The effects of weathering and decompaction on the Opalinus Clay in northern Switzerland were studied basis a 146 m long drillcore profile. Below 6 Quaternary sediments, rock down to 16 depth is affected by partial or complete dissolution siderite, calcite, pyrite organic matter, with goethite as only identified product. reduction level Fe (Fe2+/Fetot) increases from <20% >80% unweathered below ...

In this paper, a modeling tool for risk assessment analysis of the movement of hydrocarbon contaminants in the vadose zone and mass flux of contamination release into the groundwater table was developed. Also, advection-diffusion-reaction equations in combination with a three-phase equilibrium state between trapped air, soil humidity, and solid particles of unsaturated soil matrix were numerica...

Detailed site characterization data from the former electroplating shop at the U.S. Coast Guard Air Support Center, Elizabeth City, North Carolina, suggested that the elevated Cr(VI) in the capillary fringe area had contaminated the ground water at the site. Most of the mobile Cr(VI) is present in the capillary fringe zone of the aquifer under an oxidizing environment. Current literature sugges...

A sample of 200 web tables was interactively converted into layout-independent Augmented Wang Notation (AWN) using the Table Abstraction Tool (TAT). The resulting XML ground-truth files list for each table (1) cell contents, (2) relationships between the hierarchical column and row headers and the value/content/data cells, (3) designators for aggregates like totals and averages, and (4) ancilla...

successful application of a tbm in a project requires investigating both the ground conditions and the machine and backup system design features. prediction of the machine performance is very important as it has a big effect on the duration of the project and the costs. in this respect, both penetration rate and advance rate must be estimated. utilization factor, which depends on the type of op...

the effect of drought indices on hydrostatic variations and qualitative parameters of the zahedan plain&apos;s aquifer was investigated. for this purpose, 12-year statistics from observational and piezometry wells in the plain, the drought index of percentage normal )pn), standardized precipitation index )spi(, and 30-year precipitation statistics of zahedan station were used. results revealed ...

The Green Revolution in India has achieved self-sufficiency in food production. However, in the state of Haryana this has resulted in continuous environmental degradation, particularly of soil, vegetation and water resources. Soil organic matter levels are declining and the use of chemical inputs is intensifying. Newly introduced crop varieties have been responsive to inputs but this has necess...

Operational multi-channel algorithms for deriving sea surface temperature (SST) from satellite data are derived using theoretical models of infrared radiation transfer through the atmosphere or by regression of satellite data with ground-based observations. In both cases the algorithm derivation implies a “first-guess” of the water vapour content along the atmospheric path between the satellite...