Sains Malaysiana 39(3)(2010): 353–361

Analisis Banjir Disember 2006: Tumpuan di Kawasan Bandar Segamat, Johor

(Flood Analysis of December 2006: Focus at Segamat Town, Johor)

Muhammad Barzani Gasim¹*, Salmijah Surif¹, Mazlin Mokhtar²,

Mohd. Ekhwan Hj. Toriman³, Sahibin Abd. Rahim¹ & Chong Huei Bee¹

¹Pusat Pengajian Sains Sekitaran & Sumber Alam

Fakulti Sains & Teknologi, Universiti Kebangsaan Malaysia

43600 Bangi, Selangor D. E., Malaysia

²Institut Alam Sekitar dan Pembangunan (LESTARI)

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor D. E., Malaysia

³Pusat Pengajian Sains Sosial, Pembangun & Persekitaran

Fakulti Sains Sosial & Kemanusiaan

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor D. E., Malaysia

Diserahkan: 16 Februari 2009 / Diterima : 4 September 2009

ABSTRAK

Kajian ini bertujuan untuk mengenal pasti punca berlakunya banjir di Segamat pada 17 hingga 21 Disember 2006. Kegiatan termasuklah mengumpul, menilai dan mengalisis data taburan hujan dari Januari 1998 hingga Disember 2006 serta menganalisis data telemetri harian bagi aras dan luahan air sungai pada Disember 2006. Satu set data hujan harian, bulanan dan tahunan dari Stesen Felda Medoi, Segamat telah dianalisis dan dihubungkait dengan data telemetri. Data taburan hujan selama 8 tahun tersebut menunjukkan kawasan Bandar Segamat menerima hujan bulanan yang berjulat daripada 2.5 mm (Februari 2004) sehingga 536.8 mm (Januari 2003). Taburan hujan bulanan Oktober sehingga Disember 2006 menunjukkan kenaikan secara positif, iaitu daripada 118 mm sehingga 435 mm/bulan tetapi berlaku penurunan (392 mm) pada Januari 2007. Hasil kajian menunjukkan bahawa hujan lebat yang luar biasa dan keadaan bentuk topografi yang rendah dan beralun di kawasan kajian adalah penyebab utama banjir di Segamat.

Kata kunci: Banjir Segamat 2006; data telemetri; luahan air; stesen Felda Medoi

ABSTRACT

This study aimed to ascertain the causes of Segamat flood which occurred from 17 to 21 December 2006. Actvities include collection, evaluation and analysis of rainfall data from January 1998 to December 2006, and analysis of daily telemetry for water levels and discharge in December 2006. The daily, monthly and annual rainfall of Felda Medoi Station, Segamat were analyzed and correlated with the telemetry data. Based on the 9 years rainfall data, monthly rainfall in Segamat area ranged from 2.5 mm (Februari 2004) to 536.8 mm (January 2003). Monthly rainfall distribution from October to December 2006 increased from 118 mm to 435 mm but decreased (392 mm) in January 2007. Our result showed that extra ordinary heavy downpour, low and undulating topography of the study area was identified as the main cause for the Segamat flood. Keywords: 2006 Segamat flood; Felda Medoi station; stream flow; telemetry data

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* Pengarang untuk surat-menyurat; email: dr.zani@ukm.my