Study Of The Mechanism Of Sluice Scheduling Action To Revier Water Quality And The Adjustable

Water is essential to humanity, and a large number of sulices are built to satisfy the requirements of rational water resources allocation in the river. However, natural rivers'flow regimes have been changed because of the existence of sluice, and migration and transformation processes of pollutants in water is also affected by building sluice. The negative impact of sluice on the water environment has gradually been confirmed, and now experts and scholars are committing to research on improving water environment by rational sluice scheduling and the relationshiop between sluice scheduling and diversification of pollutants concentration in river. To solve these problems, This paper carried out several specific works as follows:(1)Water quality conversion in the river reaches controlled by sluice (RCS) and the development of the mathematical model. Based on the migration and transformation regularity when the gates of sluice were opened and closed, water quality conversion in RCS is analyzed,and the results indicate that the sedimentation dominates pollutants'migration and transformation progress when impoundment, but the resuspension dominates when drainagement.Then,the hydrodynamic model considered sluice operation action and water environment model considered endogenous substance exchange action are built. Combined with the observed data during the monitoring experiment, the models are verified and the parameters are calibrated, and the migration and transformation progresses can be simulated well.(2) Water quality factors recognition and study of quantitative relationship. River water quality and quantit dominate the change process of water quality concentration, but the sluice scheduling is an important influence factor in RCS. According to assess the influence of these factors, The exponentiation relationship expressions between the concentration change rate and operation factors (such as gater opening size and number) in RCS, the logarithmic relationship expressions between the concentration change rate and sewage in RCS are both established, and these expressions relect the relationships among water quality concentration,operation factors and sewage indirectly. (3) Research on adjustable examination of dam on water quality improvement. The adjustable of sluice scheduling on river water quality improvement is defined,and the discrimination method of adjustable is development.Then,four antifouling sluices' adjustable are distinguished with the above method. According to the results,the author found that water quality can be improved some extently by the sluices scheduling and the sluices have a good level adjustable when sewage hevaily;In contrast, water quality cann't be improved by the sluices scheduling and the sluices have poor adjustable, even have no adjustable.(4) Research and development of system of the simulation of sluice scheduling action to water quality and. the relationships recognition.Based on Visualization Technology, relevant theory and practical principles,the systerm is developed,and it adapts to simulate the impacts on river water quality of sluice scheduling,sewage and storm.This paper is a benefieial exploration of searehing for mechanism of sluice scheduling action to revier water quality and study of the sluice'adjustable. It lays the theoretical foundation for study of relationship between pollutants concentration change and sluice operation factors and study of adjustable of water quality improvement by sluice scheduling, Provides scientific basis for reasonable sluice scheduling to improve water envionment.