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TOPIC: Your experience on extreme events

Your experience on extreme events 6 years 3 months ago #330

Second flood in less than one month in Milano.

Here a newspaper article, in italian, but pictures and videos say it all
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Your experience on extreme events 6 years 3 months ago #333

Dear All

Bangladesh is known for its floods. Almost every year, many parts of the country are inundated by normal floods. However, after every 7 to 10 years, devastating floods occurred and disrupt the normal life. I remember the 2007 floods when we were doing a research on the cause of floods, pattern of inundation, its characteristics and performance of flood control works of Dhaka city. We visited the various flood control structures of the city and surprised to see various issues which are mostly created by city dwellers and responsible authorities. One of them was the illegal encroachment to the water retention areas of the permanent pumping station. The city corporation also filling the retention areas near the embankment. We also find the miss-management of the solid waste dumping and cleaning of the city. The main canal near the pumping station in the south is full of garbaze. With this field visit during the flood 2007, I have realized that floods can be managed much better way than it was practiced in Bangladesh.
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Your experience on extreme events 6 years 2 months ago #339

Hello all,
Taiwan is geographically situated directly in the track of northwest Pacific typhoons where the number of tropical cyclones is the highest among all ocean basins. According to previously determined statistics (1958–2010), there is an average of 29.2 typhoons form each year, 3.4 of which impact Taiwan, and 76% of the cases happen during the months of July to September (summer). When typhoons or torrential rains occur, severe inundations happen if the incoming rainfall exceeds the design rainfall intensity of the storm sewer system. For instance, in 2009, Typhoon Morakot brought record-breaking precipitation, the maximum total accumulated rainfall was 3060 mm within the whole affecting 6-day period, the maximum observed daily rainfall for 8 August and 9 August were both more than 1000 mm, which led to widespread inundation damage and flooding from continuous rainfall. Another case is from August 28 to August 30 2013, tropical cyclone Kong-Rey battered the Taiwan Island, pouring enormous amounts of rain on the heavily populated west regions, causing severe flooding in the central and southern Taiwan, and then it was fully dissipated by early August 31. Although typhoon Kong-Rey was dissipated on August 31, the typhoon resulted in strengthened southwesterly monsoonal flow from the northern South China Sea toward Taiwan. On August 31 and September 1, the typhoon-induced southwesterly flow brought extremely heavy rainfall toward Taiwan, leading to the most serious flooding events in southern and central Taiwan over the past 40 years.

In my university days, it was well remembered that a year over the weekend, there was a typhoon with howling wind and driving rain hitting the northern Taiwan. At that time because our university was located in low-lying area and close to the river banks, our school was flooded seriously. After that typhoon-induced severe flooding event, I have made up my mind to do research in concerning meteorology and hydrology.

Tropical Storm Kong-Rey: 3 Dead as Storm Floods Taiwan


Typhoon Morakot disasters
Last Edit: 6 years 2 months ago by jim2420. Reason: Short modification
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Your experience on extreme events 6 years 2 months ago #357

sahidul wrote:
I have observed heavy rainfall during the summer monsoon over Mumbai on 26 July 2005 event. It is very unique. The rainfall amount of 944 mm is record amount for a single-day rain event for a megacity (population over 10 million). Mumbai is the most populated city and the commercial capital of India; this rain event caused 409 deaths and an unprecedented loss of $1 billion to the socio-economic sector.

Re-reading these very interesting experiences, and remembered that we had one contribution on the flickr pool from the event. Do you know if there are more material from the event online? Before/after photos, aftermath, rebuilding?

Matti
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Your experience on extreme events 6 years 2 months ago #358

sazzad176 wrote:
Hello All,
Heavy rainfall event in port city Chittagong, Bangladesh
Extreme rainfall event occurs in some places of Bangladesh which causes flood and landside in hilly region. I want to share with all f you such a rainfall event of in port city Chittagong, Bangladesh which occurred in June, 2007. Rainfall event continued around 48 hours (10-11 June, 2007) and total rainfall recorded 405 mm on 11 June, 2007.
Consequences:
This heavy rainfall caused landslide and total 120 people were died. This heavy rainfall also caused urban flood and water logging problem.

Hi Sazzad,

Since you mentioned that you're involved in flood forecasting, I was wondering how much of an advance warning it was possible to get re. Chittagong event?

Matti
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Your experience on extreme events 6 years 2 months ago #360

Hi Mati,
We are forecasting 5 days leadtime uisng deterministic modle (mike 11) and 10 days probabilistic forecast. For Chittagong , It happened due to heavy rainfall and subsequent landslide. People, who lived at the foot of hill were mostly affected.


Regards

sazzad
Last Edit: 6 years 2 months ago by sazzad176.
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