tailieunhanh - Báo cáo vật lý: "WATER QUALITY RESPONSE TO CLEAR FELLING TREES FOR FOREST PLANTATION ESTABLISHMENT AT BUKIT TAREK F.R., SELANGOR"

Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: WATER QUALITY RESPONSE TO CLEAR FELLING TREES FOR FOREST PLANTATION ESTABLISHMENT AT BUKIT TAREK ., SELANGOR | Journal of Physical Science Vol. 18 1 33-45 2007 33 WATER QUALITY RESPONSE TO CLEAR FELLING TREES FOR foRest plantation establishment at BUKIT TAREK . SELANGOR Marryanna L. Siti Aisah S. and Saiful Iskandar K. Forest Research Institute Malaysia FRIM 52109 Kepong Kuala Lumpur Malaysia Corresponding author marryanna@ Abstract Hydrological study was carried out at Bukit Tarek . Kerling Selangor with the establishment offorest plantation. Seven years of water quality data were analysed to determine the effects of forest clear felling and buffer zone to the stream flow. Three experimental catchments C1 C2 and C3 were established for monitoring the changes. C1 was a control catchment C2 was clear felled and the residual trees were left on the site while C3 was also clear felled but the site was burnt prior to forest planting. The parameters observed were pH conductivity turbidity and colour. The values of each parameter increased during and after clear felled. The values of water quality in C3 were higher compared to C2. During clear felling catchment C3 indicated that pH increased was about conductivity and turbidity while catchment C2 pH increased conductivity and turbidity 279 . Parameters in control catchment C1 did not show significant changes for the whole observation period which during tree clear felling pH turbidity and conductivity increased at only and respectively. Colour did not show any significant trend for all catchments. The establishment of buffer zone in C2 reduced the direct effect of sediment that flows into the river. Two years after clear felled the water quality parameter started to decrease again and it is expected to be consistent and return to its normal level along with forest recovery. Keywords catchment plantation establishment physical water quality 1. INTRODUCTION Water related problem is one of the major issues confronting human kind today. The problem arises due to the rapid .