Site news

BBMP NEED TO MAKE DEEP “RAJAKALVE” WITH SIDE CONCRETE WALLS AND NEED TO MAKE WIDE AND DEEP DRAINAGE SYSTEMS

 
 
Picture of System Administrator
BBMP NEED TO MAKE DEEP “RAJAKALVE” WITH SIDE CONCRETE WALLS AND NEED TO MAKE WIDE AND DEEP DRAINAGE SYSTEMS
by System Administrator - Monday, 15 August 2016, 4:12 PM
 

By: M.S.Yatnatti: Editor and Video Journalist Bengaluru: Drainage system: Several hundred buildings have been demolished by BBMP engineers alleging that they had encroached Rajakalve .But this will not solve the Bengaluru water drainage problem. The blunder committed by urban planners .No wide and deep drainage systems is planned as per requirements of city growth. As there is urgent need to close the polluted lakes at the same time big new drains need to constructed to drain out the storm water outside Bangalore .As you widen the roads at the same time you need to widen the drains to drain out the water outside the city . The drainage system is an essential part of living in a city or urban area, as it reduces flood damage by carrying water away.Fundamentally, the existing infrastructure and drainage system in the city cannot handle the excess water whenever there's a downpour. Originally, stormwater drains in Bangalore were designed in keeping with the three valleys that run across the city --- Vrishabhavathy, Hebbal and Koramangala-Challaghatta. They served the purpose so long as the population of the city was within a certain limit. The unprecedented growth of Bangalore, unaccompanied by the necessary infrastructure, has precipitated problems of a large magnitude. The city drainage system comprises major drains which need to widenedas you are widening roads , roadside drains and shoulder drains need to be widened , otherwise all of which get overburdened during the rainy season and city may sunmerged like Chennai disaster happened recently. .

LAKES "KERE” are breeding grounds of the dengue aedes mosquitoes in urban areas "close them”.As there is urgent need to close the polluted lakes at the same time big new wide and deep drains need to constructed to drain out the storm water outside Bangalore .Urban planners only given thrust on wide roads and fly over's without deepening and widening storm water drainage system which makes many urban cities to submerge during rainy season. Be it the impact of climate change and global warming or something else, we must be prepared for changes in temperature and untimely rain and floods. Without catchment areas and down steam farming areas Kere and Small tanks have become stagnant water bodies and breeding ground for mosquitoes and such urban water bodies need to be closed and convert them into open grounds and urban forests. Earlier to urbanization every Kere and Tank bund had huge catchment area to provide fresh water and through tank bund water was flowing in downstream providing water for irrigation and drinking purposes and lake should be retained only in agricultural and green belt areas only..In view of urbanization no catchment area exists as it is already converted intobig layoutsand there by Kere and Tank became dried and dried Kere and Tank also were converted into layouts as no water exists there and today government demolishing the buildings in such dried Kere and Tank bund was an illegal exercise ,Government should ask the technical experts to make research on the subject as even live Kere and Tank bund does not have huge catchment area to provide fresh water through tank bund and water is stagnated and stagnated water mixed with sewage water has become breeding ground for mosquitoes and they spread dengu and other diseases to all Bangalore population.

Drainage system : As there is urgent need to close the polluted lakes at the same time big new drains need to constructed to drain out the storm water outside Bangalore .As you widen the roads at the same time you need to widen the drains to drain out the water outside the city . The drainage system is an essential part of living in a city or urban area, as it reduces flood damage by carrying water away.Fundamentally, the existing infrastructure and drainage system in the city cannot handle the excess water whenever there's a downpour. Originally, stormwater drains in Bangalore were designed in keeping with the three valleys that run across the city --- Vrishabhavathy, Hebbal and Koramangala-Challaghatta. They served the purpose so long as the population of the city was within a certain limit. The unprecedented growth of Bangalore, unaccompanied by the necessary infrastructure, has precipitated problems of a large magnitude. The city drainage system comprises major drains which need to widenedas you are widening roads , roadside drains and shoulder drains need to be widened , otherwise all of which get overburdened during the rainy season and city may submerged like Chennai disaster happened recently. .

Design New Drainage for Bengaluru: Flood risks and drainage are key considerations when planning all new suburbs. Today, underground drainage systems are generally designed to cope with frequent storms - those with a 20% chance of occurring in a year. Any excess water travels along planned overland flow paths that carry water away from properties. This prevents them from flooding in the majority of storms - up to those with a 1% chance of occurring in a year.We also look at other benefits when designing drainage systems, including the impact on rivers and creeks. For example, when building drainage inBengaluruwe also need to installgross pollutant traps, which capture large litter items like plastic bags, bottles, newspapers and cigarette butts to prevent them being washed into rivers and creeks. We need to createBasin to include a wetland to improve storm water quality, provide greater flood protection, and allow stormwater to be harvested to water harvestingopen spaces. Entering stormwater drains is dangerous and illegal, and could cost you your life or endanger others who rescue you. What's required is a comprehensive approach to the problem, which essentially involves putting in place a new widened sustainable drainage management system as in developed countries. A storm water drain renovation and widening and deepening and management project had to be prepared for Bangalore andimplementation it without delay. In the meantime, risk assessment of vulnerable areas must be carried out and corrective measures taken to minimize them.

Bengaluru's lake scene is turning from bad to worse.And it's not just the story of Bellandur and Varthur.A study by experts from the Centre of Ecological Sciences, Indian Institute of Science (IISc), gives a clear and pathetic picture of the city's lakes.Of the 105 lakes studied, 97% of them have been encroached upon while 90% have been fed with sewage on a daily basis.Over the past few months, the team of researchers went on field trips and gathered samples from 105 lakes, of which 25 are seasonal lakes. The researchers came across very few water bodies where sewage isn't let in and are consi derably less polluted."All these lakes have become victims of inflow of untreated or partially treated sewage and in dustrial effluents. Secondly , there has been encroachment of lake bed, flood plains and the lake itsel for infrastructure activities. The third biggest problem is unautho rized dumping of municipal solid waste and construction debris," said Professor TV Ramachandra who spearheaded the study .While conducting the research, the professor and his students came across at le ast 20 frothing lakes. "Where peo ple are less submissive, nobody rai ses their voice about the frothing Sarakki lake and one near Mandur are examples for this," said a stu dent, who was part of the study .

Polluted water bodies spawn dengue acoording to press reports: Reportedly City doctors say dengue cases have fallen, but not so in areas around polluted lakes. Highly pol luted lakes like Bellandur Varthur and Yemlur have tur ned into a breeding ground for Aedes mosquitoes pushing up the incidence of the disease in these areas."When I shifted to Bel landur eight years ago, I never imagined I was buying a house next to a major mosquito breeding ground and not a lake" saida resident.The lakeside is used as a dumping ground for passersby, residents and commuters. "Meat shops here also dump their waste into he lake. The rainfall results in garbage spreading all over the place and the next day I hear a child down with viral that is later diagnosed as dengue," added the resident .The closest hospital to the frothing lake is Sakra World Hospital on Outer Ring Road. "In October alone, we received 10-15 cases of dengue and denguelike symptoms. We are admitting at least three patients daily" said Dr Raghu J, Senior Consultant, Internal Medicine, Sakra World Hospital.Dengue has become like common cold here, say residents. The most vulnerable are children followed by senior citizens and pregnant women., a resident of Bellandur, said, "My father is suffering from dengue right now. The amount of water logging in our area along with the frothing lake is contributing to this."However, Columbia Asia Hospital, Whitefield, said that dengue cases have not gone up substantially . "With winter setting in, respiratory infections and acute bronchitis are up. But we do get more cases from Bellandur and Varthur side" said Dr Nupur Trivedi, chief of Medical Services, Columbia Asia, Whitefield.