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大汶河下游大清河河道及沿岸沙层平均厚3m,由于沙粒较粗,是理想的建筑材料。70年代以来,采沙规模越来越大,在29km长的河段上现有各类采沙场 28个。无序的采沙活动,不仅严重影响河道正常行洪,而且破坏堤坡及植被,严重影响大堤安全、河道管理及防洪抢险。其整治对策是:加强宣传,增强法制观念;依法加强管理,规范采沙行为;运用经济杠杆,实施以沙养河;加强对上堤道路的管理。
The average depth of the Daqinghe River and its coastal sand layers in the lower reaches of the Dawen River is 3m. It is an ideal building material due to the thicker sand grains. Since the 1970s, the scale of sand mining has been increasing. There are 28 various types of sand mining sites on the 29km long reach. The disorderly sand mining activities not only seriously affect the normal flood passage of the river but also destroy the embankments and vegetation, seriously affecting the safety of embankments, river channel management and flood control. The remediation measures are: to step up publicity and enhance the concept of legal system; to strengthen management according to law and regulate the behavior of sand mining; to use economic levers to implement the project of rehabilitating the river with sand; and to strengthen the management of the embankment roads.