Estuary area is commonly densely populated and economically developed. However, the estuarine regions are also the intersections of river freshwater and marine saltwater. Such regions are prone to saltwater intrusion. Serious saltwater intrusion may affect the industrial and domestic water use, and has a negative impact on the ecological environment (Palmer et al., 2015). With the impact of various natural and anthropologic factors such as rising sea level, climate changes, increased riverine water diversions, and regulations of large-scale hydro-projects in river basin, saltwater intrusions have become important issues for many estuaries in the world (Bhuiyan et al., 2012; Jacob et al., 2013; Guerra et al., 2019; Rodrigues et al., 2019). The control and mitigation the harm of saltwater intrusion in the engineering practices of water resource utilization, not only in river basins but also in estuarine areas, have drawn remarkable concerns (Kacimov et al., 2009; Rodrigues et al., 2019).