涑水河流域近18年土地利用/覆被变化及驱动力研究

Study on Land Use/Cover Change and Its Driving Forces of Sushui River Watershed During the Last 18 years

本研究以涑水河流域的1990年和2008年两期TM影像为主要数据源,在ENVI和ArcGIS软件支持下,采用土地资源数量变化模型、土地利用转移矩阵和土地利用程度变化模型分析了涑水河流域18年间土地利用时空演变的情况及驱动机制。研究表明:涑水河流域林草地、耕地、建设用地呈现出较快增长的趋势,水域、未利用地呈现出逐渐减少的趋势;土地利用单一动态度变化不大,土地综合利用动态度为4.383。人口、政策以及城镇化经济增长是该流域土地利用/覆盖变化的主要驱动因子。

Land use/cove change(LUCC) situation and its driving forces in Sushui River watershed had been investigated by monitoring an analytical research of phases of Landsat TM data of 1990 and 2008,supported by ENVI and ArcGIS,and by employing the land resource quantity change model,the land utilization transfer matrix and the land utilization degree change model to study the land use tendency and driving forces of LUCC for the period of 1990～2008.The result indicated that the cultivated land,build-up land,grassland and forestland area had presented a rapid growth tendency,while water area and moorland had an opposite tendency.Sole dynamic degree of land use had a little change and the sequences of land use dynamic degree were build-up land>moorland>grassland and forestland>water area>cultivated land.Comprehensive dynamic degree of land use was 15.83,belonging to land-use fast change type.Integrated index of land use change was 58.37 and the land use change rate was 0.23.Land development degree of utilization was strengthened in this area,which was the result of the rapid development of economy and society.Population,policy as well as urbanization economic growth were the main driving factors of the land use/coverage in Sushui River watershed.