|Table of Contents|

Risk Assessment of Ecological Security of Regional Soil and Water Resources Based on Dynamic Perspective

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年05
Page:
107-115
Research Field:
Publishing date:

Info

Title:
Risk Assessment of Ecological Security of Regional Soil and Water Resources Based on Dynamic Perspective
Author(s):
XU Dongyang1; REN Yongtai2; CHENG Kun2
(1.College of Engineering,Northeast Agricultural University,Harbin,Heilongjiang 150030;2.College of Science,Northeast Agricultural University,Harbin,Heilongjiang 150030)
Keywords:
DPSIR model; contribution; risk value; agricultural water use
PACS:
-
DOI:
10.11937/bfyy.20182482
Abstract:
The ecological security of water and land resources is the long-term guarantee for the sustainable development of human society.Based on the resource environment and socio-economic perspective,this study improved the DPSIR model.According to the complexity and uncertainty of the water resources system,the contribution weight of each indicator in different years to the ecological security risk value of water and soil resources was determined,and the comprehensive evaluation method was combined,according to Heilongjiang 2003—2016 risk assessment of ecological security of water and soil resources.The results showed that the ecological security risk level of water and soil resources was Grade IV (higher risk),and the overall trend was to decline first and then rise.The main reason was the agricultural and industrial output value of ten thousand yuan of water consumption that was decreasing,which leaded to the decline of the ecological safety risk value.The late rising trend was due to the decrease of the proportion of the ecological environment water in the negative indicator,which leaded to the increase of the ecological safety risk value.In 2003—2016,the impact system had a significant impact on the ecological security risk level of water and soil resources.The response system had the highest ecological security risk value and low safety,and the driving system had the highest safety.The obstacle system of ecological security construction had changed from social economy to resource environment.The main reason was that the proportion of agricultural water was too high,which seriously restricted the reduction of ecological security risk value.

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Last Update: 2019-04-03