Probabilistic Analysis of Drought Spatiotemporal Characteristics in the Beijing-Tianjin-Hebei Metropolitan Area in ChinaReportar como inadecuado




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1

College of Resources Environment &Tourism, Capital Normal University, Beijing 100048, China

2

State Key Laboratory of Remote Sensing Science, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China

3

School of Mathematical Sciences, Capital Normal University, Beijing 100048, China





*

Author to whom correspondence should be addressed.



Academic Editors: Ricardo Machado Trigo and Robert W. Talbot

Abstract The temporal and spatial characteristics of meteorological drought have been investigated to provide a framework of methodologies for the analysis of drought in the Beijing-Tianjin-Hebei metropolitan area BTHMA in China. Using the Reconnaissance Drought Index RDI as an indicator of drought severity, the characteristics of droughts have been examined. The Beijing-Tianjin-Hebei metropolitan area was divided into 253 grid-cells of 27 × 27km and monthly precipitation data for the period of 1960–2010 from 33 meteorological stations were used for global interpolation of precipitation using spatial co-ordinate data. Drought severity was assessed from the estimated gridded RDI values at multiple time scales. Firstly, the temporal and spatial characteristics of droughts were analyzed, and then drought severity-areal extent-frequency SAF annual curves were developed. The analysis indicated that the frequency of moderate and severe droughts was about 9.10% in the BTHMA. Using the SAF curves, the return period of selected severe drought events was assessed. The identification of the temporal and spatial characteristics of droughts in the BTHMA will be useful for the development of a drought preparedness plan in the region. View Full-Text

Keywords: Drought variability; probabilistic analysis; Reconnaissance Drought Index RDI; drought severity-areal extent-frequency; Beijing-Tianjin-Hebei metropolitan area Drought variability; probabilistic analysis; Reconnaissance Drought Index RDI; drought severity-areal extent-frequency; Beijing-Tianjin-Hebei metropolitan area





Autor: Wanyuan Cai 1, Yuhu Zhang 1,* , Yunjun Yao 2 and Qiuhua Chen 3

Fuente: http://mdpi.com/



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