ENVIRONMENTAL IMPACTS OF THE PROPOSED BADDEGEDERA IMPOUNDING
N. Ratnayake and P.Y.D. de Silva
Department of Civil Engineering,
University of Moratuwa.
The alternative sources of water available for the consumers in the project
area covering Talpe, Habaraduwa, Koggala EPZ and coastal belt, Ahangama,
Dikkumbura and Imaduwa are ground water, or surface water from Gin ganga,
Nilwala ganga or the proposed impounding reservoir at Baddegedara.
The first choice on the basis of water quality and treatment costs was
ground water, but after a test drilling program this source was found
to be inadequate.
The proposed impounding reservoir at Baddegedara is located near to the
project area and technical feasibility studies revealed that this is a
Positive and negative environmental impacts of the proposed project were
identified using an environmental interaction matrix and it was attempted
to evaluate the overall impact using the Battelle's Environmental Evaluation
System. Weights for the different impacts were assigned depending on the
relative importance of the impacts. Value functions for some of the impacts
The topography of the area does not lend itself to the fashioning of a
deep lake. According to past studies, it has been showed that the ideal
wild life lake is shallow with gently sloping shores. This type of situation
could be expected from the proposed impoundment. These natural qualities
of the habitat could be further augmented by various management techniques
such as the restriction of the area of impoundment and catchment.
Department of Forestry and Environmental Science,
of Sri Jayewardenepura,Sri Lanka. 1995-2000. All rights reserved.