Temporal Spatial Mutations of Soil Erosion in the Middle and Lower Reaches of the Lancang River Basin and Its Influencing Mechanisms

As a major threat to ecosystem functions and national food security, soil erosion also exerts an influence on the water quality in basins operation maintenance of hydropower plants. Existing discussions about trends focus mainly its variation mutation over time. Few studies have addressed spatial mechanism. In this research, Sen’s slope estimation was coupled with Mann–Kendall model explore spatiotemporal distribution, characteristics mechanisms erosion, conduct case study Middle Lower reaches Lancang River Basin (ML-LRB) China. There are three main conclusions from study: (1) During 2000–2019, annual ML-LRB ranged 0 7.00 × 103 t/(km2·a) multi-year mean 1.53 t/(km2·a), decreasing year by north south, while increasing trend began appear central above region after 2015. (2) The areas decreased were much larger than those increased during there concentrated increase Dali Xishuangbanna. (3) intensity spatially consistent that Normalized Difference Vegetation Index (NDVI). Overall, paper provides new perspective for factors affecting erosion.