Research On Soil And Water Conservation Monitoring Of Expressway In Anhui Province

Soil erosion has been with the production and construction activities of the human. Soil erosion has become the top environmental problems in China. With the expansion of the construction of human activity, the main issue of soil erosion has transferred from traditional areas of agriculture to the areas of development and construction.So it becomes an important part of soil and water conservation to curb soil erosion from development and construction activities. Soil and water conservation monitoring in exploitation and construction's project is a monitor for causes, amount, intensity, affected areas, damage of water and soil loss caused by production and construction activities. Soil and water conservation monitoring in development and construction projects is the basis of acceptance for water and soil conservation project; it is an important part for water and soil conservation work; it is the foundation of supervision and management for soil and water loss.The monitor layout of water and soil loss is basic work in exploitation and construction's project. Its rationality decides directly scientific and objective in soil and water conservation monitoring. At present, there is no unified norm for monitor layout of water and soil loss and it lacks of theoretical basis. For expressway construction project through different terrain, the monitor layout of water and soil loss causes uncertainty in the work of design.This study firstly used the way of stratified sampling in expressway in Anhui province. It divide Anhui province into Huaibei Plain,Jianghuai hilly,West Anhui Dabieishan,plain along the Yangtze River region,South Anhui Mountainous and it also divide expressway into Subject area,Temporary abandon slag,large dump,Construction camps,temporary path. Soil erosion prediction for different function units decides distribution of monitoring stations. erosion modulus for Subject area soil decides the length of roadbed samples. Finally monitoring sites are layout in Subject area by random sampling methods.Take the Bengwu expressway for example , construction area is divided into Jianghuai hilly,Huaibei Plain and Subject area,Special Facilities reconstruct,large dump,temporary house,temporary path. Soil erosion prediction for different function units decide distribution of monitoring stations。The results showed that the number of monitoring sites is 2,0,1,2,1,1 in Subject area,Special Facilities reconstruct,large dump,temporary house and Construction camps,temporary path in Jianghuai hilly and it is 8,1,1,5,2,1 in Huaibei Plain. Through the course of on-the-spot investigation, the calculation and adjustment, the length of roadbed samples is 2 in Jianghuai hilly and 3 in Huaibei Plain.