No available water
should be allowed to flow away unused.
Available surface water
The sources of water for dry-farms fall readily into classes:
surface waters and subterranean waters. The surface waters, wherever
they may be obtained, are generally the most profitable. The
simplest method of obtaining water in an irrigated region is from
some irrigation canal. In certain districts of the intermountain
region where the dry farms lie above the irrigation canals and the
irrigated lands below, it is comparatively easy for the farmers to
secure a small but sufficient amount of water from the canal by the
use of some pumping device that will force the water through the
pipes to the homestead. The dry-farm area that may be so supplied by
irrigation canals is, however, very limited and is not to be
considered seriously in connection with the problem.
A much more important method, especially in the mountainous
districts, is the utilization of the springs that occur in great
numbers over the whole dry-farm territory. Sometimes these springs
are very small indeed, and often, after development by tunneling
into the side of the hill, yield only a trifling flow.
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