21st of the yearTyphoon“du’an” landed off the coast of ilan, taiwan, at around 1750 hours on 28 december. Between midday and midday, on the morning of 29 september, the doo-ryong river will also land off the coast along the long sea in fujian。
As the “dudu duo” approaches, during the day of 28, there has been wind up on the coast of my province, ranging from 8 to 10, showers in the eastern region and, at night, the effects of the duo continue to escalate. The timing of the landing coincides with the astronomical tide, with wind, rain, tide and wave superimposed effects, which is an important reason why the power of the duo cannot be reduced. What needs to be looked at to protect the duo? The journalists interviewed the vice-president of the provincial meteorological station, moshien。
The wind and rain are more concentrated
In structural terms, in the typhoon family, the term “dough-eye” is counted as typhoon, which normally has a diameter of not more than 100 kilometres, and the diameter of the “dough-dink” is 140 kilometres. At the same time, the shape of the doppelganger is more symmetrical than that of the large loose structure of sudiro。
“the 7th class wind radius of `sudiro' was 430 km at its maximum, while the 7th class wind radius of `doo-du-du' was about 330 km. At present, the water cloud belts around the doo-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-hou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-dou-。
According to the path, typhoon doo-doo is south. “according to rainfall simulations from the provincial weather stations, this `dudu-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-du-do's impact is somewhat more severe than that of `sudiro'.” according to moowon, it is projected that the doo-chul could bring a maximum daily rainfall of 300 to 400 mm. "it's enough to cause flash floods, mudslides, etcGeological disastersPrevention must be strengthened.” he said that, in july of this year, a flood had been caused by rainfall above 120 mm at psb。
The provincial weather station expects that, as a result of the impact of the duo, wind power on the south-central coast of zhe china will continue to increase from 11 to 13 levels between the afternoons of 28 and 29 september, and on the north coast of zhebet there will also be major winds ranging from 8 to 10. In the middle of the night, between 28 and 29, the south-east coast and the zhenan zhenang zhang zhang zhenxian zhenxian zhang zhenxian zhang zhenxian zhenxianHeavy rainsSome heavy rains; others are moderate to heavy and local. On 30 march, the province was showered with heavy rains in the zheshi sector。
At 1500 hours on 28 december, the weather station in winzhou city issued an emergency alert for the dooku. On the night of the 28th to 30th, there will be heavy rains in wenzhou, with particularly heavy weather processes in the mountains; there will also be wind and storm weather processes in taizhou; and hangzhou city weather station will point to medium to heavy rains and heavy rains in parts of the mountains of hangzhou tomorrow. Between 28 october and 1 october, the city-wide cumulative rainfall generally ranged from 40 to 70 mm, with local rainfall of more than 100 mm, such as the astronomical mountain。
The astronomical tide is increasing the impact
Unlike “sudiro”, these days of august 16-18 of the agricultural calendar coincided with the rising tide of astronomical tides along the southern zhejiang and northern coasts of fujian, with wind, rain and tide “triples”, which could pour water into low-lying areas, while the coastal zone must be alert to potential urban flooding。
"this year the tide of the treasure river has become more spectacular, largely driven by the east wind of doo-hyun, and further exacerbatedStorm surgePossible harm.” according to moor park, the tide is high, and if the tide is to be observed, a safe area must be chosen。
Storm surges, which mean that when the typhoon approaches, the air around its centre rotates at great speed and at very low pressure, creating an upward gravitational pressure on the seawater, resulting in the sea surface of the centre of the typhoon being higher than the surrounding sea surface. In a period of high water levels, the safety of ponds, water gates and reclamation works will be seriously threatened。
In 2005, typhoon lung 19 landed in fujian after landing in taiwan, which led to a storm surge along many of the coasts of fujian and severe urban flooding and heavy loss of human life in fukushima county。
This is also one of the important reasons why the zhe china-south coast needs special attention, unlike other autumn typhoons, which may have serious impacts. Since 27 years, there has been an ultra-alert tide along the river along the coast of the city of wenzhou, and some areas, such as caveheads, xangnan, pyangyang and ryan, have been flooded by flooding。
Two landings are slowing down fast
According to the national ocean forecast station at 1600 hours on 28 june, due to the combined effects of super-strength typhoons, duhding and cold air, it is expected that between the afternoons of 28 and 29 afternoons, 50 to 200 centimetres of water will be added to the coast of yangjiang to fujian. Zhejiang tai, wenzhou, fujianfuzhou, yanda, quanzhou and xiamen storm surge warning level is red, zhejiang ka xing, hangzhou, shao xing, fujian ningde and zhongzhou warning level is orange, and shanghai, zhejiang ningbo, and hongshan warning level is yellow。
In the morning, the marine monitoring and forecasting centre in zhejiang province upgraded the wave alert to red and the storm surge alert continued to be red. Forecasts at 1600 indicate that between the night of 28 and the morning of 2900 hours, there will be a maximum wave of 6 to 8 metres in the southern and central waters of my province; between 40 and 150 centimetres of storm water will increase along the coast of my province; during the day 29 days, there will be peaks above 80 centimetres of local alert at the wainzhou, ryan, tsuenjiang and kammon tide stations; and, at the beginning of the afternoon 29 afternoon, waves and storm surges will fall. Pending the lifting of alerts, the relevant units continue to provide wave-proof measures and fishing vessels are requested not to leave the port without permission。
Before landing on taiwan's ilan, at 1700 hours on 28 november, the “du tung” had been reduced from a supertyphoon to a strong typhoon class. According to information from the central meteorological observatory, between 0000 and 1820 hours, between 100 and 300 mm precipitation occurred in northern taiwan, 565 mm precipitation occurred in taipei hill, yilan county, and 512 mm in fukuyama, nueva norte city。
According to the latest statistics from the provincial weather station, between 0800 and 2100 hours, the province was dominated by shower weather and local heavy rains in ningbo. The largest rainfalls are 76 mm in hilly villages and 75 mm in cold mountains. 15 mm precipitation in hangzhou city。
According to forecasts from the central meteorological agency, after landing on taiwan, the duo, albeit abating, is heading straight for fujian coast, and after a second landing, the duo will quickly weaken, move into jiangxi by night of 29 and reduce to tropical depression. As a result, the impact on our province of the storm and storm that was selected for the 29-day landing will begin to diminish in 30 days. On october 1st, provincial stations forecast that a cold air in the north will be visiting, leading to a decrease in the temperature, and by october 2 i will be able to save the weather and travel happily during this holiday。
