06. Research build map for risk of salt intrusion in the Ma River delta in the context of climate change

Abstract

The Ma River’s coastal regions have experienced rapid economic growth and a tendency of changing crop production and economic structure. As a result, this region has high water demand and needs to mitigate water related calamities. The Ma River also flows to the sea through a number of estuaries, so during the dry season, when the water level in the river is significantly lower than the average of many years, the amount of flow from upstream decreases sharply, providing opportunities for salinity to move deeper into the river. This, particularly in years with an El Nino impact, causes significant harm to agricultural and aquacultural production in coastal areas. This paper focuses on creating a risk map of saltwater intrusion in the Ma River downstream in the context of climate change. High - risk locations are concentrated in coastal communes that are affected by saltwater, according to the findings. When compared to the existing situation, the climate change scenario includes varying amounts of change when it comes to rainfall and dry season flow in river basins. Summarizing the boundary conditions, the maximum salinity intrusion distance is rising, albeit at a relatively low rate a change of only 0.1 to 1.5 km from the existing state. The map
illustrating the danger of intrusion in relation to climate change will display a picture of the future trend of saltwater intrusion in relation to climate change as a basis for formulating strategies to prevent and reduce harm brought on by saltwater intrusion.