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Seminar on
Impact of Urbanization on the Diminution of Lakes
for Recreational PurposesA Case Study of Hesaraghatta Reservoir
Presented ByRekha H.V
Research ScholarDepartment of Geography,
University of Mysore
Guided ByDr. Asima Nusrath
Associate professor,Department of Geography,
University of MysoreMysore
Presented on 24th February 2012
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Introduction
Sir K Seshadri Iyyer, the then Dewan oferstwhile Mysore province thought of
providing water supply to Bangalorethrough a source of perennial characterby building a reservoir across riverArkavathi which could store three years,supply to the city. In accordance with theabove, the first scheme of protected
water supply Chamarajendra waterworks was undertaken in the year 1894,the source of supply being Hessaraghattalake on the Arkavathi river.
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The area of the lake is 1620 hectors now.The Hesaraghatta lake has a great historybehind it. When the Europeans saw it for
the first time they were really impressedwith its beauty and started hostingNational Games such as swimming,paddling, rowing, cycling, boating andfishing etc. and it is a famous shootingspot.
Recreational Activities
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Statement of the problem
1. The water availability in the tanks and reservoir are influence
2. Hydro meteorological phenomena
3. The extent of the catchment area.
4. Siltation.
5. Physical system of the catchment (Geology, structures, landform,slope, soil, and land use / land cover).
6. Because of Urbanization, Industrialization and Deforestation
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Study Area
Study area situated about 23 kms
northwest of the Bangalore City andis drained by the river Arkavathy.
The catchment extends up to
Dodballapur, A part of Devanahalli,
and North part of Bangalore North
District. The catchments cover an
area of 564.64 sq km. and is coveredin the Survey of India toposheet Nos.
57 G/7, G/8, G/11, G/12, The area lies
between 130 North latitude to 130 30
North latitude and 77o 15 to 77o 45
East longitude.
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Assessing the hydro meteorological conditions on the reservoir
Assessing the impact of urbanization on Hesraghatta reservoir
Assessing impact of reservoir on recreational activities
Objectives
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Methodology
1. Secondary data collectedthrough the variousdepartment(Meteorological,
satellite data)2. Primary data collected troughthe questionnaire and personalinterview
Data collection Analysis
1. Using statistical techniquemeteorological data and primarydata analyzed (Excel graphs)
2. Using Erdas imagine supervisedclassification and changedetection are performed
3. Drainage map created from GISsoftware
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0
500
1000
1500
2000
2500
3000
1975 1980 1985 1990 1995 2000 2005 2010 2015
RainfallinMM
Years
Hesaraghatta Rainfall data from 1981-2001
Series1
RAINFALL CONDITION OF THE STUDY AREA
Hydro Meteorological Conditions
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0
200
400
600
800
1000
1200
1400
1970 1980 1990 2000 2010 2020
Inflowi
nMCFT
Years
Inflow of Water to Hesaraghatta Tank Since 1975
Seri
TRENDS OF WATER INFLOW TO HESARAGHATTA RESERVOIR
INLETS of hesaraghatta lake : -Nandi hill-Ardeshhalli Lake Marsandra
kodatur Lake kakol Lake Hesaraghatta
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0
200
400
600
800
1000
1200
1400
1600
1980 1985 1990 1995 2000 2005
RainfallinMM
Years
Anual Rainfall of the Catchment Area
Bangalore North
Dodballapur
Devenahalli
Rainfall conditions of the study area
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0
100
200
300
400
500
600
1 2 3Series1 45.455 105 505.77
Depth of Waterin mts
Years
Depth of Water Table Below Ground Level 1980-2011
Ground Water Level
Years
Number Of
Bore Wells2000 2084
2004 4087
2008 6871
2011 11050
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Impact Of Urbanization On The River Drying
Bangalore is a fastest growing city of India. Due to the urbanization
population increased. It needs more lands for residential, industrial,
recreational purposes. For that Bangalore is loosing its Green Belt region, in
green belt region some of the educational buildings residential sectors are exist
Using statistical technique population growth rate has been calculated and
maps have been created, and in Erdas software supervised classification
technique is used to now the deforestation and urban development area in thestudy area. Primary data also used to know the changes in the ground
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Remote Sensing Analysis For Changing Landuse And Land Cover
1989 1994
1999
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Agricultural, grass, scrubs land
Settlements
Built up area
Water body
Thick vegetation
Dry land
Plantation
Impact of Urbanization
2000
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Agricultural, grass, scrubs land
Settlements
Built up area
Water body
Thick vegetation
Dry land
Plantation
2006
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Increasing land use
Decreasing land use
No change
Land use and land cover change from 2000-2006
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Changing Land use and Land cover
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INCREASING POPULATION
a. Demand for land, water
URBANIZATIONa. Demand for land, water
INDUSTRIALIZATIONa. Demand for land, water
DEFORESTATION
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IMPACT OF RESERVOIR ON RECREATIONAL ACTIVITIES
HONORING THE WINNERS IN BOAT RACE
Picnic spot for Bangalorian
Its famous shooting spot
Europeans started
swimming rowing fishing cyclingBoating
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When the reservoir is full festivals are celebratedFrom the last 7 years the villagers not celebrated the fairs because there is no water
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Total No. ofrespondents
Impact ofurbanization
Impact ofindustrialize
Impact ofdeforestation
Overexploitation ofground water
184 168 134 109 80
Most of the respondents accepted that urbanization, industrialization,exploitation of grown water and deforestation is the causes for drying of thereservoir
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Conclusiong
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Bangalore is a fastest growing city of India. Due to the urbanization, it
needs more lands for residential, industrial, recreational purposes.
Problem is more in case of surface water due to the urbanization and in
case of ground water it is over exploited and recharging is not going
properly. This leads to drying of Arkavathy River.
Without water in the reservoir most of the recreational activities stopped
Conclusiong
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Creating awareness among the public (especially, those within the catchment,on the importance of water conservation and conjunctive utilization of surface
water and groundwater;
Considering the entire catchment as conservation zone, and adopting suitableland utilization strategy there in, especially from the point of view regulating theurbanization/industrialization;
Declaring a zone of about 10 km. Radius around the Hessaraghatta reservoir
Regulating a buffer of around 2 km on either side of the streams
Recommendations