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<br />003152 <br /> <br />Page 51 <br /> <br />respect to the water storage and delivery projects assumed to be in place. In <br /> <br />each case, effective demand is assumed to exist for all of the water which the <br /> <br />included projects are capable of delivering. <br /> <br />Table V-2 also shows 'for each case the projected effects of those demands <br /> <br />upon Colorado River water use under the two assumptions regarding runoff. It <br /> <br />reveals that the prospect of Upper Basin water shortages is remote, which may be <br /> <br />a consolation to present Upper Basin water users but a source of alarm to those <br /> <br />who fear that Upper Basin water entitlements may be lost if they are not soon <br /> <br />perfected. It also reveals that prospective Lower Basin shortages will be <br /> <br />substantial. <br /> <br />, <br /> <br />~ <br /> <br />C. Institutional Aspects <br /> <br />One of the objectives of the study was to estimate the potential effects of <br /> <br />changes in institutional arrangements upon the use of increased flows, inasmuch <br /> <br />important in the near future as competition for limited water supplies increases <br /> <br />~ <br /> <br />as institutional change is an ever-present fact of life, and may be particularly <br /> <br />in the Colorado River'Basin. <br /> <br />Two different sets of institutions influence water use in the basin. The <br /> <br />first set consists of the international treaty, the two Colorado River <br /> <br />interstate compacts, court decisions such as Arizona v. California, and the <br /> <br />operating rules for the major water regulation and storage projects of the <br /> <br />Bureau of Reclamation. These institutions, which are often referred to <br /> <br />collectively as the "law of the river," shape the pattern of interstate water <br /> <br />allocation. The interstate compacts have yet to come into use, because the <br /> <br />states of the Upper Division have never made full use of their compact <br />