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Scupe of 1Vork . Ri�de Headwacers Restoration Project <br />bedload vs. mean flow deptlr, disclrc�r;e vs. % time e.rceeded, aad (rl�schar�e x <br />recurrence probability) vs. year recc�rrence of peak flow event. Tabulate and <br />discuss the results of these ca(culations. <br />3. Throu�h �eoloQic mappina analyze geologic influences on river condition. <br />Discuss jeologic formations in the Rio Grande valley, geologic influences on the <br />current character of the valley, and specitic geoloaic controls on the channel. <br />Summarize ��•hich �eolovic factors can be addressed through enhancement <br />measures and which factors must be accepted as cor.straints to improvement of <br />river condition. <br />�. Utilizing channel slope information, bzdlu� d information, geolo�ical information, <br />location of siQnificant manmade featur�s on the river and all other pertinent <br />information, divide the study reacli into major reaches that exhibit substantial <br />homogeneity in these attributes. Further divide these major reaches into <br />subreaches based on the work discussed in Sections II. C. � and 6 below. <br />5. Through comparison of historical and cu-rrent maps and photographs and throu�h <br />comparison of river channel elevations over time estimate aQgradation or y <br />degradation of the river channel and changes to channel alignment for each reach. <br />6. Making full use of all other �vork performed as part of this Scope of Work, • <br />classify each reach and subreach of the Rio Grande frocn South Fork, Colorado to <br />the Alamosa-Conejos County line utilizin� methods developed by David Rosgen, <br />as described in his book Applied River Nlorpholo�y, or similar scientifically <br />accepted classification methuds, subject to the provision that any such alternative <br />methods must be approved by the client and Colorado Water Conservation <br />personnel before they are used. <br />7. To the e:ctent practical, display the major river reaches and the subreaches <br />determined for Section II. C. 4 and displa;r other river classification data on <br />project GIS maps, as described in Section II. A. <br />III. EYamine Specific River Issues <br />A. Identify Areas of Unsatisfactory River Condition (Unstable River <br />Reaches) <br />Apply the methodolojy described in Section II to the Rio Grande and identify areas of <br />unsatisfactory river condition (unstable river reaches) on project GIS maps, as described <br />in Seetion II. A, and throu�h �vritten descriptions of each area. Descriptions of areas of <br />unsatisfactory river condition shall include dimensions, exact characteristics, rate of <br />change, factors contributin� to instability, relevant physical, hydrologic, geomorphic, <br />s;ope or structural characteristics, �nd such other facts and fiaures as mav be necessarv to <br />locate and reco�nize the area. � <br />