近40年来贵阳市“两湖一库”地区土地利用/覆被变化

在对"两湖一库"(红枫湖、百花湖和阿哈水库)地区1973,1993,2001和2010年的4期卫星遥感影像进行解译的基础上,利用RS和GIS技术,建立区域土地利用/覆被类型空间数据库,定量分析了研究区域近40a来土地利用/覆被时空变化特征及其生态环境效应。结果表明:(1)该地区土地利用/覆被类型以旱地、水田和林地为主。(2)与1973年相比,2010年荒草地急剧减少,只占区域面积的1.02%;建设用面积急剧增加,比1973年增加了207.93%;林地面积增加了13.51%;耕地面积(旱地、水田)减少了18.41%;水域面积增加42.06%。(3)耕地主要向林地和建设用地转移,荒草地主要向林地和水域转移,林地则主要向建设用地转移。

Land Use/Cover Changes of "Two Lakes and One Reservoir" Region in Guiyang City Over Last 40 Years

Based on the interpretation of satellite images of the "two lakes and one reservoir" in 1973, 1993, 2001 and 2010, using RS and GIS, the spatial database of regional land use/cover changes(LUCC) was established, and the LUCC characteristics of temporal and spatial variation over past 40 years was quantitatively analyzed; Meanwhile, the LUCC's impact on ecological environment was discussed. The results show that:(1) Dry land, paddy field and woodland are main land use/cover types in "two lakes and one reservoir"(Hongfeng Lake, Baihua Lake and Aha Reseruior) region;(2) Compared with 1973, grassland decreased rapidly, only accounting for 1.02% of the area; construction area increased 207.93%; the forest land area increased by 13.51%; area of cultivated land(dry land, paddy field ) decreased by 18.41%; the water area increased by 42.06%;(3) Cultivated land mainly transferred to the woodland and construction land, grassland transfered mainly to forest and water area, forest land mainly transfered to the construction land.