And how to control it using physical models that have been created in a laboratory by a solution that consists of a study. The creation of the concept of soft fresh water pond to create a pond pump salt water along the coast, and to create a solid ground water concept. The result of the test, calculated according to the conditions of nature and from the relationship of the Ghyben-Herzberg with the corresponding value. The impact from the water pump will make the joints between the salt water and the groundwater layer move to a pond pump cause the salty water deep underground, but this will depend on the rate of water pump. The difference between salt water and fresh water and salt water level, which the test results, it was found that when the difference between fresh water and salt water is less and there is a high rate of the pump will cause salt water contamination at the pond pump. The fresh water at the rate of about 10 per cent of the rate of water will result in the joints between the salt water and the groundwater layer moved out onto the coastline. As a result, the water in the pond pump reduces the salinity or salinity does not exist at all. Efficiency of solid ground water depending on the depth of ground water below the solid level of salt water from the results of experiments showed that when solid depth of ground water is equal to the level of salt water would result in a powerful, solid, vertical underground water the most.
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