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Faculty of Engineering
University of Jaffna

Site for Faculty of Engineering
Land Allocated for
Engineering Faculty

Approved Budget
Cost components Cost in
millions(LKR)
Buildings: Academic Departments - (20,0000 Sq.m) 1035.00
Buildings: Common facilities - (3050 Sq.m) 157.00
Buildings: Accommodation : (6750 Sq.m) 350.00
Equipment and Books 790.00
Furniture 105.00
Total 2437.00

Approved Cadre
(For first year Academic Programme.)
Positions Number
Senior Lecturers: 10
Teaching Assistants/Instructors 05
Technicians 01
Computer application Assistants 02
Laboratory Attendant 02
Other Supporting staff 09
Total 29

Department of Civil & Mechanical Engineering
From Government of India
Donated by
India

The Vision of the Faculty of Engineering
The Vision of the Faculty of Engineering is to be a well recognized
centre of Engineering education and research in Sri Lanka.
The Mission of the Faculty of Engineering
The Mission of the Faculty of Engineering is to produce resourceful
and skilful Engineers to enjoy global citizenship and pursue
professional career with advance learning and research relevant to
regional and national development.

Research Activities Planned
? Lagoon Development in Jaffna
? Water Management in Kilinochchi
? River Basin Development in Vanni
? Mini Hydropower Generation
? Appropriate Technology Development

Components of Jaffna Lagoon Scheme
? Northern Barrage at Thondamanaru
? Vadamarachchi Lagoon
? Bridge at Vallai of Vada. Lagoon
? Bridge at Chavakachcheri -Road
? Bridge at Thalayady - Pallai Road
? Some Flood Bund in Lower Places
? Elephant pass lagoon Chundi kulam Spill Cum Causeway
? Elephant pass Peripheral Channel
? Link Canal
? Elephant pass Bridge (already closed)
? Some flood Bund in lower places

Components of Jaffna Lagoon Scheme (Cont.)
? Upparu Lagoon
? Ariyalai Barrage
? Separation Bund at Kappoothu
? Flood Bunds in Low Places
? Bridge at Koppay �C Kaithady Road
? Bridge at Madduvil �C Puththoor Road
? Valukaiaru Lagoon
? Arali Barrage
? Cluster of ponds

Problems
Un controlled pumping and no planning for recharge of ground
water is causing severe threat to the ground water potential as
well as quality of water in Jaffna peninsula
Due to the non maintenance of the salt water exclusion system
in Jaffna peninsula, sea water intrusion has taken place in to the
land area
Many thousands of acres of fertile land has become saline and
abandoned with out cultivation in Jaffna peninsula
Many hundreds of dug wells have also been abandoned due to
salinity

History and Proposal of JL Scheme
1879--- Mr. Twyneham GA, NP, has proposed Damming the sea water from entering to
the lagoons �C - Given up due to big flood disaster
1913--- Mr. Fesling GA, NP, Took it up the proposal and given up
1916---Mr.Horesburg started the part of the project, Blocked the Culverts across Point
pedro �C Chavakachcheri road �C It was functioning well from 1920 to 1923
1942--- Mr.Webb proposal came up �C Thonadamanaru Barrage Constructed
1947 �C 1953, Ariyalai Barrage constructed -1955
1962--- Eng.S.Arumugam has proposed converting Elephentpass lagoon and
Vadamarachchi lagoon in to Fresh water lakes to accelerate the leaching process.
(Map 2)
It got failed �C because
? Sea water seepage through Kandy Jaffna road bridge
? Damage of Eastern closure bund due to the settlement of subsoil below the bund

Proposal from Irrigation Department in 1976
? Eastern closure bund of Elephant pass lagoon of 4700ft with the spill cum causeway of
7000 ft.
? Access road of 6 miles also planned to be improved
? Link canal of 2.5 miles with regulator
? Imp.to Thondamanaru Gates
? Repairs to Ariyalali Barrage Gates
? Separation Bund at Kaputhu
? Imp. to all Flood bunds
Benefits were anticipated
? Reclaiming 11,000.00acs of non arable land
? Supplement 20,000.00acs of rain fed cultivated land for good
? and assured yield
? Ground water improvements in the peninsula
? Livestock improvements in the lagoon surrounding area

Jaffna Lagoon Scheme �C Objective, Details and Benefits �C
Prof.V.Navaratnarajah ( Presentation Held in 1993)
He has developed ;
History
Water Balance of peninsula
Components of the JL Scheme,
In 1969, the people of Vadamarachchi, were able to do
cultivation from lagoon water, and getting benefits of
good Ground water table.
Benefits,
1. Additional cultivation for cash crops and paddy cultivation
2. Receiving good water for their Consumption
3. Fresh water Fishing
4. Development of livestock by having good pasture land
All the Benefits were given in figures and highly recommended the
project Implementation.

Upparu project �C K.E.Kumarasamy
He has mentioned in his report,
Effort of Mr. K.Balasingam, to bring the Mahawali water to
Jaffna Lagoon through Kanagarayan Aru in 1940
Webb proposals were implemented by the effort of
Mr.T.Murugesampillai AGA, during 1948-1955, and the
Positive impacts were;
1. Karanawai and its surroundings were became good water area
2. Avarangal tharavai became fertile cultivable area
3. Very good response from the people of that area for the expansion
of the project
Negative impacts were;
1. Salt harvesting has failed in Karanawai
2. Prawn cultivation also failed
The system has failed, due to
No proper maintenance
Result of negative impacts
He further stated the several efforts made by the Jaffna people,
to set up the Jaffna lagoon scheme in place.

Land and Water development of Jaffna peninsula- Eng.M.Ratnam
He has mentioned in his report, History of Jaffna and JL scheme.
Water balance of Jaffna peninsula,
Requirement of the people
(25Gal/capita)
20,000 Acft
Req.for cultivation
(40,000 * 2 acft)
80,000 Acft
Losses 10,000 Acft
50% of additional req to cater for the dry year 55,000
Total 165,000 Acft
48�� of rain fall will pro in 50 sq mile of centre portion of Jaffna
(1/3 will go to the savings)
42,000acft
Conversion of lagoon in to Fresh water lakes 40,000.Acft
By renovating Ponds, lakes, and drains 10,000
Short fall of 60,000, to 75,000 acft of water could be saved
by having
Converting Jaffna lagoon into Fresh water lake
Rain water harvesting
Making barriers of fresh water flows to the sea in keerimali and some area

Thondamanaru Fresh Water scheme and its benefits- S.E.Joseph
It was mainly related with fishing, he has divided the
Vadamarachi lag into 4 sectors and analysed the fish production
with family details (Map 4)
Suggestion to have some portion for fishing in Thondamaru to
Vallai
To have barrage at mullipalam to have 5 ft of fresh water from
mathurankeny to Mullipalam.
Land Use of Upparu, Elephent pass lagoon and adjoining area �C
Prof. S.Balachndran ( Geographical section, Jaffna university),
Mr.K. Rajendram, & Mr.S.T.Rajasooriyar
Land area were divided into 6zones and usage was analysed
Highly recommended the project for agricultural activities
(Map 5)

Agricultural usage of the surrounding area of Jaffna Lagoon-
Dr.A.C.Vivehananthan, DD, Agriculture research, Northern region
Height of the land area in Jaffna, varies from 0-15M in
respect of MSL (map 001)
He has analysed in his report, the dependability of
Agriculture and fish farming, in related with
physical conditions of the area.
Reasons for salinity and recommendation for avoiding or
improving salinity condition for the purpose of
agriculture

Recommendation for the protection in spreading
salinity from the adjoining salt water area
? Providing contour Bunds and creating good land area for cultivation
? Deep ploughing before the dry condition of the land area, will avoid capillary
continuity.
? Creating agro forestry will act as wind belt for the protection of the land area
from spreading salt dust
? Salt water exclusion Bund
Recommendation for the reduction of salinity in the land
area
? Providing side drains and constructing bund across the slope and allowing
the water to drain through the ground
? Encourage growing MARSH PLANTS to absorb salt from the ground
? Growing salt resistant varieties of plants
? Usage of Organic fertilizer in bulk

Jaffna lagoon Scheme with Fishing and Fish related Cultivation-
Mr.K Sithravaivelu, Jaffna University, and K Selvavinayagam
They started with history of JL scheme
They analysed the positive and negative impacts in related
with fishing
? 528 Met.Tonne fish and fish related items could be produced in
Vadamarachchi lagoon and it is 9.3% of Northern Production (1983Data)
? 114Tonne of Prawn and its related items could be produced in Vada.
Lagoon . it is 0.1% of the production of NP
? Some poor people specially women will loos e their income but they could
be replaced with very attractive income by having fresh water fish
cultivation
? Fresh water fishing, Floating Net fish cultivation, Prawn cultivation, Pay
fishery sport fishing could be encouraged in the fresh water area
? Since they proved the positive impact was very much more
than the negative impact, it was highly recommended

Tondamanaru Lagoon Development for profitable sea cultivation-
Mr. Veerakulasingham, Polikandi, Valveddithurai
He was totally disagreeing for the construction
of barrage and converting the salt water in to
fresh water
He stated that the salt content in some well water
was increased from 8.6 % to 27.2 % ( But his
facts and figures ware contradicting with others)
He has proposed totally a different proposal.
(Map 6)

Sea related benefits of Elephent pass lagoon-
K.A.Stanislas, Kaddaikkadu, Mulliyan
? Elephent pass lagoon is having 14mile in length, 2 to 5miles width area.
During October �C December, sea water intrusion takes place in to the lagoon
During December.- February, rain water of 400 sq.mile, flush into the EP
lagoon, and excess water pass it to sea through Chundikulam.
Northern and southern sections of the EP lagoon, is with Kandal, Kanna,
Potpaththai (Type of mangroves). These mangroves are very much useful to
natural prawn cultivation as well as bird sanctuary.
During these water transaction, lot of Prawns, fishes, crabs, and cuttlefish
gets into the lagoon
2000 families are benefited with the salt water lagoon
He was suggesting to improve the lagoon to suit the requirements of the
Jaffna lagoon
(Map 7)

? Existing Features
Thondamanaru Barrage
Total length 628ft
Ariyalai barrage
540ft length
No of upper gates 18
Size 20ft*4ft
Sill 0
No of Gates 42
Size 5.5ft* 5.0ft
Sill -1.0MSL - Crest +4.0MSL
No of lower gates 13
Size 20ft * 3ft
Sill -3
No of subsidiary sp gates 16
Size 20ft * 2ft
Sill +2
Tot.Area of Jaffna 400 sq.ml
Vad lagoon area 30 sq.ml
Upparu lag.area 10 sq.ml
EP lagoon area 40sq.ml
Catchment area of Vad.Lagoon
Tot.Area of Jaffna
115sq ml
Catchment area of Upparu 85sq.mls
Catchment area of EP 363sq.ml

Further studies and final investigations
Section of the peripheral bund ( it is advisable to have clay core and rock fill
bund to function as spill cum bund)
Width and discharge of the two peripheral channels and channel leads to Vad.
Lagoon have to be decided ( 5000 cusecs and 250 to 300 ft BW)
Is the opening of EP Bridge to be reopened to discharge the flood water �C
western portion to the sea
Is it possible to issue water from the Iranaimadu tank to supplement drainage
water, when it is not enough to cater the nominal demand of water to
Vad.Lagoon

Need for Research
? Lot of data were collected and investigations
completed and it was available in Irrigation
Department in early eightees. But now it is not
available for our reference
? We have to start collecting data to
scientifically proof after research the actual
improvement and development needed to all the
lagoons in Jaffna peninsula in future to address
the salinity intrusion problem.

Research uo j_foe_jaffna lagoons

Data Collection Needed
? Sixty data collection points to be introduced
�C Thondamanaru lagoon �C 30 points (Ten points along the lagoon and three each
perpendicular to that in 300 m interval)
�C Upparu lagoon �C 18 points (six points along the lagoon and three each
�C Valukaiaru lagoon �C 12 points (four points along the lagoon and three each
The location to be fixed with coordinates and mapped
? Data to be collected monthly
? Water level
? Salinity
? Ph
? Electrical conductivity

sssiva100@yahoo.com
0772508730

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Research uo j_foe_jaffna lagoons

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