Satellite data and real time stations to improve water quality of Lake Manzalah

Peer review under responsibility of National Water Research Center.

Figures & data

Fig. 1 Location of the study area.

Fig. 2 RTWQ station locations at Lake Manzalah.

Fig. 3 Variability of turbidity and chlorophyll at RTWQ stations.

Table 1 Descriptive statistics of in situ water quality parameters.

	TUR	CHL
Number of observations	3954	3629
Minimum value	2.20	2.40
Maximum value	439.00	199.26
Median	18.50	34.59
Mean	23.31	41.15
Standard deviation	9.27	11.31

Table 2 Correlation between water quality parameters and WeW/FUB output.

	TUR	CHL	ln(TUR)	ln(CHL)
B1	–	−0.70	−0.75	−0.79
B2	–	−0.72	−0.75	−0.80
B3	–	−0.73	−0.73	−0.81
B4	–	0.73	−0.74	−0.81
B5	–	−0.72	−0.73	−0.78
ln(B4)	–	–	–	−0.73
ln(B5)	–	–	−0.72	–
ln(B9/B7)	0.66	0.87	0.73	0.77

Table 3 Correlation between water quality parameters and processor output.

	TUR	CHL
TSM Boreal	−0.60	–
TSM C2R	−0.73	–
TSM Eutrophic	−0.67	–
CHL Boreal	–	0.88
CHLC2R	–	0.94
CHL Eutrophic	–	0.88

Fig. 4 Log-transformed TOA band ratio vs. log-transformed TUR and CHL.

Table 4 Correlation between water quality parameters and TOA band ratios.

	TUR	CHL	Ln(TUR)	Ln(CHL)
B9/B7	0.83	0.88	0.90	0.87
Ln(B9/B7)	0.82	0.86	0.91	0.88

Fig. 5 Satellite-derived water quality products – July 29, 2009.