International Journal of Scientific Research in ___________________________ Research Paper . Multidisciplinary Studies E-ISSN: 2454-9312 Vol.6, Issue.2, pp.73-79, February (2020) P-ISSN: 2454-6143
Assessment of Irrigation Water Quality Index for Upper Cauvery Karnataka India Mohammed Badiuddin Parvez1*, M. Inayathulla2 1,2
Department of Civil Engineering, UVCE, Bangalore University, Bangalore, Karnataka, India *Corresponding Author: parvezuvce@gmail.com Available online at: www.isroset.org Received: 21/Jan/2020, Accepted: 13/Feb/2020, Online: 28/Feb/2020
Abstract- An attempt has been made to develop water quality index (WQI), using Five water quality parameters pH, Nitrates, Chloride, electrical conductivity and fluoride measured at 137 different locations in the study area rating scale is developed based on FAO standards. It was found that 133 samples have the water quality index less than 150 and 4 samples have water quality index between 150-300. By spatial variation of WQI it can be found that 97.08 percent of the water in the area is excellently suitable for irrigation. Keywords: Chloride, Electrical Conductivity, Fluoride, Irrigation, pH, WQI. I. INTRODUCTION The Cauvery river enters Tamil Nadu at Hognekal of Dharmapuri district from the west and takes a southern course from Mettur and again takes south-eastern course at Erode and then flows to Bay of Bengal flowing through Trichirapalli, Thanjavur and Cuddalore districts. The study area forms part of Cauvery basin, which lies on left banks of Cauvery river. Lakshmantirtha river is a major tributary to river Cauvery and has its originates in Brahmagiri Devasi Hills of Western Ghats in southern Kodagu district and flows through a distance of about 130 km. It enters the Mysore district near Chikkahejjur, south west of Konana Hosahalli in Hunsur taluk and flows through Hangodu, Hunsur and Kattemalavadi before its confluence with Cauvery on the right side at Sagarkatte in Krishnarajanagar taluk.
The study area geographically lies between 750 29’ 19” E and 760 37’ 40” E longitude and 110 55’ 54” N and 130 23’ 12.8” N latitude, as shown in Fig 1, and it covers an area of 10874.65 Sq km. The maximum length and width of the study area is approximately equal to 143.73 km and 96.75 km respectively. The maximum and minimum elevation of the basin is 1867 m and 714 m above MSL, respectively. The study area covers five district of Karnataka state i.e., Chikmangalur, Hassan, Kodagu, Mandya and Mysore as shown in Fig 2. There are 137 sample location named as S1, S2 upto S137 as shown in Table 3 the water parameters such as pH , EC, Cl, NO3 and F are considered for estimation of irrigation water quality index.
Water Quality Index allows for a general analysis of water quality on many levels that affect a stream’s ability to host life and whether the overall quality of water bodies poses a potential threat to various uses of water. Relevant studies on water quality index (WQI) and its modeling were reviewed. WQI is valuable and unique rating to depict the overall water quality status in a single term that is helpful for the selection of appropriate treatment technique to meet the concerned issues. .Water quality indices are tools to determine conditions of water quality. Creating the WQI involves three main steps (1) obtain measurements on individual water quality indicators (2) transform measurements into ‘‘subindex’’ values to represent them on a common scale (3) aggregate the individual subindex values into an overall WQI value. II. MATERIALS AND METHODS 2.1 Study Area Fig 1 Location Map of Study Area © 2020, IJSRMS All Rights Reserved
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