Fresh water collecting device, has control unit controlling flow rate of pump based on depth, and sensor measuring average level difference between water surfaces inside and outside envelope, respectively

摘要

The device has a flexible sealed envelope (110) surrounded with salted water isolated from the quantity of water above a sub-marine fresh water source (105). A depth control unit (145) controls a flow rate of a pump (125) that pumps fresh water above an interface between the fresh water and the salted water, based on the depth. A sensor (150) measures an average level difference between a water surface inside the envelope and a water surface outside the envelope. An independent claim is also included for a method for collecting water from a sub-marine fresh water source.