Spatiotemporal Pattern and Influencing Factors of Ecological Degradation Risk in Dongliao River Basin Based on DPSIRM model

Walian Du, Zhijun Tong (), Su Rina, Dao Riao, Xingpeng Liu and Jiquan Zhang
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Walian Du: Northeast Normal University, School of Environment
Zhijun Tong: Northeast Normal University, School of Environment
Su Rina: Northeast Normal University, School of Environment
Dao Riao: Northeast Normal University, School of Environment
Xingpeng Liu: Northeast Normal University, School of Environment
Jiquan Zhang: Northeast Normal University, School of Environment

A chapter in Proceedings of the 10th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention (RAC 2022), 2023, pp 93-100 from Springer

Abstract: ABSTRACT Under natural factors and human disturbance, the watershed ecosystem loses its original equilibrium state and is in a reverse succession process. As a tributary of the Liaohe River Basin, one of the seven major river basins, the Dongliao River Basin has caused environmental pollution and ecological system degradation due to the aggravation of resource and environmental constraints. However, the research on the spatial-temporal pattern and driving mechanism of ecological degradation risk in river basins needs to be further clarified. Therefore, this study took the Dongliao River Basin as the research object, combined with DPSIRM model, entropy weight method, grid GIS and comprehensive evaluation method, studied the temporal and spatial pattern of the Dongliaohe River Basin from 2000s to 2020s, and discussed the influence and interaction mechanism of various factors on the ecological degradation risk of the Dongliao River Basin by using the geographic detector model.The results show that: (1) From 2000s to 2020s, the risk of ecological degradation in the Dongliao River Basin shows a trend of "rising-declining-rising", and the proportion of Class III, Class IV and Class V grids is increasing, indicating that the risk of ecological degradation in the Dongliao River Basin has improved .(2) The results of the geodetector indicate that the human disturbance index is the main driver of the risk of ecological degradation in the Dongliao River Basin, while the ecological quality and the level of education of the inhabitants can also explain the ecological degradation of the Dongliao River Basin very well. (3) The interaction between most of the two drivers in the conceptual framework of DPSIRM is a two-factor enhancement. The results of these studies can provide a scientific basis for rapid improvement of regional ecological quality deterioration.

Keywords: Ecological degradation risk; DPSIRM; Spatial-temporal patterns; Influence mechanism; Dongliao River (search for similar items in EconPapers)
Date: 2023
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DOI: 10.2991/978-94-6463-194-4_14

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