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当前位置: 首页 > 文章 > 土地利用/覆被变化对区域蒸散发影响的遥感分析——以吉林省乾安县为例 干旱区研究 2009,26 (5) 124-133
Position: Home > Articles > RS-based Analysis on the Effects of Land Use/cover Change on Regional Evapotranspiration——A Case Study in Qian'an County,Jilin Province Arid Zone Research 2009,26 (5) 124-133

土地利用/覆被变化对区域蒸散发影响的遥感分析——以吉林省乾安县为例

作  者：
金翠;张柏;宋开山;王宗明;杨桄
单  位：
中国科学院东北地理与农业生态研究所;空军航空大学特种专业系;中国科学院研究生院
关键词：
土地利用/覆被变化;地表蒸散发;水循环变化;乾安县;吉林省
摘  要：
以吉林省西部乾安县为例,基于Landsat TM和ETM+影像,分析该区1989年和2001年2期土地利用/覆被变化对区域蒸散发的影响。结果表明:从1989-2001年,乾安县土地利用/变化显著。草地→耕地、草地与不同程度盐碱地、不同程度盐碱地内部的转换为主要土地利用变化类型。12年来,不同土地利用类型的平均日蒸散量格局基本一致,表现为:水体>湿地/耕地>林地>草地/轻度盐碱地>居民用地>中度盐碱地>重度盐碱地。其中,59.6%的地表蒸散强度变化区的土地利用/覆被发生变化。草地→耕地、草地→不同程度盐碱地、不同程度盐碱地→草地的蒸散强度变化以基本不变、减少、增加为主;由轻度盐碱地向重度盐碱地逐渐转变时,蒸散强度降低,反之增加。由于草地的植被覆盖度减少,其蒸散强度降低,而林地、居民用地、轻度盐碱地的植被覆盖度增加,蒸散强度以增加为主。
译  名：
RS-based Analysis on the Effects of Land Use/cover Change on Regional Evapotranspiration——A Case Study in Qian'an County,Jilin Province
作  者：
JIN Cui1,2, ZHANG Bai1, SONG Kai-shan1, WANG Zong-ming1,2, YANG Guang1,3(1.Northeast Institute of Geography and Agricultural Ecology,Chinese Academy of Sciences,Changchun 130012,China;2.Graduate University,Chinese Academy of Sciences,Beijing 100049,China;3.Special Profession Department,Aviation University of Air Force,Changchun 130022,China)
关键词：
LUCC;evapotranspiration;Jilin Province;Qian'an County.
摘  要：
Evapotranspiration(ET) is an important process of water cycle.As one of the important causes of global change,land use/cover change(LUCC) affects regional water cycle by changing ET intensity.In this paper,a case study about the effects of LUCC on the regional ET intensity change in Qian'an County,west Jilin Province in 1989 and 2001 is carried out based on Landsat TM and ETM+ images.The results show that the LUCC was obvious in the county during the period from 1989 to 2001,and the land use change types were mainly the grassland → farmland,grassland → saline or alkaline land,and varying-degree saline or alkaline land.In recent 12 years,the daily evapotranspiration pattern of different land use/cover types was basically the same: waters > wetland/farmland > woodland >grassland/slightly saline or alkaline land > residential areas > moderately saline or alkaline land > seriously saline or alkaline land.From 1989 to 2001,LUCC occurred in the 59.6% regions where the ET intensity was changed.The change of ET intensity of grassland → farmland,grassland → varying-degree saline or alkaline land,and varying-degree saline or alkaline land → grassland was dominated separately by basic maintenance,reduction and enlargement.The ET intensity was decreased in the regions where the slightly saline or alkaline land was shifted to the seriously saline or alkaline land,in contrast,ET intensity was increased.The ET intensity was decreased due to the decrease of vegetation coverage,it,however,was increased over the woodland,residential areas and slightly saline or alkaline land because of the increase of vegetation coverage.

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