不同植被条件下实际蒸散的变化特征及其影响因子——以淮河流域为例

发布时间：2018-05-17 14:34

本文选题：遥感-过程耦合模型 + 实际蒸散　；参考：《应用生态学报》2016年06期

【摘要】：基于遥感-过程耦合模型开展淮河流域2001—2012年实际蒸散(ET)的模拟研究,并对其时空变化特征、不同覆被类型下的区域实际蒸散特征及其主要影响因子进行定量分析.结果表明:研究期间,研究区年均ET在空间上呈现由东南向西北逐渐递减的趋势;时间上呈现逐年增加趋势,月际波动为双峰变化曲线.不同植被类型下ET的差异性表现为:农田对研究区域实际蒸散总量的贡献最大;混交林的年均单位面积实际蒸散量最大,裸地的年均单位面积实际蒸散量最小;除裸地以外,其他土地覆被类型年均实际蒸散都呈增长趋势,其中常绿阔叶林实际蒸散增加趋势最明显.平均温度等热力学因子是影响淮河流域实际蒸散的主导因子,其次是辐射因子和水分因子.
[Abstract]:Based on the coupled model of remote sensing and process, the simulation of actual evapotranspiration et from 2001 to 2012 in Huaihe River Basin was carried out, and the spatial and temporal variation characteristics, the regional actual evapotranspiration characteristics under different cover types and their main influencing factors were analyzed quantitatively. The results show that during the study period, the average annual et decreased from southeast to northwest in space, and increased year by year in time, and the intermonthly fluctuation was a bimodal curve. The differences of et under different vegetation types are as follows: the contribution of farmland to the actual total evapotranspiration of the study area is the greatest; the annual actual evapotranspiration per unit area of mixed forest is the largest, and the annual actual evapotranspiration of bare land is the smallest; except the bare land, The annual actual evapotranspiration of other land cover types showed an increasing trend, among which the actual evapotranspiration of evergreen broad-leaved forest was the most obvious. The thermodynamic factors such as mean temperature are the dominant factors affecting the actual evapotranspiration of Huaihe River Basin, followed by radiation factors and water factors.
【作者单位】：江苏省农业气象重点实验室;南京信息工程大学应用气象学院;
【基金】：国家自然科学基金项目(41575110) 国家自然科学基金委员会-广东联合基金(二期)超级计算科学应用研究专项(nsfc2015_233)资助中国气象局/河南省农业气象保障与应用技术重点开放实验室开放研究基金项目(AMF201305)~~
【分类号】：S161.4

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