Advances in Earth Science ›› 2005, Vol. 20 ›› Issue (9): 1022-1028. doi: 10.11867/j.issn.1001-8166.2005.09.1022
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YANG Xiaoli 1,2;YANG Xingguo 1;MA Pengli 1,2;WANG Ruosheng 2;DONG Yanxiong 2
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YANG Xiaoli;YANG Xingguo;MA Pengli;WANG Ruosheng;DONG Yanxiong. MODIFICATION AND APPLICATIONS OF PDSI FOR MID AND EASTERN GANSU PROVINCE[J]. Advances in Earth Science, 2005, 20(9): 1022-1028.
On the base of fundamental and method of the PDSI ，a further modified PDSI for mid and eastern Gansu province was developed.Stations，calculation of potential evapotranspiration and runoff etc，have been revised in this index. With this modified index，the PDSI was computed at 20 representative stations from 1961 to 2000，and the computed Index was compared with the recorded drought situation. the basic characteristics of drought was analysed .It is found that the further PDSI can reflect the severity of drought in this region，and is applicable for mid and eastern Gansu.