Status of ground-water resources at U.S. Navy Support Facility, Diego Garcia; summary of hydrologic and climatic data through September 1993

Status of ground-water resources at U.S. Navy Support Facility, Diego Garcia; summary of hydrologic and climatic data, January 1993 through March 1995

“…Pumpage from the Cantonment area increased in 1991 when the area began supplying an extra demand due to decreased pumpage at Air Operations (Torikai, 1995). From May 1991 through April 1992, 10 wells at Air Operations were temporarily closed because of an underground fuel pipeline leak near those wells.…”

Status of ground-water resources at U.S. Navy Support Facility, Diego Garcia; summary of hydrologic and climatic data, January 1994 through September 1996

“…Pumpage from the Cantonment area increased in 1991 because of decreased pumpage at Ak Operations (Torikai, 1995). From May 1991 through April 1992, 10 wells at Ak Operations were temporarily shut down because of an underground fuel-pipeline leak near those wells.…”

“…From April 1992 through early May 1993, meter readings of injection were not available, and daily injection at each of the three wells was estimated to be one-third of the total daily withdrawal from wells AO-13 through AO-15 which provided the injection-supply water (Torikai, 1995). Monthly mean withdrawal and injection at wells AO-10 through AO-15 are shown in figure 7.…”

“…It utilizes six wells (AO-10 through AO-15), and consists of pumping about 150,000 gal/d of water from wells AO-14 and AO-15 and directing this water through the common collection main to the wells nearest the leak (AO-10 through AO-12), where it is injected back into the ground. Well AO-13 has been used only intermittently since the fuel leak was detected in 1991 (Torikai, 1995).…”

“…The island's drinking-water supply is derived from ground water, and recharge to the ground-water system is from rainfall. Since 1985, the island's water-supply system has produced about 1 Mgal/d by maintaining low individual pumping rates at the many scattered wells (Torikai, 1995). Ground water is pumped from lens-shaped bodies of freshwater floating on seawater.…”