Preliminary Study on Physico-Chemical Parameters and Phytoplankton of Chiffa River (Blida, Algeria)

Table 1

Monthly variations of mean values of physico-chemical parameters in Chiffa river.

Parameters	April	May	June	July	August	Algerian guidelines	WHO Standards
𝑇 (°C)	15.0	20.7	19.3	22.7	22.7	30	25–30
pH	7.6	7.6	7.6	7.5	7.6	6.5–8.5	6.5–8.5
EC (mS⋅cm^−1)	1.00	0.90	1.03	0.87	1.06	2800	180–1000
NO3^− (mg⋅L^−1)	3.00	0.67	7.00	0.00	0.00	50	50
NO2^− (mg⋅L^−1)	0.28	0.00	0.00	0.00	0.00	0.1	≤0.1
NH4^+ (mg⋅L^−1)	0.00	0.03	0.00	0.00	0.00	0.5	≤0.1
PO4^3− (mg⋅L^−1)	0.06	0.94	0.14	0.01	0.00	0.5	0.2
Na^+ (mg⋅L^−1)	47.00	19.33	41.33	43.67	44.33	100	150
Cl^− (mg⋅L^−1)	46.67	35.67	52.00	48.00	47.33	250	250
Ca^2+ (mg⋅L^−1)	101.67	83.33	104.67	90.33	92.00	75	200
Mg^2+ (mg⋅L^−1)	34.67	37.67	31.00	27.33	30.33	50	50
Org. m. (mg⋅L^−1)	3.93	1.13	0.40	1.43	1.23		<5
Chl.a (µg⋅L^−1)	0.70	1.87	9.95	132.3	85.56
HCO3^− (mg⋅L^−1)	242.7	248.7	224.7	219.7	219.3	200

Temp: temperature; EC: electrical conductivity; NO₃⁻: nitrate; NO₂⁻: nitrite; NH₄⁺: Ammoniac; PO₄³⁻: Phosphate; Na⁺: Sodium; Cl⁻: Chloride; Ca²⁺: Calcium; Mg²⁺: Magnesium; Org m.: organic matter; Chl.a: Chlorophyll a; HCO₃⁻: Bicarbonate.