山丘区小流域水面蒸发特性实例分析

分析流域蒸散发对水文预报和区域水资源量评价都具有重要意义。限于研究条件,当前主要以研究流域水面蒸发为主,通过水面蒸发与陆面蒸发和流域总蒸发建立关系来间接推算流域整体蒸散发能力。文章以伊春市带岭区永翠河流域为例,对高海拔小流域水面蒸发的规律特征进行实例分析。具体分析了流域代表站水面蒸发量的年际、年内变化规律。利用相关要素对比法进行了资料合理性检查。流域不同口径蒸发资料的换算进行了分析,得出了20cm口径与E-601型蒸发器观测资料的换算关系,可为当地分析天然水体蒸发量和流域总蒸发提供了参考借鉴。

The analysis of watershed evapotranspiration is of great significance for hydrological forecasting and regional water resources assessment.Limited to the research conditions,the present study mainly focuses on water surface evaporation,and indirectly calculates the overall evapotranspiration capacity of the basin by establishing the relationship between water surface evaporation and land surface evaporation,as well as the total evaporation of the basin.Taking Yongcui River Basin in Dailing District of Yichun City as an example,the regular characteristics of water surface evaporation in a small watershed at high altitude are analyzed.The interannual and annual variations of water surface evaporation at watershed representative stations are analyzed in detail.The rationality of the data was checked by using the method of correlation factors comparison.The conversion of evaporation data of different calibers in the basin is analyzed,and the conversion relationship between 20cm caliber and the observed data of E-601 evaporator is obtained,which can be used as a reference for local analysis of evaporation of natural water body and total evaporation of river basin.