Geology Reference
In-Depth Information
FIGURE 16.8 Simulated dissolved-solids concentrations in the aquifer beneath Hilton Head Island and Port Royal Sound. Modeling
shows changes in the confining bed and the aquifer for the years 2000, 2016, and 2032, assuming no changes in withdrawal rates for
Hilton Head and Savannah area. The clayey-silt confining unit contains slowly moving fresh, brackish, and salt waters.
(From Smith, 1994)
The interim regulations
(until release of the 2005
report) included the following: (1) reduced the quantity of
water available for withdrawal under current permits
(essentially capping future withdrawal at 1997 levels), (2)
allowed no new permits in worst areas, instead suggested
surface sources, (3) made 36 million gallons per day addi-
tional extraction available outside the worst areas, (4) required
24 coastal communities to prepare plans for future water
needs [this focused the need for land-use planning and con-
sideration of possible population growth], and (5) required
additional monitoring wells and modeling of groundwater
flow [Florida and South Carolina also increased monitoring
of their
Upper
Floridan Aquifer]. Additional use of the
Lower
Floridan Aquifer was discouraged until connections
between the two aquifers was understood.
In addition to what you learned about the scope of the
declining water pressure surface and possible engineered
barriers to saltwater intrusion from other questions in this
exercise, use the interim regulations and description above
to help answer
Question
9.
9.
As a community leader of one of the 24 small communities
in the region, you have been asked to join a team to develop
your community's plan for future water needs. Before the
first meeting of this new committee, all the members of the
committee are asked to prepare a list of short statements or
items that should be part of the discussion for planning
future water needs. You organize and complete your
response under the following headings:
a.
List of data needed to make the plans for future water
needs.
i
b.
List of possible objectives for a sustainable community
(for next 50 years) and your preferred objective.
c. List of possible options that could be considered for
meeting your water needs for the community.
