Assessment of water quality of a river using an indexing approach during the low‐flow season

Abstract

The River Chenab is one of the largest rivers in Pakistan with an average annual flow of 5.29 billion cubic metres (BCM). The river traverses a total length of 576 km through a number of densely populated and industrial cities in the Punjab province of Pakistan. In the present study, a segment of 292 km was monitored for a variety of cardinal water quality constituents during the low-flow months of 2006-07 and 2007-08. Water quality indices (WQIs) were calculated for three uses of the river water, i.e. irrigation, drinking and aquatic life, using the CWQI 1.0 model developed by the task group of the Canadian Council of Ministers of the Environment (CCME). The results revealed that the lower river reach (185-233 km) was more polluted than the upper 185 km segment. In this river reach, overall WQI ranking was poor for drinking and marginal for both irrigation and aquatic life. The WQIs for all three uses were ranked poor at the sampling station located at 233 km along the river. Copyright Des index de qualité de l'eau (WQIs) ont été calculés pour trois usages de l'eau de rivière -irrigation, eau potable, vie aquatique -utilisant le modèle CWQI 1.0 développé par le groupe de travail du Conseil canadien des ministres de l'environnement (CCME). Les résultats ont indiqué que la partie la plus en aval du fleuve (185 à 233 kilomètres) était plus polluée que les 185 kilomètres en amont. Dans cette partie du fleuve, le classement global de WQI indiquait une qualité de l'eau mauvaise pour la consommation et médiocre pour l'irrigation et la vie aquatique. Les WQIs pour chacun des trois usages indiquaient une eau de mauvaise qualité à la station de prélèvement située à 233 kilomètres le long du fleuve.

Sediment control interventions and river flow dynamics: impact on sediment entry into the large canals

“…The full supply discharge capacity of Marala Ravi Link and Upper Chenab canals is 622 and 477 m 3 s -1 , respectively (Bhatti and Latif 2011). The average sediment Environ Earth Sci transport capacity of these canals is 199 mg l -1 and 356 mg l -1 , respectively (Shakir and Khan 2009).…”

Assessment of water quality of Obueyinomo River, Ovia North East Local Government Area, Edo State, Southern Nigeria

“…Other indirect laboratory test for assessing the DO is the BOD which is the amount of oxygen required to biologically break down a contaminant (Ugwu and Wakawa, 2012). BOD therefore is an important parameter of water indicating the health scenario of freshwater bodies (Bhatti and Latif, 2011). The BOD values obtained in this study were low when compared to the range of 9.55 -13.21 mg/L obtained by Ugwu and Wakawa (2012).…”

Correlation Study For the Assessment of Water Quality and Its Parameters of Ganga River, Kanpur, Uttar Pradesh, India

“…BOD is an important parameter of water indicating the health scenario of freshwater bodies [20]. In our study the BOD of surface water ranges from 2.6 mg/l to 32.4 mg/l with an annual mean of 19.6 ± 8.09.…”