Rivers of Bengaluru: A map-infographic reflects the rivers’ state

Vrishabhavathi river flow at Thagachguppe Bridge, Kumbalgodu (Image Source: Paani.Earth)
Vrishabhavathi river flow at Thagachguppe Bridge, Kumbalgodu (Image Source: Paani.Earth)
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Bengaluru rivers illustrated in a simple yet spatial way

Rivers of Bengaluru, a map-infographic is a simple spatial representation of rivers of concern to Bengaluru and how we connect with them. The rivers of concern are not limited to just the rivers that flow in the district, but also includes Cauvery and Netravathi from which we draw our drinking water. Since surface water flowing in the river and the groundwater is a single resource, the state of ground water is also represented.

The map includes the Bengaluru district and its 5 taluks including the BBMP area at the center, with rivers flowing in and around it. The datapoints given are: river origins, river lengths, elevation, groundwater status, past and present drinking water lifelines of Bengaluru, downward movement of waste and upward movement of water, besides hydrology and administrative boundaries.

The objective is to bring perspective on the use and abuse of rivers. Waste flows in natural river corridors without exception and water in man-made pipelines. Both devoid of life, flow in opposite directions.

The situation is especially stark for the rivers passing through the district: Vrishabhavathi, Arkavathi, Dakshina Pinakini, Chinnar and, Suvarnamukhi, as they are already converted into drains. Cauvery, the current drinking water source, is not spared either. Heavily polluted and altered, the river is in a dire state.

Mostly forgotten in all this chaos, is wildlife. They need water just like us.

Map of rivers of Bengaluru (Source: Paani.Earth)
Map of rivers of Bengaluru (Source: Paani.Earth). Click image to view the map

There are no long narratives with the map, allowing citizens to make their own observations. The map shows much more to a discerning eye. Tell us what else you see in the map at connect@paani.earth

About the map:

Like all the maps from Paani.Earth, this is built to scale using QGIS, a Free and Open-Source Geographic Information System. Geo-spatial data on administrative and forest boundaries is from Karnataka State Remote Sensing Application Centre’s (KSRSAC) Karnataka Geographic Information System (K-GIS). Survey of India Toposheets, Indiawris.gov.in, bhuvan.nrsc.gov.in along with google earth engine’s JRC Global Surface Water Mapping Layers are also referred to validate hydrology.

While most datapoints are from government reports, the rainfall and population are from Google Earth Engine datasets. Most important is the on-the-ground dialogues with river bank communities and government, that allowed to understand the nature and magnitude of human activities first hand, so as to build a narrative that reflects the state of affairs on the ground.

All datapoints are referenced in the image pdf.

About Paani.Earth

Paani.Earth was launched early this year, with an intention of empowering citizens with maps, data, information, and analysis for the conservation of rivers. It was founded by three individuals from diverse backgrounds:  

Nirmala Gowda is a Computer Engineer with an M.sc in Environmental Management from the University of San Francisco. She last worked for Novartis Pharmaceuticals in the US.

Dr. Nidhi Paliwal is dentist with 15 years of clinical practice including Manipal hospital.

Madhuri Mandava is an Electronics and Communications Engineer with an M.S in Electrical Engineering from the Pennsylvania State University. She last worked for Hughes Network Systems in the US.

The article was first published on Paani.Earth here and has been republished with the author's permission. 

Post By: Swati Bansal