Containment of particulate wastes at open-water disposal sites.

In estuarine, lacustrine and coastal localities particulate silt-clay size waste released at the water surface is found to deposit on the bottom within a radius of c 200m from its impact point independent of water depth and the wolume of material released, but provided that the site is below wave-base. In marine localities the tidal stream will disperse waste placed in a deposit rising above natural topographic features of the bottom unless its surface is armored by erosion resistant material or the natural sedimentation rate exceeds a certain critical value. These factors are evaluated for dredged material disposal sites in Long Island sound. -from Authors