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蒸散发在很大程度上影响湿地的水热平衡,宏观掌握湿地区域的蒸散发量对于进一步研究湿地生态系统水文———大气———土壤、植被界面能量转化等过程变得尤为重要。本文在遥感技术基础上,基于地表平衡原理的SEBAL模型,对北京野鸭湖湿地区域蒸散发情况进行模型构建,利用1998年和2004年Landsat TM/ETM卫星数据获取相关地面特征参数及该地区的日蒸散发量,并结合水资源和植被盖度分析研究野鸭湖湿地区域日蒸散发量的动态变化情况。
Evapotranspiration largely affects the water-heat balance of wetlands. Macro-control of the amount of evapotranspiration in the wetlands becomes more important for further study on the processes of hydrology-atmosphere-soil and vegetation interface energy conversion in wetland ecosystems. Based on the remote sensing technology, the SEBAL model based on the principle of surface balance was used to construct the model of evapotranspiration in Yeyahu wetland area of Beijing. Based on Landsat TM / ETM satellite data of 1998 and 2004, Evapotranspiration, and combined with the analysis of water resources and vegetation cover, the dynamic changes of daily evapotranspiration in Yeyahu wetland were studied.