Many endangered or threatened ecosystems depend on ground water for their survival. Nebraska's saline wetlands, home to a number of endangered species, are ecosystems whose development, sustenance, and survival depend on saline ground water discharge at the surface. This study demonstrates that the saline conditions present within the eastern Nebraska saline wetlands result from the upwelling o...

Carbon dioxide (CO2) sequestration is considered to be one of the most effective technologies mitigating greenhouse gas emissions. In this technology, single phase supercritical CO2 injected into an underground geological formation such as a deep saline aquifer. Existing projects demonstrate that successful implementations are possible; however, significant uncertainties associated with risks l...

Abstract An integrated hydrochemical and geophysical study of the saline paleo-water uprising into alluvial aquifer Oltrepò Pavese plain sector (Po Plain, northern Italy) is presented. This involved analysis groundwater, assessment well logs, one-, two- three-dimensional electrical surveys. The studied area was selected for its characteristic hydrogeological setting. strongly conditioned by pre...

The purpose of this study was to elucidate the processes controlling the distribution and behavior of the longerlived Ra isotopes in continuous Paleozoic carbonate aquifers of parts of Missouri, Kansas, and Oklahoma. Activities of (Ra) and (Ra) were analyzed in fresh and saline ground waters, brines, and rocks. The ̄uids have a wide salinity range (200±250,000 mg lÿ1 total dissolved solids). Th...

Saline aquifer geological carbon sequestration (SAGCS) is considered most attractive among other options for geological carbon sequestration (GCS) due to its huge sequestration capacity. However, in order to fully exploit its potential, efficient injection strategies need to be investigated for enhancing the storage efficiency and safety along with economic feasibility. In our previous work, we...

Saline water intrusion into freshwater aquifers is a major geohydraulic problem relevant to coastal environment. Apart from contaminating the fresh groundwater resources, saltwater alters geotechnical properties of aquifer materials, affecting resource planning and management. The present study focuses on an in-depth laboratory investigation influence submergence sand. fine sand sample was subm...

An extensive saline plume (>250 km) within the regionally important uncon®ned aquifer in the Neogene Ogallala Formation overlies the Panhandle oil and gas ®eld in the Southern High Plains, Texas, USA. Relative to upgradient Ogallala water, the plume waters have dO (ÿ6.7 to ÿ8.8-) and dD (ÿ42 to ÿ88-) values that tend to be depleted and have higher Cl (>150 mg/l) and SO4 (>75 mg/l) concentration...

Uranium (U) concentration and the activities of 238U, 234U, and 230Th were determined for groundwaters, spring waters, and lake water collected from the Shihongtan sandstone-hosted U ore district and in the surrounding area, NW China. The results show that the groundwaters from the oxidizing aquifer with high dissolved oxygen concentration (O2) and oxidation-reduction potential (Eh) are enriche...

This paper describes a study of groundwater flow in a coastal Miliolite limestone aquifer in western India. An examination of field information suggested that the transmissivity of the aquifer varies significantly between high and low groundwater heads. Pumping tests indicate that this is due to the development of major fissures in the upper part of the aquifer. A regional groundwater model wit...