Land purchase

soil and water loss

division function zones

and main body functions in Shanxi electric transmission line project were analyzed and appraised based on the soil and water conservation plan of electric transmission line project.Analyses indicated that the land purchased for the project was composed of permanent land and temporary land.Permanent land was used for tower footing area and temporary land included construction area

construction roads

and abandoned slag plots.The ratio of permanent land to temporary land was found to be 1∶9.The amount of soil erosion from construction roads was the largest

accounting for 40%~70% of the total amount of soil erosion.Therefore

construction roads were the important prevention and monitoring parts.The area for electric transmission line was divided into the plain area and the mountain and gully area by topographical features.Then they were subdivided into tower footing zone

construction yard zone

construction road zone

and abandonment slag plot zone.According to analysis

the measures in feasibility study report and the system of soil and water conservation were perfect in tower footing zone.However

the system of soil and water conservation was not designed in the temporary zone

and it should be emphasized during comprehensive prevention in the temporary zone.