The biological stability(assessed by AOC), had close relation to tannin value, and was increasing with the tannin value, but it had no velation to the pore size distribution.

• 滤池出水的生物稳定性与单宁酸值有密切关系，单宁酸值越低，出水的生物稳定性越高，与孔径的分布则没有关系。