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Water Supply for Mountain Camp

Possible water channel sections. Water supply project for mountain cabin. WATER SUPPLY FOR MOUNTAIN CAMP
For another simple example, let us estimate how we would bring water from a running stream into a tank (let's say a 50-gallon gravity tank) to supply water for a vacation cabin in the woods. A natural supply point is 100 ft away upstream, guaranteeing among other things a clean, continuous water supply.  Our problem is transport.  Shall we use pipe, an open rock-lined channel in the ground, or a wooden flume or trough?  See Figure 7.4. As we think about this, we discard the open channel in the ground as too easily contaminated.  The pipe could be laid on the ground; and the wood flumes could be suspended from tree trunks and possibly covered as shown by the dashed "board" in the illustration,. Thus, we have two reasonable ways of doing this job; the questions now concern cost and convenience.
Next we check the sizes needed. If we wanted the 50-gal. tank filled in 15 min, we would need a flow of about 4 gal/min. This is a stream of water about as big as a person's finger when the water is flowing two feet per second, as shown by the equation in the footnotet deriving the cross-sectional area. A, of the stream. This area would require a pipe one inch in diameter.   If we were using the wood "vee" channels, we would need two boards each about three inches wide to avoid splashing over, or one-half board-foot per running foot of channel (per foot of channel length). (A board-foot is one square foot of wood, one inch or less thick.)