The Water Supply of Oregon.
There never should be a scarcity of water in Oregon. It is full of rivers and streams and lakes. The streams draining the northern, eastern and western slopes of these mountains find their way to the sea through the Columbia: those of the southern slopes drain into lakes,from which the water escapes only by evaporation. These belong to what is known as the Great Basin drainage. In addition to the water supply represented by these streams, a large amount of water for both irrigation and domestic use can probably be obtained from artesian wells when settlement makes it necessary. An official investigation of the water supply is to be made; gauging stations are to be located on all the principal streams to determine their flow; a large number of rainfall stations will be established for the purpose of ascertaining the amount of precipitation in the various drainage-basins; and a study will be made of the relation between the precipitation and the run-off of the streams, whose flow varies as greatly from season to season, as does the rainfall. Projects to reclaim this area by irrigation, therefore, will involve the construction of reservoirs in which the flood-uters of the streams can be stored to make them available during the irrigating period. The question of impounding water for irrigation in large reservoirs immediately brings tip the question of evaporation, and stations, at which this phase of the subject will be studied, will be established on four or five of the principal lakes.