TABLE 5.

Comparison of Regional SPARROW Model Reservoir Loss Coefficient Estimates

Predictor Variable Type	Predictor Variable Description	Coefficient Units	Statistical Measures	MRB1	MRB2	MRB3	MRB4	MRB5	MRB7
Total nitrogen	Reservoir loss; inverse hydraulic load (m/year)	(m/year)−1	Estimate		10.7	6.7	10.5	12.1
			Standard error		2.20	1.45	4.36	2.75
			Significance level		<0.001	<0.001	0.008	<0.001
Total phosphorus	Reservoir loss; inverse hydraulic load (m/year)	(m/year)−1	Estimate	2.7	29.8	4.8	39.3	8.7
			Standard error	2.40	8.44	1.12	12.49	2.62
			Significance level	0.132	<0.001	<0.001	0.001	0.001

Notes: Values represent the coefficient estimates for the models, their standard error, and their significance levels. MRB, major river basin.