%0 Journal Article
%T Spatial Distribution and Seasonal Variation of Evapotranspiration in Yiluo River Basin Based on MODIS Data<br>基于MODIS数据的伊洛河流域地表蒸散空间和年内变化特征
%A WANG Wantong
%A QIAN Lexiang
%A <br>王万同
%A 钱乐祥
%J 资源科学
%D 2012
%I 
%X The Moderate Resolution Imaging Spectroradiometer (MODIS) data has good time resolution and is the ideal data source for simulating monitored region-scale changes in surface energy and water resources at present. SEBS (Surface Energy Balance System) model has been widely applied for its solid theoretical foundation, low limits for regional application and more reasonable and accurate inversion results. However, because the impact of terrain is not taken into consideration by SEBS model, errors occur in inversion results of mountain area with complex terrain. The research region, Yiluo river basin, has complex surface land cover types, so to make SEBS model more applicative this research has made some improvements to SEBS model based on the DEM data. After that, based on these foundations, this paper has estimated the surface evapotranspiration in Yiluo basin and analyzed the spatial distribution and seasonal variation of surface evapotranspiration with MODIS data of four-season typical days (8d) of Yiluo River Basin in 2002 and 2008 and the improved SEBS model. The results show that: 1) The inversion results of improved SEBS model are more close to the surface measure data than the non-improved model, indicating that the improved SEBS model is more accurate. Evapotranspiration increases in large scale and smoothly at an elevation less than 1000m and in small scale above 1000m. Surface evapotranspiration is evidently influenced by slope and exposure, max evapotranspiration value on southern slope; 2) The spatial distribution of surface evapotranspiration in the study area has significantly uneven regional differences. Changes in the evapotranspiration during the year show a single peak trend and significant seasonal variations, but downstream plain areas affected by the water conditions are quite different; 3) The improved SEBS model has certain application in Yiluo basin and can achieve spatio-temporal pattern of macroscopic surface energy and water resources distribution rapidly and visually, so it is of realistic significance for further understanding the production and survival condition, and improving eco-environment and the development and utilization of water resources in the study area.
%K MODIS
%K SEBS model
%K Land surface evapotranspiration
%K Spatial distributions
%K Seasonal variation
%K Yiluo river basin<br>MODIS
%K SEBS模型
%K 地表蒸散
%K 空间分布
%K 年内变化
%K 伊洛河流域
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=A77A33C0E8506BAB47E5D4ED54905D4F&yid=99E9153A83D4CB11&vid=339D79302DF62549&iid=5D311CA918CA9A03&sid=145178081E5EA3CE&eid=F7B1A3F8BE432B4F&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=19