NDLI: Determination of the Potential Water Storage Capacity in Ancient Abandoned Tanks in Walawe River Basin, Sri Lanka

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Determination of the Potential Water Storage Capacity in Ancient Abandoned Tanks in Walawe River Basin, Sri Lanka

Content Provider	Semantic Scholar
Author	Sanjaya, Henegama Liyanage Kelum Priyadarshana, Tilak Wijayarathna, N. S.
Copyright Year	2014
Abstract	Especially, in dry and Semi-arid areas of the world are suffering from lack of water due to ignorance of finding new opportunities to overcome water scarcity. Similarly, Walawe river basin (WRB) which lies in dry and semiarid zone of Sri Lanka has a higher demand for water in Agricultural, Industrial and Domestic uses. More than 600 small scale tanks which have been constructed in the history are in the abandoned state, but, majority of them has a potential for rehabilitation. However, storage capacity estimation of abandoned tanks for future restoration purposes is still to be studied to understand its potential. Here, we studied the applicability of area capacity relationship to fill the aforementioned gap. Required maps and data on capacity, dimensions of the present working tanks were gathered from the government departments. Field works were conducted for randomly selected 250 tanks for ground level verifications. Mapping and data interpretations were done with Arc GIS 10.1 software. Data were statistically analyzed with SPSS 16.0 package. During the study,it was identified about 527 abandoned tanks and out of them, 302 tanks were in scrub lands. All the abandoned tanks are located at a slope of 0-4% in meter. A significant log area log capacity relationship for small tanks (R 2 = 0.85) was observed while log dam length and log capacity relationship for major and medium scale tanks (R 2 = 0.64) was significant. According to the derived relationship, the estimated potential storage capacity of abandoned small scale tanks was about 32Million Cubic Meter (MCM) which can increase the storage approximately by 3.27% in the basin, for improving the environment, agriculture and livelihood.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://ijsk.org/uploads/3/1/1/7/3117743/4_water_storage_capacity_-marine_sci.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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