Precipitation Risk Assessment during SingleCropping Rice Growth Period in Zhejiang Province
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Abstract:
The surpass probability of precipitation of different levels during the singlecropping rice growth period in Zhejiang Province is studied using the risk assessment model based on the principle of information spread by means of the precipitation data during the singlecropping rice growth periods from 58 local meteorological stations from 1971 to 2004. With the risk charts of differentlevel precipitation, the risks of droughts and floods for singlecropping rice and their damage to rice yields are evaluated. The results indicate that the highrisk areas with precipitation lower than 400 mm are located in the coastal island areas, Jiaxing, and the JinhuaQuzhou basin, where rice suffers heavier drought damage. The highrisk areas with precipitation higher than 1000 mm are found in the southeastern coastal areas (including Linhai, Wencheng, Wenling, Ninghai, Taishun, etc), where singlecropping rice suffers greater flood damage (typhoon rainstorm). Compared to the drought disasters, which may be relieved by irrigation, floods have greater contribution to rice yield reduction.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.