Laserfiche WebLink
<br />001235 <br /> <br />Dr aft - 9/ S 1 <br /> <br />HexiCOe <br /> <br />Thus the plains receive a much greater proportion of <br /> <br />their precipitation during the spring and summer months than do <br /> <br />the western parts of the state. <br /> <br />Hydrologic Regions <br /> <br />In order to begin an in-depth discussion of Colorado water, <br /> <br />it is convenie~t to have a frame of reference. <br /> <br />Figure 1 shows <br /> <br />the state's eight hydrologic regions. <br /> <br />In general, their bound- <br /> <br />aries correspond to the hydrologic boundaries defined by surface <br /> <br />watersheds. <br /> <br />Four of the regions are east of the Cont inental Div ide. The <br /> <br />Platte Region includes the North Platte whIch flows into Wyoming, <br /> <br /> <br />and the South Platte which flows out of the northeast corner of <br /> <br />, <br />\'Z,c--.:r--' <br /> <br />the state into Nebraska. <br /> <br />The Northern High Plains Region <br /> <br />includes the north and south forks of the Republ ican River and <br /> <br />the Arikaree. <br /> <br />It is treated separately in this study because of <br /> <br />its economic dependence on nonrenewable ground water from the <br /> <br />Ogallala aquifer. (See Chapter 2 for a discussion of the term <br /> <br />"nonrenewable.") The Arkansas Region consists of the Arkansas <br /> <br />River and its tributaries whIch flow Into Kansas in the south- <br /> <br />easterr'l port ion of the state. <br /> <br />The Rio Grande Region Includes the <br /> <br />Rio Grande and its trIbutaries which flow southward Into New <br /> <br />MexIco. <br /> <br />West of the Cont inental Divide there are also four hydro- <br /> <br />logic regions. <br /> <br />They are all part of the drainage system of the <br /> <br />Colorado River BasIn. The Southwest RegIon includes the San Juan <br /> <br />and Dolores Rivers and their tributaries. The GunnIson Region <br /> <br />5 <br />