EXAMINATION OF THE FEASIBILITY OF DEVELOPING A RELATIVELY SIMPLE PREDICTABILITY MODEL FOR A VARIETY OF DISPERSION PROBLEMS IN AIR OR WATER IS PROPOSED.

EXAMINATION OF THE FEASIBILITY OF DEVELOPING A RELATIVELY SIMPLE PREDICTABILITY MODEL FOR A VARIETY OF DISPERSION PROBLEMS IN AIR OR WATER IS PROPOSED. WE BELIEVE THAT VALIDREPRESENTATIONS OF THE CONCENTRATION DISTRIBUTION IN BOTH PHYSICAL SPACE AND ENSEMBLE SPACE MAY BE ACHIEVED WITH SUFFICIENTLY FEW PARAMETERS TO PERMIT AN ATTRACTIVE ENGINEERING MODEL. PREDICTION OF THE PROBABILITY DISTRIBUTION FUNCTION AS WELL AS THE EXPECTED MEAN DISTRIBUTION SHOULD PERMIT SUCH A MODEL TO BE RIGOROUSLY VERIFIED AND APPLIED. AIR AND WATER QUALITY DECISIONS, PARTICULARLY THOSE INVOLVING EMERGENCY RESPONSE CAN THEN BE MADE BASED ON MUCH FIRMER STATISTICAL INFORMATION THAN IS POSSIBLE FROM ANY CURRENTLY AVAILABLE MODEL.