Hesaraghatta Lake

Coordinates: 13°09′N 77°29′E / 13.15°N 77.49°E / 13.15; 77.49
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Hesaraghatta Lake
Bengaluru
, KA-52

Hesaraghatta Lake is a humanmade reservoir located 18 km to the north-west of

Mysuru, M. C. Hutchins, planned to build the scheme called the "Chamarajendra Water Works" to store a three-years' water supply to the city.[1][2]

Access

The lake is approachable by road from Bengaluru at a distance of 26.5 km to the north-west of the city.[3]

Topography

The total catchment area draining into the Lake at the dam built on the

Chikkaballapur district and joins the River Kaveri at Kanakapura after flowing through Kolar District and Bangalore Rural district.[4][5] The Vrishabhavati and the Suvarnamukhi are the tributaries which drain part of Bengaluru and Anekal Taluk respectively into the Arkavati River. The catchment receives a mean annual rainfall of 859.6 mm.[6]

Hydrology and water works

Pumphouse

The

Thippagondanahalli
(TG Halli) built during the years 1894 and 1933 respectively. The Hesaraghatta dam is an earthen bund of 1,690 m (5,540 ft) with a total height of 40.55 m (133.0 ft) creating the Hesaraghatta Lake (reservoir) with storage of 997 M.Cft at full reservoir level with a lake surface area of 450 hectares (1,100 acres). Water from the reservoir is taken through initially a 1.4 m dia (42" dia) Hume pipe to the Soladevanahalli Pumping Station by gravity and then pumped (using steam pumps initially and later changed to electric pumps at Soladevanahalli) against a head of 115 to 135 m to the Combined Jewel Filters (CJF) plant at
Malleswaram for treatment and supply to the consumers in the city.[3][7]

Hesarghatta Lake Pump House

When the Hesaraghatta Lake started drying up in the year 1925, as an urgent remedial measure, another dam was built to create a reservoir called the Chamaraja Sagar at TG Halli, downstream of the Hesaraghatta Lake. This dam has been enlarged from time to time, over the years, to meet partially, the increasing water supply demand of Bengaluru.[8]

Deterioration of the lake

Hesaraghatta Lake (7 Sept 2017)

The reservoir is reported to have filled up last in the year 1994 and thereafter the lake's deterioration and drying up started, reducing its reliability as a water supply source.[9]

The reasons attributed to the lake's drying up are erosion in the catchment and consequent capacity shrinking due to continuous silting. As of January 2020, the lake is completely dry.[10]

In recent years, the Hesaraghatta Lake bed has seen an increased number of bird photographers who drive on the lake bed using their cars and SUVs as hides resulting in extensive damage to the grassland habitat. This has increased the vehicle tracks to 43 km in total, with the average track width coming to 1.62 meters. About 136 hectares of habitat was either lost or disturbed because of vehicular movement. Unhygienic practices by villagers such as open defecation are also common. [11][12][13][14][15][16]

Main factors affecting degradation include sand mining, movement of tractors, tree plantations, and grazing of cattle.

Avifauna

White-throated Kingfisher in the Lake area

Even in the deteriorated condition of the lake, birds such as the

Aphnaeus lilacinus in South India.[17][18]

Call for restoration

Apart from the water supply, the lake, which was known for its birds and river rafting (wind surfing), has drawn the attention of public spirited organisations and individuals for undertaking restoration works to revive it.[10]

  • The Madras Engineer Group (MEG) of the Indian Army in association with local community organizations such as the "Arkavathy Kere Ulisi Andolana Samithi (AKASH)", which literally means "Save Arkavati Lake Movement" of Hesaraghatta and ‘‘Friends of Hesaraghatta Lake’’ undertook ‘shramadana’ (voluntary manual labour), in May 2004, to clear the main inlet to the lake. It is reported that this activity enabled increase of water storage in the lake which was stated to be 1.22–1.83 m (4.0–6.0 ft) of water in an area of about 66.7 hectares (165 acres). AKASH has now sought help of more volunteers to increase the depth of the lake to 3 m (9.8 ft) to attract several species of birds.[10]
Old aqueduct
  • The "OORU-NEERU" Water Walk was organised by the public spirited people of Bangalore to Hesaraghatta Lake to see and study the status of the Lake and evaluate the relationship of a city to its waters. The observation made by the study is that:

    It is more correct to refer to the Hesaraghatta reservoir as a ‘once upon a time’ water lifeline for Bengaluru rather than a current lifeline.

The walk has also brought out facts such as, a) presence of the reservoir and old pumps, b) the building of 1896 A.D. vintage which has maps displayed in a building depicting how the water was received and pumped, c) the water level chart of the Hesaraghatta reservoir till 2000 A.D, d)a rain gauge to measure the rainfall, e) the remnants of the brick aqueduct to convey water by gravity at Turbanahalli and f) the Siphon at the Hesaraghatta Lake used to discharge the flood waters when the reservoir was full. The final verdict of the Water Walkers is that:[19]

The Hesaraghatta reservoir has the capacity to supplement Bengaluru water requirements at a far cheaper cost than any other. It makes ecological and economic sense to look at its revival.

  • Another voluntary effort, the latest, is of the three member team of a villager, a photo journalist and an economist who found that the lake was being de-silted with bull dozers at the lake's eastern channel to connect it with the catchment area and which could bring water into the lake during the monsoon.[20]

Places of interest

The fertile area which encircles the Lake has a number of important institutions such as the Government

Protima Gauri in 1990.[18]

Gallery

  • Bay-backed shrike (Lanius vittatus)
    Bay-backed shrike (Lanius vittatus)
  • Common kestrel (Falco tinnunculus)
    Common kestrel (Falco tinnunculus)
  • Common myna (Acridotheres tristis)
    Common myna (Acridotheres tristis)
  • Cattle egrets (Bubulcus ibis)
    Cattle egrets (Bubulcus ibis)
  • Oriental Magpie-robin (Copsychus saularis)
    Oriental Magpie-robin (Copsychus saularis)
  • Indian pond heron (Ardeola grayii)
    Indian pond heron (Ardeola grayii)
  • Greater Coucal (Southern) (Centropus sinensis)
    Greater Coucal (Southern) (Centropus sinensis)
  • Little egret (Egretta garzetta)
    Little egret (Egretta garzetta)
  • Lilac Silverline (Aphnaeus lilacinus)
    Lilac Silverline (Aphnaeus lilacinus)
  • A male Rain Quail
    A male Rain Quail
  • Black-winged stilts

References

  1. ^ Water Supply and Source
  2. ^ "BWSSB.org". Archived from the original on 29 July 2018. Retrieved 17 October 2008.
  3. ^ a b http://www.geopassage.com/India/attraction/Bangalore/Hesarghatta.htm Archived 21 September 2020 at the Wayback Machine Hesarghatta
  4. ^ Board of Water supply Bangalore Archived 2007-08-18 at the Wayback Machine
  5. ^ Hesarghatta lake details
  6. ^ Envis Centre, Bangalore
  7. ^ Board of water supply bangalore
  8. ^ Water supply and source
  9. ^ from Lessons from a reservoir by S. Vishwanath
  10. ^ a b c Sights, sounds and smells from Bangalore: Army, AKASH revive Hesarghatta lake
  11. ^ "The Hesaraghatta Study". Archived from the original on 15 February 2013. Retrieved 18 February 2013.
  12. ^ "Ruining the ecology of Hesaraghatta Lake - The role of bird photographers" (PDF). Archived from the original (PDF) on 26 September 2013. Retrieved 18 February 2013.
  13. ^ Shutterbugs take over Hesaraghatta lake bed
  14. ^ Study reveals lensmen’s unethical practices
  15. ^ Nature paparazzi kill lake
  16. ^ Lensmen mess up bird habitat
  17. ^ My first birding trip – Hesarghatta
  18. ^ a b http://wgbis.ces.iisc.ernet.in/energy/lake2006/programme/programme/lake2006_Pdf/Harish%20Bhat_Tanks%20of%20North%20Bangalore.pdf Diversity at the Tanks of North BangaloreWater Bird Diversity at the Tanks of North Bangalore
  19. ^ Bangalore City project, Ooru Neeru : water walk
  20. ^ Saving Hesaraghatta, the saga of two rajas, one bhatta and a lake