MAPPING AND GIS ANALYSIS OF HOUSEHOLD PONDS IN THE HALDA RIVER WATERSHED

Razat Suvra Das (), Sayedur Rahman Chowdhury, M. Shahadat Hossain, Milan Kumar Shiuli and Shubha Sarker
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Razat Suvra Das: Department of Oceanography, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
Sayedur Rahman Chowdhury: Institute of Marine Sciences, University of Chittagong, Chittagong 4331, Bangladesh
M. Shahadat Hossain: Institute of Marine Sciences, University of Chittagong, Chittagong 4331, Bangladesh
Milan Kumar Shiuli: Institute of Marine Sciences, University of Chittagong, Chittagong 4331, Bangladesh
Shubha Sarker: Institute of Marine Sciences, University of Chittagong, Chittagong 4331, Bangladesh

Earth Sciences Malaysia (ESMY), 2021, vol. 5, issue 2, 65-70

Abstract: A project was undertaken to create an inventory and generate relevant baseline information on household ponds in the Halda river watershed. This research is mostly belongs to Mapping and GIS analysis. At first all ponds are divided into two groups, large ponds (above 1000 m2 area) and small ponds (below 1000 m2 area). Then some important geometric and geographic parameters of large ponds are calculated. They are area, elevation and elevation wise distribution, neighbourhood distances, length, width, aspect ratio. Descriptive statistics are generated on these parameters and their mean, median, mode, sum, standard deviation, count, minimum, maximum etc. were calculated. Some informative charts are included in the result showing the findings. To calculate the area and total number of small ponds, intentional sampling is used. The average area of large ponds is about 2670 m2. The average elevation of these ponds is found 11.75 m. The mean neighbouring distance among these ponds is about 237 m and these ponds are rectangular shape in average because their average aspect ratio is 1.46 where aspect ratio 1.00 means the perfect square shape. The total area occupied by all ponds (both large and small) is estimated as 44.2 km2 and it is 2.63% of whole watershed area and 7.38 % of the valley area (here

Keywords: Digitization; Pond Map; Halda river watershed; Relative Neighbourhood Graph (RNG). (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:zib:zbesmy:v:5:y:2021:i:2:p:65-70

DOI: 10.26480/esmy.02.2021.65.70

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