WSP11418

• File Number: 8407.500
• Description: Platte River Basin - River Basin General Publications - Missouri River
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 12/1/1971
• Author: Missouri Basin Inter
• Title: Missouri River Basin Comprehensive Framework Study - Volume VI - Land Resources Availability - Hydrologic Analyses and Projections - Appendix
• Water Supply Pro - Doc Type: Report/Study

small and many farmers obtain supplemental income
from lumbering. Of the total land once in cultivation,
about one-third has been returned to forests or grass.
Timber production and grazing are the major land uses
except in areas of better soils where general farming
predominates.

Ozark Plateaus

Subbasins and Subregions

The Missouri Basin has significant variations in topog-
raphy, dimate, resources, economy, and social aspects.
To facilitate the study, the basin was divided into eight
planning areas. Because the source and composition of
the basic data records used in this study varied with res-
pect to boundary delineations, both "subbasins" and
"subregions" were designated (figure 4).

Subbasins are hydrographic areas drained by desig-
nated major tributaries. or groups of tributaries of the
Missouri River, induding associated closed basins. Sub-
regions are groups of counties delineated to approximate
the subbasins by county lines because of statistical data
availability on this basis, and to facilitate economic
analysis.

6

The tenns "subbasins" and "subregions" are used in
this appendix to designate the type of boundary area for
which the data were developed. For planning purposes,
the data developed by regions and subregions can be
applied to the corresponding basin and subbasin areas
with no significant loss of reliability.

S'ubbasins and subregions discussed in this report are:

Name Narrative Abbreviation

Upper Missouri River Tributaries Upper Missouri
(Includes all of the drainage of
the Missouri River above the
mouth of the Yellowstone River)

Yellowstone River Subbasin (In- Yellowstone
cludes all of the drainage of the
Yellowstone River)

Western Dakota Tributaries (In-
cludes all the tributaries flowing
from the west between the mouths
of the Yellowstone and Niobrara
rivers)

Western Dakota

Eastern Dakota Tributaries (In-
cludes the drainage area east of
the Missouri River from the
mouth of the Yellowstone
River to Sioux City)

Eastern Dakota

Platte-Niobrara Subbasin (In. Platte-Niobrara
cludes all of the drainage of the
Platte and Niobrara rivers)

Middle Missouri River Tributaries Middle Missouri
(Includes tributaries to the Missouri
River on the west bank from the
mouth of the Niobrara River to
the mouth of the Kansas River,
excluding the Platte River, and
the tributaries on the west bank
from Sioux City to Kansas City)

Kansas River Subbasin (Includes Kansas
all of the drainage of the Kansas
River)

Lower Missouri River Tributaries Lower Missouri
(Includes tributaries of the Missouri
River below the mouth of the
Kansas River)