Ecological risk evaluation method combining landscape pattern and regional ecological risk factor

Abstract

The invention discloses an ecological risk evaluation method combining a landscape pattern and a regional ecological risk factors. The method comprises the following steps: 1) dividing a to-be-evaluated region into risk evaluation units; 2) determining a risk receptor and an ecological endpoint, analyzing a risk source, and reflecting the hazard degree of the risk source to the receptor accordingto the probability and the intensity to obtain the hazard degree (P) of the risk source; 3) researching the contact exposure relation between the risk source and the receptor in the drainage basin, measuring the vulnerability of the ecosystem, representing the external disturbance degrees of different types of ecosystems by landscape disturbance degree indexes, and reflecting the structural vulnerability in the ecosystem by the vulnerability degree indexes to obtain the vulnerability (D) of the ecosystem; 4) representing the potential loss degree of the risk receptor by adopting ecological assets to obtain the loss degree (L) of the risk receptor, and 5) constructing an ecological risk evaluation model, and regarding the ecological risk (ER) as a continuous function of the risk degree (P)of the risk source, the vulnerability (D) of the ecosystem and the loss degree (L) of the risk receptor.

Description

technical field [0001] The invention relates to the technical fields of GIS technology, remote sensing technology and landscape ecology, in particular to an ecological risk assessment method based on GIS technology and remote sensing technology. Background technique [0002] Ecological risk is the risk borne by the ecosystem and its components. It mainly focuses on the possible adverse effects of accidents or disasters with uncertainty on the ecosystem and its components in a certain area. It is uncertain, harmful, and objective. nature, complexity, and dynamism. Ecological risk assessment is the process of evaluating the possibility of adverse ecological impacts and predicting unknown consequences based on limited known data. At present, the regional integration method of geography and ecological process for ecological risk assessment and the idea of ​​coupling landscape and ecological process are the key research contents in the field of ecological risk assessment. Theref...

AI Technical Summary

Problems solved by technology

The current landscape ecological risk assessment method lacks the connection with the ecological loss at all levels of the landscape system when selecting and calculating the pattern index. The ecological risk under the multi-objective guidance not only includes the direct loss suffered by human society, but also pays more attention to the ecological loss of different levels of the system. measures of ecological loss and the potential impact of these ecological losses on human well-being

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