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Water Quality, Seasonal Water-Level Changes, 1988-89, and
Simulated Effects of Increased Water Use From the Ozark Aquifer
Near Branson, Missouri
Imes, JL
Available from the US Geological Survey, Books and Open-File
Reports Section, Box 25425, Federal Center, Denver, CO 80225.
Water-Resources Investigations Report 91-4057, 1991. 61p, 27 fig ,
6 tab, 9 ref. Prepared in cooperation with the City of Branson and
the Missouri Department of Natural Resources, Division of
Environmental Quality.
Branson, Missouri, is the center of a rapidly developing
retirement community and tourist industry spurred by the
attractions offered by three large lakes nestled in the scenic
Ozark Mountains of southwest Missouri. The rapid pace of business
and residential expansion has created concerns regarding the
future groundwater quality and availability. A reconnaissance
survey to determine water quality in 34 wells open to the Ozark
aquifer indicates specific conductance ranged from 347 to 841
mS/cm at 25 C, and no fecal coliform bacteria were present in any
well. Chloride and nitrate concentrations in all wells were
considerably less than the Missouri Department of Natural
Resources criteria for public drinking water supply of 250 mg/L
and 10 mg/L. Analysis of 5 water samples for 33 volatile organic
compounds failed to detect any concentrations in excess of the
detection limits. Water levels measured in the Ozark aquifer near
Branson during the summer of 1988 and March 1989 indicate water
levels increasing in 23 wells, decreasing in 2 wells, and
remaining the same in 1 well. The water level increases ranged
from 4 to 111 ft. Water levels measured in the summer of 1989
indicate water levels generally declining to levels similar to
those in the summer of 1988. The water level measurements indicate
no evidence of regional water level decline from summer 1988 to
summer 1989. Monthly water use data for September 1988 to February
1990, collected from selected large water users in the Branson
area, indicate pumping rates in individual wells range from 0 to
about 18 Mgal/month. The model was used to estimate the increase
in drawdown from June 1989 to June 2010, assuming the large water
users will increase pumping rates by 20% every 10 years. Maximum
additional drawdown to June 2010 caused by the increased pumping
rates is estimated at about 10 ft in the upper zone and about 30
ft in the lower zone. (Lantz-PTT) 35 063175001
 Descriptors: *Missouri | *Ozark Aquifer | *Seasonal variation | *Simulation
analysis | *Water level fluctuations | Wells | *Water quality | *Water
use | Drinking water | Fecal coliforms | Groundwater quality | Model
studies | Pumping | Water level
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