Quantitative Study of the Geomorphic Evolution of Shilin County, Yunnan Province, China, Based on Classic Theory and Method
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Geographical cycle, hypsometric (area-altitude) analysis, sequence of karstic evolution and DEM analysis supported by geographical information system are used to quantify the geomorphic evolution of Shilin county territory of China Yunnan for an integral protection of stone forest reserve. The area-altitude curves and integrals of Shilin county territory, elevation zones and their inner depressions demonstrate that the Shilin county territory is a characteristic of a rejuvenating geomorphic structure at a late period of mature stage. The evolutionary dynamics represent an interplay of the faulted-blocks motion and Bajiang erosion base level control which made the original monadnock karst planation plateau into four levels of elevation terrains with different topographic features. The curve and the integral of the subarea and depressions in elevations ranging between 1700 and 1900 m demonstrates that the geomophic structure is a complex of a vertical layer structure of the stone forest and the horizontal step structure because of mixing karst vertical reduction and horizontal erosion.
KeywordsGeomorphic evolution Hypsometric analysis Geographical information system Stone forest Water and soil resource Karst reserve
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