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Observed and Calculated Distribution of Lindane in Soil Columns as Influenced by Water Movement¹

ABSTRACT

Observed and calculated distributions of lindane in soil columns of infiltration experiments were compared. Three mineral soils with different organic matter contents and particle size distributions were used in the study. The adsorption coefficient (K') and rate of adsorption () were determined in independent experiments. As predicted by the theory, application of a greater amount of lindane to the soil surface increased the concentration of lindane but did not influence the depth of penetration. Under leaching conditions, the depth of water penetration divided by K was a good estimate of the observed depth of maximum concentration of lindane. The theory failed in general to predict the shape of the distribution curve of lindane.

¹ Contribution of the Department of Soil Science & Agricultural Engineering, University of California, Riverside 92502. The research leading to this report was supported by USDA Cooperative Agreement no. 10-14-100-10433(41) and by the Office of Water Resources Research, USDI, under the Matching Funds program of Public Law 88-379, as amended, and by the University of California, Water Resources Center. It is a part of Office of Water Resources Research Projects no. B-072-CAL and B-141-CAL (Water Resources Center Projects W-206 and W-332).

² Research Assistant, Professor of Soil Physics, and Assistant Professor of Soil Science, respectively, University of California, Riverside.

Received for publication February 16, 1972. Accepted for publication April 12, 1972.