Evaluation Of Soil And Water Conservation S233 Highway

The research used the theory and method of soil and water conservation, and through investigation and monitoring research on the highway engineering project of S233 field, analyzes the process of building project in water and soil erosion, evaluated of soil and water conservation measures and the implementation of the plant vegetation recovery, proved the soil hydrological physical properties different division of soil and water conservation measures. We can draw the following research result and conclusion:1. Soil and water erosion areasThrough the observation and calculation, the average project background erosion modulus is 549.7t/(km2·a), and in the construction period, due to the strong disturbance, leading to the surface soil erosion modulus increased rapidly, its 3975t/(km2·a), happenned a serious soil erosion. In each category, new and prevention and control of the main road area expansion new loss were the largest, so the two area was the key control area.2 The effect on vegetation restorationThe project of the tree species were planted 14029 strains, shrubs species 27393 strains, the area of grass were sown 90448 m2. The Platanus orientalis were planted 6457 strains, the Salix babylonica were planted 4647 strains, and Sophora japonica Linn. were planted 2925 strains; Buxus megistophylla Lévl. were planted 9705 strains, Rosa multiflora were planted 4578 strains, Juniperus chinensis cv. kaizuka were planted 8608 strains, crape myrtle 4502 plants; Green platform were sown Festuca arundinacea and Cynodondactylon(Linn.)Pers. grass seed 12093m2, Trifolium repens and Bluegrass grass seed were sown 78355m2.The construction period of construction after a period of time, the trees survival rate in the project area more than 95%, which were reached to the scheme design standards. Each tree growth is good, the diameter at breast height, crown breadth, height has a good increasing, the new growth between 140 and 180cm, showed a good growth trend. In the implementation of the project of plant measures for the prevention and control of its coverage are both in the division of more than 45.5%, the total average coverage for 57.1%, the expansion of the section of the vegetation coverage was 70%, the mean highest, show that the prevention of branches and leaves thick vegetation, the growth is the best. The project vegetation restoration coefficient was 96%. The vegetation construction has made a significant achievement.3 The soil storage function in different control areaAccording to the experimental results, the control district of soil bulk density were significantly higher than the control of farmland, the total porosity (saturated water content), capillary porosity (retention storage capacity), non-capillary porosity (retention storage capacity), initial infiltration Rate and the steady infiltration rate is less than the value of farmland; in the control district, the new and expansion of the main circuit configuration of the road as shelter areas, the physical properties of soil hydrology of the control zone is better than the other. The prevention of fractal dimension of soil and soil bulk density showed a significant negative correlation, with porosity was positively correlated, with the infiltration rate was significantly positively correlated.