Variasi hujan dan potensi tuaian air hujan di Bandar Baru Bangi (Rainfall variation and rainwater harvesting potential in Bandar Baru Bangi)

Noorazuan Md. Hashim, Shamsuddin Man, Yaakob Mohd Jani

Abstract


Abstrak

 

Pertambahan populasi bandar dan penguncupan rezab air di Selangor telah memungkinkan pihak kerajaan mempromosikan kepenggunaan sistem penuaian air hujan sebagai sumber bekalan alternatif di kalangan pengguna. Makalah ini meneliti hasil aplikasi sistem berkenaan di tapak eksperimental Bandar Baru Bangi berdasarkan kepada beberapa episod variasi hujan yang direkodkan pada Disember 2014 hingga April 2015. Data cerapan berkenaan digunakan bagi mengenalpasti sejauhmana hubungkaitan di antara taburan hujan tempatan dan potensi isi padu variasi air tuaian yang dikutip oleh sistem berkenaan. Hasil eksperimental di tapak kajian menunjukkan isi padu tuaian hujan mempunyai julat yang besar, iaitu dari serendah 0.018 m3 sehingga setinggi 2.722 m3.Model hubungan antara isi padu tuaian hujan dan kedalaman hujan menghasilkan nilai R2 yang tinggi (R2 = 89%). Hasil kajian ini juga telah menunjukkan keadaan isi padu tangki storan (1000 liter) di tapak eksperimental berkenaan adalah bersesuaian dengan kondisi taburan variasi tuaian hujan.

 

Kata kunci: Bandar Baru Bangi, hujan, isi padu tuaian, model, tapak eksperimental, tuaian air hujan

Abstract

 

Rainwater harvesting is a method of capturing the rainfall to meet water requirement in both urban and rural areas. Urban population growth and reduction of water reserved in Selangor has allowed the government to promote the rainwater harvesting system as an alternative resource among consumers. This paper attempts to examine rainwater harvesting system at the experimental site of Bandar Baru Bangi, based on several episodes of rain variations recorded from December 2014 to April 2015. The observation data being used to identify the relationship between the local rainfall and the potential volume variation of the harvested water. The experimental results revealed that the harvested volume varies, from the lowest value of 0.018 m3 to the highest of 2.722 m3. The relationship between harvested volume and the depth of rainfall produced significant R2 value (R2 = 89%). The study also proved that the volume of storage tank (1000 litres) at the experimental site is suitable with rainwater harvesting variation.

 

Keywords: Bandar Baru Bangi, rainfall, harvested volume, model, experimental plot, harvested rainwater


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References


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