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<br />r .. ... ..... . <br /> <br />""0.1-~ <br /> <br /> <br />. Y'r.~ <br /> <br /> <br />-, <br /> <br /> <br /> <br />~ <br /> <br />A second division which is pertinent to water and related land re- <br />sources planning is the division of the total area of the land and water <br />area. Of the 330 million acres of total area, there are approximately <br />3,900,000 acres of water area. Of this amount 2.7 million, or about <br />70 percent are water areas of over 40 acres In extent and about 1,200,000 <br />acres are in vater areas of less than 40 acres. Here again, there is con- <br />siderable variation among the various subbasins, with the Eastern Dakota <br />Tributaries having the largest percentage of total water areas, amounting <br />to about 2-1/2 percent of the total, to the Yellowstone where only 7/10 per- <br />cent of the total is vater surface. <br /> <br />Land Use - The use being made of the lands Is of relatively high im- <br />portance to the economy of the basin and to the Comprehensive Frame~ork <br />Study. In this connection it is also important to recognize the fact <br />that each acre of land may be utilized for more than one purpose. In fact, <br />some areas may serve several purposes simultaneously. Thus, the forested <br />area may also be used for grazing of cattle; recreatlonists may also use <br />it. ~11jlife generally abounds in such an area and it probably serves the <br />purpose of a catchment area for water, sno~fall, and thus becomes a good <br /> <br />10 <br /> <br />.' <br /> <br />- <br /> <br />" <br /> <br />, <br /> <br />~. <br /> <br />- <br /> <br />., <br /> <br />~ ..,' .~.,. <br /> <br />, <br />., <br />.... <br /> <br />-;:;:..: <br />.(~; ~ <br /> <br />, <br /> <br />t-, ~~:.. <br />. "";.h~ <br />;.-........" <br />(},..:t. <br />-,\~-\,: <br />-. '~.- <br />"""'. <br /> <br />~'.' <br /> <br />",<. <br /> <br />'. '" <br /> <br />'. <br />,. _. <br />,- <br />~-" <br /> <br />){~ <br /> <br />- <br />i":"--.- <br />.>,'->.' <br /><~~.}';. <br />:~o""._;' <br />.~,'l: -('A <br />rl~:"',;" <br />J"'''''O <br />~...<,. <br />. <br /> <br />- <br /> <br />~~"-....; <br />