Limits...
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
Lognormal probability test plot.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4121099&req=5

fig4: Lognormal probability test plot.

Mentions: The quantile-quantile (Q-Q) and probability plots were respectively used to test whether our study data follows the exponential and lognormal distributions. The Kaplan-Meier method was used for the survival analyses. The Q-Q and probability plots for the median drop diameter for each intensity were presented in Figures 3 and 4, respectively. The figures indicated the veracity of our study data to suit the lognormal and exponential distributions. Figure 3 presents the exponential Q-Q plot showing the studied raindrop sizes values on x-axis and their expected values on y-axis, while Figure 4 is the lognormal probability plot which is a plot showing the observed cumulative percentage of raindrop sizes on x-axis and their expected cumulative percentiles on y-axis.


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

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

Lognormal probability test plot.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig4: Lognormal probability test plot.
Mentions: The quantile-quantile (Q-Q) and probability plots were respectively used to test whether our study data follows the exponential and lognormal distributions. The Kaplan-Meier method was used for the survival analyses. The Q-Q and probability plots for the median drop diameter for each intensity were presented in Figures 3 and 4, respectively. The figures indicated the veracity of our study data to suit the lognormal and exponential distributions. Figure 3 presents the exponential Q-Q plot showing the studied raindrop sizes values on x-axis and their expected values on y-axis, while Figure 4 is the lognormal probability plot which is a plot showing the observed cumulative percentage of raindrop sizes on x-axis and their expected cumulative percentiles on y-axis.

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