In the construction of Bowagou hydraulic fill dam in Dingxi County of Gansu Province,for lack of sand and stone materials,it had gained better effect to drain water through corrugated polyethylene pipe net.

• 在沙石料缺乏的甘肃省定西县播山沟水坠坝施工中，采用聚乙烯微孔波纹管网进行坝体排水，取得良好的效果。