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ENGINEER
ENGINEER
JOURNAL JOURNAL OF OF THE THE OF INSTITUTION THE INSTITUTION OF OF ENGINEERS, OF ENGINEERS, SRI SRI LANKA
SRI LANKA
EDITORIAL EDITORIAL BOARD
BOARD
Eng. Eng. JOURNAL (Prof.) Eng. (Prof.) (Prof.) A. OF A. K. THE K. W. A. INSTITUTION W. K. Jayawardane
W. Jayawardane OF ENGINEERS, SRI LANKA
Eng. Eng. Priyal Eng. Priyal Priyal De De Silva Silva De Silva
Eng. Eng. W. Eng. W. T. T. R. W. R. De T. De Silva R. Silva De Silva
Eng. EDITORIAL Eng. (Prof.) Eng. (Prof.) (Prof.) K. K. P. P. K. P. Pathirana P. Pathirana BOARD
P. Pathirana - Editor - Editor - Editor Transactions
Transactions
Eng. Eng. (Prof.) Eng. (Prof.) (Prof.) (Mrs.) (Mrs.) N. N. Rathnayaka
N. Rathnayaka
Eng. Eng. (Prof.) Eng. (Prof.) (Prof.) T. A. T. M. M. K. Pallewatta T. W. Pallewatta M. Jayawardane
Pallewatta - Editor - Editor - Editor “ENGINEER”
“ENGINEER”
Eng. Eng. (Dr.) Eng. Priyal (Dr.) D. (Dr.) D. A. De A. R. D. Silva R. Dolage A. Dolage R. Dolage
Eng. Eng. E Eng. W W. E W Karunarathna
T. E Karunarathna
W R. Karunarathna
De Silva
Eng. Eng. (Miss.) Eng. (Prof.) (Miss.) (Miss.) Arundathi K. Arundathi P. Arundathi P. Pathirana Wimalasuriya
Wimalasuriya - Editor Transactions
Eng. Eng. M. Eng. (Prof.) M. L. L. Weerasinghe M. Weerasinghe (Mrs.) L. Weerasinghe N. Rathnayaka - Editor - Editor - Editor “SLEN”
“SLEN”
Eng. Eng. (Dr.) Eng. (Prof.) (Dr.) K. (Dr.) K. S. T. Wanniarachchi
S. K. M. Wanniarachchi
S. Pallewatta Wanniarachchi - Editor “ENGINEER”
Eng. (Dr.) D. A. R. Dolage
Eng. E W Karunarathna
The The Eng. Institution The Institution (Miss.) Institution Arundathi of of Engineers, of Wimalasuriya
Engineers, Sri Sri Lanka Sri Lanka Lanka
120/15, Eng. 120/15, M. Wijerama L. Wijerama Weerasinghe Wijerama Mawatha,
Mawatha, - Editor “SLEN”
Colombo Eng. Colombo (Dr.) - 00700 K. - 00700 S. - Wanniarachchi
00700
Sri Sri Lanka. Sri Lanka. Lanka.
The Institution of Engineers, Sri Lanka
Telephone: Telephone: 94-11-2698426, 94-11-2698426, 2685490, 2685490, 2699210
2699210
120/15, Wijerama Mawatha,
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Sri Lanka, Sri Lanka, unless unless expressly expressly stated.
stated.
COVER COVER PAGE
PAGE
COVER PAGE
ENGINEER
The statements made or opinions expressed in the
“Engineer” do not necessarily reflect the views of the
Council or a Committee of the Institution of
Engineers Sri Lanka, unless expressly stated.
Southern Southern Expressway
Expressway
Recently Recently commissioned commissioned first first stage first stage stage of of the of the four the four four lane lane lane
Southern Southern Expressway Expressway connects connects Colombo Colombo with with with the the the
southern southern city city of city of Galle of Galle Galle through through eight eight eight interchanges.
interchanges.
Constructed Constructed for for a design a for design a design speed speed speed of of 120 120 of km/h, 120 km/h, km/h, this this four this four lane four lane lane
dual Southern dual carriageway dual carriageway Expressway stage stage one stage one has one has cost has cost over cost over Rs. over Rs. 500 Rs. 500 million 500 million million
per per Recently kilometer. per kilometer. commissioned Spanning Spanning close first close close to stage to 100 100 to of km, 100 km, the this km, this four super this super lane super
highway Southern highway allows Expressway allows a terminal a terminal a terminal transit connects transit transit time time Colombo of time of one one of hour one hour with at hour at 100 100 the at 100
km/h, southern km/h, which which city is the is the of upper is the upper Galle upper speed speed through speed limit. limit. limit. eight interchanges.
Constructed for a design speed of 120 km/h, this four lane
dual carriageway stage one has cost over Rs. 500 million
Courtesy per Courtesy kilometer. of: of: of: Spanning close to 100 km, this super
highway allows a terminal transit time of one hour at 100
Eng. Eng. km/h, Sarath Eng. Sarath which Sarath Weerasinghe is Weerasinghe the upper & & speed & limit.
Eng. Eng. J. Eng. A. J. A. G. J. G. R. A. R. Jayalath G. Jayalath R. Jayalath
Road Road Development Road Development Authority
Authority
Courtesy of:
Eng. Sarath Weerasinghe &
Eng. J. A. G. R. Jayalath
Road Development Authority
CONTENTS
CONTENTS
Vol.: Vol.: XXXXV, Vol.: XXXXV, No. No. 01, No. 01, January 01, January January 2012 2012 2012
ISSN ISSN 1800-1122
1800-1122
CONTENTS
From From the the Editor the Editor Editor ... ... ... III III III III
SECTION SECTION I I I Vol.: XXXXV, No. 01, January 2012
ISSN 1800-1122
Using Using SWMM SWMM as as a Tool a as Tool a Tool for for Floodplain for Floodplain 01
Management From Management the Editor in in Ungauged ... Ungauged in Ungauged Urban Urban Watershed
Watershed III
by by : S by : S Wanniarachchi S : S Wanniarachchi S Wanniarachchi and and Eng. and Eng. Eng. (Prof.) (Prof.) N N T T S N S T S
Wijesekera
SECTION
Wijesekera
I
Tensile Using
Tensile Properties
SWMM
Properties
as
and
a
and
Tool
Volumetric and Volumetric
for
Volumetric
Floodplain
Stability
Stability 09
of of
Management
Indigenous of Indigenous Woody
in
Woody
Ungauged
Woody Plant Plant Materials
Urban
Materials
Watershed
under
under
Different by Different : S S Wanniarachchi Seasoning Seasoning Techniques
and Techniques Eng. (Prof.) N T S
by Wijesekera by : Eng. by : Eng. : Eng. (Dr.) (Dr.) (Dr.) D D A A R D R Dolage, A Dolage, R Dolage, Eng. Eng. Eng. (Prof.) (Prof.) T T M M T M
Pallewatta Tensile Pallewatta Properties and and R and R R G R and G S R Bandara S G Bandara Volumetric S Bandara Stability
Investigation of Indigenous Investigation of of Two-Dimensional
Woody Two-Dimensional
of Two-Dimensional
Plant Materials under 17
Interaction Different Interaction between Seasoning between Piles Techniques Piles due due to due to Pile Pile to Driving Pile Driving
Action
by Action : Eng. (Dr.) D A R Dolage, Eng. (Prof.) T M
by Pallewatta by : S by : Sanchayan, S Sanchayan, : S Sanchayan, and R Eng. R Eng. G Eng. (Prof.) S (Prof.) Bandara (Prof.) U U G G A U A G A
Puswewala, Investigation Puswewala, S Aravinthan S of Aravinthan S Two-Dimensional
Aravinthan and and M and M G G M Kapilanath
G Kapilanath
Future
Interaction
Future Future Impact Impact
between
on on Maharagama on Maharagama
Piles due
Town
to
Town
Pile
Town Traffic
Driving
Traffic Traffic 25
Flow
Action
Flow Flow and and Pedestrian and Pedestrian Safety Safety due due to due to Southern
to Southern
Expressway
by
Expressway
: S Sanchayan,
and and Outer and Outer
Eng.
Outer Circular
(Prof.)
Circular
U
Highway:
G
Highway:
A
Highway:
Proposed Puswewala, Proposed Solutions
S Solutions Aravinthan and M G Kapilanath
by by Future : A. by : A. S. : S. A. Impact Amarasinghe, S. Amarasinghe, on Maharagama A. A. I. Gurusinghe I. A. Gurusinghe I. Gurusinghe Town Traffic and and and
Eng. Eng. Flow Eng. (Prof.) and (Prof.) K. Pedestrian K. S. S. K. Weerasekera
S. Weerasekera Safety due to Southern
The The
Expressway
following The following Paper
and
Paper Paper was
Outer
was placed was placed
Circular
placed the the First, the First,
Highway:
First, ‘Over ‘Over 35 35 35
years
Proposed
years years of of age’ age’ of Category
Solutions
age’ Category at at the the at Competition the Competition on on on
“Water
by
“Water “Water
: A.
as
S.
as A
Amarasinghe,
A Catalyst as Catalyst A Catalyst for for Development: for Development:
A.
Development:
I. Gurusinghe
Role Role of Role of
and
of
Engineering Eng. Engineering (Prof.) and and K. Technology” S. and Technology” Weerasekera Technology” 2010/2011
2010/2011
Sponsored The Sponsored following by: by: International Paper by: International was placed Water
the Water First, ‘Over 35
Management years Management of age’ Category Institute Institute at (IWMI) the (IWMI) Competition (IWMI) on
Challenges “Water Challenges as A in Catalyst in Dam in Dam Safety for Safety Development: Safety and and Extreme and Extreme Role of 39
Rainfall Engineering Rainfall Estimation and Estimation Technology” in in Relation in Relation 2010/2011 to to Sri Sri to Lanka Sri Lanka Lanka
by by Sponsored : Eng. by : Eng. : Eng. (Prof.) by: (Prof.) S. International S. S. Wickramasuriya S. Wickramasuriya S. Wickramasuriya Water and and and
Eng. Management Eng. Eng. (Dr.) (Dr.) (Dr.) (Mrs.) (Mrs.) Institute W. W. C. W. C. D. D. C. (IWMI) K. K. D. Fernando
K. Fernando
SECTION Challenges SECTION II II in II Dam Safety and Extreme
Rainfall Estimation in Relation to Sri Lanka
Application by
Application
: Eng. (Prof.)
of of WRF of
S.
WRF
S.
Weather
Wickramasuriya
Weather Model Model to to
and
to 51
Forecast Eng.
Forecast
(Dr.)
Precipitation (Mrs.)
Precipitation
W. C.
in in
D.
Nilwala in
K.
Nilwala
Fernando
River River Basin
Basin
by by : Eng. by : Eng. : Eng. (Prof.) (Prof.) K K D D W K W D Nandalal, W Nandalal, D D A A D A
Sachindra SECTION Sachindra and and II Eng. and Eng. Eng. (Dr.) (Dr.) (Dr.) U U R R Ratnayaka U Ratnayaka R Ratnayaka
Application of WRF Weather Model to
Mitigating Forecast Mitigating Precipitation Delays Delays in in Donor in in Donor Nilwala Funded Funded River Road
Basin Road 65
Projects by Projects : Eng. in in (Prof.) Sri Sri in Lanka Sri Lanka K Lanka D W Nandalal, D A
by by Sachindra : Eng. by : Eng. : Eng. J Jeyakanthan J and Jeyakanthan J Jeyakanthan Eng. (Dr.) and and U Eng. and R Eng. Ratnayaka Eng. (Prof.) (Prof.) A A K K W A W K W
Jayawardane
Jayawardane
Mitigating Delays in Donor Funded Road
Notes:
Notes:
Projects in Sri Lanka
ENGINEER, ENGINEER, established established in in 1973, 1973, in is 1973, is a Quarterly a is Quarterly a Quarterly
by : Journal, Eng. Journal, Journal, J Jeyakanthan published published in in the and the in months Eng. the months months (Prof.) of of January,
of A January, K W
Jayawardane
April, April, April, July July & July October & October & October of of the the of year. the year. year.
All All published All published articles articles have have have been been been refereed refereed in in in
Notes: anonymity anonymity by by at at least by least at two least two subject two subject subject specialists.
specialists.
Section ENGINEER, Section I contains I contains I contains established articles articles based in based 1973, based on on Engineering
is Engineering
on a Quarterly Engineering
Research Journal, Research while published while while Section in Section II the II contains months contains II contains articles of articles January, articles of of of
Professional April, Professional July Interest. & October Interest. Interest. of the year.
All published articles have been refereed in
anonymity by at least two subject specialists.
Section I contains articles based on Engineering
Research while Section II contains articles of
Professional Interest.