摘要
为了更加准确地估算黄土高原的蒸散发,本文基于FAO56的Penman-Monteith数学模型,结合Leuning提出的叶面积指数(LAI)反演ET的理论思想,提出Remote Sensing Leaf Area Index Penman-Monteith模型(RLPM)。使用MODIS中国合成产品NDVI和研究区气象资料数据反演出所需的参数值,以黄土高原为研究区域,最后可计算研究区域内任意时间、任意地点的日ET值。将本模型的ET反演值与普通的P-M模型得到的反演值进行线性分析,得到相关性系数均大于0.8。该研究旨在丰富蒸散发模型计算方法,提高蒸散发计算的准确度。
In order to estimate evapotranspiration in the loess plateau more accurately,this paper proposed the Remote Sensing Leaf Area Index penman-monteith model(RLPM)based on the Penman-Monteith mathematical model proposed by FAO56 and combining with the theoretical idea of LAI inversion ET proposed by Leuning.Using the synthetic product NDVI of MODIS in China and the meteorological data of the research area,the required parameter values were obtained.Taking the loess plateau as the research area,the daily ET value at any time and any place in the research area could be calculated finally.By linear analysis of the ET inversion values of this model and the inversion values obtained by the ordinary P-M model,the correlation coefficients were all greater than 0.8.The aim of this study was to enrich the calculation method of evapotranspiration model and improve the accuracy of evapotranspiration calculation.
作者
刘宁
崔晨风
翟羽婷
LIU Ning;CUI Chen-feng;ZHAI Yu-ting(College of Water Resources and Architectural Engineering, Northwest A&F University,Yangling 712100, Shaanxi Province, China)
出处
《节水灌溉》
北大核心
2020年第5期32-37,共6页
Water Saving Irrigation
基金
国家国际科技合作专项项目“提高旱区作物水分利用效率的关键技术研究与应用”(2014DFG72150)
国家自然科学基金面上项目“变化环境下西北旱区农业水资源系统的响应模拟及敏感性评估”(51279166)。
