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<br />. 2 <br />l'rlbtUoary Area Lell1;th 0 f River <br />Verdigris River 8,150 sqU8.re rd lea }4!> mil.. <br />Grand N60Sho River 12,660 . . 455 . <br />CIJ:larron River 18,000 . " 600 . <br />North Canadian River 16,850 . . 800 . <br />South Canadian River 30,650 . " 900 " <br />Salt Fork: 6,700 . . 190 . <br /> <br />~ <br /> <br />5. The principal cities along the watershed are as follol'fS: <br /> <br />E!.!r. Population <br />Little Rock, Ark. . . . . . . . . . . . . . . 82.000 <br />Tulsa. Okla. . . . . . . . . . . . . . . . . . 150.000 <br />'"liohita, Ke.ns . . . . . . . . . . . . . . . . . . 110,000 <br />Okle.home. City, Okla.. . . . . . . . . . . . . . . 185,000 <br /> <br />. <br /> <br />6. Agriculture 1& the principal industry throughout the watershed. <br />Irrigation 1s praotioed west of a line through the Canton nesavoir. wi th <br />sugar beets, alfalfa, molons, corn, grains, and fruit 8S the principal <br />orops. Hestern Kansas is noted for its wheat, and in the e&stern 'vater.... <br />shad the prinoipal crop 18 ootton. Rioe growing 1s con!1ned to a dls~ <br />trict near the mouth of the Arkansas River. The raising and feeding of <br />livestock 1s widely practiced. <br /> <br />7. Industrial developnent is conneoted principally w1th the natural <br />resources. The ~unt&in3 are highly minerali%edj snIt and gypsum are im~ <br />portant in western Kansas, and brick, tile and cement plants utllhe the <br />rook, shale, and olay throughout the area. A large part of the famous <br />llid-Contlnent Oil and Gas field lies in thils: watershed. The lumber in~ <br />dustry in confined to the eastern part. <br /> <br />B. There is a wide mnga of climatic conditions in the Arkansas <br />River watershed. The western portion is arid, while the eastern portion <br />is hum1d. Rains in the arid region are frequently of oloudburst inten~ <br />atty. The average rainfall 1s 25 inches in the mountains, reducing to <br />12 inches at tho foothills, and gradually inoreasing to about 50 inches <br />near the mouth of the Arka.nS8.S River. <br /> <br />- <br /> <br />~ <br /> <br />9. !d.jor floods in the loTTer Arkansas RiTer originate from ston:lS <br />in the eastern portion of the vmtershed, comprising the Verdigris, Jrand, <br />Illinois, Poteau, e..nd other minor strea..'I'ls. StorI!UI on the western portions <br />of the Canadian and Cimarron River systems do not generally extend to <br />these tributaries. The Grand River oontributed nearly one-quarter of the <br />peak flow ard total vo1u::lO of the 1927 flood. <br /> <br />10. The peak flows of reoord alan,:; the Arkansas are: <br />. At Caddoa, Colo. . . . . . . .170,000 o.r.a., <br />At Tulsa, Okla. . . . . .slightly over 200,000 c.r.s. , <br /> At Forl Sl:d th. Ark. . . . . .550.000 c.f.s.. and <br /> At Little Rook, Ark. . . . . .830.000 o.r.s. <br />2412 <br />