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Conveyance Loss Modeling of Two Wyoming Rivers

Nickolas J. Lewallen and Victor R. Hasfurther

May 1994 WWRC-94-05

Technical Report

Submitted to

Wyoming Water Resources Center
University of Wyoming
Laramie, Wyoming

Submitted by

Nickolas J. Lewallen
Victor R. Hasfurther
Department of Civil & Architectural
University of Wyoming
Laramie, Wyoming

May 1994

Contents of this publication have been reviewed only for editorial and grammatical correctness, not for technical accuracy. The material presented herein resulted from research sponsored by the Wyoming Water Resources Center, however views presented reflect neither a consensus of opinion nor the views and policies of the Wyoming Water Resources Center, or the University of Wyoming. Explicit findings and implicit interpretations of this document are the sole responsibility of the author(s).


Conveyance loss modeling was performed on the Greybull River and the Wind River in Wyoming using the USGS hydrologic computer model J349. The conveyance losses determined by the model present values which water regulators can use to more accurately assess downstream water users their proportionate share of the conveyance loss encountered by reservoir releases. A method is presented which estimates incremental conveyance losses for difference incremental flows on the Greybull River.

The model was found to most accurately simulate conveyance losses where flows in the river do not change more than 300 cfs during any given time simulation period and the total flow is in the range of 300 to 600 cfs. It was also found that the model is sensitive to transmissivity and storativity in determining conveyance losses which means that accurate field data is needed in calibration of this type of model.

Chapter I - Introduction
Chapter II - Review of Literature
Chapter III - Study Areas
Chapter IV - Methodology
Chapter V - Results and Discussion
Chapter VI - Conclusions and Recommendations
Appendix A - Greybull River Output File Example
Appendix B - Greybull River Data Format

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