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Summary Carroll et al. (2009) state that the United States Geological Survey (USGS) Death Valley Regional Flow System (DVRFS) model, which is based on MODFLOW, is “conceptually inaccurate in that it models an unconfined aquifer as a confined system and does not simulate unconfined drawdown in transient pumping simulations.” Carroll et al. (2009) claim that “more realistic estimates of water availability” can be produced by a SURFACT-based model of the DVRFS that simulates unconfined groundwater flow and limits withdrawals from wells to avoid excessive drawdown. Differences in results from the original MODFLOW-based model and the SURFACT-based model stem primarily from application by Carroll et al. (2009) of head...
Categories: Publication;
Types: Citation;
Tags: Death Valley,
Groundwater,
Hydrogeology,
MODFLOW,
nume
Aim A small fauna of amphibious snails (genus Assiminea Fleming, 1828) living in association with highly mineralized springs in the Death Valley?lower Colorado River region (DVLCR) is thought to be a relict of the Bouse Embayment, a putative late Miocene?early Pliocene transgression of the ancestral Gulf of California along the lower Colorado River valley. We analysed the phylogenetic relationships of this fauna using mtDNA sequence data (1171 bp) to determine whether, as would be consistent with this hypothesis, it forms a substantially divergent unit sister to marine coastal congeners. Location South-western Great Basin and lower Colorado River region, USA. Methods Two genes [mitochondrial cytochrome c oxidase...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Assimineidae,
Bouse Embayment hypothesis,
Colorado River,
Death Valley,
Gastropoda,
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