Hydraulic Conductivity Of Granite

To understand water flow processes through variously weathered bedrock we measured the saturated hydraulic conductivity ks and water retention characteristics of weakly to highly weathered tanakami granite and rokko granite core samples.

Hydraulic conductivity of granite.

If k is the same at all points the system is uniform or homogeneous. Sue the owner of joe s 24 hour gas has a shallow well 15 m deep as illustrated in the diagram. K measures hydraulic properties at a point not necessarily for a whole system. If not it is heterogeneous.

Homogeneous heterogeneous examples in natural systems. Sand with clay lenses connected fractures. Recent studies have emphasized the importance of bedrock in hydrologic processes occurring in headwater catchments. Hydraulic conductivity of selected consolidated and unconsolidated geologic materials from heath 1983.

Hydraulic conductivity symbolically represented as is a property of vascular plants soils and rocks that describes the ease with which a fluid usually water can move through pore spaces or fractures it depends on the intrinsic permeability of the material the degree of saturation and on the density and viscosity of the fluid. First the morphological information is determined using 3d. A number of empirical formulas some dating back over a century have been proposed which attempt to relate the hydraulic conductivity of an unconsolidated geologic material granular sediment or soil to its grain size distribution obtained from sieve analysis. Conductivity porosity in just this one outcrop.

The study sites in the foothills of the san jacinto mountains represent common regolith conditions in granitic terrain of. To derive values for k h in rocks made up of small pore passages or tubes poiseuille s law for flow through a capillary tube of radius r is invoked. R r p 8 1 q 2 2 f. Q f k h a p k h r 2 p where a is the cross sectional area normal to the flow direction and k h is the hydraulic conductivity.

Under an hydraulic gradient p is. Mudstone fractured granite limestone in a karst region sandstone and unfractured gneiss. Saturated hydraulic conductivity k sat describes water. The large scale hydraulic conductivity experiment at stripa sweden was an attempt to produce a macromeasurement of the average hydraulic conductivity of approximately 200 000 m 3 of low permeability fractured granite.

Groundwater seepage into a 33 m long 5 m dia drift was measured as the net moisture pickup of a ventilation system.