The Research on the Soil Moisture Movement Model of Karst Area in Guizhou Province

摘要

Soil degradation has become one of the most serious environmental problems of the world. Karst is a kind fragile environment. The typical Karst areas in Gui Zhou Province, whose basic feather is dualistic structure, have the characteristics of barren soil, serious soil degradation and the surface water leakage. The soil degradation is the major drive factor to the ecology environment weakness., and also become the limitative factor of the native sustainable development of the Karst areas in Gui Zhou Province Many research results on the problem have been obtained .From the research result, the conversion flux of soil moisture between soil and vegetation, soil and native rock determines the vitality of the soil ecosystem in Karst areas, and it is also the key dynamic factor to the soil degradation .So the researches on the modulate of the value changes of the water conversion flux between these interfaces from the facial scale are important to reveal the major mechanism of the soil degradation and the ecology environment corruption in the Karst area from the quantitative angle. Many different models about soil moisture have been established to different areas. The paper introduces a soil moisture model and rectifies it by many monitoring data and meteorological data to adapt to the soil moisture travel in Karst areas. The paper also inversions each factor (for example, the vegetation index, the surface temperature, the albedo and so on) that the model needs using Remote Sensing techniques, and applies the model to the facial scale of Gui Zhou Province .In the facial scale, the paper modulates the soil moisture conversion of motion of Gui Zhou Province and reveals the soil moisture variation quantitatively to explore the soil degradation mechanism of Karst areas further.