Soil And Water Conservation Evaluation Of South-to-North Water Diversion To Miyun Reservoir Project

The phenomenon of soil erosion is very serious in China and soil erosion caused by production and construction projects is amazing.It is important to study how to reduce man-made soil erosion through soil and water conservation.The paper based on the South-to-North Water Diversion-to-Miyun Reservoir Project.The author studied the project through the main project data,soil and water conservation programs,soil and water conservation monitoring program and followed the monitoring staff to conduct on-site investigation.Then the author analyzed and appraised the soil and water loss situation of the project,the implementation of soil and water conservation measures and soil and water conservation benefits of the project.and use the expert scoring method to establish the evaluation model to assess the suitability of the project’s soil and water conservation measures.Then the author solved the problem encountered by consulting the literature and the experts after the project was completed in 2016.It is hoped that through this study,we will summarize the general experience of soil and water conservation for long distance pipeline water conveyance project,providing some reference for the future similar projects about the soil and water conservation work.Conclusions are as follows:(1)The six indexes of soil and water loss in the project can meet the first grade standard of soil erosion except soil erosion control ratio.Since the project just entered the natural recovery period in 2017,plant measures have not yet fully played the role of soil and water conservation.soil erosion control ratio will meet the level of prevention and control standards after the natural recovery period.(2)The indicators meet the Beijing water conservancy project construction target requirements except the temporary land occupation and permanent occupancy ratio.The project is a long distance pipeline project.It need to take up a large number of temporary land in the pipeline construction process.The vegetation is get restored after the project completed.So the temporary occupation and permanent coverage cannot meet the Beijing local control objectives and requirements.(3)The evaluation results of the expert evaluation method show that the suitability of the engineering measures,plant measures and temporary measures of soil and water conservation are high,and the plant measures suitability is less appropriate.The reason is that the plant construction measures have not only to keep the soil and the water,but also to enhance the level of the surrounding landscape in recent years,so the cost of plant measures increases.(4)In general,the design of soil and water conservation measures of this project is scientific and reasonable,and the suitability is high.No soil erosion occurred.