摘要
以黄河三角洲为研究区,基于1986年6月5日和2009年6月4日的Landsat TM影像进行土地利用/覆被分类及变化特征研究,同时,基于SEBAL模型估算区域蒸发蒸腾量,进而分析湿地蒸发蒸腾的数量特征、空间格局特征及其对土地利用/覆被变化的响应特征。结果表明:23年间,58.74%的区域土地利用/覆盖类型发生了变化,未利用地大幅减少,水体和建设用地大幅增加,显著的土地垦殖与耕地荒废则同时存在;蒸发蒸腾强度大小按土地利用/覆被类型排序依次为水体>滩涂>苇地>林草地>耕地>建设用地>未利用地,研究区未利用土地变为水体和耕地是导致区域蒸发蒸腾整体提高的主导原因,而耕地流失则是导致区域蒸发蒸腾整体下降的主要原因,但23年间实际变化以前一种情形占优势,因而区域蒸发蒸腾总体呈现为增加趋势。研究结果对区域土地利用规划和水资源管理有重要的理论和实践指导意义。
Based on the Landsat TM images on June 5,1986 and June 4,2009,the paper carried out the research for the land use/cover change in the Yellow River Delta.The regional evapotranspiration（ET） was estimated based on the Surface Energy Balance Algorithm（SEBAL） model and analyzed the quantitative feature and spatial patterns of wetland evapotranspiration and its response to land use/cover change（LUCC）.The results showed that the land use/cover types in 58.74% of the total areas had been changed during 23 years.Unused land reduced dramatically while construction land and water increased significantly.Land reclamation and abandon existed at the same time.The order of ET intensity by land use/cover were waterbeachreedwoodland and grasslandfarmlandconstruction land unused land.Unused land transferred into water and farmland led to increase ET,while the loss of farmland caused the decrease of ET.The former change dominated in the actual change process,and therefore the regional ET showed an overall increasing trend during the 23 years.The results of the study have important theoretical and practical significance to regional land use plan and water resources management.
出处
《水资源与水工程学报》
2011年第2期25-30,共6页
Journal of Water Resources and Water Engineering
基金
河海大学水文水资源与水利工程科学国家重点实验室开放基金资助项目(2007490211)
中国科学院知识创新工程重要方向项目(kzcx2-yw-224)
