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Affected by both climate change and human activities, groundwater resources in arid inland river basins have become overwhelmed
.
However, this important resource faces serious challenges – a series of problems such as falling groundwater table, soil salinization, desertification, and vegetation degradation – exacerbating
the fragile ecological environment.
In arid regions where the exploitation of water resources is close to or exceeds the limit, the issue of the resilience of groundwater systems has attracted much attention
.
Therefore, identifying the spatial distribution of groundwater resilience is of great significance
for the rational use and effective management of groundwater resources.
In view of the above problems, the team of oasis soil and water processes and mechanisms of the State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, constructed a method to evaluate the spatial distribution of groundwater resilience based on the hydrological, meteorological, geological and groundwater buried data of the Hotan River Basin, combined with the resilience index (CRS and pi) and evidence conflict theory (Dempster-Shafer, DS) model
。
The results show that as a quantitative standard for groundwater resilience, CRS and pi can solve the problem of long-term change of groundwater system resilience, and the areas with relatively high resilience are mainly distributed in the upstream oasis irrigation area and near the downstream river, and the relatively low area is mainly distributed in the area with large underground depth and far from the
river channel.
Based on the evidence layer composed of two resilience indicators and groundwater regulators, the DS model was constructed, and the accuracy of the groundwater resilience zoning map was 51.
9% (CRS) and 66.
7% (pi),
respectively 。 Groundwater resilience (pi) zoning maps are divided into five categories: very low (Bel value of 0-0.
072), low (0.
072-0.
171), medium (0.
171-0.
458), high (0.
458-0.
786), high (>0.
786), accounting for 3%, 30%, 30%, 22%, and 15%
of the total area of the area, respectively.
The study realized the prediction of the spatial distribution of groundwater resilience in the Hotan River Basin, which provided a scientific basis
for the planning and management of groundwater resources by relevant departments in Hotan area.
The results were published in the Journal of Hydrology: Regional Studies
under the title "Identifying groundwater resilience zones in an arid inland basin using GIS-based Dempster-Shafer theory.
" The first author of the paper is Wang Yuehui, master of Xinjiang Institute of Biological Geography, and the corresponding author is Shi Fengzhi
, associate researcher of Xinjiang Institute of Biological Geography.
The research was supported
by the Western Scholars Program of the Chinese Academy of Sciences.
Link to the article: https://doi.
org/10.
1016/j.
ejrh.
2022.
101232
Figure 1 Research method flowchart
Figure 2.
Spatial distribution of groundwater resilience based on Dempster-Shafer model: (a) CRS, (b) pi.
