LOCATION AND MOVEMENTS OF UNDERGROUND WATERS 53 



Movements and Depth of Deep Seated Waters. - - The deep 

 seated waters, or those reached by the deep drilled wells, do not 

 follow the simple laws governing the movements of the ground 

 waters. Although moving from higher to lower points and in 

 the general direction of the broader surface slopes, they are usually 

 independent of local topography and of irregularities in the im- 

 mediately overlying water-table. They are commonly confined 

 under pressure in channels, joints or other passages in the denser 

 rocks, or in porous beds between impervious strata, and have 

 often been transmitted through the rock from distant sources. 



The depth at which the water will be encountered depends 

 upon the slope or dip of the bed or passage in which it occurs. 

 Other things being equal, the depth will be least beneath the val- 

 leys and greatest beneath the uplands. If the slope of the con- 

 fining bed is uniform, the depth will decrease in the direction of 

 the outcrop, providing the surface does not rise more rapidly than 

 the water-bearing bed. 



