control dam 是什么意思

	1.	In this paper , the method combined the “ s ” shape sediment control dam with the dredged channel has been put forward 为此，在比较各种疏浚方案效果的情况下，提出了挖泥槽与增设折线型防淤堤相结合的清淤疏浚措施。
	2.	In order to reduce the re - deposit volume of the dredged channel , the method must be based on decreasing the oncoming sediment , changing the mouth site , builting the sediment control dam and raising the reservoir level 为了最大限度地减小疏浚挖槽的回淤量，必须依靠控制上游来沙量、调整入水口门位置、加设防淤堤及提高库水位等手段，而不能通过调整挖泥槽宽度、位置及数量等措施来达到目的。

control dam是什么意思