Measurements of thermal-water discharge outside Lassen Volcanic National Park, CA 1983-94
USGS, Sorey ML, Colvard EM, Ingebritsen S. 1994. Measurements of thermal-water discharge outside Lassen Volcanic National Park, CA 1983-94. U.S. Geological Survey (USGS) Water Resources Investigations Report. 94-4180-B. Menlo Park, CA
Entire Abstract: "Thermal water derived from the hydrothermal system beneath Lassen Volcanic National Park, northern California, discharges by spring flow and ground-water seepage into streams draining the Lassen region. High concentrations of conservative constituents (chloride and boron) in the thermal water make it possible to determine the amount of thermal water in surface streams from measurement of chemical flux. Such measurements indicate that the total discharge of thermal water from the Lassen hydrothermal system is less than or equal to 46 L/s. Most (22 L/s) of this discharge occurs along Mill Creek in the vicinity Morgan and Growler Hot Springs, where repeated measurement have relative standard deviation 15 percent, and indicate some correlation between thermal-water discharge and stream flow. Additional outflow of Lassen thermal water occurs at Domingo Springs and in Mill Creek downstream from Highway 36, and possibly in the North Fork Feather River and the Pit River. Arsenic and antimony are also present in high concentrations in the Lassen thermal waters, but are not transported conservatively in the streams. Significant, but variable, losses of arsenic and antimony contributed by thermal water inputs occur within 1-4 km of the hot springs due to oxidation in the stream water and subsequent adsorption on streambed sediments."
- Type
- Published Report
- Authors
- USGS; Sorey, Michael; Colvard, Elizabeth; Ingebritsen, S.E.
- Date of Issue
- 1994
- Units
- HIST , LAVO , WRD
- Keywords
- Antimony, Arsenic, boron, Chemical, Chloride, Domingo Springs, ehistory, Feather River, Geothermal, Growler Hot Springs, History, Hot Springs, Hydrothermal, Mill Creek, Morgan Hot Springs, Pit River, thermal water, Water Quality