期刊
NATURAL HAZARDS
卷 66, 期 2, 页码 155-166出版社
SPRINGER
DOI: 10.1007/s11069-012-0398-8
关键词
Agricultural drought; Risk assessment; Spatial characters
资金
- China Global Change Study National Basic Research Program [2012CB95570001, 2011CB952001]
- Fundamental Research Funds for the Central Universities
Based on the natural disaster analysis theory, the spatial characteristics of agricultural drought risk in China were investigated at 10 x 10 km grid scale. It shows that agricultural drought risk in China has a clear southeast-northwest spatial pattern. High and very high risk mainly occur in the eastern part of Northeast Plain, the central of Inner Mongolian Plateau, the Loess Plateau, north Xinjiang, the north and south of Yangtze Plain, and Yunnan-Guizhou Plateau. Statistics also show that 19.5 % of the main crop planting area is exposed to low risk, 35.1 % of the area to moderate risk, 39.8 % of the area to high risk, and 5.6 % of the area to very high risk. Further investigation shows that 23 % of total wheat growing areas is located in high and very high risk class; corn and rice are 16 % and 14 % respectively. Comprehensive analysis shows that severely affected areas by drought in the history are mainly located in the high and very high risk areas.
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