1.1 IntroductionGroundwater is in contact with surface water. However, traditionally, groundwater and surface water were considered separate water resources (Winter, 1998). As a result, the management of groundwater and surface water resources presents the risk of allocating the same water twice in the water budget (Geosciences Australia, 2013). Not only are two resources in close contact, but they interact. Thus, Winter (1998) considered groundwater and surface water as a single resource. Surface waters are generally hydraulically connected to groundwater, but the interactions are difficult to observe and measure (Winter, 1998). The interaction depends on understanding the effect of topography, geology and climate of the groundwater flow system (Toth, 1970). Furthermore, biotic factors are also responsible for this interaction (Sophocleous, 2002). Due to its complexity, the study of the interaction of groundwater and surface water has been studied for over a century. The study was started using the analytical method developed by Boussinesq (1877). Even today, the study of groundwater-surface water interaction constitutes the most common research topic on river-aquifer interaction (Winter, 1995). Despite the difficulties of observing and directly measuring interactions, different techniques have been developed to understand the interaction. For example, measurement of hydraulic loads, water temperature in the aquifer, etc. The study of groundwater-surface water interaction is not limited to methods related to the physical properties of the aquifer but rather it is extended to chemical and numerical methods and some have even taken a statistical approach to quantify the interaction . Statistical methods such as principal component analysis (...... middle of article...... and additional numerical methods are obtained for the numerical model, which improves the model result compared to that built with non-site specific parameters (Unthank, 2013). A numerical groundwater model is built, calibrated and verified with field data. Then, a simulation of the model is carried out for different scenarios. Sensitivity testing is carried out to identify the most influential terrain parameters in these systems. Water utilities in the region will obtain information on the interaction between wells and aquifers. They could thus defend themselves with scientific information on the. flow directions and recharge sources in order to be able to respond to public demands and respond to incidents of suspected contamination be useful in identifying potential threats to water security as well as planning for future expansion of the field of water. capture.