大清河流域蒸发量变化分析

摘要

蒸发是流域水循环和能量循环的关键环节。蒸发量的变化趋势在水文循环过程中对气候变化有着重要的指示意义。文章对大清河流域40 a的蒸发量资料进行了初步分析，通过对蒸发量的分配与变化趋势的分析，反映出了大清河流域蒸发量变化的特性规律。典型站1968-2007年蒸发量呈现逐渐缓慢减少的趋势。%Evaporation is a key segment of water cycle and energy cycle.The change trend of evaporation process has important implications in the hydrological cycle to climate change.This article conducts a preliminary analysis of 40 years evaporation data in the Daqinghe River basin,reflecting the characteristics of evaporation through the trend analysis of the evaporation in the Daqinghe River basin. Evaporation from 1968 to 2007 of the typical station was in the tendeney for decreasing slowly.