this one i know
Turbid (or turbidity) -- clarity of the water..
(ie, the normaly clear cool blue water of the tropical lagoon, was made turbid by the mud slides..
(forgetting the spelling of (lhora?)-- our geology thread word..)
Turbity is important-- it effects how deep sunlight can penitrate the water.. colder water, in general, is more turbid than warm water.(dark, opaque northern seas, clear, light tropical ones)