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'''Powai Lake'''<span style="color:rgb(0,0,0);font-family:sans-serif;line-height:19.200000762939453px;"> (named after Framaji Kavasji Powai Estate) is an artificial </span>[http://en.wikipedia.org/wiki/Lake lake]<span style="color:rgb(0,0,0);font-family:sans-serif;line-height:19.200000762939453px;">, situated in </span>Mumbai<span style="color:rgb(0,0,0);font-family:sans-serif;line-height:19.200000762939453px;">, in the </span>Powai
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'''Powai Lake'''<span style="color:rgb(0,0,0);font-family:sans-serif;line-height:19.200000762939453px;"> (named after Framaji Kavasji Powai Estate) is an artificial </span>[http://en.wikipedia.org/wiki/Lake lake]<span style="color:rgb(0,0,0);font-family:sans-serif;line-height:19.200000762939453px;">, situated in </span>[http://en.wikipedia.org/wiki/Mumbai Mumbai]<span style="color:rgb(0,0,0);font-family:sans-serif;line-height:19.200000762939453px;">, in the </span>[http://en.wikipedia.org/wiki/Powai Powai]
 
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! class="fn org" colspan="2" style="vertical-align:top;font-size:14px;text-align:center;"|Powai Lake
 
! class="fn org" colspan="2" style="vertical-align:top;font-size:14px;text-align:center;"|Powai Lake
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<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">valley, where a Powai village with a cluster of huts existed. The city suburb called Powai shares its name with the lake. [http://en.wikipedia.org/wiki/Indian_Institute_of_Technology,_Bombay Indian Institute of Technology, Bombay], one of the premier institutions of science and technology in India, is located to the east of the lake. Another famous institution, the National Institute of Industrial Engineering (NITIE), is also located close to the lake. Housing complexes and plush hotels are developed all around the lake periphery. Population around the lake has thus substantially increased over the years.</p>
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<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">valley, where a Powai village with a cluster of huts existed. The city suburb called [http://en.wikipedia.org/wiki/Powai Powai]shares its name with the lake. [http://en.wikipedia.org/wiki/Indian_Institute_of_Technology,_Bombay Indian Institute of Technology, Bombay], one of the premier institutions of science and technology in India, is located to the east of the lake. Another famous institution, the National Institute of Industrial Engineering (NITIE), is also located close to the lake. Housing complexes and plush hotels are developed all around the lake periphery. Population around the lake has thus substantially increased over the years.</p>
   
 
<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">The Powai Lake has gone through many stages of water quality degradation. The lake water which used to supply drinking water for Mumbai has been declared unfit to drink. The lake still remains a tourist attraction.When it was built, the lake had an area of about 2.1 square kilometres (520 acres) and the depth varied from about 3 metres (9.8 ft) (at the periphery) to 12 metres (39 ft) at its deepest.</p>
 
<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">The Powai Lake has gone through many stages of water quality degradation. The lake water which used to supply drinking water for Mumbai has been declared unfit to drink. The lake still remains a tourist attraction.When it was built, the lake had an area of about 2.1 square kilometres (520 acres) and the depth varied from about 3 metres (9.8 ft) (at the periphery) to 12 metres (39 ft) at its deepest.</p>
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<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">Before the lake was built by the British, in the year 1799 A.D., the estate where the lake is now located was leased on a yearly rent to Dr. Scott and after his death in 1816 A.D., the government took control of the estate in 1826 A.D., and leased it once again to Mr. Framaji Kavasji, then the vice-president of the Agricultural and Horticultural Society of Western India , after whom the lake was named when it was built in 1891.</p>
 
<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">Before the lake was built by the British, in the year 1799 A.D., the estate where the lake is now located was leased on a yearly rent to Dr. Scott and after his death in 1816 A.D., the government took control of the estate in 1826 A.D., and leased it once again to Mr. Framaji Kavasji, then the vice-president of the Agricultural and Horticultural Society of Western India , after whom the lake was named when it was built in 1891.</p>
   
<p style="margin-top:0.4em;margin-bottom:0.5em;line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">A stream tributary of the Mithi river, which served the Powai village's water supply needs, was dammed in 1891, [[File:Pl2.jpg|thumb|250px]]during the British period, initially to augment water supply to the Bombay city (now called Mumbai), by constructing two dams of 10 m height each to store the rain waters flowing from the lower slopes of the Western Ghats and streams from the eastern and northeastern slopes of hills. It was planned as an antiwater famine measure, to the southeast of Vihar Lake (a much larger lake) also for water supply to Mumbai city. The scheme was taken in hand in 1889. Though it was completed within a year at an initial cost of more than Rs. 6,50,000 and started providing two million gallons of water per day, it had to be abandoned due to the hue and cry against the quality of the water. Five lakhs of rupees more were spent on the scheme in 1919 in a vain attempt to restore the supply at least for the use of the suburbs, but this, too, was given up with the development of the Tansa works.</p>
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<p style="margin-top:0.4em;margin-bottom:0.5em;line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">A stream tributary of the [http://en.wikipedia.org/wiki/Mithi_river Mithi river], which served the Powai village's water supply needs, was dammed in 1891, [[File:Pl2.jpg|thumb|250px]]during the British period, initially to augment water supply to the Bombay city (now called Mumbai), by constructing two dams of 10 m height each to store the rain waters flowing from the lower slopes of the Western Ghats and streams from the eastern and northeastern slopes of hills. It was planned as an antiwater famine measure, to the southeast of [http://en.wikipedia.org/wiki/Vihar_Lake Vihar Lake] (a much larger lake) also for water supply to Mumbai city. The scheme was taken in hand in 1889. Though it was completed within a year at an initial cost of more than Rs. 6,50,000 and started providing two million gallons of water per day, it had to be abandoned due to the hue and cry against the quality of the water. Five lakhs of rupees more were spent on the scheme in 1919 in a vain attempt to restore the supply at least for the use of the suburbs, but this, too, was given up with the development of the Tansa works.</p>
   
 
<p style="margin-top:0.4em;margin-bottom:0.5em;line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">After the drinking water supply objective of the lake was abandoned in the early 1890s, in view of poor quality of the water stored, caused due to pollution, [http://en.wikipedia.org/wiki/Water_hyacinth water hyacinth] and [http://en.wikipedia.org/wiki/Weed weeds], untreated sewage and large silt deposit, the lake was leased out to the Western India Fishing Association, a quasi government organisation, who used it for both fish culture and angling. Later, the Bombay Presidency Angling Association was formed in 1936 and later in 1955, under the Societies Registration Act 1860, it was registered as “The Maharashtra State Angling Association” (MSAA) and the lake is now under their control. Realising the gravity of the environmental pollution of the lake, the MSAA has revised its constitution,</p>
 
<p style="margin-top:0.4em;margin-bottom:0.5em;line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">After the drinking water supply objective of the lake was abandoned in the early 1890s, in view of poor quality of the water stored, caused due to pollution, [http://en.wikipedia.org/wiki/Water_hyacinth water hyacinth] and [http://en.wikipedia.org/wiki/Weed weeds], untreated sewage and large silt deposit, the lake was leased out to the Western India Fishing Association, a quasi government organisation, who used it for both fish culture and angling. Later, the Bombay Presidency Angling Association was formed in 1936 and later in 1955, under the Societies Registration Act 1860, it was registered as “The Maharashtra State Angling Association” (MSAA) and the lake is now under their control. Realising the gravity of the environmental pollution of the lake, the MSAA has revised its constitution,</p>
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<h2 style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">Location</h2>
 
<h2 style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">Location</h2>
 
==Access==
 
==Access==
<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">The lake is about 40 kilometres (25 mi) from Mumbai by road and is approached via King's Circle, Sion, and Kurla or through Santa Cruz and Andheri. Kanjurmarg on the central main line of the Mumbai Suburban Railway is the nearest railway station to the lake.</p>
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<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">The lake is about 40 kilometres (25 mi) from [http://en.wikipedia.org/wiki/Mumbai Mumbai] by road and is approached via King's Circle, [http://en.wikipedia.org/wiki/Sion,_Mumbai Sion], and [http://en.wikipedia.org/wiki/Kurla Kurla] or through [http://en.wikipedia.org/wiki/Santacruz,_Mumbai Santa Cruz] and [http://en.wikipedia.org/wiki/Andheri Andheri][http://en.wikipedia.org/wiki/Kanjurmarg Kanjurmarg] on the central main line of the [http://en.wikipedia.org/wiki/Mumbai_Suburban_Railway Mumbai Suburban Railway] is the nearest railway station to the lake.</p>
 
==Hydrology and water quality==
 
==Hydrology and water quality==
<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">It is reported that the average rainfall at Powai is about 2,540 centimetres (1,000 in), and the lake overflows for about for sixty days each year. The overflow from the lake flows into the Mithi River. Silt studies conducted in 1995 estimates that 4500 lakh cubic metres of silt has been deposited in the lake since its construction. It supplied two million gallons of water to Bombay (now Mumbai) when it was built. Following the construction of the Tansa dam and creation of the reservoir, in 1892, Powai waters were used for irrigation. The lake drains a catchment of 6.61 km<sup style="line-height:1em;">2</sup> (part of the Powai-Kanheri hill ranges which also drain into the adjoining Vihar Lake and Tulsi Lake). The dam, built in stone masonry has a height varying from 3 m to 6m with top level of the dam kept at E.L. 58.5 m (with Town hall datum). Government of [http://en.wikipedia.org/wiki/Maharashtra Maharashtra] reports that due to [http://en.wikipedia.org/wiki/Eutrophication eutrophication] of the lake water from untreated sewage and garbage from nearby residential and slum colonies, the lake water is unfit for drinking water use. Hence, the lake is now used for recreation, gardening, cattle washing and fishing. The water of the lake is also supplied to Aarey colony and [http://en.wikipedia.org/wiki/Larsen_%26_Toubro Larsen & Toubro] for non domestic uses.[http://en.wikipedia.org/wiki/Dissolved_Oxygen Dissolved Oxygen] (DO) level at the bottom of the lake is reported to be 0.71 mg/litre and at surface 4.11 mg/litre, average value of pH is 7.2 and COD is 42.70 mg/litre on the surface and 119 mg/litre at the bottom of the lake.<sup class="reference" id="cite_ref-10" style="line-height:1em;"> </sup></p>
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<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;">It is reported that the average rainfall at Powai is about 2,540 centimetres (1,000 in), and the lake overflows for about for sixty days each year. The overflow from the lake flows into the [http://en.wikipedia.org/wiki/Mithi_River Mithi River]. Silt studies conducted in 1995 estimates that 4500 lakh cubic metres of silt has been deposited in the lake since its construction. It supplied two million gallons of water to Bombay (now Mumbai) when it was built. Following the construction of the [http://en.wikipedia.org/wiki/Tansa_dam Tansa dam] and creation of the reservoir, in 1892, Powai waters were used for irrigation. The lake drains a catchment of 6.61 km<sup style="line-height:1em;">2</sup> (part of the Powai-Kanheri hill ranges which also drain into the adjoining [http://en.wikipedia.org/wiki/Vihar_Lake Vihar Lake] and [http://en.wikipedia.org/wiki/Tulsi_Lake Tulsi Lake]). The dam, built in stone masonry has a height varying from 3 m to 6m with top level of the dam kept at E.L. 58.5 m (with Town hall datum). Government of [http://en.wikipedia.org/wiki/Maharashtra Maharashtra] reports that due to [http://en.wikipedia.org/wiki/Eutrophication eutrophication] of the lake water from untreated sewage and garbage from nearby residential and slum colonies, the lake water is unfit for drinking water use. Hence, the lake is now used for recreation, gardening, cattle washing and fishing. The water of the lake is also supplied to [http://en.wikipedia.org/wiki/Aarey Aarey] colony and [http://en.wikipedia.org/wiki/Larsen_%26_Toubro Larsen & Toubro] for non domestic uses.[http://en.wikipedia.org/wiki/Dissolved_Oxygen Dissolved Oxygen] (DO) level at the bottom of the lake is reported to be 0.71 mg/litre and at surface 4.11 mg/litre, average value of pH is 7.2 and COD is 42.70 mg/litre on the surface and 119 mg/litre at the bottom of the lake.<sup class="reference" id="cite_ref-10" style="line-height:1em;"> </sup></p>
   
 
=='''Lake Rejuvenation'''==
 
=='''Lake Rejuvenation'''==
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