Current phosphate discharge of Inanam River, Sabah

Kanageswari Krishnan (2005) Current phosphate discharge of Inanam River, Sabah. Universiti Malaysia Sabah. (Unpublished)


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This study analyzed data collected from four chosen sites along the Inanam River of Sabah between 14th December 2004 and 5th Feb February 2005 to understand the relationship between stream discharge and phosphate concentration and to determine the phosphate discharges along the river. In addition, the effect of a river tributary (Kitobu stream), running water from agricultural land, to phosphate discharge of the river was also examined. Stream discharge was measured using the velocity-area method and phosphate concentrations (as total phosphorus) were analyzed with colorimetric method (Ascorbic Acid Method). Stream discharge was negatively related to phosphate concentration at Sites 1 and 2, indicating point sources of phosphate. At Sites 3 and 4, stream discharge was positively related to phosphate concentrations indicating non-point sources of phosphate. Phosphate discharges increased from upstream Site 1 (0.0018 g S�¹ to 0.0066 g S�¹) to Site 2 (0.077 g S�¹ to 0.7448 g S�¹) and to Site 3 ( 0.1277 g S�¹to 1.5744 g S�¹) downstream. Phosphate discharge from agricultural land, at Site K, ranged between 0.006 g S�¹ to 0.1389 g S�¹. Site K has been identified as not contributing to high phosphate discharge at Site 3.

Item Type: Academic Exercise
Keyword: stream discharge, phosphate concentration, phosphate discharge, velocity-area method, colorimetric method, agricultural land, river
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Department: SCHOOL > School of Science and Technology
Date Deposited: 15 Jan 2015 13:41
Last Modified: 24 Oct 2017 11:28

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