Assessment of solid wastes choking open sewers and vulnerability to urban flooding
Shwetmala1,2           HN Chanakya2          T.V. Ramachandra1
1Energy and Wetlands Research Group, Centre for Ecological Sciences [CES],2Centre for Sustainable Technologies (astra),
Indian Institute of Science, Bangalore – 560012, India.
*Corresponding author:


Urbanisation reflects metropolitan growth (planned or unplanned) in response to economic, social, political and physical geography of an area. Dynamic urban change processes, especially the tremendous expansion of urban areas affect natural and human systems at multiple scales. Unplanned rapid urbanisation has changed the structure and also influenced the functioning of landscapes as evident from lack of basic infrastructure, amenities, enhanced levels of pollution, changes in local climate and ecology. In this regard, Earth observation satellites provide information over a considerable range of spatial and temporal resolution for mapping land cover (LC) to understand the spatial and temporal aspects of landscapes. These data are classified to derive metrics that are quantitative measures for spatial pattern, which are helpful in understanding the landscape dynamics and linking the agents of change. Here, we analyse temporal remote sensing data of diverse spatial and spectral resolutions for Greater Bangalore. The city was divided into 8 zones to analyse the landscape metrics using classified data from 1973 to 2010. The study reveals that there has been a 584% urban growth with a 66% decline in water bodies and 74% decrease in vegetation cover. The city was more compact in 1973 and began to disperse in all directions with decrease in the ratio of open space and increase in the number of urban patches as well as urban density. Most large urban patches have developed in west, south-west and southern regions of the city corresponding to the policy decision of setting up small scale industries, Information Technology-Bio-Technology firms and consequent housing projects.

Keywords: Urbanisation, landscape, spatial metrics, urban planning, remote sensing

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Citation : Shwetmala, Chanakya H.N., and Ramachandra T. V., (2011), Assessment of solid wastes choking open sewers and vulnerability to urban flooding, Proceedings of 2nd International conference on solid waste management and exhibition, Jadavapur University, Kolkata, 9-11-2011.
* Corresponding Author :
Dr. T.V. Ramachandra
Energy & Wetlands Research Group, Centre for Ecological Sciences, Indian Institute of Science, Bangalore – 560 012, India.
Tel : +91-80-2293 3099/2293 3503-extn 107,      Fax : 91-80-23601428 / 23600085 / 23600683 [CES-TVR]
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