By Prof. Mahesh D. Desai (Ph.D.), Visiting Professor, AMD, SVNIT, Surat. Consulting Engineer, EFGE...

By

Prof . Mahesh D. Desai (Ph.D.),

Visiting Professor, AMD, SVNIT, Surat.

Consulting Engineer, EFGE Consultant, Surat.

TRENDS, BOUNDARIES AND WATER

Water Resources of Next Decade - Projections for Gujarat:

Workshop on Ground Water Management and Water Use Efficiency in State of Gujarat, Union Territory of Daman & Div.

Chairman: B.N. Navalwala (Advisor to Chief Minister). Recommendation:Use of existing dam storages for recharging fast depleting aquifers in Gujarat.

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

Continue…

Study: a) Underground storage potentials.b) Source of surplus water in basin.c) Inter basin transfer of resources for MAR- Managed Aquifer Recharge.d) Ground water quality surveillance. Projection & warning:Alarming decline in annual water availability in most parts of Gujarat to 400 m3/ capita for 2020. (Water level to minimum for scares condition is 2000 m3/capita/year)

Flood in Tapti around Surat spill on banks of river Tapti flooding sq.kms even with releases of 2 - 3 lakhs, can be harvested to by recharging aquifers.

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

Facts & Data available:

Ukai will have less inflow in next decade

Tapti Basin:

Total Ground Water Recharge Potential: 633.83 MCM / year

Usable Ground Water Recharge: 507.10 MCM / year

Usable Ground Water Recharge Withdrawal: 168.65 MCM / year

Balance of Ground Water: 338.45 MCM / year

(Source: G.W.S.S.B., Gandhinagar)

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

Saline Land Growth: 1 lakh hectare / year (Source: Bureau of Soil Survey & Use)1960 - 6.2 % Kharland, 1989 - 15.8 %Present - 27.17 % Salinity within 2 km belt on coastline: 3500 ppm (not suitable for irrigation & other uses) Surat District’s saline water area: Bardoli, Choryasi, Kamrej, Mahuva, Olpad, Palsana, Valod, Vyara Saurastra: Year 1957 to 2000 average annual rainfall: 250 – 380 mmYear 2001 rainfall: 455 mm

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

Conservation of Resources for Survival:

Source:Only flood water for South Gujarat & Narmada Canal for Central Gujarat Conservation of Flood:No storm drains for discharge to saline water i.e. river Tapti, Kim, Mindhola in lower reachesNetwork to intercept storm to pond (Flood Detention Reservoir) on Kahrland on coast (Combined coastal protection / highway)Recharge by bores in R.L. (-) 3 to (-) 15 m by wells / bores seepage to river ponds & weir storage.

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

Plate – 1 shows schematic diagram for Flood Water Conservation SchemePlate – 2 shows the Land Reclamation for Slum Rehabilitation

Sketch showing the sectional details for proposed Integrated planning with Coastal Highway & Flood Detention Reservoir

SEA

RIVER TAPI

CITYF.D.R.

H.T.L.(+) 5.5 m

L.T.L. 0.0 m

+ 8.0 m + 8.0 m

+ 13.0 m

+ 9.5 m

H.F.L.+ 12.0m

0.0 m

Spill/Road/

River FrontCoastal Highway

RIVER Front

Development

Storm drainbelow roadSurface drain

To Sena, TenaCreek & Kim River

Plate shows flood, spills, barrel direct drain to act as storm drains interceptor, surface drain network to divert flood water to

major khadies redeveloped, Tena, Sena, Kim, Mindhola.

+ 7.0 m

PLATE- 1

Ballon Spill way Recharging

+ 5.5 m

Sea

(-) 10.0 m

+ 8.0 m + 5.5 m

+2.0 m

(-) 4.0 m W.T.

KHAR LAND

R

O

A

D

S

E

A

LAND, +6.5

WATER +5.5

Desalination

• Excavation Lagoon

• Soil F.A. reclaiming Land…25 Million SQM

• Store & Recharge Water up to 100+20 million CM

PLATE- 2

MULTIPURPOSE PROJECT TO MAKE OPTIMIZATION OF WATER.

ROAD

GREEN BELTCOASTAL HIGHWAY

CITY

Flood Detention Reservoir with Ballon dam spillway:

Coastal Area of Hajira, Olpad. - Tena Sena Creek & Kim River

Coastal Area at Mouth of - Mindhola River

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

Flood Detention Reservoir- Mindhola River

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

Linking of Village Ponds (reserved) for no source villages

Pond

PondPond

River Tapti

FDR

FDR

Pond

Pond

Pond

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

NH-8.

Proposed Coastal HighwayEvacuation forHajira in Disaster

Proposed Coastal Highway with

Flood Detention Reservoir

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

Water Resources Day Resolution:

Disperse flood to wider area, Drain to FDR – Recharge aquifer & Conserve for future Source of usable water.

(DDRCS)

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

ACKNOWLEDGEMENT

Thanks to

The OrganizersThe Director, SVNIT

CWC

Ravin Tailor

THANK YOUTHANK YOU