AI Article Synopsis
- Saltwater issues in the Nandu River are worsening, with a focus on how variable runoff influences saltwater intrusion.
- Analysis shows that as runoff variability rises, the rate of salinity exceedance decreases significantly at certain points but increases in others, with sea level rise also affecting salinity levels.
- By the 2060s and 2100s, areas experiencing constant salinity exceedance rates are projected to shift downstream, offering insights for managing saline intrusion risks in estuaries globally.
Article Abstract
Saltwater problems in the Nandu River have gradually intensified in recent years. The effect of runoff variability (RV) on saltwater intrusion has not yet been fully revealed. Long-term trends in runoff and sea level (SL) were analyzed using the Mann-Kendall test and Theil-Sen estimation, and salinity exceedance rates (P) were calculated based on MIKE 11 and daily runoff distributions. As RV increased, Ps decreased the most at 16.0 km (6.7 %) and increased the most at 23.2 km (5.3 %). SL increased by 0.4 m and P increased the most at 20.5 km (11.7 %). Constant P is projected to move downstream by the 2060s and 210 s, with maximum increases in P of 6.2 % and 10.1 %, respectively. The ratio of changes in P due to changes in RV and SL is about 0.85. Constant P sections can be used to assess the risk of saline intrusion in some of the world's estuaries.
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| http://dx.doi.org/10.1016/j.marpolbul.2024.116889 | DOI Listing |
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