Abstract
Vulnerability of water environmental is defined as a measure of the degree of water pollution and its susceptibility and resilience under the influence of both human activities and natural causes. Analysis in this study indicates that water environment in a humid and intensive human activity area such as Southern China is more vulnerable to water quality than to water quantity. The vulnerability of water environment is the key element of water security in these regions. This study provided a new approach to quantify the vulnerability of surface water environment in humid areas through a case study in Southern China. Taking the pollution of water environment as an input–output process, the classic Data Envelopment Analysis method (DEA) which has often been used in the management science, was introduced to establish an evaluation model to access the vulnerability of surface water environment. The analysis results for the 7 water resources districts in the Pearl River Basin of China using the SEA method showed that majority of these water resources districts have abundant water resources, greater carrying capacity, and less vulnerable to shortage of water resources and contamination of water environment.
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Abbreviations
- Vulnerability of Surface Water Environment:
-
Vulnerable characteristics to damage from human activities or natural factors and the degree of difficulty in restoring it to its original state and function after being damaged.
- Sensitivity of Water Resources System:
-
Responsiveness of water resources system to external stimuli environment
- Water Resources Exposure:
-
State of being exposed
- Water Resources Adaptive Capacity:
-
Ability to change to suit different environment change
- Water Resources Pressure Index:
-
Ratio between water consumption and total available water resources
- DRASTIC:
-
A method for evaluating groundwater resources vulnerability. DRASTIC method is based on seven parameters: depth of water-table net-recharge, aquifer media, soil media, topography, impact of the vadose, hydraulic conductivity of the aquifer.
- GOD:
-
A method for evaluating groundwater resources vulnerability. GOD method is based on three parameters: groundwater confinement overlying strata, and depth to groundwater.
- SINTACS:
-
A method for evaluating groundwater resources vulnerability. SINTACS method is based on seven parameters: depth to groundwater effective infiltration action, unsaturated zone attenuation capacity, soil/overburden attenuation capacity, hydrogeologic characteristics of the aquifer, hydraulic conductivity range of the aquifer, and hydrologic role of the topographic slope
- EPIK:
-
A method for evaluating groundwater resources vulnerability. EPIK method is based on parameters: epikarst protective cover, infiltration condition, and karst network development.
- DEA:
-
Data envelopment analysis a systematic analysis method in management science
- DMU:
-
Decision-making unit is the water resources districts in this paper.
- θ :
-
Vulnerability index
- x :
-
Input variables sewage discharge and surface water resources in this paper.
- y :
-
Output variables reach length of water quality inferior to Class III in this paper
- u :
-
Weight of input variables
- w :
-
Weight of output variables
- PRB:
-
The Pearl River Basin
- Polluted River Reach:
-
Reach length of water quality inferior to Class III (Chinese Standard of Surface Water Quality GB3838-2002)
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Acknowledgments
The research is financially supported by the National Natural Science Foundation of China (Grant No. 91547202, 51210013, 51479216), the National Science and Technology Support Program (Grant No 2012BAC21B0103), the Public Welfare Project of Ministry of Water Resources (Grant No.201201094, 201301002-02), the project for Creative Research from Guangdong Water Resources Department (Grant No. 2011-11). Our cordial gratitude also should be owed to the Editors-in-Chief, Dr. George P. Tsakiris, and the anonymous reviewers for their professional and pertinent suggestions and comments, which are greatly helpful for further improvements of the quality of this manuscript.
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Xiang, Z., Chen, X. & Lian, Y. Quantifying the Vulnerability of Surface Water Environment in Humid Areas Base on DEA Method. Water Resour Manage 30, 5101–5112 (2016). https://doi.org/10.1007/s11269-016-1471-y
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DOI: https://doi.org/10.1007/s11269-016-1471-y