A Study on the Rationality of Land Use Change in the Dianchi Basin during the Last 40 Years under the Background of Lake Revolution

(1) Background: Dianchi Lake is the largest freshwater plateau lake in southwest China. Since 1970s, with large-scale reclamation and rapid urbanization, land use/cover of Basin has changed dramatically, directly hindering sustainable development watershed. It urgent to study rationality use change order promote “win-win” eco-environment protection economic social Basin. (2) Methods: The judgment criteria was constructed from ecological values, suitability, laws regulations, 1980 2020 evaluated. (3) Results: rational degree 71.76%, level low rationality. cultivated land, woodland, grassland, water area construction 74.41%, 69.11%, 77.11%, 3.07% 98.26%, respectively. Among irrational changes, 86.59% had land. (4) Conclusions: main problems are massive reduction high-quality degradation unordered expansion In achieve development, it important protect grassland lakes.