It is filled to the brim with sand, however, and through the sand is an underflow.
From the area of water-bearing gravels found, it was proposed to tap the underflow water at the 630-m.
The general scheme for tapping this underflow was to drive a main gallery at the 560-m.
The water is almost wholly taken from the rivers, but underflow is also utilized, especially in San Luis Park.
Here the waters lost themselves for many feet in the underflow so common in this land of aimless, uncertain waterways.
Old English flowan "to flow, stream, issue; become liquid, melt; abound, overflow" (class VII strong verb; past tense fleow, past participle flowen), from Proto-Germanic *flo- (cf. Middle Dutch vloyen, Dutch vloeien "to flow," Old Norse floa "to deluge," Old High German flouwen "to rinse, wash"), probably from PIE *pleu- "flow, float" (see pluvial). The weak form predominated from 14c., but strong past participle flown is occasionally attested through 18c. Related: Flowed; flowing.
mid-15c., "action of flowing," from flow (v.). Meaning "amount that flows" is from 1807. Flow chart attested from 1920.
v. flowed, flow·ing, flows
To move or run smoothly with unbroken continuity.
To circulate, as the blood in the body.
The smooth motion characteristic of fluids.
The volume of fluid or gas passing a given point per unit of time.
To menstruate: am flowing, so can't do inverted poses