Prediction of fecal indicator organism concentrations in rivers: the shifting role of environmental factors under varying flow conditions

Herrig, Ilona; Seis, Wolfgang; Fischer, Helmut; Regnery, Julia; Manz, Werner; Reifferscheid, Georg; Böer, Simone

doi:10.1186/s12302-019-0250-9

Environmental Sciences Europe

Table 1 Descriptive statistics (min: minimum, max: maximum; avg: average, SD: standard deviation; n: number of observations) of monitored environmental parameters and FIO concentrations in rivers Rhine and Moselle during sampling periods 1 (October 2010–October 2011) and 2 (January 2016–January 2017)

From: Prediction of fecal indicator organism concentrations in rivers: the shifting role of environmental factors under varying flow conditions

	Unit	Rhine					Moselle
	Unit	Min	Max	Avg	SD	n	Min	Max	Avg	SD	n
*Sampling campaign 1 (2010/11)*
E. coli	MPN/100 mL	< 15	12,690	811	2319	51	8	9826	928	2010	52
Enterococci	CFU/100 mL	2	1840	128	292	50	2	2450	276	578	50
Coliphages	PFU/100 mL	20	2380	537	581	52	10	5440	708	1044	48
Water temp	°C	4.2	24.6	14.6	6.5	366	1.7	23.4	13.3	6.9	366
O₂	mg/L	7.1	12.2	9.8	1.6	366	5.6	17.2	10.9	2.7	366
pH	–	7.85	8.56	8.13	0.16	357	7.67	8.85	8.08	0.29	366
Turbidity	TE/F	5.0	214.1	16.0	23.4	366	2.1	287.2	18.3	33.9	350
Conductivity	µS/cm	337	578	474	56	366	350	1381	987	171	366
Chl a	µg/L	1.5	62.5	12.6	17.2	49	0.5	93.5	18.9	25.6	50
Discharge	m³/s	744	5500	1502	813	366	18	2560	256	386	366
Solar irradiance^a	Wh/m²	542	46,153	17,090	12,127	366	542	46,153	17,090	12,127	366
Solar irradiance^a _(3d-sum)	Wh/m²	2871	130,352	51,188	33,646	366	2871	130,352	51,188	33,646	366
Rainfall^a	mm	0.0	163.0	8.5	19.0	366	0.0	163.0	8.5	19.0	366
Rainfall^a _(5d-sum)	mm	0.0	294.5	42.4	51.9	366	0.0	294.5	42.4	51.9	366
*Sampling campaign 2 (2016/17)*
E. coli	MPN/100 mL	15	10,690	941	2057	54	8	5712	782	1573	53
Enterococci	CFU/100 mL	4	2772	231	575	54	5	2407	285	578	53
Coliphages	PFU/100 mL	30	4414	606	762	53	10	5080	1004	1116	52
Water temp	°C	2.2	24.5	13.0	6.4	345	0.0	24.1	12.8	7.1	348
O₂	mg/L	7.3	13.2	9.8	1.6	372	6.4	13.3	9.8	1.7	347
pH	–	7.67	8.27	7.96	0.12	369	7.72	8.11	7.94	0.08	348
Turbidity	TE/F	3.1	336.6	13.6	21.2	372	0.8	200.6	18.0	28.4	351
Conductivity	µS/cm	349	635	439	63	372	370	1297	870	218	352
Chl a	µg/L	0.3	26.6	3.0	3.8	50	0.2	10.4	2.0	2.2	48
Discharge	m³/s	653	3970	1701	810	372	44	1740	320	334	372
Solar irradiance^a	Wh/m²	1069	44,382	15,858	11,562	372	1069	44,382	15,858	11,562	372
Solar irradiance^a _(3d-sum)	Wh/m²	4333	123,250	47,630	31,647	372	4333	123,250	47,630	31,647	372
Rainfall^a	mm	0.0	220.6	10.3	22.3	372	0.0	220.6	10.3	22.3	372
Rainfall^a _(5d-sum)	mm	0.0	427.5	51.7	65.0	372	0.0	427.5	51.7	65.0	372

		Pegel Kaub (Rhine)	Pegel Cochem (Moselle)
MHQ	m³/s	4280^b	2010^c
MQ	m³/s	1650^b	313^c
MNQ	m³/s	780^b	60.1^c

^aSum of weather stations Valwig, Winningen, Mayen, Mülheim-Kärlich, Bingen-Gaulsheim and Bacharach
^bReference period: 1930–2015 (web-based information platform Undine; refer to http://www.undine.bafg.de)
^cReference period: 1900–2015 (web-based information platform Undine; refer to http://www.undine.bafg.de)

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