Performance of Drought Indices for Ecological, Agricultural, and Hydrological Applications

Earth Interactions

Sergio M.Vicente-Serrano¹ 

关键词: Drought index;    Drought vulnerability;    Agricultural droughts;    Hydrological droughts;    Standardized precipitation evapotranspiration index;    Standardized precipitation index;   

DOI  :  10.1175/2012EI000434.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

AbstractIn this study, the authors provide a global assessment of the performance of different drought indices for monitoring drought impacts on several hydrological, agricultural, and ecological response variables. For this purpose, they compare the performance of several drought indices [the standardized precipitation index (SPI); four versions of the Palmer drought severity index (PDSI); and the standardized precipitation evapotranspiration index (SPEI)] to predict changes in streamflow, soil moisture, forest growth, and crop yield. The authors found a superior capability of the SPEI and the SPI drought indices, which are calculated on different time scales than the Palmer indices to capture the drought impacts on the aforementioned hydrological, agricultural, and ecological variables. They detected small differences in the comparative performance of the SPI and the SPEI indices, but the SPEI was the drought index that best captured the responses of the assessed variables to drought in summer, the seas...

【 授权许可】

Unknown