传统农区土地利用与覆被变化(LUCC)及其生态环境效应  

Land Use and Land Cover Change(LUCC)and Its Environmental Effects of Traditional Farm Area

作　　者：李承桧[1] 信桂新[1] 杨朝现[1] 程相友 

机构地区：[1]西南大学资源环境学院,重庆400716

出　　处：《西南大学学报（自然科学版）》2016年第5期139-145,共7页Journal of Southwest University(Natural Science Edition)

基　　金：国家科技支撑计划(2013BAJ11B02)

摘　　要：以荣昌县2005年和2012年两期土地利用数据库为数据源,通过地类转换获取县域土地利用与覆被变化信息,并利用区域生态环境质量指数和区域土地利用与覆被类型转换生态贡献率模型,对产生的生态环境效应进行定量分析和评价.研究结果表明:1 2005-2012年间,在退耕还林、工业化、城镇化以及产业结构调整多重因素驱动下,研究区以往较为稳定的土地利用与覆被类型转换频繁,突出表现在水田、旱地、林地、园地及建设用地间的转换;2 2005-2012年,研究区生态环境质量指数从0.358 2上升至0.382 2,总体呈现好转趋势,其中旱地向林地、建设用地向林地、水田向林地转换的贡献率最为突出;3仍然存在对生态环境不利的负效应转换,尤其应注意林地向旱地、林地向水田、林地向建设用地的逆向转换.研究认为,实施"人退林进",加强林地抚育,严格耕地保护,控制建设用地空间蔓延,强化集约利用,是今后改善和提升传统农区生态环境质量的重要策略.Using the land use database of Rongchang County in 2005 and 2012, it was gotten the land use and land cover change information through the land type conversion, and the quantitative analysis and eval- uation was made by using the region ecological environmental quality indices and the ecological contribu- tion rate model of LUCC type conversion. The results show that：l） From 2005 to 2012, each land use and land cover type converted frequently under the influences of reforestation, industrialization, urbanization and industrial restructuring. The most prominent conversion is the conversion between paddy fields, dry land, forest land, garden land and construction land. 2） The regional coo-environmental quality index in- creased from 0. 358 2 in 2005 to 0. 382 2 in 2012.The overall quality of regional coo-environment has main- tained relatively stable with a rising trend while the conversion of the dry land to the forest land, the con- struction land to the forest land, the paddy field to the woodland are of the most outstanding contribution rate. 3） However, there are also negative effect conversions that will harm the ecological environment, es- pecially the reverse conversion of the forest land to the dry land, the forest land to the paddy field and the forest land to the construction land. Studies suggest that implementation of ＂people yielding to the forest strategy＂ ,strengthening the protection of farmland, tending forest, controlling the spread of construction land space and Strengthening its intensive use are important strategies for the future to improve and en- hance the ecological quality of the traditional agricultural areas.

关 键 词：传统农区 土地利用与覆被变化 生态环境效应 荣昌县 

分 类 号：F301.2[经济管理—产业经济]