Method for building ecology risk assessment model for estuary

Abstract

The invention relates to a method for building an ecology risk assessment model for an estuary; the method comprises the following steps of: building an ecology risk assessment index system covering biological diversity indexes, comprehensive pollution indexes and pressure indexes of social and economic development in an estuary region; determining the standard values of risk upper limits and risk lower limits of the indexes in the index system according to the existing standard values, and carrying out standardization processing on data of stations; determining the weights of the indexes by using an analytical hierarchy process, and obtaining ecology risk values by weighting and adding; carrying out section division on the estuary region; and obtaining the risk value of each section after division, disclosing a space-time distribution pattern of the ecology risk in the estuary region and discriminating main factors resulting in the risks of the estuary region. The method provided by the invention has the advantages of being simple and objective, disclosing the space-time distribution pattern of the ecology risk in the estuary region, accurately accessing and discriminating the current situation of the ecology risk in the estuary region and main risk factors and providing a reliable theory and technical support for establishing a watershed ecology risk early warning mechanism and ecology risk management.

Description

technical field [0001] The invention relates to a method for constructing an estuary ecological risk assessment model, and belongs to the technical field of estuary ecological environment and ecological risk assessment. Background technique [0002] The estuary ecosystem is located at the river estuary, which is an ecological ecotone between the river and the ocean, and also the area where the land-sea interaction is the strongest. At the same time, the estuary area is an area where human activities are concentrated, and its special geographical location and physical and chemical characteristics make it easier to receive and store pollutants from upstream waters, making the estuary area more likely to deteriorate than some areas with poor mobility. After decades of rapid social and economic development in our country, a large amount of pollutants flow into the estuary through rivers and enter the ocean. Most estuaries have serious pollution problems. Serious eutrophication, ...

AI Technical Summary

Problems solved by technology

Due to the above deficiencies in the existing assessment models and methods, the existing estuary ecological risk assessment methods mostly regard the estuary ecosystem as a unified whole, ignoring the time and space of the estuary ecological risk caused by the dynamic changes of salinity and other variables. distribution difference

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