Annual Runoff is Highly Linked to Precipitation Extremes in Karst Catchments of Southwest China
Annual Runoff is Highly Linked to Precipitation Extremes in Karst Catchments of Southwest China
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DOI：
10.1175/jhm-d-17-0032.1
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发表时间：
2017-10
影响因子：
3.8
通讯作者：
Zhenwei Li;Xianli Xu;Chaohao Xu;Meixian Liu;Kelin Wang;Bofu Yu
中科院分区：
文献类型：
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作者：
Zhenwei Li;Xianli Xu;Chaohao Xu;Meixian Liu;Kelin Wang;Bofu Yu
喀斯特地貌占地球大陆面积的7%-12%，为全球25%的人口提供水资源。气候，特别是频繁的极端气候，可能会极大地影响年径流，特别是在气候敏感地区，如西南喀斯特地区。智能水资源管理迫切需要了解气候和径流之间的联系。因此，本研究选取了5个不同碳化岩覆盖率（11% ~ 64%）的流域，对1957-2011年西南地区年径流变化的主导气候变量进行了分析。由于气候变量是高度相互依赖的，因此使用偏最小二乘回归（PLSR）来阐明径流与17个气候变量之间的联系。结果表明，年径流的主导气候因子为年总降水量、降雨日数、强降水量、强降水日数、暴雨日数和暴雨日数....
AbstractKarst landforms cover 7%–12% of the Earth’s continental area and provide water resources for 25% of the global population. Climate, particularly frequent climate extremes, may greatly affect the annual runoff, especially in climate-sensitive regions such as a karst area of southwest China. Knowledge of the linkage between climate and runoff is urgently needed for smart water resources management. This study therefore selected five catchments that have different carbonized rock coverage (from 11% to 64%) to detect the dominant climatic variables driving changes in annual runoff for the period of 1957–2011 in southwest China. Because climatic variables are highly codependent, a partial least squares regression (PLSR) was used to elucidate the linkages between runoff and 17 climatic variables. Results indicated that the dominant climatic factors driving annual runoff are annual total precipitation, rainy days, heavy precipitation amount, heavy precipitation days, rainstorm amount, and rainstorm days....