A nalyse the fluctuation and water level trend in Saigon - Dong Nai river system

Abstract

Beside the effect of gravitational forces, the water level in Sai Gon-Dong Nai River System is also affected by non gravitational forces such a wind, airpressure, rainfall and sea level rise. The purpose of this papcr is to simulate the water level of these river based on the tidal and non-tidal constituents, from that assess the role o f non-tidal constituents to water variation. In this study, the none-tidal data used includes the wind freld at surface, sea level pressure and the rainfall in Sai Gon-Dong Nai Basin. With the analyzed data series from 1980 to 2007, the results show thai after supplementing the non-tidal elements, the water level simulation quality is increased, the wind and rainifall have an important role to water level. The results also show that near river mouths, the water level raised 13 cm from 1980-2007 due to the global climate change.