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我区大部分土地属砂性土质,有4000多亩因开采建材用砂石而遗留下来的几米深的砂石坑无法利用,洗砂废水白白流失,不仅破坏了京郊的地形地貌,而且也浪费了土地资源和水资源。1989～1990年我们在花乡看丹渔场进行了矿石场
Most of the land in our area is sandy soil with 4,000 mu of gravel pits which can not be used due to the exploitation of building materials sand and stone and the loss of sand washing waste water not only destroyed the topography of the suburbs of Beijing but also Wasted land and water resources. From 1989 to 1990, we conducted an ore field in Huaxiang Dandan Fishing Ground