Abstract:
This paper presents the results of a study on spatial variation of texture and organic matter
content in bottom sediments of the Batticaloa Lagoon, Sri Lanka. Sediment samples from the
Batticaloa Lagoon were collected at 25 different locations during the latter part of rainy season
(January 2015 to February 2015) to assess the characteristics of texture and organic matter content in
the lagoon bottom sediments. The texture analysis of sediments shows that sand was found to be the
major contributor to the sediment texture of the lagoon bed. The average percentage of sand, silt and
clay in the Batticaloa Lagoon sediment was 87%, 6% and 7% respectively. Average amount of organic
matter in the sediment was found as 2.62%. Total organic matter showed significant positive
correlation with silt (r=0.758) and clay (r = 0.775) but significant negative correlation with sand (r = -
0.925). The values of organic matter content do not exceed the acceptable limits (2.56 – 3g per 100g).
The present study results of sediments will be a baseline information and useful tool for future
researchers for actual assessment of environmental pollution of this lagoon in terms of organic matter
content and particle size.
