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前汛期年景的划分对综合评价我省历年前汛期内降水的多寡、强弱和对早稻生产的影响等具有一定的指标意义.本文试图用年景指数来表征前汛期内各地的降水状况及其同早稻生产之间的关系.前汛期降水年景指数按其用途分为与防汛有关的洪涝年景指数及与早稻生长后期密切相关的早稻年景指数.本文所用的资料是1959-1980年52个气象站点的降水和日照.(一)洪涝年景指数某地某月洪涝灾害严重与否,主要视某地某月的总雨量和该月内降水的集中程度而定.前者用月雨量距平百分率??表示,后者
The division of the previous flood season has a certain index significance to the comprehensive evaluation of the amount of rainfall, the strength and the impact on the production of early rice in the previous flood season in our province.This paper tries to use the annual landscape index to characterize the precipitation situation around the first flood season, Its relationship with the production of early rice.Previous flood season precipitation index according to its use is divided into flood control related flood season index and early rice growth is closely related to the early rice annual landscape index.The information used in this article is 1959-1980 52 meteorological sites of precipitation and sunshine. (A) Flood Year Index A serious floods and lakes in a certain place or not, mainly depending on a month’s total rainfall and the concentration of precipitation within the month may be the former with monthly rainfall The anomaly percentage, said the latter