These conditions include : low flow; low water level; low nitrogen to phosphorus ratio; high water temperature; stable thermal stratification; increased retention time; high pH; high sulfate concentration; anoxia in at least some strata; high turbidity; high incident irradiation; and low macrophyte biomass
22.
:This report ( beware 2GB pdf ! ) gives some figures for thermal stratification at Dromana ( assuming that this is the right location ), with one example from December ( Figure A3.6 ) showing a decrease of nearly 1.5?from 19.5 to 18 at about 2m depth, I guess you might notice that . talk ) 17 : 32, 9 January 2010 ( UTC)