Method for Estimating Impact of Spring LowTemperature and ContinuousRain Disasters on Crop Yields
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Abstract:
A quantitative assessment is made of the economic loss of main crops, including rice, wheat, rape and tea, resulted from the spring lowtemperature and continuousrain disasters in Xinyang, Henan Province, according to the standard definition of the spring lowtemperature and continuousrain disaster, by means of the related meteorological data from 1971 to 2007. The spring lowtemperature and continuousrain disasters are divided into three levels, based on the durations and harmfulness of disaster inducing factors, such as low temperature in March, “l(fā)ow temperature+continuous rain+low temperaturecontinuousrain” in April, and continuousrain in May. The expected crop yields and the disaster loss rates are calculated with the separation method based on Lagrange interpolation theory. The results show that the spring lowtemperature and continuousrain disasters have different impacts during the different periods in spring on rice, wheat, rape, and tea, most harmful in April and May. It is of great significance to carry out the damage assessment of spring lowtemperature and continuousrain disasters for the disaster prevention/mitigation and decisionmaking of governments at all levels.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.