Method for evaluating river basin accumulation environment risks

A technology of environmental risk and watershed, applied in the field of environmental risk and management, environmental science, can solve the problems of weak evaluation and spatial research, and achieve a wide range of applications

Inactive Publication Date: 2012-02-29
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0008] Watersheds belong to the category of regions. The most important feature of watershed environmental risks is that water flow is the main risk transmission medium. Watershed environmental risks must fully consider the characteristics of the accumulation of upstream and downstream environmental risks. With the outbreak of major water pollution accidents such as the Songhua River pollution accident, the Tuojiang R

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  • Method for evaluating river basin accumulation environment risks
  • Method for evaluating river basin accumulation environment risks
  • Method for evaluating river basin accumulation environment risks

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Embodiment approach

[0020] Firstly, certain simplifications and assumptions are made on the watershed-scale environmental risk system: (1) The risk source only considers the environmental risks of chemical industrial parks along the river (river), and only considers the types of accidents that have a major impact on the water body of the watershed, such as leakage and abnormal discharge; (2) Mobile source accidents in river transportation are not considered; (3) In addition to impacts on natural ecosystems, environmental accidents have risk impacts on areas passing through water intakes and irrigation. If there is no water intake along the river (river), then It is considered that there is no risk; (4) On the scale of the watershed, the chemical park along the river (river) is abstracted as a risk source point, and the environmental accident risk is a point source risk.

[0021] Referring to the one-dimensional steady-state river mixed attenuation model, calculate the risk accumulation value of po...

Embodiment 1

[0023] A certain watershed has superior natural location conditions, high population density, extremely developed social economy, and the chemical and petrochemical industry is the leading industry in this area. Chemical parks are densely distributed within the watershed, and water sources and water intakes are mostly distributed along the river. The environmental risks of the watershed are very severe. According to the characteristics of the watershed environmental risk system, the environmental risk evaluation index system is constructed. On the basis of quantifying the environmental risk hazard of the chemical industry park, the cumulative environmental risk field of the watershed is calculated based on GIS. According to the grading standard of the environmental risk evaluation index, as shown in Table 1 , calculate the environmental risk value of the watershed and obtain the environmental risk classification map of the watershed, as shown in the attached image 3 shown.

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Abstract

Aiming at the characteristics of various risk sources, upstream and downstream accumulation, complex and multiple risk receptors and the like of river basin environment risks, the invention discloses a method for evaluating river basin accumulation environment risks on the basis of GIS (Geographic Information System) technology effective insertion components. The method comprises the following steps of: firstly, with a chemical engineering park along the river within a river basin range as an environment risk evaluation point source, quantifying environment risk source dangers through relevant quantitative models such as a fire model (Exergy); secondly, establishing a GIS space accumulation model, coupling a river basin dispersion one-dimensional water quality mode, calculating a river basin environment risk accumulation field, acting the river basin environment risk accumulation field on a service range of a water taking hole through the water taking hole; thirdly, evaluating the vulnerability of an environment acceptor along the river; and finally, determining the level of the region risks through risk strengths and operation results of acceptor vulnerability evaluation levels, and generating a river basin environment risk ranking graph on the basis of a space display function of a GIS. The method can be widely applied to regional environment risk evaluation, regional industry layout plan, soil utilization plan, environment risk management, and formulation of pollution accident prevention measures and emergence plans, and has the characteristics of high efficiency, low cost, high precision, wide appliance range and the like.

Description

technical field [0001] The invention relates to the fields of environmental science, environmental risk and management, in particular to a method for comprehensively evaluating the cumulative environmental risk of a river basin by using GIS and Excel technology. This evaluation method can be widely used in regional industrial layout planning, land use planning and environmental risk management, as well as the formulation of pollution accident prevention measures and emergency plans. Background technique [0002] With the continuous expansion of the degree and scale of my country's industrialization, industrial development on a regional scale has become a new growth point of my country's economy. my country's regional development model usually takes industry, especially the chemical industry as the leading industry, and economic development zones or industrial parks as the carrier. However, in the process of rapid industrialization, the discharge of a large number of toxic a...

Claims

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Application Information

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IPC IPC(8): G06Q10/00
Inventor 杨志峰张力小
Owner BEIJING NORMAL UNIVERSITY
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