Table 10 Spearman correlation between metrics selected for aquatic ecosystem health in 2011.

	MMIF	FBI	RHQI	IWFI
RHQI	0.629^*	−0.815^**	1.00	−0.675^*
Flow velocity and state	0.798^**	−0.838^**	0.823^**	−0.811^**
Water quantity	−0.213	−0.208	0.272	−0.235
Quantity of sediment in riverbed	0.667^*	−0.55	0.745^*	−0.495
Sediment coverage rate of silt	−0.571	0.609	−0.218	0.606
Riparian type	−0.293	0.522	−0.407	0.522
Erosion degree of riparian	0.484	−0.494	0.594	−0.292
Riparian width	0.626	−0.840^**	0.875^**	−0.659^*
Vegetation coverage	0.381	−0.243	0.358	−0.257
Vegetation structural integrity	−0.153	−0.19	0.572	0.038
Riparian land use pattern	0.754^*	−0.822^**	0.874^**	−0.737^*
IWFI	−0.844^**	0.915^**	−0.675^*	1.00
TP	−0.789^**	0.830^**	−0.584	0.758^*
NH₄⁺-N	0.526	−0.236	0.128	−0.297
COD	−0.437	0.55	−0.486	0.718^*
BOD₅	−0.495	0.552	−0.395	0.782^**
DO	0.581	−0.079	−0.067	−0.236

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