TABLE 6.

Calculated contributions of an assumed average runoff event to the annual loads (1997) of the creeks investigated within 12 h

Location	Parameter	Assumed annual loada	Load of a 12-h eventb	Contribution of a 12-h event to the annual load (%)c	Estimated value/ expected valued	Estimated value/corrected expected valuee
Nauholzbachf	Runoff (liters)	1.56×109	1.20×107	0.77	5.64	1.00
	Nitrate (tons)	10.63	0.14	1.29	9.44	1.67
	Nitrite (kg)	1.94	0.00	0.00	0.00	0.00
	Ammonia (kg)	0.00	0.00
	Total phosphorus (kg)	9.72	1.02	10.50	76.73	13.60
	CC 20°C (CFU)	6.91×1014	4.18×1013	6.05	44.17	7.83
	CC 37°C (CFU)	1.08×1014	3.93×1012	3.63	26.55	4.71
	E. coli (CFU)	3.42×1011	2.28×1010	6.67	48.73	8.64
	Coliforms (CFU)	1.73×1013	1.47×1012	8.49	62.01	10.99
	Fecal streptococci (CFU)	1.17×1011	1.56×1010	13.39	97.80	17.33
	C. perfringens (CFU)	2.33×1010	9.85×109	42.22	308.44	54.67
	Giardia cysts	0	0
	Cryptosporidium oocysts	3.73×107	1.37×106	3.67	26.80	4.75
Kallg	Runoff (liters)	9.18×109	5.52×107	0.60	4.39	1.00
	Nitrate (tons)	127.94	0.58	0.46	3.33	0.76
	Nitrite (kg)	127.05	3.81	3.00	21.91	4.99
	Ammonia (kg)	321.16	13.19	4.11	29.99	6.83
	Total phosphorus (kg)	119.99	4.46	3.72	27.17	6.19
	CC 20°C (CFU)	5.46×1015	2.79×1015	51.02	372.67	84.87
	CC 37°C (CFU)	1.70×1015	3.06×1014	18.03	131.73	30.00
	E. coli (CFU)	1.22×1013	7.17×1011	5.88	42.92	9.77
	Coliforms (CFU)	1.73×1014	1.09×1013	6.33	46.24	10.53
	Fecal streptococci (CFU)	4.96×1012	2.98×1011	6.01	43.91	10.00
	C. perfringens (CFU)	2.06×1012	1.38×1011	6.68	48.79	11.11
	Giardia cysts	8.72×107	0	0.00	0.00	0.00
	Cryptosporidium oocysts	2.43×108	7.89×108	3.24	23.69	5.40
Wahnbachh	Runoff (liters)	1.45×1010	4.49×107	0.31	2.26	1.00
	Nitrate (tons)	249.72	0.47	0.19	1.37	0.61
	Nitrite (kg)	1,450.16	4.05	0.28	2.04	0.90
	Ammonia (kg)	2,175.25	15.15	0.70	5.09	2.25
	Total phosphorus (kg)	2,233.25	11.17	0.50	3.65	1.61
	CC 20°C (CFU)	1.61×1016	1.68×1015	10.44	76.29	33.69
	CC 37°C (CFU)	4.81×1015	3.60×1014	7.48	54.63	24.13
	E. coli (CFU)	7.11×1013	6.16×1012	8.67	63.30	27.96
	Coliforms (CFU)	5.51×1014	3.96×1013	7.18	52.43	23.16
	Fecal streptococci (CFU)	1.89×1013	6.11×1012	32.43	236.86	104.62
	C. perfringens (CFU)	1.89×1013	1.93×1011	1.03	7.49	3.31
	Giardia cysts	1.60×108	5.57×106	3.49	25.52	11.27
	Cryptosporidium oocysts	1.89×108	7.66×106	4.07	29.69	13.12

^aEstimate for the average load of RS.

^bEstimate for the average load of ES.

^cAssumed value for an annual load without events (expected value, 0.137%).

^dAssumed value for regular runoff.

^eCorrected value considering the increased runoff.

^fFor Nauholzbach 16 RS and 7 ES were used.

^gFor Kall 26 RS and 11 ES were used.

^hFor Wahnbach 25 RS and 14 ES were used.