Flooding in Galle which is an annual occurrence is mostly due to poor drainage systems. Severe flooding which took place in 2003 and 2010 was caused due to heavy rainfall in the area. Lands which are drained out by slot hampers the natural flow due to its thickness while the drainage system is also polluted and unable to carry the flood water to the sea due to lack of maintenance., and also due to partly debris fallen palm trees, garbage dumping and overgrown weeds. Canal banks at various locations are unprotected, unstable and encroached by illegal settlements. Gabions at many locations are poorly designed, oversized, unstable. The canal’s cross-sections are generally unfit to properly and reliably convey flood waters. Cross-drains discharging to the main canals and elsewhere in the town are only partly lined and are poorly maintained, generally lacking in capacity to convey the excess rainfall in a proper manner.
The city is served by a system of open canals and an old brick-lined underground tunnel built over 150 years ago to carry storm water from the city to an open stream. The frequent collapsing of the underground drain system is a growing threat to public safety, which requires urgent rehabilitation.
These activities are focused to enhance urban public spaces and also to a form a strong pedestrian connectivity between key destinations by leveraging city assets. Interventions may include rehabilitation of public areas within the Fort, such as its rampart system, bastions and squares. Outside the Fort, coastal pathways would be rehabilitated to provide continuous pedestrian access along the waterfront and improve connectivity to the inner city and Fort entrances.