · s/L · g) of the jth pollution source on the ith control section can be obtained by water quality simulation calculation; b isiThe background concentration (mg/L) of the ith control section; siThe water quality target (mg/L) of the ith control section is obtained.
And 4, step 4: establishing an environment capacity distribution model, and distributing the distributable water environment capacity to each pollution source; the model expression for capacity allocation is:
wherein M is the environmental capacity (t/a); wj *Apportioning the amount of pollution (t/a) for the jth pollution source; k is a radical ofjAssign a coefficient, W, to the jth pollution sourcej,maxThe maximum emission (t/a) of the jth pollution source.
And establishing a point source pollution discharge allowable quantity distribution model and determining the distribution coefficient of each pollution source. In the embodiment, 3 parameters of employment population carrying capacity, GDP output value and pollutant discharge amount of the pollution sources are selected as evaluation indexes, the indexes are weighted in an expert consultation mode, distribution coefficients of the pollution sources are comprehensively calculated, and pollution discharge permission amount of the pollution sources is finally determined. The expression is as follows:
in the formula kjDistributing coefficients for the jth pollution source; f. of1、f2、f3For each index weight coefficient, it is calculated by weighting by expert group, and f1+f2+f3＝1；Pj、Gj、DjThe index of employment population carrying capacity, GDP output value and pollutant discharge amount of the jth pollution source; pj’、Gj’、Dj' is the actual numerical value of employment population carrying capacity, GDP production value and pollutant discharge amount of the jth pollution source.
The allowable amount of pollution discharge of the pollution source in the basin can be calculated according to the process.
The invention provides a method for distributing pollution discharge permission aiming at the requirements of environmental management, based on environmental capacity and considering the characteristics of distribution, emission and the like of pollution sources, refines the basin management target into the management of the pollution sources and provides technical support for the implementation of a pollution discharge permission system.
The technology disclosed by the method of the invention is not limited to the content disclosed by the technical method, and the corresponding modification and change are carried out according to the technical characteristics.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. Pollution source pollution discharge permission amount distribution method based on environmental capacity is characterized by comprising the following operation steps:
step 1: collecting data;
step 2: establishing a pollutant input and water quality response relation;
and step 3: establishing an environment capacity simulation model and calculating environment capacity;
and 4, step 4: and establishing an environment capacity distribution model, and distributing the water environment capacity to each pollution source.
2. The pollution source pollution discharge permission distribution method based on the environmental capacity as claimed in claim 1, wherein in the step 1, hydrologic, hydraulic and water quality data of the basin, including concentration values of flow rate, water level and pollution factor, are investigated and collected; and collecting the data of a sewage discharge outlet, a branch flow, a water intake and a pollution source in the flow area, wherein the data comprises sewage treatment technology, discharge amount, a sewage discharge direction and mode, pollutant discharge concentration, a pollution source GDP yield value, the number of employment people borne by the pollution source, the water resource usage amount of the pollution source, water intake amount and water intake mode.
3. The environmental capacity-based pollutant source pollutant discharge permission distribution method according to claim 1, wherein in step 2, pollutant input and water quality response calculations are performed in combination with hydrologic conditions and upstream and downstream water quality limiting conditions, and the expression is as follows:
Cij＝aij×Wj
in the formula, CijThe concentration of pollutant discharged by a pollution source j at a water quality section i is mg/L; a isijThe response coefficient (mg · s/L · g) of the jth pollution source on the ith control section can be obtained by water quality simulation calculation; wjIs the pollutant discharge amount (g/s) of the jth pollution source.
4. The pollution source discharge permission allocation method based on environmental capacity as claimed in claim 1, wherein in step 3, the environmental capacity is calculated with a pollutant discharge amount as a maximum target, and the expression is:
an objective function:
constraint equation:
wherein M is the environmental capacity (t/a); wjThe number of the pollution emission sources is j, and n is the number of the pollution emission sources; a isijThe response coefficient (mg · s/L · g) of the jth pollution source on the ith control section can be obtained by water quality simulation calculation; bi is the background concentration (mg/L) of the ith control section; siThe water quality target (mg/L) of the ith control section is obtained.
5. The environmental capacity-based pollution source emission permission distribution method according to claim 1, wherein in step 4, a point source emission permission distribution model is established, and distribution coefficients of the pollution sources are determined; selecting a plurality of parameters of employment population carrying capacity, GDP output value and pollutant discharge amount of the pollution sources as evaluation indexes, weighting each index by adopting an expert consultation mode, comprehensively calculating distribution coefficients of the pollution sources, and finally determining the pollutant discharge permission amount of each pollution source, wherein the expression is as follows:
wherein M is the environmental capacity (t/a); wj *Apportioning the amount of pollution (t/a) for the jth pollution source; k is a radical ofjAnd distributing coefficients for the discharge permission of the jth pollution source.
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Cited By (3)
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| CN115796439A (en) * | 2022-10-27 | 2023-03-14 | 天津大学 | Quantitative analysis method for changing influence of water intake of irrigation area engineering on river water environment |
| CN115829196A (en) * | 2022-10-25 | 2023-03-21 | 中国环境科学研究院 | Land-source pollutant load distribution method and device, computer equipment and medium |
| CN116090710A (en) * | 2023-04-11 | 2023-05-09 | 湖北君邦环境技术有限责任公司 | Management method, system, electronic equipment and medium for enterprise pollution discharge permission |
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