Outer Circular Highway to the City of Colombo
Outer Circular Highway to the City of Colombo – EIA Biyagama Deviation
Client: JICA Study Team
Client Address: -
Source of Funding: -
Approx. Value Contract: -
Approx. Value of Services: LKR 1 million
Location: Greater Colombo
Start Date: February 2005
End Date: April 2005
Duration of Assignment: 3 months
Name of Associated Consultants: -
Description of the Project: Proposed deviation is 3,500 m and runs through marsh and paddy land and intermittent high ground. This is being considered to mitigate social issues of the project.
Scope of Work: ECL consultants assessed exiting drainage patterns across proposed deviation, assessed flood peak values, inundation levels, inundation periods for different rainfall events, identified existing irrigation / drainage / flood protection schemes, detention areas, marsh lands, water bodies, assessed drainage capacity of waterways and flood ways across proposed deviation, identified present flood detention capacity on either side of the roadway, present uses of ground and surface water, water quality, assessed general geology of area, ecological resources, socio-economic aspects, infrastructure facilities, considered development alternatives, identified environmental impacts including water quality impacts, erosion, siltation and sediment runoff, impacts on irrigation and flood protection works, impacts on flood plain and proposed mitigation measures for the pre-construction, construction and implementation phases.