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Integrated modeling analysis of estuarine responses to extreme hydrological events and sea-level rise

Journal Article · · Estuarine, Coastal and Shelf Science
 [1];  [2];  [3];  [1];  [1];  [4]
  1. East China Normal University
  2. BATTELLE (PACIFIC NW LAB)
  3. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
  4. Institute of Geographic Sciences and Natural Resources Research

Estuaries are vulnerable to climate change and are particularly sensitive to extreme river discharge (RD) and sea-level rise (SLR). To understand the effects of extreme RD and SLR on estuaries, an integrated modeling approach is adopted to simulate hydrodynamic changes in the Yangtze River Estuary. Model results showed that SLR will intensify the estuarine hydrodynamics in water level, currents, and salinity. Water level, current speed, and salinity increased linearly with the magnitude of SLR. The hydrological model suggested a lower RD in the future. This will increase the saltwater intrusion, which will be more severe during the lower RD and drought extreme hydrological event (EHE) conditions. Model results also suggested that the saltwater intrusion is more sensitive to RD than SLR. In addition, the interplay between the RD and SLR will exacerbate the impacts of coastal oceans on estuarine hydrodynamics, especially during extremely low RD conditions. Moreover, the decrease of RD and deepening of the channel due to human activities will also amplify the effects of SLR on the Estuary, increasing the risk of coastal disasters.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1821705
Report Number(s):
PNNL-SA-165588
Journal Information:
Estuarine, Coastal and Shelf Science, Vol. 261
Country of Publication:
United States
Language:
English

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