Bangalore has turned into an urban heat island (UHI), and adviser to chief minister on urban affairs A Ravindra has blamed it on urban town planning being entrusted to those who are not town planning experts.
Your city has turned into an urban heat island (UHI), and advisor to chief minister on urban affairs A Ravindra has blamed it on urban town planning being entrusted to those who are not town planning experts.
UHIs are formed when buildings and infrastructure are constructed in a way that sunlight is absorbed, trapping it within the interiors of the buildings.
As the temperature within the buildings’ rooms increases, demand for air conditioning increases, and in turn leads to increased power consumption to reduce temperatures within.
But this also leads to heating of the outer surface of the structures, thus radiating heat outwards, causing the entire locality to become warmer.
In Bangalore this temperature difference is approximately 3 degree Celsius. UHI adds to global warming and has been the concern in many countries.
Worse, the heat outward radiation happens at night, and the night temperature increases.
Ravindra said, “When I was young we never needed a ceiling fan; the city itself was air-conditioned. Twenty years ago, when town planning was happening, out of 1,200 sq km, 800 sq km was planned to be kept as green space. But in subsequent blueprints, it was reduced to 500 sq km.”
He squarely blames the Bruhat Bangalore Mahanagara Palike (BBMP) for incorrect land use to allow Bangalore to generate heat islands. This has pushed up the average temperatures in the city over the years, he said.
“Most of the time, land use works are entrusted to those who are not experts in town planning. Sometimes they’re not even town planners who plan the major infrastructure,” he said. “Roofs made of reflecting tiles or green roofs, using permeable concrete for pavements, and increasing vegetation will bring down the temperature difference,” said Dave Mills, senior analyst, Stratus Consulting, USA, “There should be enough green spaces between high-rise buildings so that heat islands are not created,” said Monsingh D Devdas, dean, School of Architecture and Planning, Anna University.
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