Investigation of saltwater intrusion in thach han river system by mike hydro river package

Saltwater intrusion is one of the most severe problems for worldwide coastal regions, leading to negative impacts on both human and aquatic inhabitant communities. Quang Tri province, located in Central Coast region Vietnam, faces consequences saltwater because its dense river network El Nino phenomena’s influences. To analyse hydrological, hydraulic processes as well investigate intrusion’s situation this authors adopted MIKE HYDRO River package obtained results with good agreements measured data from survey campaigns. The present conditions scenario shows that intrudes Thach Han Cam Lo rivers a distance 25.35 km 15.04 respectively, where salt concentration under 0.75‰ water can be drunk irrigated. large discharge 30 m3/s only push 1.85 sea, which insignificant comparison value seawater wedge length, system mitigated slightly. Since consider hydrological droughts, future scenarios 2030 2050 have slight differences present, topography flow remain unchanged. Based above results, non-structural measurements are not recommended deal scenarios, local authorities should structural solutions, e.g. constructions anti-salt dams, during decision-making process.