The effects of logging road construction and timber harvesting activities on stream water quality in Deramakot forest reserve

Samin Salim, . (2004) The effects of logging road construction and timber harvesting activities on stream water quality in Deramakot forest reserve. [Proceedings Paper]

The study is to determine the effects of logging road construction and timber harvesting on stream water quality in the logging area in Deramakot Forest Reserve. This study was conducted in compartment 51 as control watershed and compartment 63 and 68 as disturbed watersheds. Parameters used for determining water quality are temperature dissolved oxygen pH turbidity electrical conductivity colour and suspended solid. Measurements of stream water quality parameters were carried out in three stages.Stage one when the watersheds i.e. compartments 63 and 68 were still undisturbed and stage two immediately after the roads had been constructed and during active logging activities and stage three after the logging activities had stopped. After the roads had been constructed and harvesting activities commenced in compartments 63 and 68 an increase in the average values of water turbidity of approximately 374.5 1.629 colour 107.2 1.047 pH 5.75 0.0799 electrical conductivity 13.74 24.68 and suspended solid 128.4 159.78 had been observed. The average values of water temperature and dissolved oxygen did not show any significant difference compared to the average value of the control watershed. Though both sides of streams in compartments 63 and 68 were protected by buffer zone of width 5 meters and 30 meters respectively it was not able to completely control the movement of the soil sediments into the stream water. But four month after the logging operation had stopped the mean value of suspended soil turbidity pH electrical conductivity and colour rate have reverted back to normal condition. This was attributed to rapid spread or ground vegetation which cover up the exposed ground surfaces thereby protecting the soil physically from erosion.

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Abstract

The study is to determine the effects of logging road construction and timber harvesting on stream water quality in the logging area in Deramakot Forest Reserve. This study was conducted in compartment 51 as control watershed and compartment 63 and 68 as disturbed watersheds. Parameters used for determining water quality are temperature dissolved oxygen pH turbidity electrical conductivity colour and suspended solid. Measurements of stream water quality parameters were carried out in three stages.Stage one when the watersheds i.e. compartments 63 and 68 were still undisturbed and stage two immediately after the roads had been constructed and during active logging activities and stage three after the logging activities had stopped. After the roads had been constructed and harvesting activities commenced in compartments 63 and 68 an increase in the average values of water turbidity of approximately 374.5 1.629 colour 107.2 1.047 pH 5.75 0.0799 electrical conductivity 13.74 24.68 and suspended solid 128.4 159.78 had been observed. The average values of water temperature and dissolved oxygen did not show any significant difference compared to the average value of the control watershed. Though both sides of streams in compartments 63 and 68 were protected by buffer zone of width 5 meters and 30 meters respectively it was not able to completely control the movement of the soil sediments into the stream water. But four month after the logging operation had stopped the mean value of suspended soil turbidity pH electrical conductivity and colour rate have reverted back to normal condition. This was attributed to rapid spread or ground vegetation which cover up the exposed ground surfaces thereby protecting the soil physically from erosion.

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Item Type:	Proceedings Paper
Additional Information:	14 tables. 9 refs.
AGROVOC Term:	FORESTRY
AGROVOC Term:	LOGGING
AGROVOC Term:	CONSTRUCTION
AGROVOC Term:	ROADS
AGROVOC Term:	WOOD
AGROVOC Term:	RIVERS
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:28
URI:	http://webagris.upm.edu.my/id/eprint/16624

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