Land Use Pattern Change and its Topographic Gradient Effect in Mountainous County ——Case study of Jinggangshan city

Authors: Yuzhu Zang*,
Topics: Land Use and Land Cover Change, Land Use, Rural Geography
Keywords: land use change; landscape pattern; topographic gradient effect; poor mountainous areas;Jinggangshan city
Session Type: Poster
Day: 4/5/2019
Start / End Time: 8:00 AM / 9:40 AM
Room: Lincoln 2, Marriott, Exhibition Level
Presentation File: No File Uploaded

Topography is one of the most important natural environment factors that determines land use pattern. Taking Jinggangshan city as the study area, we selected DEM data and remote sensing data during 1995-2015 to explore the relations between topographical factors and land use pattern. Altitude, slope and terrain niche were chosen as indicators to explain how topographical conditions influence land use spatial pattern, land use change and landscape pattern. Results indicated that land use spatial pattern was affected by the topographical factors. Cultivated land, construction land and water areas were concentrated in plains and gentle rolling hills with lower altitude and slight slope, while forest and meadow were mainly distributed in mountains with high altitude and steep slope. Moreover, land use transitions also had close relations with terrain factors which mainly occurred in plains and gentle rolling hills. Decrease of forest and increase of construction land are the major land use changes during 1995-2015. In addition, topographical conditions contribute to the variation of landscape pattern. Patches distributed multitudinously and intensively in plain and gentle rolling hills, which resulted in higher value of landscape diversity index, interspersion juxtaposition index, patch density and land use structure entropy. However,there are scattered and single patches in mountain areas, so the largest patch index and contagion index are usually high. The terrain difference is an important influence factor to land use structure, land use transition and landscape pattern. It should be fully taken into consideration when people determine to change the land use types.

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