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The Impact of Twelve-Mile Canyon Mudslides on Downstream Water Users in Sanpete County, Utah

The objective of this study was to evaluate the impact of major landslides during 1983-84 in Twelve-Mile Canyon, Sanpete County, Utah on agricultural water users in the Gunnison Irrigation System. Sediment content and stream flow data were gathered from Twelve-Mile Creek during the irrigation season of 1984. This information was used to estimate the sediment load of Twelve-Mile Creek and to compare historical averages . A survey of Gunnison Irrigation System Water Users was conducted to obtain information defining the damage and production losses caused by an increase in sediment carried by irrigation water. This information was tabulated and used as a basis for calculating the cost of mudslides . Alternatives for mitigating the impacts of the landslides were explored and evaluated. Recommendations were presented to lessen the economic loss suffered by Gunnison Valley farmers. Damages were estimated to be over three million dollars annually. Construction of sediment basins and alteration in specific management prac tices offered the potential to reduce damage and loss by nearly one third.

Identiferoai:union.ndltd.org:UTAHS/oai:digitalcommons.usu.edu:etd-5083
Date01 May 1986
CreatorsBoore, Danny L.
PublisherDigitalCommons@USU
Source SetsUtah State University
Detected LanguageEnglish
Typetext
Formatapplication/pdf
SourceAll Graduate Theses and Dissertations
RightsCopyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact Andrew Wesolek (andrew.wesolek@usu.edu).

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