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  • 2 days ago
Mengqian Lu, Professor of Hydrometeorology and Director of the World Sustainable Development Institute at the Hong Kong University of Science and Technology, discussed the impact of Typhoon Bavi. She explained that despite the storm weakening, its extensive circulation and abundant moisture continue to pose significant risks, including heavy rainfall, flooding, landslides and thunderstorms. She also warned that flooding and landslides may continue to develop in the days ahead, as rivers and saturated ground often take time to respond after the heaviest rain has passed.
Transcript
00:00Chen Tong reporting there. Let's get more now with Lu Mencian, who's the professor of hydrometeorology at the Hong Kong
00:07University of Science and Technology.
00:09Thank you so much, Professor, for joining us. You're actually in Shanghai at the moment. What's the situation been like
00:15in that region?
00:17Yes. Thank you for having me here today. I actually came to Shanghai two days ago to teach for the
00:27Hong Kong UST Shanghai Center.
00:31Right now, we're still experiencing strong gusts of winds. And actually, over the past two days, we didn't have too
00:39much rain, but the winds were really strong.
00:42So many flights were actually canceled, including my original return flight to Hong Kong this afternoon.
00:49Yeah, there's just been a huge knock-on effect, hasn't there, on millions of passengers and people across the region.
00:55Now, Babi has actually weakened. Does this mean that the worst of the danger has now passed?
01:00Or is the huge amount of moisture that is still in these heavy rain bands still a major concern?
01:06Yes. Unfortunately, I don't think that the situation is, you know, the danger is completely gone.
01:15Because as the Babi is weakening, it doesn't mean its influence is over.
01:20Because we saw it's made landfall. And also in Shanghai, you know, there's a lot of discussions that actually there's
01:29not a lot of rainfall.
01:32But because Babi is a large system and with a broad circulation, so there's still strong moisture transport.
01:42And because it's size and it's still graining a lot of moisture from the ocean and could continuously to cause
01:53a lot of heavy rainfall.
01:54And that means that there still exists some flooding risk, landslides, and possibly severe thunderstorms, also swiping over a wider
02:08area.
02:09So I don't think that, you know, the danger is completely passed.
02:13And indeed, once the storm actually passes, is there still a high risk of flooding and landslides still happening later?
02:22Yes, indeed, because it takes time for hydrological processes to complete.
02:28So there's heavy rainfall persisted for several days.
02:31And then, you know, the watershed will collect the rainfall and converge into the river.
02:37And, you know, there could be delayed in possible floods or, you know, even landslides because the soil could get
02:48moist over the next few days.
02:51And there's still potential risks.
02:54All right. Well, we'll have to leave it there.
02:55But thank you so much for your insights, Professor Lu Mencian from the Hong Kong University of Science and Technology.
03:02Thank you so much.
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