Date post: | 04-Jun-2018 |
Category: |
Documents |
Upload: | jp1mennakanti |
View: | 221 times |
Download: | 0 times |
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 1/35
CONSERVATION OF URBAN LAKES IN
HYDERABAD METROPOLITAN AREA
Jayesh Ranjan IASVice-Chairman, HUDA
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 2/35
Hyderabad - Profile
Located between 17°21' - 17°71' NLatitude and between 78° 21' -
78°76'E Longitude with an average
altitude of 560 m above MSL.
Hyderabad Metropolitan Area comprises 8500 sq. km.
Topography – Rocky, undulating with gentle slopes,red gravely soils
Tropical climate with annual rainfall of 800 mm (under
semi-arid)
Decadal growth rate - 37 %
Ranked 6th in population among the metropolitancities in India.
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 3/35
HYDERABAD URBAN DEVELOPMENT AUTHORITY
The Authority is constituted
in1975 under Urban areas(development) act 1975.
HUDA is a statutory Planning
Authority to develop MasterPlan for planned developmentand controlled growth ofurban areas.
To plan for a sustainable development of Hyderabad urbanagglomeration.
To develop policy framework, zoning regulations and land use
plan.
To plan and implement infrastructure facilities like roadnetwork and overall transportation plan.
To plan for sustainable environmental management.
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 4/35
LAKES OF HYDERABAD
About 400 big & small
lakes in HUDA area.
169 lakes notified by
HUDA for protection
and conservation of
water spread area withno activity in 30 m
buffer around the
water bodies.
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 5/35
INDIA
Andhra Pradesh
URBAN LAKES – DRAINAGE MAP
India
Hyderabad Urban Development Authority
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 6/35
Hydrological regime & role of urban lakes
Urbanization has led toloss of water bodiesresulting in increased
runoff
Lakes contribute
significant additionalrecharge to the groundwater regime due toinfiltration
Over-exploitation ofground water due to
urbanization leads to rapiddepletion of ground waterlevel
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 7/35
Hydrological regime & role of lakes
During the past few yearsthere is a fall in water level of
1-2 m per year all over theCity
Polluted water body causing unhygienic and healthhazards for lake neighborhood.
The worst ground water scenario is experiencedby apartment complexes
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 8/35
Problems faced by urban lakes
Tampering inflow &
outflow channels.
Urbanization.
Change of land use.
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 9/35
Washing clothes
Cattle Wash
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 11/35
Invasive weed - throttlingthe lake ecosystem
Inappropriate shoreline
development
(Encroachments)
Pollution due to Idol
Immersion
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 12/35
Need for restoration of urban lakes
To harvest the preciousrainwater and augment shortfall
in water supply needs of
Hyderabad
To moderate the flood risk by
interconnecting the lakes
To utilize the wastewater by
treatment process during the dry
weather and maintain lake water
balance
To improve the scope for
recharge of ground water withinthe influence zone of the lakes
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 13/35
Need for restoration of urban lakes
To improve the health conditionsof people living in the lake
surroundings.
To enhance the biodiversity in
and around the lakes.
To induce recycling and reuse of
wastewater after treatment for
non-potable uses for gardening
and industrial purpose.
Develop local economy through
eco-tourism activit ies at lakes.
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 14/35
HUDA has taken up the task of restoration of lakes in the
Hyderabad Metropolitan area to conserve the water bodies and toincrease the ground water table with clean water.
In the first phase, out of 169 large water bodies notified, 87 lakes
are being taken up under Green Hyderabad EnvironmentProgramme (GHEP) from 2004 onwards
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 15/35
Categorization of lakes for development
• Category – I (more polluted) - 18 nos
• Category – II (moderately polluted) - 69 nos
These lakes are categorized based on certain criteria like
degree of pollution, size of the lake, proximity to habitation,etc.
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 16/35
Baseline Work
Detailed survey of the lake and its surroundings and preparation
of the lake plan.
Bathymetry of the lake for area - volume of the lake.
Database on watershed and the ground water quality and water
table in all seasons.
Preparation of the Catchment area plans.
The flow measurements of all incoming dry weather flows andoutflows of the lake
The flow measurements of all incoming wet weather flows and
outflows of the lake.
Daily lake water level recordings.
Pan evaporation data from the Meteorological dept.
Rainfall data from the Meteorological dept. for calculating the
storm water runoff from the catchment area into the lake.
Cont..
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 17/35
Baseline Work
Dry weather flows for the projected population for the year 2031
is calculated by using census data.
The capacity of Sewerage Treatment Plant is fixed based on the
quantity of minimum flow required into the lake to maintain its
water balance which is equal to the maximum water loss due toevaporation and percolation under no outflow condition during
the dry season when the evaporation is highest.
Water quality analysis of inflow, lake water and outflow of thelake for all parameters such as BOD, COD, DO, Total Nitrogen,
Total Phosphorus and trace metals etc.
The sediment analysis of the lakebed in different layers
depending up on the nutrient values in the sediment.
Socio economic study of the lake surroundings for identification
of direct and indirect dependents within the vicinity of the lakes.
Biodiversity study of the lake for compiling on the currentbiodiversity.
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 18/35
Restoration works at lakes
Category - I
Formation of peripheral bund
along the shore line of the lake Desilting the lakebed by dredging
Strengthening and widening of
main bund Restoration of surplus weirs and
sluices
Construction of STP for treatingthe raw sewage and letting the
treated water into the lake to
maintain the lake water to the
desired level
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 19/35
Restoration of inflow and
outflow channels
Diversion of excess
sewage by layingpipelines.
Beautification of lakebunds and periphery with
landscaping and
plantation.
Restoration works at lakes
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 20/35
Restoration works at lakes
Category - II
Formation of peripheral
bund along the shore line of
the lake
Desilting the lakebed by
dredging
Strengthening and widening
of main bund
Restoration of surplus weirsand sluices
Restoration of inflow and
outflow channels
Plantation on Lake bunds
f S
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 21/35
Process Details of The STP
Interception, diversion and collection of sewage
Screening of floating matter & grit
De-Nitrification (Biological process)
Extended Aeration with fine pore diffused membrane
Flocculation with Alum dosing for phosphorusremoval
Settling by Plate Settlers
Chlorination & Filtration
Clear treated effluent to wetland where special type of
plants viz. cattails and bullrush are planted for
removal of further phosphates and nitrates
Tertiar Treatment Process
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 22/35
Tertiary Treatment Process
Wetland
Lake
Raw sewage
A Vi f th STP
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 23/35
A View of the STP
DN Tank
Aeration
Flocculation tankPlate settlers
Pressure filter
Sludge drying beds
Power room
Lab
R t ti f S fil d L k
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 24/35
Restoration of Safilguda Lake
Before Intervention
After Intervention
R t ti f L h L k
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 25/35
Restoration of Langerhouse Lake
Before intervention
After intervention
A Vi f S L k
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 26/35
A View of Saroornagar Lake
Description BOD COD DO TKN Total P
Lake Water Before Intervention 65.00 212.00 3.40 14.00 5.87
Lake Water After Intervention 25 92 6.2 9 1
Stan d ar d s <10 <50 >5 <5 <1
A Vie of Langerho se Lake
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 27/35
A View of Langerhouse Lake
Description BOD COD DO TKN Total P
Lake Water Before Intervention 120.00 270.00 0.40 29.00 5.22
Lake Water After Intervention 14.00 32.00 5.40 4.15 0.80
Stan d ar d s <10 <50 >5 <5 <1
A view of Pedda Cheruvu Nacharam
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 28/35
Description BOD COD DO TKN Total P
Lake Water Before Intervention 82.00 370.00 0.40 29.00 5.60
Lake Water After Intervention 16.00 42.00 5.60 6.15 1.20
Stan dar ds <10 <50 >5 <5 <1
A view of Pedda Cheruvu, Nacharam
A view of Resident friendly STPs
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 29/35
A view of Resident friendly STPs
Mir Alam Tank
Saroornagar Lake
Biological Treatment Facil ity
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 30/35
Trees, Bamboo and ground
cover helps in increasing the
Bio-diversity as well as selfpurif ication by absorption of
phosphates and Nitrates
Floating macrophytes likepistia and duckweed help in
removal of inorganic
Nitrogen and Phosphorus in
the wetland
Biological Treatment Facil ity
Lake Landscapes
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 31/35
Lake Landscapes
Provides enhanced
aesthetics to the lakes.
Increases opportunity
for gainful employmentthrough eco-tourism
Bio diversity of Restored Lake
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 32/35
Exclusive Bird Island
created at Safilguda
Lake
Rich faunal and floralBio-diversity in the
midst of the city
Bio-diversity of Restored Lake
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 33/35
A Paradise for Birds in themidst of urban built-up area
Lake eco-system and
wetland contribute a lot
to the bio-diversity
OUTCOME : SOCIO ECONOMIC BENEFITS
8/13/2019 PL-6 Jayesh Ranjan
http://slidepdf.com/reader/full/pl-6-jayesh-ranjan 34/35
Improvement in the Lake water quality
from Hyper-eutrophic condition toMesotrophic condition
Increase the Biodiversity of the Lake
Increase in pisciculture activities
Employment generation by Eco-tourism
activity
Increase in recreational facilities andwater sports.
Improvement in the groundwater quality
Improvement in human health of lakesurround
Improved aesthetics
Enhancement of property values in thelake surroundings
OUTCOME : SOCIO-ECONOMIC BENEFITS