基于遥感的蒸散发及地表温度对LUCC响应的研究

探讨土地利用/覆盖类型变化(LUCC)对地表温度(LST)和计算蒸散发(ET)的影响，进而了解LUCC对水资源消耗的影响。利用Landsat TM/ETM+遥感数据，解译获取山东省垦利县1987年和2000年的LUCC信息，并利用单窗算法和SEBAL模型分别反演LST，ET。研究发现：由于经济的快速发展，导致1987到2000年13年间山东省垦利县的土地利用/覆盖变化极为显著，变化面积达到总面积的36.12%；土地利用/覆盖的特点基本控制了研究区域的LST和ET的区域分布特点，滨海滩涂、沼泽地、水体的LST值低，而ET值高；建设用地和盐碱地的LST值高，ET值低。不同土地利用/覆盖类型下的各LST和ET基本都表现为单峰型变化。1987年和2000年LST的频率分布特征大体一致，但2000年的各地类LST的分布范围比1987年的LST分布范围变宽。ET的分布变化没有呈现出这个特征，2000年各类型的日ET量都大于1987年的日ET量，两个时期都表现为水体的ET最大，农田次之，建设用地的ET最小。且不同土地利用/覆盖类型下ET和LST之间都存在明显的反相关关系。

Retrieval evapotranspiration and land surface temperature in response to land use/cover change based on remote sensing data

A major motivation of this research is to investigate the variety of land surface temperature(LST) and evapotranspiration(ET) in response to land use/cover change(LUCC), and water resource consumption was further discussed. First, Landsat TM/ETM+ data were carried out for LUCC detection for Kenli county of Shandong Province, and its impact on land surface temperature(LST) and evapotranspiration(ET) in the region was assessed. Herein LST and ET were retrieved by Qin mono-window algorithm and SEBAL model, respectively. The results revealed that the land use/cover change was remarkable during 13 years from 1987 to 2000 in the Kenli county due to accelerated economic growth. The change area achieves 36.12% of the total area. The land use/cover characteristics mainly controlled the spatial distribution of the LST and ET, with the low LST and high ET in beach, bottomland, swamp and water areas, in contrast to high LST and low ET in constructed land and salted land. The distributions of LST and ET were all a single-apex model over different land uses/covers. The frequency distribution characteristic of LST in 2000 was roughly consistent with those in 1987, but the change ranges of LST over different land use/cover in 2000 were large than those in 1987. ET has not presented the same change characteristic, but the daily ET values in 2000 over different land use/cover were larger than those in 1987. Meanwhile, the results demonstrate that ET possessed evidently negative correlation with the LST for all land cover types.