An analysis of the drought in Yunnan, China, from a perspective of society drought severity
An analysis of the drought in Yunnan, China, from a perspective of society drought severity
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DOI：
10.1007/s11069-013-0572-7
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发表时间：
2013-02
期刊：
影响因子：
3.7
通讯作者：
Jiajin Wang;Y. Meng
中科院分区：
文献类型：
--
作者：
Jiajin Wang;Y. Meng
干旱灾害管理不仅需要将气象干旱理解为一种自然灾害，而且还需要评估与经济和人类生活有关的不利社会影响。为了从社会干旱的角度量化干旱的严重程度，提出了一种干旱指数--“社会干旱严重程度指数”（SDSI），并对云南省的干旱进行了分析。在云南SDSI中，干旱严重程度由“适宜”需水量与可利用水资源总量之间的加权差值来表示，并受已建立的Palmer干旱严重程度指数（PDSI）的启发。在技术上，农业，工业和生活用水的历史记录的趋势被用来代表适当的水需求，表观的“径流”被用来代表云南省的可用水资源。云南SDSI显示出干旱严重程度增加的趋势，这是由气象变化和需水量增加共同作用的结果。此外，基于SDSI的云南2010年干旱空间中心与基于PDSI的云南2010年干旱空间中心有较大差异，准确地反映了需水量对干旱严重程度的影响。SDSI被认为是干旱灾害管理和干旱风险治理的有益工具。
Drought disaster management entails not only understanding meteorological drought as a natural hazard but also evaluating the adverse societal impacts related to the economy and human lives. For the purpose of quantifying the drought severity from the perspective of society drought, a drought index, namely “Society Drought Severity Index” (SDSI), was put forward to analyze the drought in Yunnan Province of China. In SDSI for Yunnan, the drought severity was represented by the weighted discrepancy between the “appropriate” water needs and the total available water resources, inspired by the established Palmer Drought Severity Index (PDSI). Technically, the trend in historical water consumption records in agricultural, industrial, and domestic sectors was applied to represent the appropriate water needs; an apparent “runoff” was used to represent the available water resource in Yunnan. The SDSI of Yunnan revealed a trend toward increasing drought severity, which resulted from a combination of meteorological changes and water needs escalation. Moreover, the spatial center of the 2010 drought in Yunnan based on SDSI was different from that identified by PDSI, which exactly reflected the influence of water needs on drought severity. The SDSI was deemed to be a beneficial tool for drought disaster management and drought risk governance.