Title: Research on the vulnerability of ecological water resources under continuous precipitation based on spatial heterogeneity

Authors: Aina Qi; Qi Wu; Guanglei Zhao

Addresses: Shangqiu Institute of Technology, Shangqiu 476000, China ' Henan Vocational University of Science and Technology, Zhoukou 466000, China ' Henan Vocational University of Science and Technology, Zhoukou 466000, China

Abstract: In order to overcome the problem of high error of water resources vulnerability assessment results existing in traditional assessment methods, this paper proposes an assessment method of ecological water resources vulnerability under continuous precipitation environment based on spatial heterogeneity. First of all, the analysis of the effect of continuous precipitation of ecological water environment, in the judgment of water resources developed on the basis of the degree of spatial heterogeneity of the ecological vulnerability of water resources evaluation system, and then set the natural factors and human factors, load factors for the primary index, water quality, water quantity, flood, drought, as secondary indexes, and combining the entropy weight method and the linear weighted method for evaluation of the ecological vulnerability of water resources. The experimental results show that the absolute error of the vulnerability index evaluation results calculated by this method is always less than 0.04, and the relative evaluation error is always less than 3%, indicating that the evaluation results of this method are more reliable and more practical.

Keywords: spatial heterogeneity; ecological water resources; vulnerability evaluation; index system; entropy weight method; continuous precipitation environment.

DOI: 10.1504/IJETM.2021.116826

International Journal of Environmental Technology and Management, 2021 Vol.24 No.3/4, pp.231 - 247

Received: 25 Aug 2020
Accepted: 10 Nov 2020

Published online: 03 Aug 2021 *

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