XU Li-ping,GUO Peng,LIU Lin,et al.Analysis of the Spatiotemporal Features of Land Use and Land Degradation in the Northern Piedmont Area of the Tianshan Mountain[J].Research of Soil and Water Conservation,2014,21(05):316-321.
天山北麓土地利用与土地退化的时空特征探析
- Title:
- Analysis of the Spatiotemporal Features of Land Use and Land Degradation in the Northern Piedmont Area of the Tianshan Mountain
- 分类号:
- X171
- 摘要:
- 研究天山北麓土地利用/覆被变化过程中的土地退化现象，有利于监测新垦绿洲的环境演变过程。采用1990年、2000年2010年3期遥感影像为基础数据，选取土地利用变化幅度、动态度、土地利用强度指数和LUCC动态变化趋势指数4个指标，并结合转移矩阵，对该地区20 a来的土地利用/覆被变化时空特征及土地退化现象进行综合分析。1990—2010年，研究区耕地和城乡居民工矿用地所占比例持续上升，分别增加了91.05%和60.19%。草地和冰川/永久积雪面积则大幅减少，分别下降了15.45%和28.97%。通过转移矩阵发现，草地和永久冰川退化成荒漠的趋势明显。各土地利用类型中以草地的土地利用变化强度指数最高，达－0.5056%，耕地次之，为0.4091%。研究区土地利用类型间主要转移方向为：草地和冰川/永久积雪转化为荒漠，荒漠和草地转化为耕地，荒漠与草地间相互转化，盐碱地面积得到控制，但向荒漠转化的趋势凸显，永久冰川的消融明显加剧，草地持续退化，研究区生态环境恶化趋势明显。
- Abstract:
- In order to study the Tianshan Mountains land use change and land degradation status, land use/cover change and land degradation within 20 years in the region were analyzed based on remote sensing data of 1990, 2000 and 2010, and by selecting the range of land use change, land use dynamic degree and intensity index, and combining with the transfer matrix. The area of farmland and urban and rural residents and industrial land continued to increase from 1990 to 2010, and increased by 91.05% and 60.19%, respectively. Meadows and glaciers or permanent snow area significantly reduced, decreased by 15.45% and 28.97%. Based on the transfer matrix, degeneration of grassland and permanent glaciers into desert was obvious. Various land-use types, land-use change in grassland intensity index was up to -0.5056%, followed by arable land, which is 0.4091%. The main land use types in the transfer direction in the study area was grassland and glaciers/permanent snow into the desert, desert and grassland into arable land, desert and grassland mutual transformation, area was under control, but the trend of the conversion of the saline land to desert was obvious, and losses of permanent glaciers was rapid.
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备注/Memo
收稿日期:2013-11-06;改回日期:2013-11-30。
基金项目:国家自然科学基金“天山北麓新垦绿洲土地覆被变化与局地气候互动效应研究”（41001387）
作者简介:徐丽萍(1978-),女,新疆库尔勒人,副教授,研究方向:土地覆被变化与景观生态。E-mail:xlpalw@sina.com