2014 Las Vegas Wash Time-of-Travel Study
How has the morphometry of Las Vegas Wash (NV) changed since Reclamation carried out studies during the 1980s?
Need and Benefit
The Wash was formerly an ephemeral stream prior to its use as a wastewater outlet. It now carries approximately 200 million gallons of water per day into Lake Mead. Reclamation has performed extensive studies over 30 years documentating the impact the Wash has on the water quality and limnology of Lake Mead. Since 2000, a Capital Improvements Plan was initiated to construct erosion control structures (weirs) on the Wash between the three upstream wastewater treatment plants and Lake Las Vegas. Construction is on-going with the last weirs expected to be completed in 2017. As a result, the morphometry of the Wash is expected to have changed significantly.
In 2012, Janet Kirsch (LC Regional Office) proposed a Research Jam idea of doing another time-of-travel dye tracing study on the Wash. The objective of this study is to determine the change in the time-of-travel in the Wash based on the techniques used in the previous studies using a plug of Rhodamine WT as a tracer dye. This task is being planned to take place during November, 2014, which is during the same time frame previous dye studies were performed.
Information from this work will support of a number of other related Reclamation projects including water quality, demonstration wetlands, groundwater discharge modeling, and erosion control.
Contact the Principal Investigator for information about partners.
Bureau of Reclamation Review
The following documents were reviewed by experts in fields relating to this project's study and findings. The results were determined to be achieved using valid means.
Las Vegas Time of Travel Study (final, PDF, 2.1MB)
By Becky Blasius
Publication completed on September 30, 2016