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<br />Natural Sources 47% <br /> <br />I <br />41 <br />,if <br />.> <br />~' <br />l' <br />~ '21 <br />allocated through a long history of :t ..~ <br />appropriations and lIegotlations +:,',~ <br />. that include acts, co,r"pactS, decrees,~: ,~. <br />and an internationaHreaty; :known '1!~" U <br />collectively as The Law of the River, .~ .~ <br /> <br />About half of the~:es"!'t SalinitY]'] <br />concentration in the .,..,lorado River~] , <br />at Hoover Dam near:LaSVegas,'r'.i.; <br />Nevada, is attributed to 1I1Itural ", <br />sources, The remaim!\ghOlfis ,;,~ <br />man-induced asindi~atedln "1 <br />figure 1., <br />.; <br />':1 <br />~ <br />,{<4 <br /> <br />I <br />. ..~ <br />"-:~ <br />, <br />, <br />~ <br />,;J <br />:;{ <br />'\-! <br />'1 <br />g <br />'1 <br />j <br />J <br />i <br />, \~i <br />_}1 <br /> <br />Therlver's water/noW and in <br />f'l!ture years,.hasbe~!\ fully <br /> <br />THE PROBLEM <br /> <br />"" <br />CJ1 <br />-J <br />o <br /> <br />The Colorado River Basin (Basin) <br />encompasses portions of seven <br />states, The river flows over <br />1,400 miles from its headwaters in <br />Colorado to its terminus in the Gulf <br />of California in the Republic of <br />Mexico, On its journey, it joins with <br />tributaries from Wyoming, Utah, <br />and New Mexico; flows through the <br />Grand Canyon; and provides state <br />boundaries for Nevada, Arizona, <br />and California, <br /> <br />" <br /> <br />'). <br /> <br />Exports 3% <br /> <br /> <br />Municipal a.nd <br />Industrial 1 % <br /> <br />:Jit--...,,,,- <br /> <br />Irrigation 37% <br /> <br />Reservoir <br />Evaporation 1.2% <br /> <br />',-, <br />':'. ,~ <br />::1 <br />~ <br />... ,~1 <br />J <br />~ <br /><:',i <br />" <br /> <br /> <br />Figure 1. - Salt loading sources, <br />