用卫星遥感热红外数据估算大面积蒸散量

Estimation of Large Area Evapotranspiration by Thermal Infrared Satellite Data

从能量平衡方程出发，将试验场实测地表热红外温度及各项气象要素，用冠、气温度差方法，求得局部地区的蒸散量；进而与卫星热红外温度数据相配合，估算大面积作物的蒸散发和蒸散量分布。经验证，该方法的研究结果与实测值有较好的相似性．

This is a new way estimating large area evapotranspiration by thermal infrared satellite remote sensing data. On the basis of energe balance equation, local evapotranspiration was calculated by the difference of plant canopy and air temperature that was presented by field measuring ground surface thermal infrared tempreture and a varity of meteorological factors. Furthermore, large area evapotranspiration and distribution were estimated by thermal infrered satellite data. Study results of the way are more similar to value of field measurement, which was verified. The way will be inproved in order that it will be real applicated.