International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
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Comparative Analysis of Valleys and water quality analysis in the Valley System of Bengaluru Using RS & GIS Ramesh Rathod1, Rekha H B2, Pavithra C.J3 1Ramesh
Rathod, PG student, Dept. of Civil Engineering, UVCE Banglore,560056, Karnataka, India H B, Associate Professor, Dept. of Civil Engineering, UVCE Bangalore, Karnataka, India 3Research scholar, Bangalore Institute of Technology, Bangalore, Karnataka, India. ---------------------------------------------------------------------***--------------------------------------------------------------------2Rekha
cascades down to the next lake in the lower series, based on elevation. They are essential for maintaining life and ensuring groundwater recharge. They are home for several species of organisms, support biodiversity and partially caters to the water demand of the city. Bengaluru has three main valley systems namely. Hebbal, Koramangala Challaghatta, Vrishbhavathi. (Pavitra, 2021).
Abstract Many lakes can be found in Bengaluru's three
major valley systems: Vrishbhavathi Valley, Hebbal Valley, and Koramangala-Challaghatta Valley, all of which play an essential role in the city's hydrological processes. The morphometric study aids us in learning about the underlying rock type, soil perviousness, slope gradients, runoff behavior, and water retention capability within the Valley systems. Morphometric analysis is carried out for areal, Linear and relief aspects. By using GIS software, the base map and drainage maps were created with the help of topographical maps and DEM data from the Survey of India. The Strahler system of stream ranking was adopted. Among the three Valleys, in terms of area and perimeter, Vrishbhavathi Valley appears to be the largest of the three Valleys The highest stream order in the Vrishbhavathi Valley basin is sixth, while the highest stream order in the other two Valleys is fifth. The Dendritic drainage patterns were observed within the Valley systems. The drainage density of the three Valleys revealed that they are classified as coarse drainage. The three Valleys have modest reliefs, indicating a flat topography. Lake Water samples & Ground water analysis results showed that lake water samples require treatment & lie in D classification, whereas ground water samples lie well within drinking water standards.
Now a day valleys system & lakes in Bengaluru get destroy due to rapid urbanization, lakes are got polluted day by day due to inflow of sewage, industrial waste water to the lake without treatment, the present study is intended to understand the physical characteristics valleys using various parameters which are derived from Remote sensing & GIS. The valley system and lakes used in the study has shown peculiar physical properties, these were different from the previous studies carried out on the same valley system and lakes. The study shall be useful for the organizations which carryout programmes for conservation of valley system and lakes, taking preventive measures to control pollution of lake water and increase inflow, storage capacity, quality control, public usage. Ground water management is very essential nowadays due to increase in depletion of ground water. hence study concentrated on following objectives:
Key Words: Valley, Lakes, Morphometry, RS & GIS, SRTM, DEM etc,
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Preparation of base maps to understand the characteristics of the Valley systems in the study area.
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Morphometric analysis of the valley systems in Bengaluru.
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Physico- chemical analysis of water quality in the selected lakes of valley system in Bengaluru.
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Ground water quality analysis for the sampling points selected around the lakes in the valley system.
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Comparative analysis of valley system & Physicochemical parameters of the lake water & their surrounding ground water in the study area.
1. INTRODUCTION Water is one among the foremost important resources supplied by nature, which occurs in the form of surface water and groundwater. The planet earth contains total 71% of water and 29% land. In that ocean contains 97% of the water and only 3% is fresh water. From total fresh water 30.1 percent may present in ground water and 68.6 percent may present in glaciers & ice caps. Bengaluru formerly known as "The City of Lakes" is located in the semi-arid peninsular plateau in the southeastern part of Karnataka. Bengaluru and surrounding region are not supported by perennial river system However, there are three major valley systems in Bangalore: Hebbal Valley, Challaghatta Valley, and Vrishbhavathi Valley, which house all of Bangalore's lakes. When one of these lakesâ overflows, the surplus water
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1.1 Study Area Bengaluru lies in the southeast of the South Indian state of Karnataka. It is at an average elevation of 900 m (2,953 ft). It is located at 12.97°N 77.56°E and covers an area of 741 km2 (286 sq m) (M. Inayathulla,2012).
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