drying up the lake

alkali arid aridization body bog change climate climatic desiccation dirt drought dry drying ecological ephemeral exsiccation fen flat grime impounded intermittent lake lakes marsh marshland mire modification morass muck mud muddy ooze oozy quagmire reversal river silt slikke slough sludge spell spruit stream swamp temporary turnover warpland water weather wetland