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The modelled raindrop size distribution of Skudai, Peninsular Malaysia, using exponential and lognormal distributions.

Yakubu ML, Yusop Z, Yusof F - ScientificWorldJournal (2014)

Bottom Line: This study established five different parametric expressions describing the rain rate of Skudai; these models are idiosyncratic to the climate of the region.Sophisticated equipment that converts sound to a relevant raindrop diameter is often too expensive and its cost sometimes overrides its attractiveness.This research abrogates the concept of exclusive occurrence of convective storm in tropical regions and presented a new insight into their concurrence appearance.

View Article: PubMed Central - PubMed

Affiliation: Institute of Environmental and Water Resources Management, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia ; Department of Civil Engineering, Faculty of Engineering, Kano University of Science and Technology, 713101 Wudil, Kano, Nigeria.

ABSTRACT
This paper presents the modelled raindrop size parameters in Skudai region of the Johor Bahru, western Malaysia. Presently, there is no model to forecast the characteristics of DSD in Malaysia, and this has an underpinning implication on wet weather pollution predictions. The climate of Skudai exhibits local variability in regional scale. This study established five different parametric expressions describing the rain rate of Skudai; these models are idiosyncratic to the climate of the region. Sophisticated equipment that converts sound to a relevant raindrop diameter is often too expensive and its cost sometimes overrides its attractiveness. In this study, a physical low-cost method was used to record the DSD of the study area. The Kaplan-Meier method was used to test the aptness of the data to exponential and lognormal distributions, which were subsequently used to formulate the parameterisation of the distributions. This research abrogates the concept of exclusive occurrence of convective storm in tropical regions and presented a new insight into their concurrence appearance.

Show MeSH
Logarithmized standard deviation-intensity relationship.
© Copyright Policy - open-access
Related In: Results  -  Collection


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fig9: Logarithmized standard deviation-intensity relationship.

Mentions: Figures 8 and 9 indicated that ND and σ increase with increasing rain rate while Figure 10 suggests decrease of μ with increasing intensity. Timothy et al. [5] suggested that the three modelled lognormal parameters are not sufficient to describe the rain rate based on their data. The result of this study, however, indicated that the σ and μ relationships in Figures 8 and 9 are sufficient to describe rain rate especially at intensity of less than 40 mm h−1. But the ND relationship with intensity presented in Figure 8 suggests that the ND depends not only on the rain rate but also on other climatic parameters like the rain type.


The modelled raindrop size distribution of Skudai, Peninsular Malaysia, using exponential and lognormal distributions.

Yakubu ML, Yusop Z, Yusof F - ScientificWorldJournal (2014)

Logarithmized standard deviation-intensity relationship.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4121099&req=5

fig9: Logarithmized standard deviation-intensity relationship.
Mentions: Figures 8 and 9 indicated that ND and σ increase with increasing rain rate while Figure 10 suggests decrease of μ with increasing intensity. Timothy et al. [5] suggested that the three modelled lognormal parameters are not sufficient to describe the rain rate based on their data. The result of this study, however, indicated that the σ and μ relationships in Figures 8 and 9 are sufficient to describe rain rate especially at intensity of less than 40 mm h−1. But the ND relationship with intensity presented in Figure 8 suggests that the ND depends not only on the rain rate but also on other climatic parameters like the rain type.

Bottom Line: This study established five different parametric expressions describing the rain rate of Skudai; these models are idiosyncratic to the climate of the region.Sophisticated equipment that converts sound to a relevant raindrop diameter is often too expensive and its cost sometimes overrides its attractiveness.This research abrogates the concept of exclusive occurrence of convective storm in tropical regions and presented a new insight into their concurrence appearance.

View Article: PubMed Central - PubMed

Affiliation: Institute of Environmental and Water Resources Management, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia ; Department of Civil Engineering, Faculty of Engineering, Kano University of Science and Technology, 713101 Wudil, Kano, Nigeria.

ABSTRACT
This paper presents the modelled raindrop size parameters in Skudai region of the Johor Bahru, western Malaysia. Presently, there is no model to forecast the characteristics of DSD in Malaysia, and this has an underpinning implication on wet weather pollution predictions. The climate of Skudai exhibits local variability in regional scale. This study established five different parametric expressions describing the rain rate of Skudai; these models are idiosyncratic to the climate of the region. Sophisticated equipment that converts sound to a relevant raindrop diameter is often too expensive and its cost sometimes overrides its attractiveness. In this study, a physical low-cost method was used to record the DSD of the study area. The Kaplan-Meier method was used to test the aptness of the data to exponential and lognormal distributions, which were subsequently used to formulate the parameterisation of the distributions. This research abrogates the concept of exclusive occurrence of convective storm in tropical regions and presented a new insight into their concurrence appearance.

Show MeSH