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Katherine Earp (Former Employee)

Science and Products

Morning Star Mine, Nev.

Evaluating Potential Refugia for the Endangered Mohave Tui Chub

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...
By
Nevada Water Science Center
Evaluating Potential Refugia for the Endangered Mohave Tui Chub

Evaluating Potential Refugia for the Endangered Mohave Tui Chub

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...
Learn More

Organic content and carbon dating of soil samples collected from a fen in Big Smoky Valley, Nye County, Nevada Organic content and carbon dating of soil samples collected from a fen in Big Smoky Valley, Nye County, Nevada

This U.S. Geological Survey data release consists of two comma-separated values (CSV) tables containing the results of organic content and radiocarbon dating analyses performed on soil samples collected from a fen in Big Smoky Valley, Nye County, Nevada. Samples were collected from a single soil boring referred to as F1-D on September 11, 2019, using a hand auger. A shapefile of the site...
By
Nevada Water Science Center

Geochemistry and Soils of the Big Smoky Valley Fens, Nevada Geochemistry and Soils of the Big Smoky Valley Fens, Nevada

Fens are groundwater-fed wetlands that can provide habitat for plants and animals. Due to anthropogenic activities and climate change, many fens around the world are at risk. This paper presents the results of a study of the hydrology and geochemistry of fens in Big Smoky Valley, central Nevada to support the Bureau of Land Management’s activities in the area. A water sample from the...
Authors
Sade K. Cromratie Clemons, Geoffrey John Moret, Katherine J. Earp
By
Nevada Water Science Center

Analysis of summer water temperatures of the lower Virgin River near Mesquite, Nevada, 2019–21 Analysis of summer water temperatures of the lower Virgin River near Mesquite, Nevada, 2019–21

The lower Virgin River is a sandy, shallow reach of the Virgin River that flows from northern Arizona to Lake Mead in Nevada. The Virgin River hosts several native fish species, including two endangered fish, woundfin (Plagopterus argentissimu) and Virgin River chub (Gila seminuda). All native fish species in the lower Virgin River have experienced reductions in population sizes in the...
Authors
Katherine J. Earp
By
Nevada Water Science Center

Using citizen scientists to collect oxygen and hydrogen isotope data in southern Nevada 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...
Authors
Joshua M. Gonzales, Katherine J. Earp, Sade K. Cromratie Clemons
By
Water Resources Mission Area, Nevada Water Science Center

Water and sediment chemistry of selected existing and potential habitats of the Mohave tui chub, Mojave National Preserve, California, 2018 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...
Authors
Katherine J. Earp, Angela P. Paul
By
Water Resources Mission Area, Nevada Water Science Center

Evaporation from Lake Mead and Lake Mohave, Nevada and Arizona, 2010–2019 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...
Authors
Katherine J. Earp, Michael T. Moreo
By
Water Resources Mission Area, Nevada Water Science Center

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

Introduction Water 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...
Authors
Steven R. Reiner, Peggy E. Elliott, Katherine J. Earp, Wayne R. Belcher
By
Water Resources Mission Area, Nevada Water Science Center

Science and Products

Morning Star Mine, Nev.

Evaluating Potential Refugia for the Endangered Mohave Tui Chub

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...
By
Nevada Water Science Center
Evaluating Potential Refugia for the Endangered Mohave Tui Chub

Evaluating Potential Refugia for the Endangered Mohave Tui Chub

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...
Learn More

Organic content and carbon dating of soil samples collected from a fen in Big Smoky Valley, Nye County, Nevada Organic content and carbon dating of soil samples collected from a fen in Big Smoky Valley, Nye County, Nevada

This U.S. Geological Survey data release consists of two comma-separated values (CSV) tables containing the results of organic content and radiocarbon dating analyses performed on soil samples collected from a fen in Big Smoky Valley, Nye County, Nevada. Samples were collected from a single soil boring referred to as F1-D on September 11, 2019, using a hand auger. A shapefile of the site...
By
Nevada Water Science Center

Geochemistry and Soils of the Big Smoky Valley Fens, Nevada Geochemistry and Soils of the Big Smoky Valley Fens, Nevada

Fens are groundwater-fed wetlands that can provide habitat for plants and animals. Due to anthropogenic activities and climate change, many fens around the world are at risk. This paper presents the results of a study of the hydrology and geochemistry of fens in Big Smoky Valley, central Nevada to support the Bureau of Land Management’s activities in the area. A water sample from the...
Authors
Sade K. Cromratie Clemons, Geoffrey John Moret, Katherine J. Earp
By
Nevada Water Science Center

Analysis of summer water temperatures of the lower Virgin River near Mesquite, Nevada, 2019–21 Analysis of summer water temperatures of the lower Virgin River near Mesquite, Nevada, 2019–21

The lower Virgin River is a sandy, shallow reach of the Virgin River that flows from northern Arizona to Lake Mead in Nevada. The Virgin River hosts several native fish species, including two endangered fish, woundfin (Plagopterus argentissimu) and Virgin River chub (Gila seminuda). All native fish species in the lower Virgin River have experienced reductions in population sizes in the...
Authors
Katherine J. Earp
By
Nevada Water Science Center

Using citizen scientists to collect oxygen and hydrogen isotope data in southern Nevada 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...
Authors
Joshua M. Gonzales, Katherine J. Earp, Sade K. Cromratie Clemons
By
Water Resources Mission Area, Nevada Water Science Center

Water and sediment chemistry of selected existing and potential habitats of the Mohave tui chub, Mojave National Preserve, California, 2018 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...
Authors
Katherine J. Earp, Angela P. Paul
By
Water Resources Mission Area, Nevada Water Science Center

Evaporation from Lake Mead and Lake Mohave, Nevada and Arizona, 2010–2019 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...
Authors
Katherine J. Earp, Michael T. Moreo
By
Water Resources Mission Area, Nevada Water Science Center

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

Introduction Water 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...
Authors
Steven R. Reiner, Peggy E. Elliott, Katherine J. Earp, Wayne R. Belcher
By
Water Resources Mission Area, Nevada Water Science Center
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