PREDICTION OF SUBSURFACE-DETONATION FALLOUT | WE = _ | | | [ | 2 — | ~ eel — — —_o_ —£ ooh = ef 7 SE = - FF oJ << — — — ~_| ++ + La — < 349 — ao a 8 10 a — — — 107? CALCULATED F - a re — 0 | 10 [ 20 | 30 | 40 | . 60 DISTANCE, NAUTICAL MILES Fig. 10-—~The calculated and the observed gamma dose rates at H+ J hr as a function of distance along the hot line of the pattern (predictive calcui :tion) from the Teapot ESS shot. PREDICTION OF FALLOUT FROM ROW-CHARGE SHOTS In principle, the fallout pattern from a row of subsurface nuclear detonations may be estimated with the crate::ng fallout model, provided the model input parameters are adequately known for 1row-charge events. In the current state of knowledge, the cloud-geometry input parameters and the value of F, appeartobe the most difficult to specify. Study of time-lapse photography of the main-cloud and the base-surge evolution from past high-explosive row-charge tests give significant experimental information on the cloud~geometry parameters. For example, empirical methods of predicting crosswind radius and height of the base surges originating from high-explosive row-charge shots have been studied.’ In this study it was shown that for five equal-weight charges, equally spaced and emplaced at the same depth of burial, the