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<br />CONTENTS
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<br />Abstract...........,.... ....... ............. ......................, ...., ............... .....,.., ..............,....., .......... ...............,.... ...................,.. ..............., 1
<br />Introduction",..,....,...,."""",..,....,....""""....,.""..""""......,.."",.""",...... ,....""""",......""", ,. ,. ,......,......""......,....,.,.,.",...... 1
<br />Purpose and scope. ,. ,."".,.."""" ,.,. ,.,.""""",'.. ,. ,.,.,."",.."", ,. ,.,.,.,."",...., '. ,...,.,.,.",......,., ..,.,.,..""....,.,.,."..."",,'..,.,.,. 2
<br />Acknowledgments .,.,.",.."",.... ,.,.,.,"',....,........,.,.,"',....,......,.,.,."",....,....,.,.,.,."",..,......",."""",..,..."""".."""..,.""" 2
<br />Description of study area.,.",.. ,......,.,."""",..,.,....,...,.""", ,...,....,...,.,""',..,.,.,..",."""",..,...."".."",......,..""""....",..,.""""" 2
<br />Field measurements for verified roughness coefficients... ...................... ........................,.................... _,............,.................. 4
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<br />Site selection"""",......""."""",.. ,...,."""""".. ,. ,...,.""", ,.", ,... ,...,..""".. ,......,.,.,.."".. ,.,.,.".,.""", ,. ,.,.,.,..",.."""....,.... 4
<br />Data collection......,.,.""""".... ,...,.."""..",......,.,.."" ,.,.,.,....,.,.,.,.." ,...,.,.,....,..""", ...,.,.,"""""",..,.,.,.."""""",..,.,.."" 4
<br />Computation of reach properties and roughness coefficients ......................................................,.......................,..............., 5
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<br />Assumptions and limitations ....,..................,...........................................,................... .............,....",.....................,............. _ 7
<br />Changi ng boundary conditions......,....""""",....,...,.."" ,.",......,......"" ,. ,.,......,...."".. ,...,.,..,....""" ,...,.,.,.".,.""",..,.,." 7
<br />Changing vegetation conditions..................",.....................,.....................,............,......................................... .......... 7
<br />Uncertainties of discharge measurements.,...,..........,......,.............. ..................................................................,......... 8
<br />Flow depth and magnitude""""",.... ,.."'.."""",,.... ,.."""""",......,..""" ,."",......,..""".. ,.,....,.,..."", ,. ,. ,.,.,..,.,...."" ,. ,., 8
<br />Changing bed forms,.,."""""""..,.,.,."""""" ,...,.,.,.,.."....",.. ,.,.,.,.",......,.. ,...,.,.,.",......,.,..,.,.,."",....,.,.""".""",..,.,.,., 9
<br />Presentation of verified roughness coefficients.,......,.,."",.... ,.,....,.,.,.,.,"',....,....,.,.,.""",..,...."",.""",....,..."""""""....,."", 1 0
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<br />Hassayampa River near Arlington""".,....,.,.,."""",..,.,..,.,.,."""",..,.,..",.""""", ,.,.."""..",.. ,. ,.,.,."""",..", ,.,. ,."""", 11
<br />Skunk Creek above Interstate 17 ,....,.,..",.."""",.....,.."""""",..,...,.."",.,."",......,.."",...,..,.,......""",.,.,.,., ..,.,."""".,. 16
<br />Agua Fria River below New Waddell Dam ..........................................,.,..,....................................,.,.......,................. 23
<br />Cave Creek above Deer Valley Road"....,,'......,."""'....,....,.,...,.""'......,....,..."'"',..,.,..."".""",......,.,."""""""..,.."", 27
<br />Cave Creek below Cave Buttes Dam .............................,.............................,...................................................,..,..,.., 31
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<br />Hassayampa River near Morristown...............................................................................,.....................,......,............ . 35
<br />Indian Bend Wash above Curry Road."",""'......,.,.,."'...."'......,.,.,."'......,....,.,.,.",......,....,...""",....,.,.."",.,."",....,.." 40
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<br />Salt River above Interstate 10... ,.,."",......,......,...""", ,. ,. ,......,...""",....,.,..,..."""", ,.,.,..,'"""""",..,.,.."""""",....,."", 44
<br />Verde River below Beeline Highway ..,.,....,...."""" ,.,.,.".,.,.."""" ,...,."""..""".. ,.,.""",..", ,. ,. ,.,.,."""",..", ,. ,.,.."""" 48
<br />West Fork Sycamore Creek near Sunflower '"""".....""""""""..,.,.""",.."""...,.,.,"",'.."".,.,.,.,.."""",.,., ..,...,..""..,. 52
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<br />San Pedro River near Charleston. ,.,...""""""" ,. ,.,.,.""", '.", ,... ,.,.,.,..".... ,., ,. ,. ,.,.,.",....,.,.,..,.,.,..""" ,.,.,.,."".,.."" ,. ,.,.,. 55
<br />Santa Cruz River at Cortaro,........,...."" ,.",......,...""",.. ,.,......,.,.."" ,.....,.,..,.,.,..""" ,.,.,."".,..""".. ,.,.,.""""""" ,.,.,."" 59
<br />Verde River near Paulden ",.,.,.,.,..""" ,.,., ,.,.,.,.,.."",'..,..",.,.,.,.."",'..,.,..",.,."""",.."""",..",.... ,.,.""""",..", '...,."""" 63
<br />Salt River below Stewart Mountain Dam ,.,..""""....,....",.""",......,...."""""",....,..",",..,.,......,....""",.,.,.,..,.,..""",., 66
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<br />Discussion of significant results,.............. ...................... ......................,.....................,................. ...................,....,..............,. 69
<br />Components of Manning's n,....,.,.,.",......,......,...,.."" ,. ,. ,......,....."", ,...,.,.,..,...""", ,.,.,.,.."'..""""..,.,.,."""""""..,.,..,, 69
<br />Base value of Manning's n for gravel,bed streams ..........,.,..............................................,..................................,...., 69
<br />Influence of vegetation on Manning's n ..................................................................................,..............,.,..,.............. 74
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<br />Sununary and conclusion",..,.""...""",......,.."",..""""..,...""""""".... ,...,.."" ,. ,.",......,.,.." '. ,...,.,....,.,..""".. ,.,.,.,..,.,..""..,.,. 74
<br />Selected references""" ,. ,. ,.,.,.""""""....,...,.."""",......,..."", ,. ,. ,.,........,.,.", ,. ,. ,.,......,.,.,.." ,. ,.,.,."".,.""", ,.,.,.,.,..",..""",.,..." 75
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<br />FIGURES
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<br />L
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<br />Map showing study area and n-verification sites in Maricopa, Pima, Cochise,
<br />and Yavapai Counties, Arizona...................,..............,......,..............,...................,.....................,...................,.,..... 3
<br />Drawing showing open'channel flow reach in plan and profile views....................................,...............,............. 6
<br />Graph showing relation of stream power and median grain size to form of bed roughness ................................. 9
<br />Hassayampa River near Arlington:
<br />A. Graph showing cross-section 3 """",....,.,.,."",..",........,.""".,.,.,......,.,..",.,.,.,.,.,..,.,."""".,.,.,.,.".,..""..,.,.,. 12
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<br />B, Drawing showing plan view ....,."".,.,.,.,.,.."....,..,.,.,.,.,."",....,....,.,.,.,.,"',..,..."""..""""..,....."""""""..,.,." 12
<br />C Graph showing Manning's n and hydraulic radius ..................,.....................................,.............,............... 13
<br />D, Graph showing particle,size distribution for bed material......,..............,......................,.............,............... 13
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<br />2.
<br />3,
<br />4A~H.
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<br />Contents III
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