利用生育期水分供应系数进行旱涝区划的研究

STUDY ON DRYNESSWETNESS REGIONALIZATION WITH WATER SUPPLY COEFFICIENTS DURING CROP GROWTH

根据不同作物不同发育阶段的需水特性，建立了作物蒸腾耗水模型。利用水分平衡方程，根据降水量及前期土壤水分储存量与作物蒸散耗水（包括蒸腾和土壤蒸发）量的差，确定作物不同生育期水分满足程度的时间变化曲线，用以衡量水分的满足程度。并根据水分供应曲线，用聚类分析法将黑龙江省分为不同类型的干湿区。关键词旱涝区划，蒸腾耗水模型，水分供应系数，生育期。

A transpiration waterconsuming model is proposed in accordance with water satisfaction in differing growth phases of crops and timedependent curve was prepared for showing growthphase water requirement by means of the difference between rainfall plus previous soil water and field water consumption through evapotranspiration based on the water balance equation, whereby the water requirements were investigated. And dry and wet regions were separated by use of cluster analysis based on the water variation for Heilongjiang province.