暴雨灾害对福建水稻产量影响的灾损评估方法研究

来源 :2009农业环境科学峰会 | 被引量 : 0次 | 上传用户:liongliong490
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  利用福建省历年暴雨和水稻产量资料,确定出水稻产量灾损量的表征方法,分析暴雨对水稻单产影响的关键时段和致灾因子,在致灾因子中首次提出效力暴雨量的概念,充分考虑暴雨强度和水稻不同生长发育期抗灾力的不同影响,建立暴雨对早稻和中晚稻单产影响的灾损评估模型,从而形成暴雨灾害对福建水稻产量影响的一套完整灾损评估方法.利用评估模型对2007年福建暴雨发生区域的水稻单产进行灾损预估及检验,结果表明:早稻单产灾损率的预估误差的绝对值在0.08-5.15%,平均误差为2.15%;中晚稻单产灾损率的预估误差的绝对值在0.02-3.77%,平均误差为1.9%,预估精度较高,灾损评估方法可行.
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