9493

• UCREFRP Catalog Number: 9493
• Author: Gaeuman, D., P. R. Wilcock and J. C. Schmidt.
• Title: High Flow Requirements for Channel and Habitat Maintenance of the Lower Duchesne River between Randlett and Ouray, Utah.
• USFW Year: 2003.
• USFW - Doc Type: \
• Copyright Material: NO

FINAL REPORT, November 2003
High-jlow Requirements for the Duchesne River

TABLE OF CONTENTS

LIS T 0 F TABLES ........................... ............................................................................................ V

LIS T OF FIGURE S ......................... .......................................................................................... vi

EXE CUTIVE SUMMARY.... ....... ............................... ......... .......... ... ........................... ............................... ix

INTR 0 D U CTI ON............ ......... ... ........ .... ................ ....... ............. ............ .... ....................__............ 1

High Flows for Channel and Habitat Maintenance........................................................... 1
The Necessity for an Historical Perspective ....................................................................... 3
D ESCRIPTI 0 N OF THE STUDY AREA ................................................................................ 5

ME THO D S ........ ........................................................................................................................ 10

Hy dro logy ............................................ ............ ....... ............. ................... ...................... ....... 10

S usp en ded - Sediment Tran spo rt ....................... ~ ....... ......................... ................................ 11

Geo m 0 rp hie Mapping........................................... ............. ................ ... ...................... .... .... 13

Creation and Analysis of GIS Databases ......................~...................................................14

Digitizing................................................................. .......................... ............................. 14

Analysis of Geographic Data '.' ............................................ ........ ................................... 15

Channel Width................................. ................................................... ............................ 15

Areas of Erosion and Deposition .................................................................................... 18

Development of a Gravel Budget.......................................................................................21

Uncertainty in Gravel Erosion and Deposition Volumes ...............................................22
Uncertainty in Estimated Changes in Gravel Storage..................................................... 23

Hydraulic Mo deling .......................... ................ ....... ........... ................... .......................... ... 24

Data Acquisition............................................... ..... .............................. ........................... 24

Model Calibration.............................................................................. ..................... ........ 27

Sedim e n t Sampling ................................................. ....... ....................... ........................ ...... 28

Estimation of the Discharge Necessary for Gravel Entrainment ................................... 29

Sub strate Map pin g.............................. ................... ................................. ............................ 30

Den droc hro no logy................................................... .............................. ........................ ...... 30

RE S UL T S ............... ....... .... ....... ....... .... ............... .......................... ......... ...... ........................... .... 44

Hydrology of the Duchesne River in the Study Area....................................................... 44
Delivery of Fine Sediment into the Study Area................................................................ 46

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