By Nur Amira binti Abd Aziz
For this entry, I’m going to explain Tableau’s features that I’ve used in my viz and explain on how you can interact with it. If you are interested in the more detailed rainfall of Malaysia in 2008-2015, you can check out my viz on Rainfall in Malaysia, 2008-2015. But first, let me give you a little information on Malaysia’s climate.
Located near the equator, Malaysia's climate is categorised as equatorial, being hot and humid throughout the year. The average rainfall is 250 centimetres (98 in) a year and the average temperature is 27 °C (80.6 °F). The climates of the Peninsula and the East differ, as the climate on the peninsula is directly affected by wind from the mainland, as opposed to the more maritime weather of the East. Malaysia is exposed to the El Niño effect, which reduces rainfall in the dry season. Climate change is likely to have a significant effect on Malaysia, increasing sea levels and rainfall, increasing flooding risks and leading to large droughts. The highest rainfall recorded in a day was 608 mm (23.9 in) in Kota Bharu, Kelantan on 6 January 1967. The highest rainfall recorded in a year was 5,687 mm (223.9 in) at Sandakan, Sabah in 2006. Meanwhile, the lowest rainfall recorded in a year was 1,151 mm (45.3 in) at Tawau, Sabah in 1997. The wettest place in Malaysia is Kuching, Sarawak with an average rainfall of 4,128 mm (162.5 in) with 247 days of rain a year. The driest place in Malaysia is in Chuping, Perlis with average rainfall of only 1,746 mm (68.7 in) a year.
Rainfall in Malaysia
Now that you have the idea of Malaysia’s climate (you can always google for more information), I’m going to explain on how you can interact with my viz, chapter by chapter.
For the first chapter of my viz’s story, I’m showing the locations of all weather stations throughout Malaysia and their total rainfall over years. The color and size of the clouds on the map shows total of rainfall (mm). Red and orange colors, and small size indicate low total rainfall while blue color and big size indicate high total rainfall. To interact with this dashboard, you can use the filters to select weather stations that you want to look at and select specific date range.
In the second chapter, I highlighted 10 weather stations that collected most of the rainfall since 2008 until now. The features here are just the same as the first chapter.
Click to Interact with Rainfall in Malaysia Tableau-viz
For the third chapter, I’m showing monthly rainfall comparison and a little info on Malaysia’s monsoon wind seasons. Color and size in the chart shows total rainfall (mm) broken down by Year vs. Month. Here, you can also use filters to select any weather stations in any date ranges from 1/1/2014 until 30/4/2015. You can check on which month has lots of rainfall throughout the years.
*Please visit NAHRIM Hydroclimate Projection for the above visualization data source
In the fourth chapter, I’m showing rainfall over times and I choose specifically at December 2014. The color used in the plot of Years vs. Total Rainfall shows total rainfall in mm. Red color indicates low rainfall and blue color indicates high rainfall. Meanwhile, the packed bubbles below the plot shows total rainfall by states. Color shows details about State and size shows total rainfall. The usage filters are just the same as previous three chapters. On the right side of the dashboard, I embedded a video showing flooding in Malaysia in December 2014.
For the fifth chapter, I choose a specific date which is February 2014. The first plot used here is the same as previous chapter. The second plot, weather stations vs. total rainfall, shows total rainfall (mm) in every weather stations for February 2014. I limited the stations to bottom 15 weathers stations that has low or no rainfall at all throughout February 2014. I’ve also attached a news on drought and water rationing issue in February 2014. You can interact with the dashboard using the filters provided.
In the last chapter, the plot shows total rainfall (mm) for each day in February and December 2014. Color shows details about month. If you want to look at daily rainfall record at different time, you can use the filters given. You can also select any weather stations that you want.
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