CN102831324A - Method for computing river environmental capacity based on interval number theory - Google Patents
Method for computing river environmental capacity based on interval number theory Download PDFInfo
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- CN102831324A CN102831324A CN 201210322579 CN201210322579A CN102831324A CN 102831324 A CN102831324 A CN 102831324A CN 201210322579 CN201210322579 CN 201210322579 CN 201210322579 A CN201210322579 A CN 201210322579A CN 102831324 A CN102831324 A CN 102831324A
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Abstract
The invention relates to the field of environmental management such as pollutants discharge reduction, total emission control of pollutants and the like, and discloses a method for computing a river environmental capacity based on an interval number theory aiming at the defect of the current method for computing the river environmental capacity on the aspect of considering the uncertainty. The method comprises the following three steps of firstly, collecting and researching river hydrological parameters and parameters of water quality models, combining a field test, and determining the change range of the river hydrological parameters and the parameters of water quality models; secondly, utilizing the interval number theory to establish a computation model of the river environmental capacity based on the interval number theory; and finally, on the basis of river control unit division, computing to obtain the river environmental capacity interval according to the computing rule of interval numbers. Compared with the traditional method for computing the water environmental capacity, the method is scientific, simple and practical and has the characteristics that the uncertainty of a water environmental system is fully considered, the range of application is wide and the like.
Description
Technical field
The present invention relates to environmental management fields such as pollution emission reduction and gross contamination emission control, relate in particular to a kind of method based on interval number Calculation of River environmental capacity.This method can be widely used in the calculating of various river water environmental capacity, improves the science and the efficiency of management of river basins water environment management.
Background technology
At present, water environment is destroyed extremely common people's concern, and water pollution, shortage of water resources have become the key factor of the restriction sustainable development of socio-economy and living standards of the people raising.China takes up to carry out water prevention and cure of pollution from phase early 1970s, through the effort in more than 30 years, alleviates to some extent to a certain extent though water pollutes, but still is not effectively controlled.Show according to national environmental protection portion " China Environmental State Bulletin in 2011 " data: 2011, in 469 water quality monitoring sections of China's ten big water systems, the section of I-III class accounted for 61.0%; IV-V class and bad V class water quality section ratio then are respectively 25.3% and 13.7%; Main contamination index is COD, five-day BOD and total phosphorus, and the preventing and controlling of visible China water environment pollution are still shouldered heavy responsibilities.Implementing gross contamination emission control is the important means that solves regional water environment pollution problem.At present, the control of China's gross contamination emission is just progressively excessive to the capacity overall control from the target overall control.And calculation of water environmental capacity is the basis and the prerequisite of capacity overall control, and scientific and reliable calculation of water environmental capacity achievement is the important leverage of capacity overall control smooth implementation, and the research of therefore carrying out calculation of water environmental capacity has far reaching significance.
Chinese scholar is from the later stage seventies 20th century environmental capacity of water that begins one's study, and the calculating of environmental capacity of water develops into the calculating of considering environmental capacity of water under the uncertain hydrologic condition under the determinacy hydrologic condition.Like target setting water quality and certain fraction the most withered moon flow down at first such as Zhang Jiaxian (1991), use the environmental capacity of water value in D river, one dimension environmental capacity of water Model Calculation Hubei again; Ceng Weihua etc. (1992) are based on random fluctuation property characteristics such as river discharge, blowdown flow rate, blowdown concentration, and the utilization random theory is studied the river water environmental capacity problem, has proposed risk environmental capacity of water notion and calculating, allocation model; Li Ruzhong etc. (2003) utilization do not know that relevant blind number is theoretical in the mathematics river water environment capacity computational problem under the uncertain information inquired into, and is example with actual water body, and that tries to achieve water environment capacity under the corresponding confidence level confirms expectation value; Chen Dingjiang etc. (2010) use the Monte Carlo simulation method, and the probability distribution of the sensitivity of each input parameter of analytical model and environmental capacity of water value has been set up the Uncertainty Analysis Method by stages of non-point pollution river water environmental capacity.Abroad, particularly American-European developed country, less to this term use of environmental capacity, use assimilation capacity or the maximum pollutant holding capability that allows more.They are doing many researchs aspect the environmental capacity of water model, develop into the model investigation of adopting random theory and system optimization to combine from deterministic models gradually.Like Liebman (1966) etc. parameters such as flow are handled as the determinacy variable, calculated at the water body of administering under the minimum situation of investment by linear programming method then and allow the blowdown level; Revelle usefulness Deterministic Methods such as (1968) asks pollutant to allow discharge capacity with Optimization Model after the objective function linearization; Lohani (1979) etc. as the known probability distributed random variable, study with the probability constraints model flow to the pollutional load distribution of risk of exceeding criterion factory; The random fluctuation property of consideration such as Donald (1985) water quality phenomenon etc. is converted into equivalence qualitative variable really with single order uncertainty analysis method with stochastic variable, and through constructed Optimization Model, sewage draining exit allows discharge capacity thereby can calculate comparatively accurately; Maximal workload every day (TMDL) of the U.S. has also been considered the time variation of pollutant discharge amount, river discharge etc. in the works, and has comprised margin of safety to embody the uncertainty in the TMDL computation process.
The patent of utilizing interval number Theoretical Calculation environmental capacity of water is not arranged at present as yet; The reinforcement of Along with people's ecological environmental protection consciousness; Society is to the attention of quality of water environment; Control enters the pollutant of water body and improves the water body quality has become pressing for of current social stable development, impels the environmental capacity computing method to update.Therefore, on the basis of existing at home and abroad Calculation of River environmental capacity method,, and make it efficient, economical, be widely used in the water pollutant overall control and have very realistic meanings of the calculating of interval number theory application to the fluvial-environment capacity.
Summary of the invention
The present invention is directed to environmental capacity of water at random, uncertainties such as fuzzy and grey, a kind of computing method based on interval number theory fluvial-environment capacity are provided.This method comprises following several steps: at first; Collection research river hydrologic parameter and water quality model parameter; Confirm the variation range of river hydrologic parameter and water quality model parameter in conjunction with site test; Its variation range representes that with the interval interval maximal value of flow and minimum value are represented with typical case's high flow year flow and typical case's low flow year flow respectively; Interval maximal value of flow velocity and minimum value can be represented with the typical case's high flow year and the flow measured value in typical case's low flow year, perhaps adopt the experimental formula estimation; Definite method in comprehensive degradation coefficient interval is with the interval definite method of flow velocity.Then, utilize the theoretical river water environmental calculation of capacity model of setting up based on the interval number theory of interval number, promptly select the calculation of water environmental capacity model according to the river actual conditions, wherein river discharge, flow velocity and comprehensive degradation coefficient become the interval by real number.At last, divide on the basis,, calculate and obtain the environmental capacity interval according to the operation rule of interval number at the river control module.This method has the Water Environment System of taking into full account and has probabilistic characteristics, has science, characteristics such as simple and practical and applied widely.
The invention is characterized in that the uncertainty with Water Environment System combines with the interval number theory; The uncertainty of each hydrologic parameter is represented with an interval value; Use the environmental capacity interval value of interval number operation rule Calculation of River then, satisfied the elasticity management, adapted to wide requirement.
The object of the present invention is to provide a kind of fluvial-environment calculation of capacity method of comprehensively comprehensive, scientifical, applied widely, strong operability, to remedy the deficiency of existing method in elasticity management aspect the total amount of pollutant control.Compare with existing environmental capacity computing method, patent of the present invention has the following advantages:
(1) taken into full account the uncertainty of Water Environment System: represent the variation range of each hydrologic parameter with interval number, the environmental capacity that obtains representes with interval number that also this method has taken into full account the uncertainty of Water Environment System.
(2) satisfied the demand that elasticity is managed: within the environmental capacity interval range, can there be the leeway of oneself's adjustment, oneself's selection, self-management in government and enterprise etc., can improve the dirigibility of management.
(3) usable range is wide: the present invention is used in the calculation of water environmental capacity in any river.
The explanation of accompanying drawing table
Fig. 1 is technology path figure of the present invention.
Embodiment
Specify principle of work of the present invention and embodiment below in conjunction with accompanying drawing:
At first, collection research river hydrologic parameter and water quality model parameter are confirmed the variation range of river hydrologic parameter and water quality model parameter in conjunction with site test, represent its variation range with the interval, and flow is interval representes [Q with typical case's high flow year and typical low flow year flow
Low flow year, Q
High flow year]; Flow velocity can be represented according to typical case's high flow year and typical case's low flow year actual measurement flow velocity, also can estimate [u according to experimental formula
Low flow year, u
High flow year]; Comprehensive degradation coefficient can be represented [K according to measurement method, White's equation or the analysis method of using
1, K
2].Then, utilize the theoretical river water environmental calculation of capacity model of setting up based on the interval number theory of interval number, promptly select the calculation of water environmental capacity model according to the river actual conditions, wherein river discharge, flow velocity and comprehensive degradation coefficient become the interval by real number.At last, divide on the basis,, calculate and obtain the interval [W of environmental capacity according to the operation rule of interval number at the river control module
1, W
2].
Embodiment 1
The Weihe River is the maximum one-level tributary of the Yellow River, also is that the unique effluent sewage in Guanzhong area holds and receives and drainage channel, and the industrial waste water of Shaanxi Province 80% or more passes through the Weihe River with sanitary sewage and discharge according to statistics.Therefore, carry out the research that the stage casing environmental capacity of water is closed in basin, the Weihe River, both can be the basin and realized that overall control provides foundation, also can be river basin planning provides guidance to use for reference, and has important practical significance.At first collect the basic data that the stage casing is closed in the Weihe River; Close stage casing water system characteristics, Weihe River water function zoning and actual demand in conjunction with the Weihe River, to generally changing and divides the calculation of capacity unit in the research section, represent each unit of flow, flow velocity and the comprehensive variation range of degradation coefficient with interval number; Close the stage casing actual conditions according to the Weihe River, select W=Q* (Cs-Co)+K*Q*Cs*x/u, then be: W=[Q based on theoretical stage casing, pass, the Weihe River calculation of water environmental capacity formula of interval number as the calculation of water environmental capacity formula
Low flow year, Q
High flow year] * (Cs-Co)+[K
1, K
2] * [Q
Low flow year, Q
High flow year] * Cs*x/ [u
Low flow year, u
High flow year]; According to the interval number operation rule,, obtain [W between each unit environments capacity region with each parameter substitution calculation of water environmental capacity formula
1, W
2], result of calculation is as shown in table 1.
Claims (1)
1. the invention is characterized in that the uncertainty with Water Environment System combines with the interval number theory, utilizes interval number to represent the variation range of each hydrologic parameter and water quality model parameter; Foundation is based on the theoretical fluvial-environment calculation of capacity model of interval number; According to the operation rule of interval number, calculate between the fluvial-environment capacity region.
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| CN107657912A (en) * | 2017-09-26 | 2018-02-02 | 天津大学 | A kind of river water environmental capacity determining methods based on Mike11 |
| CN107818220A (en) * | 2017-10-31 | 2018-03-20 | 钦州学院 | Evaluation method based on dynamics of ecosystem collective model to estuarine environment capacity |
| CN108197830A (en) * | 2018-01-31 | 2018-06-22 | 扬州大学 | Pollution sources center of gravity generalization is lower to consider the probabilistic small-sized river pollutant carrying capacity computational methods of degradation coefficient |
| CN108280585A (en) * | 2018-01-31 | 2018-07-13 | 扬州大学 | Plan small-sized river pollutant carrying capacity risk estimation methods under arbitrary multiple spot generalization of sewage draining exit |
| CN108320094A (en) * | 2018-01-31 | 2018-07-24 | 扬州大学 | Pollute small-sized river pollutant carrying capacity uncertainty disaster risk estimation method under source summit generalization |
| CN108345990A (en) * | 2018-01-31 | 2018-07-31 | 河海大学 | The uncertain lower midpoint rivers the Gai Hua pollutant carrying capacity of degradation coefficient rationalizes planing method |
| CN109813767A (en) * | 2019-01-31 | 2019-05-28 | 重庆大学 | The measuring method of pollutant biological degradation rate in a kind of urban river |
| CN110335172A (en) * | 2019-07-11 | 2019-10-15 | 天津环科环境规划科技发展有限公司 | Watershed water environment capacity distribution method and device, electronic equipment and storage medium |
| CN111814411A (en) * | 2020-06-12 | 2020-10-23 | 长江水利委员会长江科学院 | Method for calculating rain source type river water environment capacity based on MIKE21 and blind number theory |
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| CN107657912A (en) * | 2017-09-26 | 2018-02-02 | 天津大学 | A kind of river water environmental capacity determining methods based on Mike11 |
| CN107818220A (en) * | 2017-10-31 | 2018-03-20 | 钦州学院 | Evaluation method based on dynamics of ecosystem collective model to estuarine environment capacity |
| CN108280585B (en) * | 2018-01-31 | 2021-08-06 | 扬州大学 | Small-sized river pollutant carrying capacity risk estimation method under arbitrary multi-point generalization of planning sewage discharge outlet |
| CN108197830A (en) * | 2018-01-31 | 2018-06-22 | 扬州大学 | Pollution sources center of gravity generalization is lower to consider the probabilistic small-sized river pollutant carrying capacity computational methods of degradation coefficient |
| CN108280585A (en) * | 2018-01-31 | 2018-07-13 | 扬州大学 | Plan small-sized river pollutant carrying capacity risk estimation methods under arbitrary multiple spot generalization of sewage draining exit |
| CN108320094A (en) * | 2018-01-31 | 2018-07-24 | 扬州大学 | Pollute small-sized river pollutant carrying capacity uncertainty disaster risk estimation method under source summit generalization |
| CN108345990A (en) * | 2018-01-31 | 2018-07-31 | 河海大学 | The uncertain lower midpoint rivers the Gai Hua pollutant carrying capacity of degradation coefficient rationalizes planing method |
| CN108345990B (en) * | 2018-01-31 | 2021-08-31 | 河海大学 | Reasonable planning method for generalization of pollutant carrying capacity of river channel under condition of uncertain degradation coefficient |
| CN108320094B (en) * | 2018-01-31 | 2021-08-06 | 扬州大学 | Small-sized river pollutant carrying capacity uncertainty risk estimation method under pollution source vertex generalization |
| CN109813767A (en) * | 2019-01-31 | 2019-05-28 | 重庆大学 | The measuring method of pollutant biological degradation rate in a kind of urban river |
| CN109813767B (en) * | 2019-01-31 | 2021-05-04 | 重庆大学 | Method for measuring biodegradation rate of pollutants in urban rivers |
| CN110335172A (en) * | 2019-07-11 | 2019-10-15 | 天津环科环境规划科技发展有限公司 | Watershed water environment capacity distribution method and device, electronic equipment and storage medium |
| CN111814411A (en) * | 2020-06-12 | 2020-10-23 | 长江水利委员会长江科学院 | Method for calculating rain source type river water environment capacity based on MIKE21 and blind number theory |
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Application publication date: 20121219 |