Abstract
Methods of the compilation and manipulation of statistical surfaces are described in the production of summary maps of water availability. Isopleth maps of water supply (hydrographic potential) and water consumption are compared through the superimposition of their statistical surfaces. A derivative statistical surface is then created which, depending upon the method of transformation employed, depicts either the magnitude of “free” (unused) water resources or the relative completeness (extent) of their utilization. Translated from: Vestnik Moskovskogo Universiteta, geografiya, 1988, No. 2, pp. 64-68 by Natalia B. Barbash, Brooklyn, New York, 11209.
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