【摘要】 华北平原地下埋深30~50 m以上分布着众多古河道。它是开采浅层地下淡水的源泉,"三水"调蓄转化的库容,旱、涝、碱、咸灾害综合治理的场所,农业综合开发的宝地,农田水利布设的基础,地震时沙基液化和震害的严重区。论述华北平原古河道开发利用取得的经济效益,提出开发利用中面临的新问题及对策。更多还原

【Abstract】 There are a lot of ancient river channels about 30～50 m depth under the ground of North China plain.The ancient river channel is the source of fresh groundwater.It is the container of adjusting precipitation,surface water and groundwater,the integrative site of controlling drought,flood and salina,the valuable land for integrative utilizing in agriculture and the water source of irrigating farm land,while it is the grievous area of sand liquefy and disaster when earthquake happen.Though great economic harvest in utilizing ancient river channels of North China plain has been gotten,but some new problems are appeared.Many ancient river channels could be found in the lower reach of a river and the fleet continental shelf all over the world.Some countermeasures are discussed in utilizing ancient river channels.更多还原