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Advances in Meteorology
Volume 2016, Article ID 7658015, 10 pages
http://dx.doi.org/10.1155/2016/7658015
Research Article

SPEI-Based Spatiotemporal Analysis of Drought in Haihe River Basin from 1961 to 2010

1State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research (IWHR), Beijing 100038, China
2Water Resources Department, China Institute of Water Resources and Hydropower Research (IWHR), Beijing 100038, China

Received 10 September 2015; Accepted 24 November 2015

Academic Editor: Jorge E. Gonzalez

Copyright © 2016 Meijian Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Under the background of climate change, the monthly accumulated precipitation and monthly averaged temperature of 47 meteorological stations in and around Haihe River Basin (HRB) were analyzed using Standardized Precipitation Evapotranspiration Indices (SPEI) to obtain the temporal variability and spatial distribution of different drought levels during the last 50 years with the support of GIS. The results show that from 1961 to 2010 the drought frequency and degree in annual and seasonal scale are rising and the affecting areas of all degrees of drought have a temporal variability of increasing trend. The ratios that the influencing area of drought, light drought, moderate drought, severe drought, and extreme drought account for the whole HRB area are increasing with gradients of 0.64%/, 0.18%/, 0.31%/, 0.14%/, and 0.01%/, respectively, and there is a climate break point which occurred in 1990; after the comparison of the drought happening probability between 1961 and 1990 and between 1991 and 2010, all degrees of drought occurrence probability have a remarkable rising trend, and the drought concentrating regions moved from the north HRB to the central HRB.