Journal of Geo-information Science >
A Multi-scale Perspective on Water Scarcity Assessment in the Tibetan Plateau
Received date: 2018-10-09
Request revised date: 2019-02-26
Online published: 2019-09-24
Supported by
Strategic Priority Research Program of the Chinese Academy of Sciences(XDA20040401)
National Natural Science Foundation of China(41730645)
Copyright
The total water resource in the Tibetan plateau is abundant. However, some areas within the plateau are faced with severe water scarcity due to the spatial mismatch between available water resources and demands of population and industries. In this study, multiple sources of data were used to evaluate water supply and demand relationships in Qinghai and Tibet. Water scarcity degrees were assessed at the county, prefecture, and province levels in the Tibetan Plateau for 5 year, 10 year, 20 year and 30 year return periods. The effect of spatial scales on water scarcity assessment was analyzed by comparing water scarcity levels based on analyses on different spatial scales. The spatial pattern of water scarcity in the Tibetan Plateau was characterized, and the population and areas that suffered from water scarcity were identified. At the provincial level, no water scarcity occurred in the Tibetan plateau. Three out of 15 prefectures in the Tibetan Plateau were faced with water scarcity. Twenty nine out of 115 counties had water scarcity problems. Water scarce counties were mostly located in relatively highly populated and urbanized areas including River Huang Valley, Qaidam Basin and the basins of Yarlung Zangbo River, Lhasa River and Nianchu River. Overall, the population and areas faced with water scarcity at the county level were larger than at the prefecture and provincial levels. This can be explained by the spatial difference of water uses between counties. At the county level, 56.4% population and 10.4% areas were faced with water scarcity based on 30 years return period. The rank correlation coefficients of water scarcity degrees in different years in water-scarce counties indicate that counties in the same province are likely to experience water scarcity in same periods, while the chance of counties in different provinces experiencing water scarcity in the same year is rather random. Our findings provide useful information for sustainable water resource exploitation toward coordinated urbanization and resources and environmental management in the Tibet Plateau.
Key words: water scarcity; spatial scale effect; Tibetan Plateau; water use; return period
SUN Si'ao , REN Yufei , ZHANG Qiang . A Multi-scale Perspective on Water Scarcity Assessment in the Tibetan Plateau[J]. Journal of Geo-information Science, 2019 , 21(9) : 1308 -1317 . DOI: 10.12082/dqxxkx.2019.180510
图1 1952-2012年青海省与西藏自治区各县域单元多年平均可利用水资源量注:该图基于国家测绘地理信息局标准地图服务网站下载的审图号为GS(2016)2893的标准地图制作,底图无修改。 Fig. 1 Multi-year average available water resource for each county of Qianghai and Tibet from 1952 to 2012 |
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