[1] A new approach has been developed for solving solute transport problems in randomly heterogeneous media using the Karhunen-Loève-based moment equation (KLME) technique proposed by Zhang and Lu (2004). The KLME approach combines the Karhunen-Loève decomposition of the underlying random conductivity field and the perturbative and polynomial expansions of dependent variables including the hydr...

When water from the surface, e.g. from a lake, fl ows down through porous carbonate rocks, through a region with high hydraulic conductivity and encounters the water table of a phreatic aquifer, both waters mix by diffusion along their boundary. In a carbonate aquifer, where both surface and phreatic waters are saturated with respect to calcite, mixing corrosion causes renewed dissolution capac...

Disposal facilities for radioactive wastes comprise a series of engineered and natural (geologic) barriers to contain the radionuclides until their radiation hazard has decreased to acceptable levels. It is required that the long-term functionality of the containment barriers be evaluated by a quantitative risk analysis, also termed performance assessment. This entails the implementation of a P...

Public-supply wells with long screens in alluvial aquifers can produce waters of differing quality from different depths. Seasonal changes in quality are linked to seasonal changes in pumping rates that influence the distribution of flow into the well screens under pumping conditions and the magnitude and direction of intraborehole flow within the wells under ambient conditions. Groundwater flo...

Groundwater is one of the most important water resources in Iraq, so efficient management storage, recharge, and consumption rates required, for maintaining sustainability groundwater supplies. Some valuable methods ensuring long-term aquifers are those that provide artificial recharge. This study was conducted to determine effect recharge on levels quality Iraq’s Dibdibba unconfined aquifer, u...