Table 4.

Normalized performance of algorithms for chlorophyll-a estimation at Taylorsville Lake using chlorophyll-a indices according to Pearson’s r test (Type-1) linear regressions. This test is used to normalize the slope and intercepts to facilitate a direct comparison between algorithms following the method of Kuedela et al. (2015).

ALGORITHMS	NO. OF POINTS	PEARSON’S R	PEARSON’S R2	P_VALUE	SLOPE	INTERCEPT
CASI CI_CHLA	70	0.823	0.678	<0.001	1.000	0.004
CASI MCI_CHLA	70	0.694	0.481	<0.001	1.001	−0.017
CASI FLH_CHLA	70	0.823	0.678	<0.001	1.000	0.004
CASI NDCI_CHLA	70	0.759	0.575	<0.001	1.000	0.000
CASI 2BDA_CHLA	70	0.811	0.658	<0.001	1.000	0.000
CASI 3BDA_CHLA	70	0.777	0.604	<0.001	1.000	0.000
WV2 NDCI_CHLA	70	0.699	0.488	<0.001	1.000	0.000
WV2 FLH VIOLET_CHLA	70	0.434	0.188	<0.001	1.000	0.009
WV2 2BDA_CHLA	70	0.706	0.499	<0.001	1.000	0.001
WV2 3BDA_CHLA	70	0.665	0.442	<0.001	1.000	0.000
S2 NDCI_CHLA	69	0.836	0.698	<0.001	1.000	0.000
S2 FLH VIOLET_CHLA	69	0.478	0.228	<0.001	1.000	0.009
S2 2BDA_CHLA	69	0.841	0.707	<0.001	1.000	0.001
S2 3BDA_CHLA	69	0.767	0.588	<0.001	1.000	0.000
L8 2NDCI_CHLA	69	0.108	0.012	0.375	1.000	0.000
L8 SABI_CHLA	69	0.130	0.017	0.288	1.000	0.000
L8 FLH BLUE_CHLA	69	0.563	0.317	<0.001	1.000	−0.009
L8 FLH VIOLET_CHLA	69	0.555	0.308	<0.001	1.000	0.012
L8 2BDA_CHLA	69	0.095	0.009	0.437	1.000	−0.001
L8 KIVU_CHLA	69	0.315	0.099	0.008	1.000	−0.001
L8 3BDA_CHLA	69	0.345	0.119	0.004	1.000	0.000
MODIS NDCI_CHLA	10	0.090	0.008	0.804	1.000	0.000
MODIS 2BDA_CHLA	10	0.112	0.013	0.758	1.000	−0.002
MERIS_CHLA*	3	N/A	N/A	N/A	N/A	N/A

^*The MERIS configuration only produced three usable water only pixels, which did not meet the minimal requirements to derive an accurate Pearson’s r statistical correlations.