引滦输水过程中悬浮物的沉降迁移特征

受黎河河道两岸铁矿砂影响,引滦输水黎河段水体中悬浮物含量远远高于引滦入津隧洞出口水的悬浮物含量。本文对引滦输水过程中悬浮物的沉降迁移特征进行了研究。结果表明:影响水体中悬浮物沉降速率的主要因素为悬浮颗粒粒径,影响悬浮物迁移量的主要因素为悬浮物的初始浓度。结合引滦输水过程中的悬浮物实际迁移情况,得出悬浮物主要影响引滦输水黎河河道,而汇入于桥水库的悬浮物含量较少且主要为粒径10μm的颗粒。应用研究成果,针对引滦输水工程的悬浮物污染特征,提出降低输水过程流速、增加入库前河道深度及种植水生植物等建议,以减少引滦输水过程中悬浮物含量。

Settlement and transport characteristics of suspended solids in process of Luanhe-Tianjin water diversion

Impacted by the riverside iron ore of Lihe river, the suspended matter content of Lihe river water body is much higher than that tunnel at exit of Luanhe-Tianjin water diversion. This article studied the settlement behavior and transport characteristics of suspended solds in process of LuanHe-TianJin Water diversion.The results show that the main factor that affect settling velocity of suspended matter is particle size, and the main factors influencing the removal rate of suspended solids content is initial concentration of suspended solids.Combining the reality of suspended solids transport in process of LuanHe-TianJin Water diversion,the paper got the conclusion that suspended solids mainly affect the riverside of Lihe river Luanhe-Tianjin water diversion, the content of suspended solids flowing into the YuQiao reservoir is fewer and is mainly ther particle size of <10 microns particles.In light of the pollutant feature of suspended solids in the water diversion,the paper put forward to reduce flow speed of water process, to increase the depth of GuoHe river and to grow aquatic plants before water into YuQiao reservoir so as to reduce the content of suspended solids.