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<br />NAU Sand Bar Studies <br /> <br />Final Report <br /> <br />. <br />~ <br />r <br /> <br />Powell is above average and reservoir storage is high, Although efforts as part of adaptive <br /> <br /> <br />management of the resources of the Colorado River are underway to reevaluate current flood release <br /> <br /> <br />policies, all policy recommendations must take into account other resource concerns such as habitat <br /> <br /> <br />destruction, impacts to endangered species, loss of archeological sites, recreation and power- <br /> <br /> <br />production economics, and engineering constraints such as use of the spillways (Schmidt et al" 1998; <br /> <br /> <br />I 999a; Marzolf et ai" 1999), In addition, physical scientists charged with evaluating the effects of <br /> <br /> <br />floods that occur between September 15 and December 15 (non-motor season in Grand Canyon <br /> <br /> <br />National Park) must cope with imposed limitations on monitoring fieldwork, <br /> <br />, <br />~ <br />, <br /> <br />;.:; <br /> <br />:..< <br /> <br />~...-: <br /> <br />~:.:. <br />~I <br />,..- <br />~~ <br />..:~, <br />: ~:. <br /> <br />~.1; <br /> <br />"". <br /> <br />:'.. <br /> <br />~~ <br />'r <br />; ~~: <br /> <br />~.~: : <br />" <br /> <br />,-, <br />" <br />~:~j <br />L;' .~ <br />" <br />~{) <br />s. <br /> <br />r. .~ <br />~: . <br /> <br />33 <br />