Stream water quality of undisturbed forest catchments in Peninsular Malaysia

Abdul Rahim Nik, . and Zulkifli Yusop, . (1987) Stream water quality of undisturbed forest catchments in Peninsular Malaysia. [Proceedings Paper]

The hydrologic and chemical characteristics of three small streams flowing through undisturbed forest catchments underlain by granitic rock were investigated. Records of stream discharge were available at three sites on gauged catchments. Water samples were obtained at regular weekly intervals; additional samples were taken during storm events. Hydrologic and water quality parameters were monitored for three water years July 1980 - Jun 1983. Annual rainfall during this period ranged from 1771.2 to 2551.1 mm; with corresponding annual runoff coefficients ranging from 9.5 to 16.6 percent. Water samples were analysed for dissolved calcium magnesium pot1064assium sodium nitrate sulphate phospate chloride and total iron pH and electrical conductivity. Most chemical parameters displayed no consistent monthly variation throughout the years; sodium and calcium cations were dominant in all streams. Log-log and semi-log transformation of data were developed to predict water quality variability with discharge. Calcium sodium and dissolved silica concentrations electrical conductivity and pH decreased with increasing discharge whereas nitrate and phosphate concentrations increased. However magnesium and ammonium were not significantly related to discha

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Abstract

The hydrologic and chemical characteristics of three small streams flowing through undisturbed forest catchments underlain by granitic rock were investigated. Records of stream discharge were available at three sites on gauged catchments. Water samples were obtained at regular weekly intervals; additional samples were taken during storm events. Hydrologic and water quality parameters were monitored for three water years July 1980 - Jun 1983. Annual rainfall during this period ranged from 1771.2 to 2551.1 mm; with corresponding annual runoff coefficients ranging from 9.5 to 16.6 percent. Water samples were analysed for dissolved calcium magnesium pot1064assium sodium nitrate sulphate phospate chloride and total iron pH and electrical conductivity. Most chemical parameters displayed no consistent monthly variation throughout the years; sodium and calcium cations were dominant in all streams. Log-log and semi-log transformation of data were developed to predict water quality variability with discharge. Calcium sodium and dissolved silica concentrations electrical conductivity and pH decreased with increasing discharge whereas nitrate and phosphate concentrations increased. However magnesium and ammonium were not significantly related to discha

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Item Type:	Proceedings Paper
Additional Information:	7 ill.; 3 tables; 20 ref. Summary En
AGROVOC Term:	eMALASIA PENINSULAR
AGROVOC Term:	CALIDAD DEL AGUA
AGROVOC Term:	ARROYOS
AGROVOC Term:	AREAS DE CAPTACION/ LLUVIA
AGROVOC Term:	ESCORRE
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:25
URI:	http://webagris.upm.edu.my/id/eprint/14538

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