Research On Water Volume For The Sediment Transport In The Liaohe River

Liaohe River Basin has its unique natural and humanistic environment. The shortage of water resources of the trunk stream of Liaohe River and river sediment deposition problems exist at the same time and it has been a serious threat to the sustainable development of industrial and agricultural production in this region. However,at present, research on runoff sediment transport regular pattern for Liaohe River is little. The shortage of theoretical basis seriously restricted the work of water resources management scientifically and effectively. In view of the facts, the trunk stream of Liaohe River will be as the object of study in dissertation. Its research content is exploring the regular between Water and sediment and water demand for transporting sediment in the trunk of Liaohe River, Configuration mode of water resources.This research analyses the development of the trunk stream of Liaohe River, flow and water resources, the property of sediment(0.007,0.01、0.025、0.05、0.1、0.25、0.5、1.0、2.0、5.0mm), the relationship between flow and sediment, the effect of sediment (<0.007mm,0.007-0.01mm,0.01-0.025mm,0.025～0.05mm,0.05～0.1mm,0.1～0.25mm,>0.25mm)on two phase flow of water and sediment, the distribution characteristics of Suspended sediment in different distances and bed sediment characteristics in different time. It clears that scouring continues in upstairs, middle reaches is stable and downstairs deposit. Underlying surface, rainfall and human activity are the main causes of sediment in the trunk of Liaohe River. The distribution characteristics of the trunk of Liaohe River is sediment in the west and water in the east, the sediment becomes smaller particles with the growth of distance. The particles of sediment in wet reasons is larger than it in low water period. The sediment in0.025-0.1mm is main components of sediment deposition in downstairs, sediment in0.01～0.1mm influences water demand for sediment transport heavily. On this basis, computing water demand for transporting sediment using concentration method, water and sediment data method, net water method and energy method. The results show net water method is more suitable for water demand for transporting sediment. The water demand for transporting sediment in Tongjiangkou, Tieling, Mahushan, Pinganbao and Liujianfang are772.1、899.9、2551.5、809.5and1310.9m3/t under net water method. The water demand for transporting sediment in high and low water period in every station in Liaohe River are increasing with the growth of time, decreasing with the growth of mean flow and incoming sediment coefficient, increasing with the growth of sediment concentration. The research shows that only making full use of water in winter, creating bankfull discharge, integrated deployment depending on different particles and water conservancy project can we realize efficient utilization of water resources.The research studies on the different particle size water demand for transporting sediment, breaking the previous research model. The study has important innovative value on the research idea; This research is to explore the regular between water and sediment scheme of water resources in Liao river to use limited water resources rationally scientific efficiently. It is important innovation on solving practical problems in Liao river sediment deposition. The import innovativeness of this research is using multiple methods to ensure the Scientificity and accuracy of water demand for transporting sediment.