Pollution Abatement Strategies in a Stretch of River Kahn at Indore, India
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CASE STUDY
Pollution Abatement Strategies in a Stretch of River Kahn at Indore, India Krishna Kumar Shrivastava1 • Rakesh Kumar Shrivastava1 • Shrey Vimal Jain2
Received: 11 November 2019 / Accepted: 5 October 2020 Ó The Institution of Engineers (India) 2020
Abstract River pollution is one of the major concerns for sustaining a healthy and liveable environment as rivers are prime source of water for the majority of livelihoods. Selfpurification of river is mistaken as treatment of wastewater and results into heavy discharge of waste water either into the tributaries or directly into the river by human beings. Continuous deterioration of river water by means of sewage changes the perception of river into open sewer drain popularly known as nallahs. The present study deals with the strategies required for a stretch of 4 km of one such nallah i.e. river Kahn to prevent the pollution and make the water flowing in the river of acceptable quality. The study indicates the current status of river Kahn which receives domestic waste water directly through various outfalls of residential colonies by measurement of water quality parameters. Feasibility for an in situ treatment based on constructed wetland has been analysed and proposed as one of the remedial measure that can be considered as initial step towards restoring river Kahn. Keywords Environment River pollution Sewage In-situ treatment Kahn river
& Krishna Kumar Shrivastava [email protected] 1
Civil Engineering and Applied Mechanics Department SGSITS, Indore 452001, India
2
Global Environment Consultancy Services, Indore 452016, India
Introduction River Kahn flows through Indore city and have confluence with river Saraswati at the heart of the city [1]. Kahn river was major source of water for individuals of Indore some decades ago, but now, the river is turned into an open drainage (nallah) due to which the usefulness and historical importance is spoiled. The domestic and industrial effluents are directly discharged into Kahn river without even the primary treatment resulting in high pollution level. The river water when tested indicates the presence of heavy metals and other pathogenic pollutants as reported by several investigators [2]. Rapid increase in demographic numbers of Indore city is a result of growth in industrial sector and boosted urbanization. Many efforts have been made by Indore Municipal Corporation to prevent mixing of waste water into Kahn includes nallah tapping, improvement of existing sewer network, but there are no signs of cleanliness of river. Several studies have, however, shown that to overcome problem of river pollution, decentralized waste water treatment has emerged as one of the effective proposition [3]. As per the quality of river water, the degree of treatment required is analysed in order to maintain quality of river water as per Indian standards. There are numerous factors involved while analysing the feasibility of a decentralized system and associated treatment technologies as site-specific parameters effect e
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