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Parametric Studies on the Advancing Interface in Coastal Aquifers Due to Linear Variation of the Freshwater Level
Author(s) -
Mahesha A.
Publication year - 1995
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/95wr02040
Subject(s) - aquifer , interface (matter) , saltwater intrusion , parametric statistics , seawater , hydrology (agriculture) , groundwater , environmental science , intrusion , range (aeronautics) , geology , constant (computer programming) , oceanography , geotechnical engineering , geography , computer science , meteorology , engineering , mathematics , statistics , geochemistry , capillary number , aerospace engineering , capillary action , programming language
The transient motion of the freshwater‐seawater interface in coastal aquifers due to a constant lowering of freshwater levels at inland locations is simulated using a sharp‐interface, finite‐element model. The performance of the numerical model is compared with a Hele‐Shaw model. The numerical model is then used to perform parametric studies on an advancing interface that considers hypothetical cases over a wider range of possible conditions. The advancement of the interface was found to be dependent on the rate, location, and period of freshwater level variations. A seaward moving freshwater divide is formed by the lowering of the freshwater level. When the advancing interface crosses the seaward moving divide, aggressive intrusion is likely because of the reversed freshwater gradient existing landward of the divide. A safe zone for the freshwater extraction can be determined based on the movement of the interface and the freshwater divide.