June 13, taking advantage of the "rain in the air" in the sunny days, the reporter came to the provincial meteorological bureau, asked the relevant experts to review this year's endless rain, to explore the ins and outs of it.

Almost 100 days of rain this year

The rain is continuous, as if it rains every day. That's how many people feel, but really, how many days of rain have there been so far this year?

Provincial Climate Center Director Liao Yufang said that since this year (January 1, 08:00 to June 11, 08:00), the province's average rainy days of 98.7 days, this data ranks in the meteorological records since (1951) the history of the same period of time the sixth highest, Xiangnan than the north of Xiangnan rainy days a little more. Among them, Miluo, Xinhuang, Hongjiang, Zixing and other 14 counties (cities) rain days in the local history of the same period in the first 3 high.

On the provincial climate center's meteorological history record, the most rainy days was in 1970, that year during the same period, a **** rained for 105 days.

As for the amount of rain so far this year, also ranked the eighth highest in the same period in history. According to the provincial climate center statistics, so far this year, the province's average precipitation of 830.4 mm, 18.5 percent more than normal.

Reviewing the rainstorms from Jan. 1 to the present, there have been seven rainstorm processes affecting more than 10 counties and cities: from March 4 to 5, April 11 to 13, April 28 to May 2, May 8 to 10, May 12 to 14, May 29 to 30 and the recent June 9-11, respectively.

More rainy days, more cloudy days and exceptionally few sunny days

Does such a long period of rainy days with so much rain indicate an unusual weather condition and is it considered an extreme weather and climate event?

Liao Yufang said that in layman's terms, extreme weather and climate events refer to small probability events that occur once in 50 years or once in 100 years, and for the time being, what qualifies as anomalous and extreme is the fact that from January to March, the number of hours of sunshine and the number of days hit a record low.

According to the Provincial Climate Center, from January to March, the province's sunshine hours were only 100.8 hours, 86.6 hours less than normal, a record low since 1951. In addition, there were only 18.6 days of sunshine on average in three months, 16.2 days less than normal, and the number of days of sunshine was also at a record low since there were meteorological records.

There were many rainy days and cloudy days, with especially few sunny days, adding to the feeling that this year just doesn't seem to be clearing up.

Along with the rain came low temperatures. According to the provincial climate center, so far this year, the province's average temperature is about 1 degree Celsius lower than normal.

The rain, coupled with low temperatures, may have made people feel more humid, the more they feel that this rainy season is long and hard to endure.

Rain more and "water dragon year" has nothing to do

Faced with some endless rain, there is a network news, 2012 is the year of the Chinese lunar calendar, the five elements of water, known as the 60 years of water dragon water dragon year, "the I Ching", said "non-riding the back of the dragon, the flying dragon! Into the sea", is the water of the year, so this year's rain will be particularly more.

From the climate data on the analysis of the province this year, the average rainy days since 1951 for the sixth highest, the average rainfall for the eighth highest, the intensity of rainfall can not be said to be one in 60 years.

Liao Yufang analysis, rainfall is cold air and warm and humid air flow **** with the results of the role. This year, due to the atmospheric circulation anomaly, cold air frequently, the south of the water vapor transport active, cold and warm air convergence in the southern region, resulting in continuous rain.

Another reporter understands, "water dragon year" is known as the water of the year, in folklore, meaning "smooth wind and rain, the country and the people", and no "rain" said.

The large number of rice bugs is rare in history

"This year's stormy weather appeared early, the degree of heavier, more widely distributed, the production and life caused a greater impact." Provincial Meteorological Bureau of Emergency Response and Disaster Reduction Division Senior Engineer Lee hoe week so that the impact of this year's rain.

Because the rainstorm process began early, the province this year, the flood is also earlier than in previous years, March 8, 10:00, Changsha Station, Xiangjiang River, the earliest since 1998, a flood process, the flood peak water level of 32.3 meters. Meanwhile, frequent and high-intensity rainfall has led to high soil moisture content and frequent flash floods and geologic disasters.

There were many cloudy and rainy days with little sunshine, slowing plant growth and affecting crop yields. According to data from the agriculture department, the fertility period of early rice in central and north Hunan is expected to be about 2 days slower due to rainy and low sunshine weather.

The director of the Provincial Meteorological Bureau of Agricultural Meteorology Center, Shuai Fine Qiang, also pointed out that the large number of rice fly insects so far this year has been historically rare, due to the increased difficulty of control of rainy weather, resulting in rice pests and diseases is the heaviest occurrence in recent years, the widest range of the year.

The latter part of the rain concentrated period:

Late June to early July

"This year, both drought and flooding in our province may be more serious than last year." Liao Yufang believes that the latter part of the rain is relatively concentrated in late June to early July, in addition, during the summer, Xiangdong, Xiangnan by the impact of the typhoon may appear strong rainfall weather.

Lee hoe week suggested that late June to early July will be concentrated rainfall period, should be early to guard against possible torrential rainfall and flooding and its induced flash floods, landslides, mudslides and other disasters, at the same time, fully prepared to defend against typhoons. In order to guard against the end of the rainy season in mid-July may occur after the hot weather, the need to do a good job of reservoir water storage and water conservation work, and timely implementation of artificial rain to combat drought.

Zhou Hui, chief forecaster of the provincial meteorological station, said that in the next 10 days, the north of Hunan cloudy and less rain, southern Hunan more showery precipitation, of which the 15th to 16th precipitation is the strongest, Chenzhou, Yongzhou localized torrential rain. Due to the heavy precipitation in southern Hunan over the past few days, the soil is loose and needs to be strengthened to guard against flash floods and geological disasters that may be caused by this heavy precipitation.

Soil water content tends to be saturated, and the water level of rivers and lakes is high

Prolonged rainfall has led to frequent dangers

Reporter Liu Dexin

Prolonged rainfall has posed a greater pressure on the province's flood control work.

The provincial defense index introduced that under the influence of continuous rainfall, soil water content tends to be saturated, the water level of rivers, lakes and reservoirs is high, and dangers are frequent in many parts of the province.

Water conservancy projects are storing more water, and the flood control capacity has declined. According to data at 8:00 p.m. on June 11, the province's nine major large reservoirs such as Wuqiang Creek, Tsuge Creek, total water storage of 13.4 billion cubic meters, 2.7 billion cubic meters more than the total storage of 10.7 billion cubic meters at the same time last year.

River bottom water is high, very prone to flooding over the alert level. June 9, Dongting Lake Chenglingji station water level of 30.10 meters, higher than the average value of the same period of the calendar year by 2.6 meters, higher than the same period last year by 5.13 meters. After the heavy rainfall process from June 9 to 11, the Xiangjiang River on the line and tributaries of the shoe generally appeared to exceed the warning level of flooding.

Soil water content tends to be saturated, landslides, reservoirs out of danger probability suddenly increased. According to the provincial defense index, June 4 to 5, the province occurred five dangerous: Hanshou County, South Lake Skimming River Zhujiaba embankment tunnel perforation bulging water; Luxi County, Dalan Township, Xintian Village landslide, resulting in one death; Shaoyang City People's Hospital retaining wall deformation crushed houses, resulting in one death; Zhangjiajie City, Wulingyuan District, Xiehe Township, such as the land land valley landslides.

This year's rainfall characteristics

Reporter Liu Dexin

This year, the province's rainfall is mainly cloudy and rainy days, the process is obvious, uneven spatial and temporal distribution of the obvious characteristics, the overall presentation of the north and south of the more, the central part of the less, the east of the relatively more, the west of the relatively less of the basic situation.

According to the Provincial Hydrological Bureau, this year's rainfall in the distribution of time, January, March, May, obviously more, February, April less; in the spatial distribution, the province only Shaoyang City, the rainfall is less than the average of the same period of the previous year nearly 20%, other areas are more than the average of the same period of the previous year. Among them, the rainfall in Yiyang City is more than 30%, and more than 20% in Changsha, Zhangjiajie and Autonomous Prefecture.

Since April 1, the province's cumulative average rainfall of 519 millimeters, 12 percent more than the average value of 463 millimeters over the same period in previous years. The province's largest cumulative rainfall station is Huangshan Station in Taoyuan County, with 1,462 millimeters; Hengshan Station in Hengyang City has the smallest cumulative rainfall of 505 millimeters.

Reproduction of 1998 rain water

Reporter Liu Dexin

According to the provincial hydrological bureau statistics, the province's cumulative average rainfall of 800 millimeters from 8:00 a.m. January 1 to 8:00 p.m. June 12 this year, the province's cumulative average rainfall of 708 millimeters over the same period of the calendar year, an average value of 13% more. The latest analysis of the provincial hydrological bureau, rainfall so far this year, than the same period in 1954, 840 mm slightly less than 4.8%, than the same period in 1998, 780 mm slightly more than 2.6%.

Generally, floods in the middle and lower reaches of the Yangtze River occur earlier than floods in the upper reaches and are not easily encountered on a wide scale. In normal years, regional floods mostly occur in the Yangtze River basin. If the weather is abnormal, the upper reaches of the flood in advance, or the middle and lower reaches of the flood delayed, in the case of the river and lake bottom water is too high, the upper reaches of the flood in succession, the flood process overlap, the dry tributaries of the flood repeated encounters, the formation of high peaks and large amount of basin-wide floods, such as in 1931, 1954 and 1998 floods, all belong to the basin-wide floods.

Since the flood this year, the lower reaches of the Yangtze River water level continues to rise. 8:00 on June 9, Cuntan, Yichang, Chenglingji and other control stations water level reached 164.39 meters, 44.98 meters and 30.10 meters, of which the water level of Chenglingji station than the average of the same period of the previous year is higher than the average value of 2.6 meters, than the same period last year, higher than 5.13 meters. The Yangtze River Defense Administration analyzed that the rain and water conditions so far this year are relatively similar to those of 1998 and 1954.

The 1998 floods are well remembered by many people.

Provincial Hydrological Bureau, deputy director of the water situation, Li Binghui, January to March 1998, the middle and lower reaches of the Yangtze River rainfall abnormally high; April to May, the upper reaches of the Yangtze River rainfall is high.1998 big water, with the following characteristics.

The flood occurred in a wide range of areas.In 1998, the upper and middle reaches of the Yangtze River basin and the 5 rivers of Poyang Lake and the 4 waters of Dongting Lake all experienced large floods, and floods exceeding the maximum water level and maximum flow rate of the measured records occurred in many major control stations and tributaries in the middle reaches of the Yangtze River, which was another basin-wide flood after 1954.

The flood occurred early. from January to March 1998, the main stream of the middle and lower reaches of the Yangtze River had the highest water level in the same period in history, and the peak flow of the Xiangjiang River in the Dongting Lake system and the Ganjiang River in the Poyang Lake system in mid-March was the largest in the whole year.

The number of flood peaks was high and the flood magnitude was large. Eight floods with peak flow over 50,000 cubic meters per second occurred at Yichang Hydrological Station in the upper reaches of the Yangtze River, and the maximum 30-day flood volume was about one in a hundred years, while the total amount of floods and the maximum 60-day flood volume from June to August exceeded those of 1954, and the Hankou Station in the middle and lower reaches of the Yangtze River was close to that of 1954.

The flood level was high and the high water level lasted for a long time. The water level in the middle and lower reaches of the Yangtze River from Shashi to Luoshan and from Wukou to Jiujiang Hydrological Station exceeded the highest water level in history and was also 0.55 to 1.25 meters higher, and the duration of exceeding the highest water level in history lasted for more than 40 days. The water level in most areas of Dongting Lake and Poyang Lake system also generally exceeded the highest water level in history, and the control stations of the two lakes, Chenglingji Station and Hukou Station, exceeded the highest water level in history for a period of up to 29 days.

The flood encounter was bad. 1998 floods in the upper middle and lower reaches of the Yangtze River and floods in Dongting Lake and Poyang Lake were badly encountered. from mid-June to late July, the floods in the two lakes were superimposed, and the water level in the middle and lower reaches of the Yangtze River was persistently high, and in August, many floods occurred continuously in the upper mainstem of the Yangtze River, especially the sixth flood in the process of downstream procession, firstly, it met with floods in the area of the Three Gorges and the Qingjiang River, then with floods in the Yuanjiang River in the Dongting Lake system. Dongting Lake system Yuanjiang River, river floods meet, through the Wuhan river section, and then superimposed with the same period of arrival of the Hanjiang River floods, the flood combination is exceptionally bad. Dry and tributary floods many encounters, superimposed, combined into a peak high volume of multi-peak flood process.

Rain in the "flare gun"

Correspondent Yang Ling Xie Lifang

Since the beginning of this year, the province's weather is unusually complex, frequent disasters, has appeared in the low-temperature rain, snow and sleet, thunder and lightning, wind and hail, the spring cloudy rains, the May low temperatures, torrential rains, as well as flash floods and geological disasters. The province's meteorological department to give full play to the "news tree" and "signal gun" role, so far, has sent free weather warning SMS 59.74 million people.

Hunan is one of the most frequent and serious meteorological disasters in the country, especially flash floods and geological disasters caused by heavy rainfall. The province has 11 meteorological satellite ground receiving stations, 7 new generation Doppler weather radars and 3011 regional meteorological observation stations. The modern and comprehensive meteorological observation network consisting of ground and high-altitude meteorological detection networks and lightning monitoring networks has improved the monitoring and early-warning capability of meteorological disaster defense in the province.

Since this year, the meteorological department has made every effort to do a good job in predicting and forecasting the warning of major weather processes, accurately predicting the low-temperature rain, snow and sleet at the beginning of the year, the rain-concentrated period in May and the low temperatures in May, and accurately predicting seven large-scale heavy rainfall weather processes. This year **** issued 139 issues of weather forecasting type service materials, for the provincial government disaster prevention and mitigation decision-making and provincial flood control finger flood control scheduling played the role of outpost and staff.

In order to improve the meteorological disaster warning information dissemination capacity, the meteorological department with the help of television, network, radio, newspapers, text messages, microblogging and other media and information platforms, multi-channel, multi-means to release weather forecasts and warning information. At present, the province's cell phone weather SMS warning responsible users have reached 170,000, the establishment and improvement of cell phone weather warning information quickly released "green channel", at the same time, after 22:00 p.m. red warning repeatedly sent to strengthen the reminder.