大尺度蒸发模型研究

选用淮河流域及其周边的１０个气象站的３５年气象资料和２９个蒸发站的３５个月蒸发资料作分析，同时对Ｄａｌｔｏｎ公式、Ｐｅｎｍａｎ公式作了简化，进而提出了具有较为明确的物理基础的淮河流域分区蒸发模型，该模型可用于大尺度水文模型中的蒸散发能力估算。

Study on Large Scale Evaporation Modeling

In many conventional hydrological models,potential evaporation is estimated by pan evaporation. However, this method is not suitable for large scale modeling. So a study is made in depth to simulate potential evaporation. A 35 years series of monthly data of ten weather stations and twenty nine evaporation stations in and nearby the Huaihe basin are selected for analysis, which shows a regional distribution regularity and correlation between monthly evaporation and seven meteorological factors significantly. Based on the recommendation and comparison of several models, a simplified method to estimate potential evaporation is proposed and the method is suggested to be applied to the Huaihe basin modeling in HUBEX.