The USGS Nevada Water Science Center (NVWSC), in partnership with the National Park Service (NPS), is evaluating and monitoring the basic water quality and sediment chemistry of two proposed refugia and three established habitats for the endangered Mohave Tui Chub over the course of the year. NVWSC will also compare and evaluate findings to U.S. Environmental Protection Agency screening levels and...

Nevada Water Science Center

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July 17, 2018

Evaluating Potential Refugia for the Endangered Mohave Tui Chub

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November 25, 2024

Using citizen scientists to collect oxygen and hydrogen isotope data in southern Nevada

What is Citizen Science?Citizen science programs provide a means for Federal and non-Federal government agencies to make science more engaging, transparent, and accessible by partnering with the public for the purpose of problem solving, data collection, and monitoring. Public volunteers become directly involved in local research, thereby engaging in scientific projects. The public has already bee

Authors

Joshua M. Gonzales, Katherine J. Earp, Sade K. Cromratie Clemons

Water Resources Mission Area, Nevada Water Science Center

November 12, 2021

Water and sediment chemistry of selected existing and potential habitats of the Mohave tui chub, Mojave National Preserve, California, 2018

The Mohave tui chub (Siphateles bicolor mohavensis) was nearly extirpated from the Mojave River drainage in California by the mid-twentieth century and was listed as endangered in 1970. A source population of Mohave tui chub exists at MC Spring in Zzyzx, California, and has been used for several re-establishment efforts in previous decades. Two potential habitats in the Mojave National Preserve wi

Authors

Katherine J. Earp, Angela P. Paul

Water Resources Mission Area, Nevada Water Science Center

May 11, 2021

Evaporation from Lake Mead and Lake Mohave, Nevada and Arizona, 2010–2019

Evaporation-rate estimates at Lake Mead and Lake Mohave, Nevada and Arizona, were based on eddy covariance and available energy measurements from March 2010 through April 2019 at Lake Mead and May 2013 through April 2019 at Lake Mohave. The continuous data needed to compute monthly evaporation were collected from floating-platform and land-based measurement stations located at each reservoir. Coll

Authors

Katherine J. Earp, Michael T. Moreo

Water Resources Mission Area, Nevada Water Science Center

March 31, 2020

Hydrologic monitoring networks in the Death Valley Regional Flow System, Nye County, Nevada and Inyo County, California

IntroductionWater is an important resource in the arid southwest region of the United States where there is a limited supply of surface water and groundwater. In the Death Valley regional groundwater flow system (DVRFS) in southern Nevada and eastern California, groundwater is the main source of supply for agricultural, commercial, and domestic water needs.For over four decades, the United States

Authors

Steven R. Reiner, Peggy E. Elliott, Katherine J. Earp, Wayne R. Belcher

Water Resources Mission Area, Nevada Water Science Center