CN104933289A - Entrophication control technique from the perspective of complex system of social economy-ecological environment - Google Patents
Entrophication control technique from the perspective of complex system of social economy-ecological environment Download PDFInfo
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Abstract
The present invention discloses an entrophication control technique from the perspective of a complex system of social economy-ecological environment. Firstly, a vegetation cover index is used as an indicator representing the vegetation state, a relationship between the vegetation cover and the eutrophication process of water body is established, and then on the basis the systematic dynamics process which discloses that water for social and economical uses affects the eutrophication of water body, the systematic dynamic process is combined with the impact caused by the vegetation cover to the eutrophication. Finally, a systematic dynamics model capable of reflecting the feedback mechanism between the vegetation cover and the eutrophication in a complex system of social economy-ecological environment, to regulate the eutrophication. This technique not only reflects whether the quantity of N and P generated by the socially and economically used water is suitable from the perspective of the complex system of social economy-ecological environment, but also embodies the dynamic feedback process between the vegetation coverage and the eutrophication of the water body. in this way, critical regulation factors are pointed out, the corresponding critical dynamical process is simulated, a dedicated regulation scheme for regulating the eutrophication with respect to the structure of the socially and economically used water is provided, which gives effective guidance to regulation of the source of the eutrophication of water body.
Description
[technical field]
The invention belongs to field for the treatment of of water pollution, specifically relate to the eutrophication control technique under a kind of social economy-ecologic environment compound system visual angle.
[background technology]
Carrying out to Eutrophication Status the groundwork that Effective Regulation is water pollution control, is also an important need of water environment protection.As the important carrier of nutrient and Water Transportation, most important during the water nutrition degree of vegetation in lake etc. regulates, usually as the important measures of water environment restoration of the ecosystem.But, in lake eutrophication Treatment process in the past, main existence two deficiencies: 1) how to regulate and control body eutrophication from the angle of lake terminal improvement, and for the terminal processing techniques of eutrophication water, because the feedback relationship related to is complicated, between the growth conditions of vegetation and the eutrophic state of water body, feedback relationship and process are still comparatively fuzzy, cause eutrophication to regulate and control emphasis indefinite; 2) human social economy's activity produces excessive N, P, lake environment security presence is coerced, accelerate lake eutrophication process, but how stress level quantizes to there is no generally acknowledged Method and Technology, thus also make the quantitative management of social and economic water consumption and sewage be restricted, be difficult to the target fundamentally realizing water environment improvement and restoration of the ecosystem.Given this, N, P input from controlling socio-economic activity generation is needed to set about to the Effective Regulation of lake eutrophication, choose the quantization signifying of vegetation-cover index as vegetation growth state, the impact analysis of N, P total amount change to vegetation-cover index in the change of N, P total amount and water body is affected by coupling social and economic water consumption, N, P is produced whether in right amount by vegetation-cover index instruction social and economic water consumption, adjust water-using structure on this basis, realize the source regulation and control of eutrophication.Therefore, from the visual angle of social economy-ecologic environment compound system, social economy's aspect water yield dynamic change-pollutant sources dynamic change-vegetation growth state change is considered to a compound system dynamic process, the dynamic process of eutrophication is affected by clear and definite social and economic water consumption, feedback relationship between vegetation and body eutrophication and process, optimum range according to vegetation-cover index regulates and controls social and economic water consumption structure and Internal feedback process interactional with water quality, formulating an eutrophication regulation and control scheme that can effect a permanent cure on this basis is field for the treatment of of water pollution problem demanding prompt solution.
[summary of the invention]
For feedback relationship between the growth conditions of vegetation in the existing ecosystem and the eutrophic state of water body and process still comparatively fuzzy, and regulating and controlling water quality can not be carried out from the source of this generation eutrophication of social and economic water consumption, thus the problem causing eutrophication regulating effect not good, the eutrophication control technique based on vegetative coverage, water quality responded under the invention provides a kind of social economy-ecologic environment compound system visual angle, this technology adopts system dynamics method vegetation-cover index and social and economic water consumption to be caused this response relation of body eutrophication to combine, N can not only be produced by the optimum range instruction social and economic water consumption of vegetation-cover index, whether P amount is appropriate, the dynamic feedback process between vegetative coverage degree and body eutrophication state can also be disclosed, point out emphasis regulatory factor and simulate corresponding crucial dynamic process, thus targetedly the adjustment of social and economic water consumption structure is advised scheme, high efficiency regulatory for body eutrophication provides effective guidance.
It is as follows that the present invention solves the technical scheme that these technical matterss adopt: first, specify the response relation of vegetative coverage to body eutrophication process; Secondly, the system dynamics model disclosing vegetative coverage and body eutrophication process is set up.In modeling process, determine the associated change process of each factor affecting body eutrophication; Again, checking system dynamics model of building, and use its key factor carrying out analyzing influence body eutrophication state and significant process; Finally, make body eutrophication index can meet the optimum range of specified conditions according to the analysis result of system dynamics model and the response relation of vegetative coverage and body eutrophication state, thus finally for the high efficiency regulatory of body eutrophication provides guidance.Its concrete step is as follows:
1) collect vegetation-cover index (NDVI) and the corresponding data of body eutrophication index (TN concentration and TP concentration), set up the response relation of vegetative coverage to body eutrophication process.
2) main source of analyzing water body eutrophication, the major influence factors in source and the major effect process of factor.Wherein, in body eutrophication process and society-economy-ecology synthesis system, water yield dynamic changing process is closely related.Process water considers rainfall, evaporation, reveals, sedimentation, the impact of the processes such as inbound traffics, the impact of the wastewater flow rate entered in addition.Meanwhile, provide with water because water body is also required to be the external world, according to the relation of supply and demand water, be converted into the accounting of total water requirements.In addition the process of recycle-water is considered.In the method, water requirement, blowdown flow rate and the reuse water yield mainly consider secondly also have ecological water process from industry, agricultural and life three aspects.
3) data of respective process in step 2 are collected, the system dynamics model that can react body eutrophication production process is built from water yield angle, and by step 1) in vegetation-cover index and the response relation of body eutrophication index include in model, set up the system dynamics model disclosing feedback mechanism between vegetative coverage and eutrophication.
4) system dynamics model that case verification is built, and carry out sensitivity analysis, the key factor of analyzing influence body eutrophication state and significant process.Use system dynamics model of building to carry out scenario analysis and prediction, propose the proposed projects of regulation and control body eutrophication.That is, under society-economy-ecosystem synergy, regulated and controled, for the high efficiency regulatory of body eutrophication provides guidance by the most important process key factor wherein determined by model being affected to water body eutrophication degree.
The present invention has two advantages: 1) by social economy's aspect water yield dynamic change-pollutant sources dynamic change-vegetation growth state change is considered to a compound system dynamic process, discloses the system dynamic process that eutrophication is formed; 2) key factor and the critical process thereof of its Internal feedback mechanism is affected by regulation and control, systematically eutrophic state can be regulated from source, than the physics, biology, the chemical treatment method that control for lake TN, TP concentration in the past, this technology, owing to considering social and economic water consumption to the impact producing eutrophication, more fundamentally can regulate and control eutrophication problem in the long run.
[embodiment]
Below describe principle of work of the present invention and embodiment in detail:
1. collect certain lake vegetation-cover index (NDVI) and the corresponding data of body eutrophication index (TN concentration and TP concentration), set up the response relation of vegetative coverage to body eutrophication process.The exploration of relation between different growing stages vegetative coverage condition and TN and TP concentration, discovery only has vegetation growing period vegetation-cover index and independent TN concentration or TP concentration, and and eutrophic state (TN and TP concentration) between have clear and definite response relation.
2. the main source of analyzing water body eutrophication, the major influence factors in source and the major effect process of factor.Analyzed according in concrete steps in summary of the invention 2, set up the logical diagram of the primary feedback process in this lake, as shown in Figure 1.Utilize the water yield in lake to calculate the concentration of lake TN, TP, thus set up contact between water quality and quantity.And the water yield mainly can be divided into agricultural, industry and life three aspects.The inflow and outflow process of this three aspects water yield calculates mainly through waste water, recycle-water, and waste water, recycle-water directly can by needing water to try to achieve.Need water calculating aspect, as agriculture aspect, calculate by agricultural area and unit area water requirement.In addition, consider precipitation, evaporation, under the process such as to ooze, so whole system contact is become an organic whole.The main equation used in model running is as follows:
1) response equation:
NDVI＝f(CTN，CTP) (1)
In formula, C
tNthe concentration of total nitrogen in water body; C
tPthe concentration of total phosphorus in water; NDVI is vegetation-cover index.
2) Water Environment System:
E＝AW+DW+IW (2)
W
(I，A，D)＝R
(2，4，6)*WD
(T，A，D)(3)
In formula, E is total amount of pollutants discharged; AW is agricultural effluent discharge capacity; DW is sanitary wastewater total emission volumn; IW is industrial wastewater discharge total amount; W (I, A, D) refers to discharged volume of industrial waste water, agricultural effluent discharge capacity and sanitary wastewater discharge capacity respectively; R (2,4,6) refers to industrial wastewater discharge rate, agricultural effluent emission index and sanitary wastewater discharge dose rate respectively; WD (I, A, D) refers to industrial water requirements, agricultural water consumption and resident living water requirement respectively.
3) for water subsystem:
WS＝TWD (4)
In formula, WS is total supply, and TWD is total water requirements.
4) water subsystem is needed:
TWD＝IWD+DWD+AWD+EWD-ARW-DRW-IRW (5)
IWD＝IV*IWD
PM(6)
DWD＝P*DWD
PC(7)
AWD＝BWD+CWD+WWD+RWD (8)
WD
(B，C，W，R)＝WDPH
(B，C，W，R)*LA (9)
In formula, IWD, DWD, AWD, EWD, ARW, DRW and IRW are industrial water requirements, resident living water requirement, agricultural water consumption, Water Requirement, agriculture water-break amount, the life reuse water yield and the industrial reuse water yield respectively; IV is gross industrial output value, and IWDPM is 1,000,000 yuan of industrial outpuut water consumptions; P is population, and DWDPC is resident's water requirement per capita; BWD, CWD, WWD and RWD are the water requirement of sorghum field, milpa, wheatland and large meter respectively; WD (B, C, W, R) is the abbreviation of BWD, CWD, WWD and RWD respectively; WDPH (B, C, W, R) is the unit area water requirement of sorghum field, milpa, wheatland and large meter respectively, and LA is its area.
5) recycle-water subsystem:
RW
(I，A，D)＝R
(1，3，5)*WD
(I，A，D)(10)
In formula, RW (I, A, D) is the abbreviation of IRW, ARW, DRW; WD (I, A, D) is the abbreviation of IWD, AWD and DWD respectively; R (1,3,5) is industrial effluent reusing rate, agriculture recycle-water rate and urbanite water consumption reclamation rate respectively.
6) susceptibility equation
In formula, i=2,4,6, refer to ratio 2, ratio 4 and ratio 6 respectively, i.e. industrial wastewater discharge rate, agricultural effluent emission index and sanitary wastewater discharge dose rate; J represents the time 2001,2002 ..., 2010; Φ is Sensitivity Index, refer to then with the ratio of NDVI and certain ratio the previous year; Δ NDVI represent then with the difference of NDVI the previous year; Δ ratio represent then with the difference of ratio the previous year.
3. collect this lake in Fig. 1 and answer the data of factor and process thereof, as output, water requirement, rainfall amount, evaporation, decline, reveal, flow into flow, flow out flow, the concentration of TN and TP in water body in lake, subsidence rate, the concentration entered in external sewage, concentration etc. in bottom mud in lake, in conjunction with the corresponding relation in 1, set up system dynamics model, as shown in Figure 2.By the dynamic changing process of modeling each factor known.As agricultural water consumption because farmland amount is comparatively fixing, therefore the variation of its water requirement is not too large.And along with population increase, resident living water requirement is increasing year by year.Meanwhile, along with the increase of enterprise, industrial outpuut increases, and industrial water requirements also increases year by year.While resident living water requirement, industrial water requirements increase, Baiyang Lake is that extraneous water supply increases, and meanwhile, the pollutant that Baiyang Lake enters also is increasing year by year, and like this, in lake, nutrient laden situation changes, and also result in the change of vegetative coverage situation.
4. system dynamics model that case verification is built, and carry out sensitivity analysis, the key factor of analyzing influence body eutrophication state and significant process, use system dynamics model of building to carry out scenario analysis and prediction, propose the proposed projects of regulation and control body eutrophication.From modeling, this Graph One factor of waste water rate comparatively recycle-water rate is more responsive to vegetative coverage degree.And in agricultural, industry and life three in waste water rate, because one's respective area is mainly farming region, thus responsive with this Graph One factor of agricultural effluent emission index in this lake.Therefore, in this lake eutrophication regulation process, this factor of wastewater discharge should be regulated and controled emphatically, meanwhile, should based on agricultural emissions source, emphasis is strictly monitored with regard to discharge of wastewater region and website, thus makes regulation and control become more effective and rapid.
Embodiment
Due to this lake TN, TP concentration is higher, eutrophication problem is caused to be given prominence to, by this technical method, from industry, agricultural and resident living three aspects, consider water requirement, blowdown flow rate and the reuse water yield, and in conjunction with the factor of ecological water quantity, establish the system dynamics model that can disclose feedback mechanism between vegetative coverage and eutrophication, specify the discharge of wastewater process that the emphasis regulatory factor of eutrophication process and critical process are agriculture aspects, under the corresponding body eutrophication proposed projects proposed, the TN in this regulation and control region, lake, TP concentration results is as shown in the table:
| Concentration (mg/L) before regulation and control | Concentration (mg/L) after regulation and control | |
| TN | 3.05 | 1.98 |
| TP | 0.51 | 0.27 |
The foregoing is only better embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Accompanying drawing explanation
Fig. 1 is the conceptual model figure of eutrophication control technique under a kind of social economy-ecologic environment compound system visual angle, and this figure discloses the major influence factors and influence process thereof that relate to.Fig. 2 is the control technique illustraton of model of eutrophication based on system dynamics method and vegetative coverage feedback response, wherein scheme the main respond module that (a) part is TN concentration, TP concentration and NDVI index, figure (b) part is the primary feedback process of water quantity and quality.
Claims (2)
1. the eutrophication control technique under social economy-ecologic environment compound system visual angle, it is characterized in that: by selecting vegetation-cover index NDVI (Normalized Difference Vegetation Index) as the index characterizing vegetation state, set up the response relation of vegetative coverage to body eutrophication process, and affect on the basis of system dynamics process of body eutrophication at announcement social and economic water consumption, this system dynamics process is combined with the response of vegetative coverage to body eutrophication, set up the system dynamics model that can be disclosed feedback mechanism between vegetative coverage and eutrophication in social economy-ecologic environment compound system.
2. according to system dynamics model according to claim 1, it is characterized in that: utilize social economy's water yield dynamic changing process on the impact of eutrophication, by to industry, the water requirement of agricultural and life three aspects, blowdown flow rate and the reuse water yield and ecological water quantity are on the impact of body eutrophication, and the feedback relationship analysis between vegetative coverage and eutrophication, instruction social and economic water consumption produces N, whether P amount is appropriate, specify emphasis regulatory factor and the critical process of eutrophication process, proposed projects by regulating and controlling body eutrophication to the adjustment of social and economic water consumption structure is proposed, for the high efficiency regulatory of body eutrophication provides guidance.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108537390A (en) * | 2018-04-20 | 2018-09-14 | 珠江水利委员会珠江水利科学研究院 | A kind of water quantity and quality jointed dispatch analogy method, device and computer-readable medium |
| CN116739133A (en) * | 2023-03-20 | 2023-09-12 | 北京师范大学 | Regional reed NDVI pattern simulation prediction method based on natural-social dual-drive analysis |
| CN116739133B (en) * | 2023-03-20 | 2024-06-04 | 北京师范大学 | Regional reed NDVI pattern simulation prediction method based on natural-social dual-drive analysis |
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| US20080015721A1 (en) * | 2006-07-07 | 2008-01-17 | Spearman Mark L | Methods and systems for employing dynamic risk-based scheduling to optimize and integrate production with a supply chain |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108537390A (en) * | 2018-04-20 | 2018-09-14 | 珠江水利委员会珠江水利科学研究院 | A kind of water quantity and quality jointed dispatch analogy method, device and computer-readable medium |
| CN116739133A (en) * | 2023-03-20 | 2023-09-12 | 北京师范大学 | Regional reed NDVI pattern simulation prediction method based on natural-social dual-drive analysis |
| CN116739133B (en) * | 2023-03-20 | 2024-06-04 | 北京师范大学 | Regional reed NDVI pattern simulation prediction method based on natural-social dual-drive analysis |
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