西气东输工程郑州至上海段水土流失及防治措施

西气东输工程线路长、规模大 ,涉及地貌类型多 ,施工方式多 ,造成的水土流失形式多 ,局部水土流失量不大但总量较大。郑州至上海段扰动地表面积 2 0 81 47hm2 ,将新增水土流失量 78万t ,其中弃渣流失量 64 4万t。水土流失防治体系包括预防措施、治理措施、临时措施和水工保护四方面 ,其中弃渣拦挡保护是治理措施的重点

Soil and Water Loss and Prevention Measures for Zhengzhou—Shanghai Section of Gas Transportation Project ｆrom West to East

The gas transportation project from west to east has a long distance, large in scale, covered various types of landforms, various means of construction, various types of soil and water loss and the amount of soil and water loss at local area is not much but large in total quantity. The disturbed surface area of Zhengzhou-Shanghai section is 2 081.47 hm 2 and the newly increased amount of soil and water loss will be 780 000 tons, among which, the discarded residues 644 000 tons. The prevention and control system of soil and water loss includes four aspects of prevention measures, control measures, temporary measures and hydraulic protection, among which, the discarded residues retaining and protection is the key of control measures.