METHOD FOR DETERMINING FRESHWATER UTILIZATION OF GROUNDWATER, DETERMINATION DEVICE, AND WATER PUMPING DEVICE FOR FRESHWATER UTILIZATION OF GROUNDWATER

摘要

To provide a method for determining the freshwater utilization of groundwater, that can perform determination assuming multiple well depths in one well.SOLUTION: The method for determining the freshwater utilization of groundwater includes: determining the freshwater utilization on an aquifer having salt concentrations of the groundwater different depending on the depth by using a well 10 equipped with a strainer capable of pumping up water from different depths; installing gap filling means 1 at a specific depth of the well 10 to block an underground water flow in a vertical direction of the well 10; pumping up the groundwater from the well 10 above the gap filling means 1 to measure a salt concentration; changing a setting depth of the gap filling means 1 to measure the salt concentration of the groundwater; and thereby determining a utilization depth where freshwater can be used.SELECTED DRAWING: Figure 1