关键词: 土地利用类型, 景观格局, 喀斯特, 水源地, 大春河小流域

Abstract: [Objective] The aim of the study was to investigate the formation and changes of land use types in Dachunhe basin, which may be important to guide the optimization and protection of regional reservoir-water supply area. [Method] The landsat TM remote sensing image of Dachunhe basin in 2007 and 2015 were analyzed using GIS and RS technology. Additionally, landscape pattern index and quantitative analysis composition, pattern and transformation characteristics of landscape elements in the study area were calculated by Fragstats 4.2. [Results] ① Basin area in Dachunhe reservoir-water supply area was 17.44 km². Main land use types were forest land(27.85%, 36.68%), cultivated land(29.05%, 26.59%) and grassland(28.39%, 24.71%) in 2007 and 2015;② From 2007 to 2015, the total conversion area of land use type was 6.18 km² in Dachunhe basin and the largest change of land use type was forest land; ③ Compared with 2007, the forest land patch density, boundary and shape index reduced but aggregation index increased in 2015 in the study area; ④ The artificial surface(load and construction land) area was increased significantly in 2015 compared to 2007. [Conclusion] The landscape pattern of Dachunhe reservoir-water supply area changed significantly, mainly exhibiting in forest land and artificial surface.

Key words: land use type, landscape pattern, karst, reservoir-water supply area, Dachunhe basin