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Showing 1 to 20 of 22 for “"Lake Mead"”.
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Polonium-210 radioactivity in Lake Mead fish
… its generality by analyzing various fish from Lake Mead. Studies of polonium are useful because the man-made radioactive plutonium is also a heavy metal with very similar energy of alpha particle emission during radioactive decay; This study was directed toward determining the radioactivity …
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Kytoon observations of the Lake Mead boundary layer
… of kytoon sampling of the boundary layer at Lake Mead was done through a cooperative effort among the U.S. Geological Survey, National Oceanic Atmospheric Administration, and U.S. Bureau of Reclamation. Micrometeorological data (MET) were analyzed to find boundary layer characteristics of …
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Measurement of lignin and organic carbon in Lake Mead sediment
… of the contribution of terrestrial runoff to lake sediments because lignin is exclusively a product of land plants. The S/V ratio is a powerful tool to trace the terrestrial origin of organic matter in sediment; Two chemolysis methods (on-line and off-line) were examined and compared. Organic …
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Stratigraphic evolution of Las Vegas Bay, Lake Mead, Nevada: 1935--2002
Las Vegas Bay in Lake Mead, NV provides a unique mid-scale natural laboratory to study the effects changes in lake level, sediment supply, fluvial discharge and basin physiography have had on stratigraphy of the basin. Mapping, seismic, sidescan sonar and bathymetry surveys, in conjunction with …
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Transport of perchlorate in the Las Vegas Wash and Lake Mead
… fate of perchlorate in the Las Vegas Wash and Lake Mead resulting from the long-term contamination by the manufacturing of rocket fuels in Henderson, Nevada. The changes in perchlorate concentrations for the Las Vegas Wash and Lake Mead were investigated for the last 10 years by analyzing …
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Enhancement and monitoring of the Procambarus clarkii population in Lake Mead
… are found in extremely low numbers throughout Lake Mead, AZ-NV. The crayfish are an important dietary component for game fish. Enhancement of the crayfish population would broaden the fishery forage base. Crayfish were stocked and monitored in a study cove on Saddle Island to determine if the …
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Algal growth potential and nutrient limitation in the Las Vegas Bay, Lake Mead, Nevada
… nutrient limitation of the Las Vegas (LV) Bay of Lake Mead using the standard test organism Selenastrum capricornutum and the Lake phytoplankton. Results for the current nutrient levels in the LV Bay revealed that the AGP of the LV Bay waters, measured by the maximum specific growth rates is …
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A method for determining elements for elemental signature analysis of groundwater and treated Lake Mead water
… coupled plasma mass spectrometry (ICP-MS); Lake Mead is the primary water supply for the Las Vegas Valley. During the summer months, several large underground aquifers are used to supplement the Lake Mead water supply. Treated Lake Mead water is recharged during the low demand months to …
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Temporal and spatial patterns of abundance of age 0 threadfin shad (Dorosoma petenense) in Overton Arm, Lake Mead
… abundance and growth, in the Overton Arm of Lake Mead, were examined to evaluate the effects of resource availability on the young fish. This was part of the Lake Mead Fertilization Project, designed to assess feasability of increasing survivorship of juvenile shad by boosting phosphate, …
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The Muddy Creek Formation: Depositional environment, provenance, and tectonic significance in the western Lake Mead area, Nevada and Arizona
… the Boulder Basin conglomerate, the lakeshore member, and The Cliffs member; Clasts in the Muddy Creek Formation are composed of andesite, dacite, basalt, rhyolite, quartz monzonite, and granite. Paleocurrent data for the basal River Mountain conglomerate suggest that the transport …
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Stratigraphy And Depositional Environments Of Lower And Middle Cambrian Strata In The Lake Mead Region, Southern Nevada And Northwestern Arizona
The stratigraphy and depositional systems revealed within the Lower to Middle Cambrian Tapeats Sandstone-Pioche Shale-Lyndon Limestone-Chisholm Shale succession were studied between the easternmost limit of Cretaceous overthrusting in southern Nevada and the western edge of the Colorado Plateau in …
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Observing Drought-Induced Crustal Loading Deformation Around Lake Mead Region via GNSS and InSAR: A Comparison With Elastic Loading Models
Lake Mead, the largest reservoir in the United States along the Colorado River on the border between the states of Nevada and Arizona, is one of the nation's most important sources of freshwater. As reported by the U.S. drought monitor (USDM), the entire region has been experiencing recurring …
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Drinking Water Infrastructure Assessment with Teleconnection Signals, Satellite Data Fusion and Mining
… for the largest reservoir in the United States, Lake Mead, which is located in the proximity of a big metropolitan region - Las Vegas, Nevada. The water quality in Lake Mead is impaired by forest fires, soil erosion, and land use changes in nearby watersheds and wastewater effluents from the Las …
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Gas chromatographic-electron capture analysis of disinfection byproducts from the chlorination of swimming pools and lake water
… Water District of Southern California, lake water from the Overton Arm of Lake Mead was sampled, chlorinated, extracted, and analyzed by a gas chromatograph equipped with an electron capture detector; Analysis of the data showed that the Boulder Basin of Lake Mead produced the highest …
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Accuracy investigations of Parshall flumes and propeller meters
… are essential to earn return flow credits from Lake Mead; After reviewing existing plant flow data, nine experiments were conducted at the plant to determine which flow measurement devices might be suspected of not measuring flow correctly. Evaluations were made of influent flow accuracy at each …
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Style of volcanism and extensional tectonics in the eastern Basin and Range Province: Northern Mohave County, Arizona
The west-dipping Cyclopic-Salt Spring Wash-Lakeside Mine fault system marks the easternmost boundary of the extensional allochthon in the Basin and Range Province and the eastern limit of exposure of mid-Tertiary igneous rocks at the latitude of Lake Mead. The upper plate of this fault system is …
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What's swimming in my glass? The debate over the Southern Nevada Water Authority's use of the return flow credit policy
… of return flow credits to divert water from Lake Mead above the annual allocation authorized by the Colorado River System Water Use Agreement. Credits obtained by the return of treated effluent allow water officials to divert as much Colorado River water as is needed to sustain current growth …
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Depositional history of the Black Mountain conglomerate, Mohave County, Arizona: Sedimentary response to Miocene extension
… Colorado River extensional corridor to the Lake Mead area. Clastic sedimentary rocks in the basin are linked to the extension of the region; Documentation of the basin fill was conducted with the aim of determining whether sedimentary clasts can be tied to lithologies that are exposed along …
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A system model for source water assessment in the Las Vegas Valley
… for Las Vegas Valley surface water runoff into Lake Mead is important since it will guide future work on source water protection of the main source of water; Once the vulnerability of the intake was determined, a tool was developed to help with source water assessment, using the system dynamics …
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Interpreting site formation processes affecting re-emergent cultural sites within reservoirs: A case study of St. Thomas, Nevada
… the waters of the Colorado River to create Lake Mead reservoir in 1935; providing irrigation, hydroelectric power and flood control in the lower Colorado River basin.;This research identifies those processes governing and manipulating site formation and the stability of remaining structural …
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