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<br />f:~t~ <br />c...;-;9 <br /> <br />l'\' <br />00 <br />-..J <br />OJ <br /> <br />',' <br />~:'::>;.' <br />..::~i~\' <br /> <br />.::-." <br /> <br />4,099,000 acre-feet per year for the low "without EET" (LWO) scenario <br />(table 4.1) to create a low "with baseline case "EET" scenario (labeled <br />LWB) whose year 2000 consumption for the Upper Basin totals 4,351,000 <br />acre-feet per year. Similarly, a low "with accelerated synfuel case EET" <br />scenario (labeled LWA) is created by adding. year 2000 consumption by EETs <br />and the associated growth (442,000 acre-feet per, year from table 7.5) to <br />the projected depletions of 4,099,000 acre~feet per year for the LWO <br />scenario. <br /> <br />By so combining all such possibilities, MWB; MWA, HWB, and HWA <br />scenarios can also be created (see table 7.6). As can be seen, the propor- <br />tion of any scenario's total consumption attributable to the postulated <br />EETs and the associated growth is relatively small--IO percent at most. <br />On the other hand, total consumption for the scenarios (column 4) shows <br />significant increases over the average annual depletions that occur under <br />present levels of development (3,116,000 acre-feet per year), with the <br />increases ranging from a low of 32 percent for the LWO scenario to a high <br />of 68 percent for the HWA scenario. <br /> <br />The importance of developing a range of "with EET" scenarios lies <br />in the fact that the answer as to whether water is available for EETs <br />will depend, in part, upon the amount of water that may be developed for <br />other consumptive uses. This matter is addressed below. <br /> <br />.--~ <br /> <br />LEGAL AND INSTITUTIONAL FACTORS AFFECTING THE AVAILABILITY <br />OF WATER <br /> <br />In the first instance, of course, the availability of water for EETs, <br />or for any other use for that matter, is a function of physical factors . <br />such as the hydrology of a particular river basin or the geohydrology of <br />a ground water formation. However, numerous legal and institutional ar- <br />rangements also have a bearing upon the allocation of water among States <br />and among private claimants within a State. Thus, the question as to the <br />physical availability of water must be addressed within the context of the <br />applicable legal and institutional factors, each of which is briefly re- <br />viewed below. <br /> <br />The Law of the River <br /> <br />The amount of water available for consumption in the Upper Colorado <br />River Basin is a function of an international treaty, interstate compacts, <br />U.S. Supreme Court decrees, and several acts of Congress. These are often <br />collectively referred to as the "Law of the River." <br /> <br />xxxi <br />