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研究进展-Multisource data based integrated drought monitoring in the Huai River basin, China
发布时间: 2017-10-11  

Peng Sun, Qiang Zhang, Qingzhi Wen, Vijay P. Singh, Peijun Shi

[Peng Sun, Qingzhi Wen]. College of Territorial Resources and Tourism, Anhui Normal University, Wuhu 241000, China;

[Qiang Zhang, Peijun Shi]. Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education, Beijing Normal University, Beijing 100875, China.

[Qiang Zhang, Peijun Shi]. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China.

[Qiang Zhang, Peijun Shi]. Faculty of Geographical Science, Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing 100875, China.

[Vijay P. Singh]. Department of Biological and Agricultural Engineering and Zachry Department of Civil Engineering, Texas A&M University, College Station, Texas, USA.

 

ABSTRACTDrought monitoring is critical for early warning of drought hazard. This study attempted to develop an integrated remote sensing drought monitoring index (IRSDI), based on meteorological data for 2003-2013 from 40 meteorological stations and soil moisture data from 16 observatory stations, as well as MODIS data using a linear trend detection method, and standardized precipitation evapotranspiration index (SPEI). The objective was to investigate drought conditions across the Huai River basin in both space and time. Results indicate that: (1) the proposed IRSDI monitors and describes drought conditions across the Huai River basin reasonably well in both space and time; (2) droughts and high drought frequency are observed during April-May and July-September. The northeastern and eastern parts of Huai River basin are dominated by frequent droughts and intensifying droughts events. These regions are dominated by dry croplands, grasslands and highly-dense population, and are hence more sensitive to drought hazards; (3) intensifying droughts are detected during almost all months except January, August, October and December. Besides, significant intensification of droughts is discerned mainly in eastern and western Huai River basin. The duration and regions dominated by intensifying drought events would be a challenge for water resources management in view of agricultural and other activities in these regions in a changing climate.

 

Published in Journal of Geophysical Research, 2017, DOI 10.1002/2017JD027186.


 
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