2000～2009年中亚阿姆河流域土地覆被时空变化分析

发布时间：2018-04-14 11:17

  本文选题：内陆河 + 土地退化　； 参考：《遥感技术与应用》2017年02期

【摘要】：土地覆被变化是反映区域气候变化和人类活动强度的重要指标,监测土地覆被变化是遥感应用的重要领域。阿姆河作为中亚重要的内陆河之一,是维系区域生态环境和经济发展的重要纽带。利用欧空局(ESA)的Global Land Cover 2000(GLC2000)和全球陆地覆被数据GlobCover的2005、2009共3期数据,以Chatly水文站点位置划分流域上下游,分析了整个流域及上游土地覆被时空变化。研究结果表明:2000~2009年阿姆河流域增加的耕地面积主要来自于自然植被和裸地,裸地面积的增加主要来自于自然植被,水体面积减少10%;在流域上游,2000~2009年耕地面积的增加约占整个流域耕地面积增加的50%,且主要发生在塔吉克斯坦和乌兹别克斯坦的山麓和平原地区,2000~2005年自然植被面积增加主要来自于撂荒的耕地和裸地,而2005~2009年自然植被面积减小主要转换为裸地,水体面积则在2000~2009年增加了153%。阿姆河流域的土地覆被时空变化分析有助于解释人类活动对该流域环境系统的影响,期望对流域水资源综合管理有所启示。
[Abstract]:Land cover change is an important index to reflect regional climate change and the intensity of human activities. Monitoring land cover change is an important field of remote sensing applications.As one of the important inland rivers in Central Asia, Amu River is an important link to maintain the regional ecological environment and economic development.Using the data of Global Land Cover 2000 GLC2000 and global land cover data GlobCover 20052009, the upper and lower reaches of the watershed are divided by the location of the Chatly hydrological station, and the temporal and spatial changes of land cover in the whole basin and upper reaches are analyzed.The results show that the increase of cultivated land in the Amu River basin from 2000 to 2009 mainly comes from natural vegetation and bare land, and the increase of bare land area mainly comes from natural vegetation.The increase of cultivated land area in the upper reaches of the basin accounted for about 50 percent of the increase in the area of cultivated land in the whole basin, and mainly occurred in the foothills and plains of Tajikistan and Uzbekistan, and the area of natural vegetation increased from 2000 to 2005.Canada mainly comes from abandoned farmland and bare land,From 2005 to 2009, the area of natural vegetation was reduced to bare land, and the area of water increased by 153in 2000 ~ 2009.The analysis of temporal and spatial changes of land cover in the Amu River basin is helpful to explain the impact of human activities on the environmental system of the basin, and it is expected to be enlightening to the integrated management of water resources in the basin.
【作者单位】： 中国科学院西北生态环境资源研究院甘肃省遥感重点实验室;中国科学院大学;兰州大学资源环境学院西部环境教育部重点实验室;兰州大学丝绸之路经济带研究中心;
【基金】：基金委重大研究计划“黑河流域生态-水文过程集成研究”(91425303)
【分类号】：P237
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本文编号：1749075