The Effect Of Deforestation On Catchment Response In The Tropical Climate Region: Case Study For Sungai Padas Catchment

• Main Author: Joseph , Dinor
• Format: Thesis
• Language: English
• Published: 2009
• Subjects: TN1-997 Mining engineering. Metallurgy
• Online Access: http://eprints.usm.my/41529/1/Joseph_Dinor24.pdf; http://eprints.usm.my/41529/
• Institution: Universiti Sains Malaysia

Aktiviti perhutanan merupakan salah satu faktor penyebab kepada kemusnahan sistem sungai dan sistem ekologi dalam suatu kawasan tadahan. Aktiviti perhutanan telah menyebabkan beberapa bahagian di kawasan tadahan Sungai Padas mengalami perubahan tumbuhan tutup bumi, misalnya di kawasan Tambunan, Sook dan Sipitang. Kajian ini dijalankan untuk menganggar hidrograf aliran langsung Sungai Padas, yang disebabkan oleh perubahan guna tanah yang berpunca daripada aktiviti penebangan hutan menggunakan pemodelan hidrologi iaitu HEC-HMS (versi 2.2.2) berdasarkan senario perbandingan guna tanah sebelum dan selepas penebangan hutan di kawasan tersebut. Deforestation activities have been widely known as one of the devastating factor to the river system and ecological system in a catchment. Deforestation activities at some areas within the Sungai Padas catchment has resulted in the changes of land cover particularly in Tambunan, Sook and Sipitang catchment area. The main objective of this study is to investigate the direct runoff hydrograph in Sungai Padas, due to the changes of land cover caused by deforestation activities using HEC-HMS (version 2.2.2). The design direct runoff hydrograph resulting from 2, 5, 10, 25, 50 and 100-yr ARI for 72 hours rainfall duration were applied to evaluate the effect of deforestation on catchment response.