Abstract
Following are data on watersheds and fields with supplementary plots and lysimeters for surface‐runoff, operated by the Soil Conservation Service through its Division of Research or as designated in cooperation with the United States Geological Survey. Tables 1 to 10 show that hydrologic research is being conducted on surface‐areas covering a wide range. The size of the areas varies from approximately 700 square miles to a few square feet in area for lysimeters.Conservation Experiment Stations Division—This Division is making surface‐runoff measurements on 27 experimental farms distributed in 20 States and on which are made measurements of hydrologic factors as follows: (1) On about 50 small watersheds or fields from 3/4 to 68 acres; (2) on about 170 terraces from approximately 0.05 to seven acres; (3) on about 560 plots ranging in size from 0.005 to two acres.
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