洛河流域蒸散发遥感反演及其与各参数的相关性分析

利用ETM数据和地表热量平衡模型估算洛河流域的蒸散发量,并结合地面实测资料进行检验,然后综合分析蒸散发量与土地利用/覆被、地表参数、地形参数的关系。研究发现,不同下垫面的蒸散发能力有一定的差别,其中水体和林地的日蒸散发量最大;蒸散发量与NDVI、植被覆盖度以及高程等参数呈线性相关,而与地表温度呈指数相关,与叶面积指数呈对数相关。

Estimating Evaporation in Luo River Basin Using Remote Sensing and Analyzing Correlation between Evaporation and Various Parameters

Evaporation is an important heft of heat balance and water balance,and it has very important significance for great area evaporation estimation using remote sensing technology.So in this paper,ETM data and surface energy balance equation are used to estimate the evaporation of Luo River and the result is verified using surface data.And then,the correlation between evaporation and LUCC,surface parameters,terrain parameters is analyzed.Research shows that different kinds of land have different evaporation,the most is water and forest;the correlation between evaporation and NDVI is linear,and so are the degree of vegetation cover and elevation;however,the correlation between evaporation and surface temperature is exponential,and the LAI is logarithmic.A new method for researching evaporation with RS is put forward through researching the evaporation of Luo River Basin and the correlation between evaporation and all parameters,it provide the management of water resource and policy decision with a new technology.