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<br />. <br /> <br />. <br /> <br />the fish species in the stream, may have its <br />substrate altered by varlOUS stream flows. An <br />established baseline of Cladophora dlstrlbution at <br />a constant flow will allow comparlsons wlth past <br />and future measurements. <br /> <br />Methods: <br />Aerial photography will be by both fix-winged plane and <br />helicopter. The fix-wing plane will take B/W photos <br />which will be used for 198~-1989 comparisons. The <br />helicopter will take TU photography which will be used <br />for local site and stream characterlstics. <br /> <br />Fixed-wing plane: black and whlte plates 1:3000. <br />Glen Canyon Dam to Pierce's Ferry <br />Little Colorado: Cameron to Malnstem <br />Paria: about 10 miles upstream <br /> <br />Helicopter: color TU movies, 2000' above surface <br />Glen Canyon Dam to Paria <br />Mainstem at Little Colorado up and down <br />stream about 10 miles <br />Little Colorado: upstream to Blue Springs <br />Paria: about 10 miles upstream <br /> <br />Requirements: <br />Contract with fixed-wing photo contractor <br />Arrangements with BR helicopter <br />Permits from FAA and National Parks <br />Placement of ground truth crosses (possibly) <br /> <br />B. Research from Glen Canyon Dam to Diamond Creek <br /> <br />Stream Discharoe <br /> <br />Objectives: <br />Establish stream gage rating at (1) known pre- <br />constant flow fluctuating flows and (2) durlng <br />constant flows. <br /> <br />Determine stream stage discharge during (1) pre- <br />constant flow when fluctuating flows are known, <br />(2) constant flow and (3) post-constant flow <br /> <br />Determine relationship between dam dlscharge data <br />and stream gage (below dam) discharge data. <br /> <br />Improve present flow routing model <br /> <br />Determine (if possible) the equilibration time for the <br />system using stage discharge data. <br /> <br />2 <br />