Malaysian Journal of Analytical Sciences Vol 19 No 6 (2015): 1327 - 1334

 

 

 

TREND ANALYSIS OF PAHANG RIVER USING NON-PARAMETRIC ANALYSIS: MANN KENDALL’S TREND TEST

 

(Analisis Corak Sungai Pahang Menggunakan Kaedah Bukan Parametrik: Ujian Corak

Mann Kendall)

 

Nur Hishaam Sulaiman1, Mohd Khairul Amri Kamarudin1,2*, Ahmad Dasuki Mustafa1, 

Muhammad Azizi Amran1,  Fazureen Azaman1, Ismail Zainal Abidin1, Norsyuhada Hairoma1

 

1East Coast Environmental Research Institute (ESERI)

2Faculty of Design Arts and Engineering Technology

Universiti Sultan Zainal Abidin, 21300 Kuala Terengganu, Terengganu, Malaysia

 

*Corresponding author: mkhairulamri@unisza.edu.my

 

 

Received: 14 April 2015; Accepted: 9 July 2015

 

 

Abstract

Flood is common in Pahang especially during northeast monsoon season from November to February. Three river cross station: Lubuk Paku, Sg. Yap and Temerloh were selected as area of this study. The stream flow and water level data were gathered from DID record. Data set for this study were analysed by using non-parametric analysis, Mann-Kendall Trend Test. The results that obtained from stream flow and water level analysis indicate that there are positively significant trend for Lubuk Paku (0.001) and Sg. Yap (<0.0001) from 1972-2011 with the p-value < 0.05. Temerloh (0.178) data from 1963-2011 recorded no trend for stream flow parameter but negative trend for water level parameter. Hydrological pattern and trend are extremely affected by outside factors such as north east monsoon season that occurred in South China Sea and affected Pahang during November to March. There are other factors such as development and management of the areas which can be considered as factors affected the data and results. Hydrological Pattern is important to indicate the river trend such as stream flow and water level. It can be used as flood mitigation by local authorities.

 

Keywords:  Mann Kendall, flood, trend analysis, hydrology, Pahang River

 

Abstrak

Banjir di Pahang pada musin  monsun timur laut yang membadai pantai timur semenanjung Malaysia pada  November hingga Febuari. Terdapat tiga buah stesen hidrologi yang ditempatkan di sepanjang Sungai Pahang telah dipilih untuk mewakili keseluruhan Sungai Pahang iaitu Lubuk Paku, Sg.Yap dan Temerloh. Dalam kajian ini juga, parameter yang digunakan ialah bersifat fizikal iaitu kelajuan arus dan paras air Sungai Pahang yang diperoleh daripada JPS. Kesemua data yang diperoleh dianalisa dengan menggunakan analisa bukan parametrik iaitu Ujian Corak Mann-Kendall. Keputusan yang diperoleh daripada hasil analisis data menunjukkan bahawa terdapat corak peningkatan positif pada data yang mewakili Lubuk Paku dan Sungai Yap dari tahun 1972-2011. Kesemua p-value yang dikira menunjukkan jelas terdapat corak dalam kedua-dua data pertama untuk Lubuk Paku (0.001) dan Sungai Yap (kurang daripada 0.0001) di mana jumlah p-value kurang daripada 0.05. Temerloh (0.178) mencatatkan tiada corak untuk kelajuan arus manakala untuk paras air ia mencatatkan corak negatif. Terdapat pelbagai faktor yang mempengaruhi corak hidrologi Sungai Pahang iaitu dari segi tiupan angin monsun dan pembangunan yang dijalankan di kawasan kajian yang memberi impak yang besar terhadap ketepatan data dan keputusan analisa. Pemantauan corak hidrologi amat penting untuk mengetahui corak sungai dan boleh digunakan sebagai maklumat persediaan banjir di Pahang.

 

Kata kunci:  Mann Kendall, banjir, analisis corak, hidrologi, Sungai Pahang

 

References

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