ABSTRACT
The research used several tools and methods, alone and in an integrated way, to understand the salinity variation along the river and to investigate the impact of different management actions. Application of these tools required intensive data to analysis hourly, daily and seasonal salinity changes. Consequently, they provide a better understanding and a baseline for water management interventions. The main function of any water resources model is to provide information about the system in order to support management planning and actions. The calibration of these models requires reliable and frequent water measurements. The monitoring stations were installed in places that ensured the divers were submerged during high and low tides. One-dimensional analytical model was used to predict seawater intrusion along the Shatt al-Arab estuary. The required information on the river discharge and cross-sectional profiles was provided by the related local authorities. It is difficult to measure the discharge accurately in an estuary considering the tidal fluctuation.
