摘要
蒸散发是陆面过程中的重要环节,联系着陆面水循环和地表能量平衡。采用MODIS数据,逐月选取2013年12期遥感数据,并分季度求其平均值作为四季代表,结合SEBS模型,对辽西北地区地表蒸发蒸腾量进行了估算,并为了验证遥感反演精度,提取不同土地利用类型的蒸散发量。同时,利用Penman-Monteith公式计算辽西北地区近50年潜在蒸散发值,通过一元线性趋势分析法、小波分析法、IDW反距离加权法和R/S分析法分析其时空分布特征。结果表明:辽西北地区2013年蒸散发量夏季>春季>秋季>冬季;近50年来潜在蒸散发值由高到低依次为夏季、春季、秋季和冬季,且具有明显的区域性。同时,经验证,遥感手段反演蒸散发值误差约为7.5%,表明该方法在研究区应用合理可行。研究结果可为辽西北地区水资源分配和管理提供科学参考。
Terrestrial evapotranspiration is the key connection of a wide array of Earth system processes,which links water cycles and enemy balances over land.This paper selected 12 sensing data from NASA as the representative of four seasons,combined with the SEBS model to reckon the evapotranspiration of land surface and analyzed the ET of different land use types to verify the precision of remote sensing.To analyze the temporal-spatial characteristic,trend analysis,wavelet analysis,IDW and R/S analysis method based on Penman-Monteith wereselected.The results show that the ET in northwest of Liaoning Province decreased in the order:summer>autumn>spring>winter;the evapotranspriration decreased in the order:summer>spring>autumn>winter;the error of evapotranspiration estimating is about 7.5%in meantime,indicating that the method is reasonable to be applied in the study area.The results can provide a scientific reference for water resources allocation and management in northwest of Liaoning Province.
出处
《水土保持研究》
CSCD
北大核心
2017年第6期382-387,共6页
Research of Soil and Water Conservation
基金
中央高校基本科研业务费专项资金(2412016KJ046)
公益性行业(气象)科研专项储备项目(2015001)
国家自然科学基金(41571491)
国家自然科学基金(51279072)
关键词
蒸散发
遥感估算
SEBS模型
辽西北地区
evapotranspiration
estimating by remote sensing
SEBS model
northwest of Liaoning Province
