WSP06673

• File Number: 8112.600
• Description: Arkansas White Red Basins Interagency Committee - AWRBIAC
• Basin: Arkansas
• Water Division: 2
• Date: 8/1/1976
• Title: Technical Memorandum - State Regional Futures and Problem Lists -- Activity 2 Phase II -- 1975 National Assessment --- part 2 of 3 -- Page 135 - 312
• Water Supply Pro - Doc Type: Report/Study

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Water use for mining, manufacturing, utilities, rural domestic, and
urban domestic and commercial purposes was based on unit water use
rates developed in the Kansas Long-Range Water Requirements study.
Water use for 1975 for each function was calculated using present
conditions; projected water use was taken from the Long-Range Water
Requirements study and modified to reflect changes made in the
population projections.

The evaporation rates from stock ponds and reservoirs represent average
annual gross evaporation from reservoirs in Kansas. These rates were
determined using all available evaporation records through 1958. Net
reservoir evaporation (equal to gross evaporation less average annual
precipitation) would be somewhat less than the quantities shown in
the tab les.

The growth in stock pond areas through the projection period is based
on the projected increase in the number of head of livestock and the
proportion of livestock water obtained from groundwater and surface
water sources. This seems to be a reasonable approach to determining
surface water area and no attempt was made to revise the estimated
acreages.

The projected population for Leavenworth County used in the National
Water Assessment is higher than the projection being used by Mid-America
Regional Council (MARC). The Assessment projections were made on a
regional basis and disaggregated to the county level so that counties
could be regrouped into different regions, if desired. Aamittedly,
projections made by different entities will be different. We believe
that the regional projection, approach gives better overall results than
could be obtained by making projections for individual counties and
summing them to get regional and state totals. The Leavenworth County
population is overshadowed by populations in Johnson and Wyandotte
counties and, since the projected population for the three counties
taken as a unit appears to be reasonable, no attempt was made to develop
a new population projection for Leavenworth County.

There are a number of population projections presently in use within
the state, It would be impossible to prove whether any of these were
better or worse than the ones used for the National Water Assessment.
Since the Assessment projections do have some standing as official
projections (modified to reflect a new, lower population growth rate)
and since they do have their basis in an economic study, there is no
justification for substituting any other set of projections.

The State'Forestry, Fish and Game Commission reports that the statewide
total acreage for fish and wildlife lands is approximately 240,000 acres
rather than the 90,100 acres shown in data compiled for the National
Water Assessment. The difference in the figures is explained by noting
that the Fish and Wildlife Lands in the Commission's total include lands
at the federal reservoirs which are managed for fish and wildlife purposes.
Many of these lands are in the flood pool areas of the reservoirs, and they
are included in the "Military Land" use classification for the Assessment
because their primary function is storage of flood waters.

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