The model files included in the directory with this README file are 
derived from the model described in the Balleau Groundwater, Inc.
report HYDROLOGIC MODEL OF BIG BEND GROUNDWATER MANAGEMENT 
dated June 23, 2010.  Specifically the model files are adapted
to enhance performance in the area of the Wet Walnut Creek
Basin.  The completed enhancements are described below.


1. The 2010 model overstated baseflow at the Nekoma gage and
understated baseflow at the Albert gage.  We inspected surface-water
catchment areas and modified the precipitation and runoff
relationships to develop an improved model representation of baseflow
at the Nekoma and Albert gages.

2. Representation of the alluvial aquifer structure 
in the valley of Walnut Creek has been improved.  We refined
the structural representation based on the geologic mapping of the
Kansas Geological Survey (1992) and on the work of Latta (1950),
McNellis (1973), Neuhauser (1996) and data from the WWC5 (2013)
database.

3. The simulated streambed conductance and river stage has been 
adjusted to refine the distribution of recharge to the aquifer
from runoff events.

4. We adjusted the hydraulic conductivity beneath Cheyenne Bottoms
to reflect the permeability of fine-grained sediments that have
been logged in the ponds.  The previous specification did not
represente fine-grained sediments at the base of the ponds.


Charts of observed and simulated flows at the Nekoma and Albert
gages located along the Wet Walnut Creek, after a applying the 
enhancements described above, are shown in 
file "Flow_Nekoma_Albert_gages.pdf", which is also located in the
directory with this README file.


Please direct any questions regading the model files or the
enhancements to:

Dave Romero, P.H. or Steven Silver, GISP at
Balleau Groundwater, Inc.
505-247-2000

REFERENCES:

Kansas Geological Survey, 1992, Geology – Generalized 
        Surficial (Polygons): http://www.KansasGIS.org.

Latta, B.F., 1950, Geology and Ground-water Resources
        of Barton and Stafford Counties, Kansas: Kansas 
        Geological Survey, Bulletin 88, p. 228. 

McNellis, J.M., 1973, Geology and Ground-Water Resources
        of Rush County, Central Kansas:  Kansas
        Geological Survey Bulletin 207.

Neuhauser, K.R., Wilcox, T.M. and Schumacher, B.A., 1996,
        Geologic map of Ness County, Kansas: Kansas
        Geological Survey, Map M-47, scale 1:50,000.

Water Well Completion Records (WWC5) Database,
        Accessed October 30, 2013 from
        http://www.kgs.ku.edu/Magellan/WaterWell/.