Effect of Runoff Change of North River and West River on Salt Intrusion in Tidal Estuary
Severe salt intrusion has occurred in Peal River Estuary in recent years.It deteriorates water supply quality in the sur-rounding regions.Rapid and accurate prediction of salt intrusion length is of great significance for optimizing the layout of water intake in river sections.The theoretical relationship between salt intrusion length and runoff was inquired based on the salt conservation equation.And the hydrodynamic-salinity model was established to analyze the response characteristics of salt intrusion to runoff.Then the response model of salt intrusion length and runoff in Modaomen was proposed.Different semi-empirical models are contrasted under the same hydro-logical conditions to investigate the applicability in the Modaomen estuary.The results show that the salinity boundary presents an S-shaped distribution under different flow combinations.The salt intrusion length L and the upstream runoff Q present a power-exponent function rela-tionship in theory.It is available to predict the salt intrusion length by using semi-empirical models.The conclusion shows that Savenije mod-el and L-Q model perform well,the variation of the real landform and the characteristics of power are taken into account in the model.Moreo-ver,the models are of high efficiency and accuracy,and can be used as a rapid assessment tool in salinity disaster of Modaomen estuary.
Pearl River Deltasalt intrusionsemi-empirical modelsrunoffModaomen
万方数据
维普
