Browsing by Author "Satish, M.G."

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Effect of hydraulic conductivity on seawater fresh water interface motion in coastal aquifers
(2004) Mahesha, A.; Satish, M.G.
The motion of seawater-freshwater interface was studied for the linearly varying hydraulic conductivity in coastal confined aquifers. The problem under consideration included a series of freshwater injection wells located at a certain distance parallel to the coast. The hydraulic conductivity was assumed to be decreasing linearly from the coast towards inland. The motion of the interface was monitored for different gradients of the hydraulic conductivity and compared with the homogeneous case. The results indicated up to 12% lag in the repulsion of the interface depending on the injection rate as compared to the homogeneous case. Log-normal distribution was also considered for the hydraulic conductivity and a specific example is presented for illustrative purposes. 2004 Taylor & Francis Group, LLC.
Motion of seawater interface due to freshwater injection seawater extraction barrier
(2004) Mahesha, A.; Satish, M.G.
Transient motion of seawater-freshwater interface in coastal confined aquifers due to a series of injection-extraction well system is studied using an areal finite element model. The seawater near the coast and the freshwater is injected by a series of wells inland. The combined action of freshwater ridge formed by the injection wells and the extraction trough formed by the extraction wells resulted in the reduction of intrusion up to 80%. The well spacing affects the performance of the wells significantly and the spacing of less than 10% of the initial intrusion length was found to be effective in controlling the intrusion. Performance of the combined system of wells proved to be significantly better than the series of seawater extraction wells alone. The results from the present study would be useful in designing the system of injection-extraction wells in coastal aquifers to combat seawater intrusion.
The motion of seawater-freshwater interface was studied for the linearly varying hydraulic conductivity in coastal confined aquifers. The problem under consideration included a series of freshwater injection wells located at a certain distance parallel to the coast. The hydraulic conductivity was assumed to be decreasing linearly from the coast towards inland. The motion of the interface was monitored for different gradients of the hydraulic conductivity and compared with the homogeneous case. The results indicated up to 12% lag in the repulsion of the interface depending on the injection rate as compared to the homogeneous case. Log-normal distribution was also considered for the hydraulic conductivity and a specific example is presented for illustrative purposes. © 2004 Taylor & Francis Group, LLC.
(Effect of hydraulic conductivity on seawater—fresh water interface motion in coastal aquifers) Mahesha, A.; Satish, M.G.
2004
Transient motion of seawater-freshwater interface in coastal confined aquifers due to a series of injection-extraction well system is studied using an areal finite element model. The seawater near the coast and the freshwater is injected by a series of wells inland. The combined action of freshwater ridge formed by the injection wells and the extraction trough formed by the extraction wells resulted in the reduction of intrusion up to 80%. The well spacing affects the performance of the wells significantly and the spacing of less than 10% of the initial intrusion length was found to be effective in controlling the intrusion. Performance of the combined system of wells proved to be significantly better than the series of seawater extraction wells alone. The results from the present study would be useful in designing the system of injection-extraction wells in coastal aquifers to combat seawater intrusion.
(Motion of seawater interface due to freshwater injection seawater extraction barrier) Mahesha, A.; Satish, M.G.
2004