Accession Number : AD0266676

Title :   THE CLIMATIC AND HYDROLOGIC FACTORS AFFECTING THE REDISTRIBUTION OF SR-90

Corporate Author : THORNTHWAITE (C W) ASSOCIATES ELMER N J LAB OF CLIMATOLOGY

Personal Author(s) : MATHER,J.R. ; NAKAMURA,J.K. ; THORNTHWAITE,C.W.

Report Date : SEP 1961

Pagination or Media Count : 1

Abstract : The study of the influence of climatic and hydrologic factors on the movement of strontium through the upper layers of the soil produced a number of results: strontium which fell from the atmosphere was found to move through the upper part of the soil profile at a rate determined by the volume of leaching solution present and the chemical and cation exchange properties of the soil solution; a mathematical model of movement was established; the volume of the leaching solution is the climatic water surplus or the excess precipitation when the water holding capacity of the soil is filled; a manual for using high speed computers to compute the factors of the daily water balance was prepared; the influence of the soil solution in determining the rate of movement of strontium can be expressed in terms of the factor, leaching efficiency; leaching efficiency varies geographically from high values in moist regions to low values in dry regions for soils of the same texture; leaching efficiency is related to the moisture index; and from the data on volume of the leaching solution and the leaching efficiency, it is possible to determine the rate of redistribution of strontium in the upper layers of the soil at a large number of stations and to plot the results on maps for analysis. (Author)

Descriptors :   *RADIOACTIVE ISOTOPES, *SOILS, *STRONTIUM, ABSORPTION, HYDROLOGY, MATHEMATICAL ANALYSIS, FALLOUT, SURFACE PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE