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1	0.06	0.21
2	0.05	0.16
3	0.10	0.23

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ˮ�Ӿ�̖	�M(j��n)ˮ	��ˮ	�M(j��n)ˮ	��ˮ
1	0.10	0.051	0.10	0.039
2	0.09	0.042	0.09	0.033
3	0.07	0.039	0.07	0.028

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�r�g	ρ(Fe3+)/��μg.L-1)			�ϸ��/%
�r�g	��	��С	ƽ��	�ϸ��/%
2001-07	50.63	18.5	35.6	37.5
2001-08	45.34	17.6	32.5	50
2001-09	38.52	15.2	27.6	80
2001-10	30.25	16.32	23.16	90

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