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
(or "floating point underflow", "floating underflow", after "overflow") A condition that can occur when the result of a floating-point operation would be smaller in magnitude (closer to zero, either positive or negative) than the smallest quantity representable. Underflow is actually (negative) overflow of the exponent of the floating point quantity. For example, an eight-bit twos complement exponent can represent multipliers of 2^-128 to 2^127. A result less than 2^-128 would cause underflow.
Depending on the processor, the programming language and the run-time system, underflow may set a status bit, raise an exception or generate a hardware interrupt or some combination of these effects. Alternatively, it may just be ignored and zero substituted for the unrepresentable value, though this might lead to a later divide by zero error which cannot be so easily ignored.