HA 730-N Hawaii Regional summary

GROUND WATER ATLAS of the UNITED STATES
Alaska, Hawaii, Puerto Rico and the U. S. Virgin Islands
HA 730-N

Hawaii Regional summary

Figure 34 Map showing the average annual precipitation in the Hawaiian Islands

Figure 36 Map and geologic sections showing the composition of the Hawaiian Islands

Figure 37 Cross sections showing the location of the freshwater lens floating on a body of saltwater within an aquifer
Figure 38 Cross section showing the vertically extensive freshwater-lens system in eastern Kauai
Figure 39 Cross section showing the occurrence of ground water in the volcanic-rock aquifers
Figure 40 Map showing the location of wells completed in the Hawaiian Islands

Figure 41 Graphs showing that water levels in a well in northern Oahu are affected by ocean tides and withdrawals from a nearby wellfields
Figure 42 Graphs showing that water levels in southern Oahu have declined over time
Figure 43 Graph showing water levels in a well in central Oahu fluctuating in response to changes in rainfall
Figure 44 Graph showing that the discharge of springs that issue from the volcanic-rock aquifer in the Pearl Harbor area varies directly with changes in aquifer water level

Figure 45 Map showing location of wells or springs with confirmed organic-chemical contamination of ground water in Hawaii
Table 2 Table showing organic chemical contaminants confirmed in ground water in Hawaii

Figure 46 Pie chart showing use of fresh ground-water withdrawals during 1995