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- Title
Use of geographical information system and remote sensing techniques for planning culture-based fisheries in non-perennial reservoirs of Sri Lanka.
- Authors
Wijenayake, W. M. Hiranya Kelum; Gunaratne, A. B. Ajith Kumara; De Silva, Sena S.; Amarasinghe, Upali S.
- Abstract
The presence of a wide areal extent of small-sized village reservoirs offers a considerable potential for the development of culture-based fisheries ( CBFs) in Sri Lanka. To this end, this study uses geographical information systems ( GISs) and remote sensing ( RS) techniques to determine the morphometric and biological characteristics most useful for classifying non-perennial reservoirs for CBF development and for assessing the influence of catchment land-use patterns on potential CBF yields. The reservoir shorelines at full water supply level were mapped with a Global Positioning System to determine shoreline length and reservoir areal extent. The ratio of shoreline length to reservoir extent, which was reported to be a powerful predictor variable of CBF yields, could be reliably quantified using RS techniques. The areal extent of reservoirs, quantified with RS techniques ( RS extent), was used to estimate the ratio of forest cover plus scrubland cover to RS extent and was found to be significantly related to the CBF yield (R2 = 0.400; P < 0.05). The results of this study indicated that morphometric characteristics and catchment land-use patterns, which might be viewed as indices of biological productivity, can be quantified using RS and GIS techniques.
- Subjects
SRI Lanka; FISH industry; TRADITIONAL fishing; GEOGRAPHIC information systems; REMOTE sensing; SHORELINES; RESERVOIRS
- Publication
Lakes & Reservoirs: Research & Management, 2014, Vol 19, Issue 3, p183
- ISSN
1320-5331
- Publication type
Article
- DOI
10.1111/lre.12071