0 a Basin g elani Gan K a Basin y alu O K (Bund Constructed by GCFC&EIP Phase-I) Greater Colombo Basin Kelani North Bund Kelani Flood Plain (Unprotected Area) Gotatuwa Bund Isolation Bund Railway Embankment Wattala Bund Wattala Gate Peliyagoda Pumping Station
Scale North Lock Gate 012 km
The Study on Storm Water Drainage Plan Figure 2.1.1 for the Colombo Metropolitan Region Major Flood Control Facilities in Kelani Ganga in the Democratic Socialist Republic of Sri Lanka JAPAN INTERNATIONAL COOPERATION AGENCY Downstream
A8 - F8 New Mutwal Tunnel 0
Northward Mutwal Tunnel Drainage System Main Drain St. Sebastian North Canal St. Sebastian East Canal
St. Sebastian Kelani Ganga South Canal Dematagoda Ela
Kolonnawa Beira Lake Ela Mahawatta Gotatuwa Ela Pumping Station P
Torrington Kolonnawa North Canal Ela North
Torrington Kolonnawa South Canal Ela South
Madiwela East Diversion Canal Welawatta Heen Ela Canal Parliament Kotte Ela North Lake
Kotte Ela South Dehiwala Kirillapone Canal Canal Madiwela Catchment
Bolgoda Canal Westward Drainage System
Madiwela South Diversion Canal
Legend
Weras Ganga Basin Boundary Drainage System Boundary
Channel Improvement Construction of Tunnel / Diversion Channel Scale 0 1 2 km Retention Areas
The Study on Storm Water Drainage Plan Figure 2.1.2 for the Colombo Metropolitan Region Proposed New Capital City Drainage in the Democratic Socialist Republic of Sri Lanka JAPAN INTERNATIONAL COOPERATION AGENCY Project
A8 - F9 0
St. Sebastian North Canal
St. Sebastian East Canal
Main Drain Kelani Ganga
St. Sebastian Northern South Canal System Dematagoda Ela
Kolonnawa Beira Lake Ela Mahawatta Ela
Torrington Kolonnawa North Canal Ela North
Torrington Kolonnawa South Canal Ela South
Western Heen Ela Madiwela East System Diversion Canal Welawatta Canal Kotte Ela North Parliament Lake Kotte Ela South Dehiwala Kirillapone Canal Canal Southern System Eastern System
Bolgoda Canal
Weras Ganga
Legend Scale Basin Boundary 0 1 2 km Canal System Boundary Canals Improved by GCFC&EIP Phase-I Other Canals Inland Marsh Lands (identified in 1:50,000 scale topographic map)
The Study on Storm Water Drainage Plan Figure 2.1.3 for the Colombo Metropolitan Region Main Canals Improved by GCFC&EIP in the Democratic Socialist Republic of Sri Lanka JAPAN INTERNATIONAL COOPERATION AGENCY Phase I
A8 - F10 0
St. Sebastian-2 Scheme
Dematagoda Scheme
Surpentine Scheme
Unity Place Scheme
Torrington North Scheme
Kawdana Scheme
Attidiya Scheme Legend
Major Canals Improved by GCFC&EIP Phase-1
Other Canals
CMC 19 Schemes Urban Drainage Schemes Studied
Lunawa Lake Urban Drainage Schemes Completed North Scheme (GCFC&EIP Phase-II) Colombo South 5 Schemes Urban Drainage Schemes Studied Urban Drainage Schemes Implemented (GCFC&EIP Phase-III) Lunawa Lake South Scheme Urban Drainage Schemes to be Implemented
Scale Nugegoda Town Area Scheme Studied 0 1 2 3 4 km Kotte and Kolonnawa Schemes Studied
The Study on Storm Water Drainage Plan Figure 2.1.4 for the Colombo Metropolitan Region Existing and Planned Storm Water Drainage in the Democratic Socialist Republic of Sri Lanka JAPAN INTERNATIONAL COOPERATION AGENCY Schemes in Greater Colombo Area
A8 - F11