钱塘江流域蒸散发遥感估算

Evapotranspiration Remote Sensing Estimation of Qiantang River

利用MODIS数据产品,结合气象站点的观测资料,通过基于地表能量平衡的SEBAL模型估算钱塘江流域2011年不同月份的地表蒸散发,并利用实测蒸发数据对模型估算结果进行验证,结果表明SEBAL模型在区域有一定适用性。分析钱塘江流域蒸散发时空变化特征,结果表明:蒸散发具有明显的时空差异性,空间上钱塘江和新安江水库蒸发量最大,从土地利用类型来看水体和林地蒸散发量较高,时间上夏季蒸散发量明显高于其他季节。

Using MODIS data product, combined with observational data of meteorological stations, surface evapotranspiration of Qiantang river basin in per month of the year 2011 was estimated by SEBAL surface energy balance model. The measured evaporation data was used to validate the model estimates. The results proved that SEBAL model has some applicability in the region. Analysis on the evapotranspiration spatial - temporal variation of Qiantang fiver basin showed that evapotranspiration has obvious spatial and temporal differences. Qiantang river and Xin＇ an River reservoir evaporation is the largest on space; water and woodland evapatranspiration quantity is higher from the perspective of land use type; the summer evapotranspiration amount is significantly higher than that of other seasons.