The formation water in the floor recharges the coalbed through the aquitard
in the manner of vertical seepage and then the inter-layer leakage occurs; 5).
sequester dangerous wastes of modern technological
The Middle Aquifer is separated flora the Upper Aquifer by a lacustrine clay-silt unit, herein referred to as the upper aquitard
have very slow permeability whereas aquicludes are essentially impermeable.
The designation of a stratum as an aquifer or aquitard
is relative to its neighboring strata.
The direct seepage of groundwater in the sea was about 50% and the flow up into the overlying aquitard
was 30% of the total discharge.
Ground water tends to flow through aquifers constrained by layers of less-permeable rock called aquitards
The main aquitard
among the aquifers are composed of alluvial mudstone.
(confining layer) was discovered at site 2 approximately 5 m below the surface.
In this way, the water is subartesian, whereas the lower part of morainic loam (Q2) is an obvious aquitard
The Second Canadian Symposium on Aquitard
Hydrogeology was held this past June at the University of Ottawa, Ontario, and brought together over 120 geoscientists from Hong Kong to Bern and from Mississippi to Saskatoon.
(Chapter 13)--A relatively imperious layer in soil that retards water movement.
Weaver TR, Cherry JA, Frape SK (1996) Hydrodynamic response of a clay-till aquitard
to changing potentiometric conditions in an underlying water-supply aquifer: implications for solute and contaminant transport.
Belqa Group was firstly named by Quennell (1951) and was divided into five formations of predominantly limestones and chalks showing partly high amounts of chert and phosphate; Wadi Umm Ghudran Formation which is considered as an aquitard
, it is composed of white chalk, chert, and microcrystalline limestone concretions with phosphatic chert, with an average thickness of about 20 m (Mc Donalds, 1965).
In places, erosional processes in pre-Quaternary time, during interglacial and in late- and postglacial times have formed erosional valleys, cutting through the Lontova aquitard
(Tavast 1997; Vaher et al.