CN117332959A - River basin river entering pollutant regulation and control method based on section water quality reaching standard - Google Patents
River basin river entering pollutant regulation and control method based on section water quality reaching standard Download PDFInfo
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Abstract
The invention discloses a river basin river entering pollutant regulation and control method based on section water quality standard, which divides a target river basin into a plurality of water quality investigation units by taking each target investigation section as a boundary and obtains the upstream-downstream relationship; monitoring the water quality monitoring value of the outflow section of each water quality inspection unit in real time, and marking the water quality inspection units with the water quality monitoring value exceeding a set allowable limit value as units to be optimized; and (3) sequentially optimizing the water quality of the discharge nodes in each unit to be optimized in the order from downstream to upstream. The invention can regulate and control the sewage entering the river in the target river basin in real time so as to improve the water quality of the whole river basin and ensure that the water quality of each target section reaches the standard.
Description
Technical Field
The invention relates to the technical field of environmental protection engineering and water treatment, in particular to a river basin river entering pollutant regulation and control method based on section water quality standard.
Background
Under the influence of high-density and high-strength human activities, the south watershed in China generally faces the pressure with larger pollution load and complex components, meanwhile, due to extremely complex migration and conversion rules of pollutants, the economic rapid development in the watershed leads to the long-term debilitation of urban point and non-point source pollution prevention and control measures, the serious deterioration of the watershed water quality is finally caused, the environmental problems of existence of black and odorous water bodies in the city and the like are further highlighted in rainy seasons, and particularly, the water quality near the rain and sewage junction section is difficult to meet the target requirement. The water environment pollution problems of the watershed relate to the water safety of the downstream area of the watershed and the water safety of the administrative area where the watershed is located and the watershed itself.
The existing river basin treatment method often adopts a mode of large-section large-row end treatment, and the treatment method cannot fundamentally solve the problem of water prominence faced by the river basin. The current theoretical research of water pollution often neglects the basic practical requirement that the section water quality reaches the standard, and lacks guidance value for practical engineering application. Therefore, an effective river basin river entering pollutant regulating and controlling method based on the standard of the cross-section water quality is needed to ensure that the cross-section water quality is checked to reach the standard all-weather.
Disclosure of Invention
In view of the above, the invention provides a river basin river entering pollutant regulating and controlling method based on the standard of the section water quality, which can regulate and control the river entering process of the sewage of the target river basin in real time so as to improve the water quality of the whole river basin and ensure that the water quality of each target section meets the standard.
In order to solve the technical problems, the invention is realized as follows:
a river basin river entering pollutant regulation and control method based on section water quality standard divides a target river basin into a plurality of water quality investigation units by taking each target investigation section as a boundary and obtains the upstream-downstream relationship;
monitoring the water quality monitoring value of the outflow section of each water quality inspection unit in real time, and marking the water quality inspection units with the water quality monitoring value exceeding a set allowable limit value as units to be optimized; and (3) sequentially optimizing the water quality of the discharge nodes in each unit to be optimized in the order from downstream to upstream.
Preferably, the water quality optimization is to sequentially judge whether the water quality monitoring value of the sewage discharged by each discharge node in the current unit to be optimized exceeds a set allowable limit value from the outflow section of the current unit to be optimized along the downstream to the upstream; if yes, the current emission node does not need to be regulated and controlled; otherwise, regulating the discharge water quality of the current discharge node until the water quality monitoring value of the current discharge node meets the set allowable limit value or the current discharge node reaches the maximum regulation limit, and ending the regulation of the current discharge node;
and carrying out the water quality optimization on the current unit to be optimized until the water quality monitoring value of the outflow section of the current unit to be optimized meets the set allowable limit value or all the discharge nodes in the current unit to be optimized are traversed.
Preferably, after traversing all the emission nodes in the current unit to be optimized, judging whether the water quality monitoring value of the outflow section of the current unit to be optimized meets a set allowable limit value; if yes, finishing the water quality optimization of the current unit to be optimized; otherwise, merging the upstream adjacent water quality inspection unit of the current unit to be optimized with the current unit to be optimized into a new unit to be optimized, and carrying out water quality optimization on the new unit to be optimized until the water quality monitoring value of the outflow section meets the set allowable limit value.
Preferably, the target river basin comprises: river and wetland; setting a wetland investigation section at a wetland river entrance;
for the wetland, taking the wetland investigation section as a target investigation section; taking the wetland investigation section as an outflow section, and taking the wetland as a water quality investigation unit to optimize the water quality;
and for the river course, taking the wetland investigation section as an emission node, and carrying out the water quality optimization on a water quality investigation unit where the wetland investigation section is positioned in the river course.
Preferably, the adjusting and controlling the emission water quality of the current emission node is:
obtaining a discharge regulation limit scheme according to hydrologic period characteristics and water demand; the water discharge quantity and the water quality parameters of the discharge nodes corresponding to different discharge regulation limit schemes are different; according to the emission regulation limit value scheme, the sewage quality of a sewage along a river, a intercepting well, a regulating and accumulating tank, a backflow preventing facility and/or a sewage treatment station which are connected with the current emission node is regulated and controlled in real time;
the hydrographic time period feature comprises: a water-rising period, a water-leveling period or a water-withering period, a one-time precipitation process, a one-time storm process and a one-time sewage discharge process.
Preferably, the set allowable limit value is a water quality target value corresponding to a relatively stricter standard of national examination section standards and provincial examination section standards published for each target examination section.
Preferably, the target survey section includes: administrative division boundary section, water function division boundary section, river confluence section, hydrologic station corresponding position section, regulation facility corresponding position section, water quality national examination section and water quality province examination section.
The beneficial effects are that:
1. according to the invention, the pollutant emission monitoring and scheduling based on the view angle of the target section are realized by dividing the water quality investigation units of the target river basin, so that the water quality of each target section is ensured to reach the standard, and the method has more practical application significance for the hydraulic engineering practice. Meanwhile, based on the division mode, the water quality inspection unit and the emission node which need to be optimally adjusted are judged and optimally adjusted one by one from downstream to upstream, and the water quality inspection unit with problems and the emission node which causes the problem of the section water quality can be quickly found, so that the sewage entering the river of the target river basin is regulated and controlled in real time.
2. According to the invention, through distinguishing different hydrologic period characteristics and adaptively discharging regulation and control limit values, the all-weather effectiveness of the regulation and control method is realized, and the risk that different pollution discharging characteristics corresponding to the different hydrologic period characteristics possibly bring up to standard to an examination section is reduced as much as possible.
3. The invention focuses on the sewage discharge amount of the sewage discharge outlet of the river, effectively and accurately diagnoses and identifies the sewage discharge node of the river affecting the control section, can better adjust the key process of sewage entering the river, and has better practical application guiding value for the regulation and control of a sewage treatment system and the real-time monitoring of the sewage discharge of enterprises.
4. According to the invention, through abstract treatment of river network, key sections and related sewage treatment equipment, an integrated visual river network model comprising a target section, an emission node and a water quality investigation unit can be established, so that the nodes inside and outside the river are monitored conveniently, and the distribution and calculation of flow and water quality are carried out.
5. According to the invention, the wetland investigation section is used as a bidirectional target investigation section with an indefinite flow direction for analysis, so that the effective analysis, monitoring and optimization of the water quality of the wetland water system which is positioned outside a river and is difficult to analyze through the upstream-downstream relation are realized.
Drawings
FIG. 1 is a schematic diagram of a water quality inspection unit based on an embodiment of the invention;
FIG. 2 is a schematic flow chart of a control method according to an embodiment of the present invention;
the system comprises a 1-water quality inspection unit, a 1.1-first water quality inspection unit, a 1.2-second water quality inspection unit, a 1.3-third water quality inspection unit, a 1.4-fourth water quality inspection unit, a 2-discharge node, a 3-wetland, a 4-target inspection section, a 4.1-first target inspection section, a 4.2-second target inspection section, a 4.3-third target inspection section, a 4.4-fourth target inspection section, a 5-wetland inspection section and a 6-river channel.
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
The invention provides a river basin river entering pollutant regulation and control method based on section water quality standard, which has the following core ideas:
dividing a target river basin into a plurality of water quality inspection units 1 by taking each target inspection section 4 as a boundary, and obtaining the upstream-downstream relationship of the water quality inspection units; monitoring the water quality monitoring value of the outflow section of each water quality inspection unit 1 in real time, and marking the water quality inspection units 1 with the water quality monitoring value exceeding a set allowable limit value as units to be optimized; and (3) sequentially optimizing the water quality of the discharge nodes 2 in each unit to be optimized in the order from downstream to upstream.
Therefore, the invention realizes pollutant emission monitoring and scheduling based on the view angle of the target section by dividing the water quality inspection unit 1 of the target river basin, thereby ensuring that the water quality of each target section reaches the standard, and having more practical application significance for hydraulic engineering practice. Meanwhile, based on the division mode, the invention judges and optimizes the units and the nodes which need to be optimized and adjusted one by one from downstream to upstream, can quickly find out the water quality investigation unit 1 with problems and the discharge node 2 which causes the problem of the section water quality, regulates and controls the sewage river entering process of the target river basin in real time, and can improve the response efficiency to the problem of the river basin water pollution and the optimizing effect to the water quality of the whole river basin compared with the existing analysis and adjustment scheme from top to bottom.
The present invention will be further described in detail with reference to the following three examples.
In the first embodiment of the invention, the target river basin is divided into a plurality of water quality inspection units 1 by taking each target inspection section 4 as a boundary, and the upstream-downstream relationship is obtained. As shown in fig. 1, a fourth water quality inspection unit 1.4, a third water quality inspection unit 1.3, a second water quality inspection unit 1.2 and a first water quality inspection unit 1.1 are arranged in sequence from downstream to upstream. For the first water quality inspection unit 1.1, the first target inspection section 4.1 is the inflow section and the second target inspection section 4.2 is the outflow section. For the second water quality inspection unit 1.2, the second target inspection section 4.2 is the inflow section and the third target inspection section 4.3 is the outflow section. For the third water quality inspection unit 1.3, the third target inspection section 4.3 is an inflow section and the fourth target inspection section 4.4 is an outflow section. Similarly, for the fourth water quality inspection unit 1.4, the fourth target inspection section 4.4 is the inflow section, and so on.
In this embodiment, the water quality monitoring value of the outflow section of each water quality inspection unit 1 is monitored in real time, and for the water quality inspection units 1 with the water quality monitoring value exceeding the set allowable limit value, the water quality of each discharge node 2 in the river channel 6 is optimized up to standard in sequence from the current section which does not meet the set allowable limit value, until the water quality of the current section meets the requirement.
A second embodiment of the present invention, as shown in fig. 2, comprises the following specific steps:
step 1, obtaining a spatial distribution diagram of river network section information of a target river basin, wherein the spatial distribution diagram comprises the following steps:
step 101, acquiring administrative division diagrams, water function division diagrams, water quality national examination province section position diagrams, DEM elevation diagrams of a research river basin and sewage interception system information along the river channel 6.
Further, the sewage interception system along the river channel 6 comprises a main sewage interception pipeline along the river, a regulation facility (a intercepting well and a regulation tank), a backflow prevention facility, a sewage treatment station and/or a sewage outlet along the river. And determining the position information of the pollutant space discharge point of the river sewage outlet in the target flow field and the main pollutant type information.
Step 102, using ARCGIS software to spatially superimpose planar data such as DEM elevation map, administrative district drawing, water function district drawing, water quality national examination province section drawing, river channel 6 underwater topography drawing and the like with river channel 6 section information discharge point-like data to obtain a spatial distribution map of river channel 6 section information of a river basin.
According to the invention, through abstract treatment of the river network, key sections and related sewage treatment equipment, an integrated visual river network model comprising the target investigation section 4, the emission node 2 and the water quality investigation unit 1 can be established, the nodes inside and outside the river can be monitored conveniently, and the distribution and calculation of the flow and the water quality can be carried out.
Step 2, establishing a river basin river section management system model, which comprises the following steps:
step 201, setting a river inlet drain outlet on a river section distribution diagram as an internal river discharge node, namely a discharge node 2, setting a intercepting well, a regulating reservoir, a backflow preventing facility, a sewage treatment station and the like in a regulating and accumulating facility as external river nodes correspondingly connected with the discharge node 2, setting river abstraction in a river section space distribution diagram of a river basin as a river network hydraulic internal connection line, and setting a river section sewage interception main pipeline as a river network hydraulic external connection line. And taking the intersection of the administrative division diagram, the water function division diagram and the hydraulic connection line in the river network, the national examination and provincial examination section of water quality, the wetland river entrance and the reservoir water outlet as target investigation sections 4.
Each of the intra-river discharge nodes further corresponds to node data comprising: node serial number, node space position, water quantity and water quality parameters. Each target survey section 4 further corresponds to section data comprising: serial number of section, space coordinates of section, water quantity and water quality parameters. All serial numbers are numbered from top to bottom according to the water flow direction along the river network.
Step 202, according to the pollutant discharge condition of the river, administrative division, water function division, hydrologic stations and regulation facility systems, dividing a river section model into sections, dividing a target river basin into a plurality of water quality inspection units 1 by taking each target inspection section 4 as a boundary, and obtaining the water environment division of the upstream river 6 of each inspection section.
And judging the upstream-downstream relationship between each water quality inspection unit 1 and the target inspection section 4 along the water flow direction of the river network area according to the DEM elevation chart on the river basin section space distribution diagram. In each water environment partition, sequencing and numbering the water quality inspection units 1 sequentially from upstream to downstream, and marking the priority inspection section according to the inspection importance degree.
Step 203, determining all emission nodes 2 and water quality control targets of target investigation sections 4 in each water quality investigation unit 1, and constructing a river section list containing the sequence numbers of nodes inside and outside a river network where the water quality sections are located, the distance from the beginning of a river section and the type information of control pollutants.
And 204, performing water quality and water quantity distribution on various water behaviors of the discharge node 2, and distributing the water quality and water quantity distribution to a river channel hydraulic connection line to obtain a river basin river channel section management system model.
Step 3, optimizing the river network section management system model of the river domain to obtain an optimized river section management system model, which specifically comprises the following steps:
sequentially judging whether the current water quality monitoring value of each section meets the limit range of the target upper limit value; if yes, the water quality of the discharge node 2 correspondingly contained in the water quality inspection unit 1 is not required to be adjusted, and an optimized ecological flow management system model is obtained; if not, the water quality of the discharge node 2 in the water quality inspection unit 1 corresponding to the section is adjusted, and an optimized river network section management system model is obtained.
The specific method for adjusting the water quality of the discharge node 2 in the water quality inspection unit 1 corresponding to the section comprises the following steps:
and step A0, obtaining information such as relevant time and space for pollutant discharge by each discharge node 2.
A1, judging whether the water quality monitoring value parameter of the sewage discharged by each discharge node 2 in the water quality inspection unit 1 meets the limit of a target upper limit value or not from the descending to the ascending order; if yes, the discharge node 2 in the water quality inspection unit 1 does not need to be adjusted, and the step A3 is continued; if not, obtaining the nodes to be regulated which do not meet the limiting requirements, and continuing to step A2.
The target upper limit value is: the country and the place respectively published the relative strictest standard among the water quality target values of river basin river network sections. On the basis that the water quality monitoring value of the discharge node 2 meets the regulation and control requirement of the limiting range of the target upper limit value, different discharge regulation and control limit value schemes are calculated through an artificial intelligence algorithm according to the real-time hydrologic period characteristics and the water demands under different situations. The discharge water quantity and water quality parameters of the discharge node 2 corresponding to different discharge regulation limit schemes are different. And (3) regulating and controlling the sewage quality of the sewage along the river, the intercepting well, the regulating and accumulating tank, the anti-backflow facility and/or the sewage treatment station which are connected with the current discharge node 2 in real time according to the discharge regulation and control limit value scheme.
Wherein the different hydrographic time period characteristics comprise: the water-saving device has the specific hydrologic characteristics of a water-increasing period or a dead water period, a water-reducing process, a storm process, a sewage discharge process and the like.
According to the invention, through distinguishing different hydrologic period characteristics and adaptively adjusting the emission regulation limit value, the all-weather effectiveness of the regulation method is realized, and the risk that different pollution emission characteristics corresponding to the different hydrologic period characteristics possibly bring up to the standard to the examination section is reduced as much as possible.
And step A2, starting from the discharge node 2 closest to the target section in the water quality inspection unit 1 to be optimized, and carrying out point-by-point adjustment on the node to be adjusted along the downstream and upstream. For each discharge node 2, the water quality of the sewage discharged by the discharge node 2 is regulated and controlled by carrying out real-time monitoring and adjustment on the operation conditions of relevant facilities of the external nodes of the river channel obtained in the step 201. And stopping adjusting when the target section water quality parameter value meeting rate reaches the expected requirement or when the maximum adjustable limit value of the node to be adjusted is reached.
When the water quality of the discharge node 2 is regulated, the water quality is gradually regulated from the original water quality parameter of the node to be regulated to the maximum adjustable limit value. When the pollutant at the river inlet of the river channel 6 meets the maximum water quality standard and the flow value of the corresponding target section meets the required limit value, the current discharge node 2 reaches the maximum adjustable limit value. If the current discharge node 2 still fails to meet the water quality requirement of the target outflow profile when the maximum adjustable limit is reached, the adjustment of the discharge node 2 is terminated and the upstream adjacent discharge node 2 is continued to be adjusted.
Step A3, judging whether the water quality monitoring value of the outflow section of the current unit to be optimized meets the limit range of the target upper limit value after all the discharge nodes 2 to be regulated in the current water quality inspection unit to be optimized stop regulating; if yes, finishing the optimization of the current unit to be optimized; otherwise, merging the upstream adjacent water quality inspection unit 1 of the current unit to be optimized with the current unit to be optimized into a new unit to be optimized, and optimizing the new unit to be optimized until the water quality monitoring value of the outflow section meets the limit range of the target upper limit value; and simultaneously checking whether the corresponding drainage basin has unplanned sewage discharge.
The invention focuses on the sewage discharge amount of the sewage discharge outlet of the river, effectively and accurately diagnoses and identifies the sewage discharge node of the river affecting the control section, can better adjust the key process of sewage entering the river, and has better practical application guiding value for the regulation and control of a sewage treatment system and the real-time monitoring of the sewage discharge of enterprises.
And 4, regulating and controlling the emission of the river-entering pollutants section by section and point by adopting an optimized river basin river network section management system model, and taking the optimized emission of the river-entering pollutants of each emission node 2 as a river-entering emission threshold value of pollutants of the river basin river network section management system model under the characteristic of the current hydrologic period. Under the condition that the hydrologic period characteristics are not changed, ensuring that the water quality of the target section reaches the standard in real time by ensuring that the pollutant discharge does not exceed the river entering discharge quantity threshold; and (3) under the condition that the hydrologic period characteristics are changed, repeatedly operating the regulation and control method of the steps 1-4 to ensure that the water quality of the target section reaches the standard under all-weather conditions.
In a third embodiment of the present invention, on the basis of the second embodiment, by abstracting the river network, the key section and the sewage treatment related equipment of the river basin, the water quality inspection units 1 with the target river basin being defined by the target inspection sections 4 and the information of the discharge nodes 2 in the water quality inspection units 1 are obtained.
The target river basin in this embodiment includes: river course 6 and wetland 3. In order to monitor and optimize the water quality of the wetland 3 of each water quality inspection unit 1 which is difficult to be connected into the river channel 6 through the upstream-downstream relationship, the embodiment sets the wetland inspection section 5 at the river mouth of the wetland 3, the wetland inspection section 5 is different from the target inspection section 4, the water flow direction of the target inspection section 4 is determined, and the upstream-downstream relationship between the adjacent water quality inspection units 1 is also determined. The wetland 3 is a water system connected to the river channel 6 but outside the river channel 6, and the entrance of the water system has different inflow or outflow possibilities according to actual conditions, so that the wetland survey section 5 must be considered as a bidirectional section with an indefinite flow direction.
Therefore, for water quality optimization of the wetland 3, the wetland observation section 5 is regarded as one target observation section 4. And the wetland investigation section 5 is taken as an outflow section, and the wetland 3 is taken as a water quality investigation unit 1 to optimize the water quality. Meanwhile, for water quality optimization of the river channel 6, the wetland investigation section 5 is used as a discharge node 2 on the river channel 6, and the water quality optimization is carried out on the water quality investigation unit 1 where the wetland investigation section 5 is located in the river channel 6. Therefore, the effective analysis, monitoring and optimization of the water quality of the wetland 3 water system which is positioned outside the river channel 6 and is difficult to analyze through the upstream-downstream relation are realized.
On the basis of the model construction, the embodiment further monitors the water quality monitoring value of the outflow section of each water quality inspection unit 1 in real time, and marks the water quality inspection units 1 with the water quality monitoring value exceeding the set allowable limit value as units to be optimized; and carrying out water quality optimization on the units to be optimized in sequence along the downstream to upstream. For each unit to be optimized, the sewage discharge condition information of each discharge node 2 is recorded sequentially from downstream to upstream, wherein the sewage discharge condition information comprises the water quality and the water quantity of the discharged sewage. Preliminary water quality standard optimization is performed for the discharge nodes 2 exceeding the discharge standard of the corresponding treatment facilities so that the discharge standard of the corresponding treatment facilities is respectively satisfied by the sewage discharged by each discharge node 2. After the preliminary water quality reaches the standard and is optimized, if the effluent water quality of the current unit to be optimized still does not meet the set allowable limit value, the average optimization is carried out on the effluent water quality of all the discharge nodes 2 in the current unit to be optimized. And the average optimization is that the treatment pressure value in the form of percentage is obtained according to the current treatment burden and the maximum treatment capacity of the sewage treatment facilities corresponding to each discharge node 2, and the water quality of the sewage discharged by each discharge node 2 is optimized while the treatment pressure value corresponding to each discharge node 2 is kept equal, so that the outflow water quality of the current unit to be optimized is controlled within the set allowable limit value.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A river basin river entering pollutant regulation and control method based on section water quality standard is characterized in that a target river basin is divided into a plurality of water quality investigation units (1) by taking each target investigation section (4) as a boundary, and the upstream-downstream relation of the water quality investigation units is obtained;
monitoring the water quality monitoring value of the outflow section of each water quality inspection unit (1) in real time, and marking the water quality inspection units with the water quality monitoring value exceeding a set allowable limit value as units to be optimized; and (3) sequentially optimizing the water quality of the discharge nodes (2) in each unit to be optimized in the order from downstream to upstream.
2. The river basin river-entering pollutant regulating and controlling method based on the standard of the section water quality according to claim 1, wherein the water quality optimization is to sequentially judge whether the water quality monitoring value of the sewage discharged by each discharge node (2) in the current unit to be optimized exceeds a set allowable limit value from the outflow section of the current unit to be optimized along the downstream to the upstream; if yes, the current emission node (2) does not need to be regulated and controlled; otherwise, regulating the discharge water quality of the current discharge node (2) until the water quality monitoring value of the current discharge node (2) meets a set allowable limit value or the current discharge node (2) reaches a maximum regulation limit, and ending the regulation of the current discharge node (2);
and carrying out the water quality optimization on the current unit to be optimized until the water quality monitoring value of the outflow section of the current unit to be optimized meets the set allowable limit value or all the discharge nodes (2) in the current unit to be optimized are traversed.
3. The river basin river entering pollutant regulating and controlling method based on the standard of the section water quality according to claim 2, wherein after all the discharge nodes (2) in the current unit to be optimized have been traversed, judging whether the water quality monitoring value of the outflow section of the current unit to be optimized meets a set allowable limit value or not; if yes, finishing the water quality optimization of the current unit to be optimized; otherwise, merging the upstream adjacent water quality inspection unit (1) of the current unit to be optimized with the current unit to be optimized into a new unit to be optimized, and carrying out water quality optimization on the new unit to be optimized until the water quality monitoring value of the outflow section meets a set allowable limit value.
4. The river basin river-entering pollutant control method based on the achievement of the cross-sectional water quality of claim 1, wherein the target river basin comprises: a river channel (6) and a wetland (3); setting a wetland investigation section (5) at the river entrance of the wetland (3);
regarding the wetland (3), taking the wetland investigation section (5) as a target investigation section (4); taking the wetland investigation section (5) as an outflow section, and taking the wetland (3) as a water quality investigation unit (1) to optimize the water quality;
for the river channel (6), taking the wetland investigation section (5) as a discharge node (2), and performing the water quality optimization on a water quality investigation unit (1) where the wetland investigation section (5) is positioned in the river channel (6).
5. The river basin river entering pollutant regulating and controlling method based on the section water quality reaching the standard according to claim 2, wherein the regulating and controlling the discharge water quality of the current discharge node (2) is as follows:
obtaining a discharge regulation limit scheme according to hydrologic period characteristics and water demand; the water discharge quantity and the water quality parameters of the discharge nodes (2) corresponding to different discharge regulation limit schemes are different; according to the emission regulation limit value scheme, the sewage quality of a sewage along a river, a intercepting well, a regulating and accumulating tank, a backflow preventing facility and/or a sewage treatment station which are connected with the current emission node (2) is regulated and controlled in real time;
the hydrographic time period feature comprises: a water-rising period, a water-leveling period or a water-withering period, a one-time precipitation process, a one-time storm process and a one-time sewage discharge process.
6. The river basin entering pollutant control method based on the standard of the section water quality reaching the standard according to any one of claims 1 to 5, wherein the set allowable limit value is a water quality target value corresponding to a relatively stricter standard of national examination section standards and provincial examination section standards published for each target examination section (4).
7. The river basin entering pollutant control method based on the standard of the section water quality according to any one of claims 1 to 5, characterized in that the target survey section (4) comprises: administrative division boundary section, water function division boundary section, river confluence section, hydrologic station corresponding position section, regulation facility corresponding position section, water quality national examination section and water quality province examination section.
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