Numerical Simulation of Saltwater Intrusion in Response to Sea-Level Rise

Langevin, Christian D.; Dausman, Alyssa

doi:10.1061/40792(173)376

Cited by 7 publications

(7 citation statements)

References 8 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TVD simulations better represented the presumed level of hydrodynamic dispersion as evidenced by an improved ability to represent observed salinity variations compared with finite‐difference transport solutions. Related work by Langevin and Hughes (2009) showed that calibration of a highly parameterized salt water intrusion model can result in parameter surrogacy, such as heterogeneity artifacts in the presence of numerical dispersion. These artifacts can be reduced by using high levels of grid resolution or TVD schemes that minimize numerical dispersion and also by using uniform concentration weighting schemes for calibration instead of assigning weights that are proportional to the concentration value.…”

Section: Model Development and Calibrationmentioning

confidence: 99%

Effect of Sea‐Level Rise on Salt Water Intrusion near a Coastal Well Field in Southeastern Florida

Langevin¹,

Zygnerski²

2012

Groundwater

View full text Add to dashboard Cite

A variable-density groundwater flow and dispersive solute transport model was developed for the shallow coastal aquifer system near a municipal supply well field in southeastern Florida. The model was calibrated for a 105-year period (1900 to 2005). An analysis with the model suggests that well-field withdrawals were the dominant cause of salt water intrusion near the well field, and that historical sea-level rise, which is similar to lower-bound projections of future sea-level rise, exacerbated the extent of salt water intrusion. Average 2005 hydrologic conditions were used for 100-year sensitivity simulations aimed at quantifying the effect of projected rises in sea level on fresh coastal groundwater resources near the well field. Use of average 2005 hydrologic conditions and a constant sea level result in total dissolved solids (TDS) concentration of the well field exceeding drinking water standards after 70 years. When sea-level rise is included in the simulations, drinking water standards are exceeded 10 to 21 years earlier, depending on the specified rate of sea-level rise.

show abstract

Section: Model Development and Calibrationmentioning

confidence: 99%

Effect of Sea‐Level Rise on Salt Water Intrusion near a Coastal Well Field in Southeastern Florida

Langevin¹,

Zygnerski²

2012

Groundwater

View full text Add to dashboard Cite

show abstract

“…An inland toe migration in the order of 5 km was achieved in the two studies for a 0.5 m sea-level rise. Langevin and Dausman (2005) evaluated the interface movement in response to sea level rise based on the generalized characteristics of the highly permeable Biscayne Aquifer of Broward County, Florida. The seawater intrusion was investigated under three cases of variable annual rates (0.9, 4.8, and 8.8 mm/year) of sea-level rise.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Seawater Rise on Seawater Intrusion in the Nile Delta Aquifer, Egypt

2013

View full text Add to dashboard Cite

Several investigations have recently considered the possible impacts of climate change and seawater level rise on seawater intrusion in coastal aquifers. All have revealed the severity of the problem and the significance of the landward movement of the dispersion zone under the condition of seawater level rise. Most of the studies did not consider the possible effects of the seawater rise on the inland movement of the shoreline and the associate changes in the boundary conditions at the seaside and the domain geometry. Such effects become more evident in flat, low land, coastal alluvial plans where large areas might be submerged with seawater under a relatively small increase in the seawater level. None of the studies combined the effect of increased groundwater pumping, due to the possible decline in precipitation and shortage in surface water resources, with the expected landward shift of the shore line. In this article, the possible effects of seawater level rise in the Mediterranean Sea on the seawater intrusion problem in the Nile Delta Aquifer are investigated using FEFLOW. The simulations are conducted in horizontal view while considering the effect of the shoreline landward shift using digital elevation models. In addition to the basic run (current conditions), six different scenarios are considered. Scenarios one, two, and three assume a 0.5 m seawater rise while the total pumping is reduced by 50%, maintained as per the current conditions and doubled, respectively. Scenarios four, five, and six assume a 1.0 m seawater rise and the total pumping is changed as in the first three scenarios. The shoreline is moved to account for the seawater rise and hence the study domain and the seaside boundary are modified accordingly. It is concluded that, large areas in the coastal zone of the Nile Delta will be submerged by seawater and the coast line will shift landward by several kilometers in the eastern and western sides of the Delta. Scenario six represents the worst case under which the volume of freshwater will be reduced to about 513 km(3) (billion m(3) ).

show abstract

“…This study uses SEAWAT, a 3D finite difference numerical model Langevin and Dausman (2005), to simulate the variable-density groundwater flow and SWI in Talar aquifer. The SEAWAT (Guo and Langevin 2002) model used in this study incorporates the MODFLOW-2000 (Harbaugh 2005) and MT3DMS (Zheng and Wang 1999), in the GMS 10.2 package.…”

Section: Groundwater Modeling Packagementioning

confidence: 99%

“…Recent studies have predicted an SLR value of between 20 and 82 cm by the year 2100, indicating an extensive inundation of coastal regions (Vermeer and Rahmstorf 2009;IPCC 2013). Langevin and Dausman (2005) anticipated that an SLR of 0.5 m in Florida's coastal aquifers would result in 1.5 km increase in seawater wedge toe penetration in Broward County's unconfined aquifer, whereas the same SLR would result in about 0.4 km saltwater intrusion in the Nile Delta's confined aquifer. Carretero et al (2013) numerically simulated the SLR in Partido de La Costa, Argentina.…”

Section: Introductionmentioning

confidence: 99%

Investigation of transient sea level rise impacts on water quality of unconfined shallow coastal aquifers

Ranjbar

Cherubini

Saber

2020

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

This study analyzes the impacts of 1 m gradual and instantaneous sea level rise combined with pumping activity on seawater wedge toe location in a shallow coastal aquifer located in the southern shores of the Caspian Sea. The gradual sea level rise scenario investigates the transition variation of seawater wedge toe due to linear and parabolic between the years 2015 and 2100. Moreover, the maximum value of saltwater intrusion due to variations in hydraulic conductivity and aquifer's recharge rates is analyzed and compared with flux-controlled and head-controlled boundary condition systems. A tree model is also applied to develop a linear regression between the sea level rise and aquifer parameters derived from different real coastal aquifers in the literature. The results indicate that 1 m gradual sea level rise in the study area by the end of the year 2100 considering all 1320 pumping wells leads to a 6.5% depletion of freshwater volume. The results also show that the peak saltwater intrusion rate during nonlinear gradual sea level rise rises with increasing the aquifer depth and horizontal hydraulic conductivity and the time to reach the saltwater intrusion peak rate considering the current recharge rate of an aquifer is about 48 m. The maximum saltwater intrusion lengths estimated by the tree model are 48 m and 10.42 m for head-controlled and flux-controlled boundary conditions, respectively, indicating that the saltwater intrusion in the aquifer due to instantaneous seal level rise is closer to head-controlled boundary conditions.

show abstract

Numerical Simulation of Saltwater Intrusion in Response to Sea-Level Rise

Cited by 7 publications

References 8 publications

Effect of Sea‐Level Rise on Salt Water Intrusion near a Coastal Well Field in Southeastern Florida

Effect of Sea‐Level Rise on Salt Water Intrusion near a Coastal Well Field in Southeastern Florida

Impacts of Seawater Rise on Seawater Intrusion in the Nile Delta Aquifer, Egypt

Investigation of transient sea level rise impacts on water quality of unconfined shallow coastal aquifers

Contact Info

Product

Resources

About