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利用主动微波遥感资料(ENVISAT/ASAR)估算的表层土壤湿度和光学遥感资料(EOS/MODIS)的地表温度信息,结合气象站常规观测的气象要素,利用土壤水热耦合及水分蒸发模型对黄土高原典型塬区进行了蒸散发量的估算。将估算的蒸散发量与实际观测对比表明,两者之间绝对误差最大为117W·m-2,最小为0.6W·m-2,平均为24W·m-2。基于微波遥感参数估算蒸散发量的方法为估算区域蒸散发量提供了一种新的思路。
Based on the information of surface soil moisture estimated by ENVISAT / ASAR and surface temperature of optical remote sensing data (EOS / MODIS), and combined with the meteorological elements routinely observed by weather stations, the effects of soil moisture, heat and water evaporation on the Loess Plateau The typical area for the estimation of evapotranspiration. The estimated evapotranspiration and actual observations show that the absolute error between the two is 117W · m-2, the minimum is 0.6W · m-2 and the average is 24W · m-2. The method of estimating evapotranspiration based on microwave remote sensing parameters provides a new idea for estimating the amount of evapotranspiration.