大型ライシメー夕による裸地蒸発量の観測・評価

Abstract

To know an exact amount of evapotranspiration is important not only for theplanning and management of water resources, but also for the understanding of themechanism of hydrological cycle. Then we especially take up an evaporation frombare soil.A lysimeter was developed for measurement of evaporation in the air-ground in-teraction observing system at Uji ground. In this paper, we make a statistical treat-ment about observation data and analize the correlation between evaporation fromthe lysimeter and other meteorological elements. And finally, we present efficientformulas to estimate the amount of evaporation at several time intervals accordingto the expanded Penman's method.