1. The main content of the results and technological innovation
(1) reveals the law of soil erosion under the coupling of “natural-manual”. The new soil erosion modulus of different disturbance types in development and construction was obtained, and the influencing factors affecting the loss of spoil slag were clarified. The simulation of landslide erosion movement process on slope-slope-watershed scale was realized, and the gravity erosion of the basin was clarified. Spatial distribution characteristics.
(2) Discussed the water and sediment regulation mechanism of the “natural-artificial” vegetation distribution structure. The effects of different coverage and spatial distribution of slope-slope grass on rainfall runoff and sediment yield were analyzed. The influence of landscape pattern on watershed erosion was elucidated. The ecological security pattern adjustment strategy based on watershed landscape was proposed.
(3) Explain the regulation mechanism of water and sediment in channel control measures and the spatiotemporal source of sedimentation; propose the calculation method of overall erodibility of the basin; analyze the overall corrosion resistance and erosion under the coupling of natural and artificial watershed in typical watershed Modular evolution.
(4) Proposed the ratio of matrix composite material and water retention slow release fertilizer in development and construction project, and improved the technical system of soil erosion prevention and control of slope, slope and channel erosion chain.
(5) Established the identification method of multi-concentration of water and sediment in the basin, and revealed the characteristics of water-sand transmission and flood superposition process in the basin.
(6) Explain the gravity erosion and its regulation mechanism in the basin, and develop a distributed model of erosion and sediment production suitable for the gully remediation basin, and reveal the coupling and control mechanism of the treatment of erosion and sediment transport.
(7) Proposed an ecological-safety-efficient zoning planning and layout method for the gully remediation project, developed a safe, rapid and economical gully remediation engineering design and construction technical system, and built a demonstration project with complete types and wide radiation.
(8) The development and utilization mode of mud-sand-soil type, green economy type, science and technology demonstration type and eco-tourism type gully were constructed, and the technical regulations for multi-objective balance utilization and safe operation of water and soil resources in regional, river basin and channel dam system were put forward.
2. Results application
(1) The research results have been widely used in the soil erosion control and ecological restoration of the development projects of returning farmland to forest and grassland, hydropower construction and expressway and coal mine construction in Shaanxi Province, which has strongly supported the smooth development of development and construction projects. It has been recognized by the relevant units and has greatly promoted the development of local social economy.
(2) The research has been applied in the planning and construction of 17 river basins in Shaanxi, Inner Mongolia Autonomous Region, Gansu Province and other provinces, providing a reliable ecological barrier for the realization of local social and economic development and sustainable development strategies.
