| 近30年来西藏那曲湿地变化及驱动力探讨 |
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| 引用本文： | 张继承,姜琦刚,李涛,李远华,王坤,郭津海.近30年来西藏那曲湿地变化及驱动力探讨[J].世界地质,2009,28(3):371-378. |
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| 作者姓名： | 张继承 姜琦刚 李涛 李远华 王坤 郭津海 |
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| 作者单位： | 1. 国家海洋局海洋咨询中心, 北京 100860; 2. 吉林大学地球探测与信息技术学院遥感应用研究所, 长春 130026; 3. 中国人民解放军65015部队, 辽宁 大连 116023 |
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| 基金项目： | 中国地质调查局基金项目"青藏高原生态地质环境遥感调查与监测" |
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| 摘 要： | 以RS/GIS为主要手段, 以基于60年代末航片绘制的那曲县1: 10万地形图、1990年TM遥感数据、2000年ETM遥感数据和1∶25万DEM数据为主要数据源, 结合那曲县温度、降水等资料, 对那曲县湿地分布、面积变迁和驱动力进行分析, 结果表明: 那曲县湿地变迁总体趋势自20世纪70年代以来呈萎缩趋势。空间差异表现为: 那曲县西部小型断陷湖盆谷地区域的湿地面积自70年代以来一直呈现萎缩趋势, 东部、南部高山宽谷地区、河源区湿地自经历70～90年代扩张后, 在90年代面积转为萎缩。气候波动和频繁的人类活动是湿地变迁的驱动力, 湿地的地质、水文等背景因素的不同可能是变迁差异的重要原因。
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| 关 键 词： | 那曲湿地 湿地变迁 青藏高原 驱动力 |
Changes of wetland in Nakchu in the last 30 years and analysis of driving forces |
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| ZHANG Ji-Cheng-,JIANG Qi-Gang-,LI Tao-,LI Yuan-Hua-,WANG Kun-,GUO Jin-Hai-.Changes of wetland in Nakchu in the last 30 years and analysis of driving forces[J].World Geology,2009,28(3):371-378. |
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| Authors: | ZHANG Ji-Cheng- JIANG Qi-Gang- LI Tao- LI Yuan-Hua- WANG Kun- GUO Jin-Hai- |
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| Institution: | 1. National Marine Consulting Center, State Oceanic Adm inistration, Beijing 100860, China; 2. Applied Institute of Remote Sensing, College of Geoexploration and Information Technology, Jilin University, Changchun 130026, China; 3. No.65015 Troop of PLA, Dalian 116023, Liaoning, China |
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| Abstract: | The wetland distribution, area change and driving force have been analyzed by means of RS/GIS, and take 1∶100 000 topographic map s of Nakchu, based on aerial photographs in the late 1960 s, remote sensing images of Landsat TM in 1990, Landsat ETM in 2 000 and the 1∶250 000 DEM data as main data sources, as well as combined with the temperature and precipitation data in Nakchu. The results indicate the wetland change in Nakchu presented degradation trend from 1970 s. The spatial differences show that the wetland acreage in small-sized faulted lake basin valley areas of western Nakchu was degenerated from 1970 s, while increased in high mountain-wide valley and river source areas of eastern and southern Nakchu during 1970～1990, and decreased after 1990 s. Climatic fluctuations and human activities are also the driving forces of wetland change, and the differences of wetland geological and hydrological factorsmaybe an important reason forwetland change. |
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| Keywords: | wetland in Nakchu wetland change Qinghai-Xizang plateau driving force |
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