Research progress of spatial distribution about geomorphology-vegetation-water erosion in Pisha stone area of Yellow River

The soil-covered Pisha stone area is the core source area of coarse sediment in the Yellow River and has become the focal point of ecological control of the Yellow River basin. It is thus vital to study the spatial distribution of erosion coupling between geomorphology, vegetation and water in the soil-covered Pisha stone area. In addition, the negative correlation between the spatial structure of the vegetation community and the energy dissipation impedance of erosion requires further studies. It is necessary to study the differentiation spatial structure characteristics of topography and geomorphology, the differentiation characteristics of vegetation and community, and the differentiation temporal and spatial characteristics of erosion mechanism in the Pisha sandstone area, especially through the study on the factors of the three as a coupling system. We should also study the spatial and temporal characteristics of soil erosion in different landform units, reveal the coupling mechanism between the spatial-temporal characteristics of water erosion in the slope-gully system and those of natural vegetation, and find the spatial coupling mechanism of the landform-vegetation-water erosion in the Pisha stone area. The study will directly affect the theoretical foundation of a comprehensive model for treating soil erosion in the area.