砒砂岩区沙棘植物柔性坝野外试验研究综述

Field Test of Seabuckthorn Plant Flexible Dam in Arsenic Sandstone Area

素有“地球癌症”之称的砒砂岩区位于黄河粗泥沙集中来源区核心区域,平均侵蚀模数20000 t/(km^(2)·a),其中粒径大于0.05 mm的粗泥沙含量高达80%左右。砒砂岩区沙棘植物柔性坝野外试验系统研究了该区土壤侵蚀的基本规律和分类系统、输沙机理、植物拦沙机理,以及植物柔性坝对水资源的调节作用,给出了支毛沟沟头沙棘植物柔性坝坝系系统工程技术和防止砒砂岩区土壤侵蚀的水土保持综合技术,为基岩产沙区的全方位治理和黄河粗泥沙治理提供了可靠的科学依据。

Arsenic sandstone area,“the earth cancer”,is located in the core area of the coarse sediment concentration source area of the Yellow River.The average annual erosion modulus is 20000 t/km^(2),and the content of coarse sediment with particle size greater than 0.05 mm is about 80%.The field test of seabuckthorn plant flexible dam in arsenic sandstone area studied the basic law and classification system of soil erosion,the sediment delivery mechanism,the mechanism of plant sediment retention and the regulating effect of plant flexible dam on water resources systematically and gave the system engineering technology of seabuckthorn plant flexible dam system built at the heads of tributary ditches and the comprehensive technology of soil and water conservation to prevent soil erosion in arsenic sandstone area,providing a reliable scientific basis for the comprehensive control of bedrock sediment yield area and the coarse sediment control of the Yellow River.