Interaction between Soil Physicochemical Parameters and Earthworm Communities in Irrigated Areas with Natural Water and Wastewaters

Table 1

Average values of physicochemical characteristics of El Gourzi effluent wastewaters in 5 different upstream to downstream points [15].

Sites	T°C	pH	EC; (dS/m)	MES; (mg/l)	BOD5; mg (d’O2/l)	COD; mg (d’O2/100 ml)
1	13,1	8,66	2200	480,25	264,4	398,2
2	13,5	8,32	2750	530,03	224,28	357,6
3	13,4	8,21	2700	552,26	426,74	597,3
4	13,1	7,82	2390	525,09	264,18	503,4
5	12,9	7,55	1880	449,21	157,78	270,7

EC: electric conductivity; MES: suspended matter; BOD5: 5-day biological oxygen demand; COD: chemical oxygen demand.