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Loudi induced disasters in mountain torrents and torrents and Prevention Countermeasures


Abstract: Loudi City is located in central Hunan, have jurisdiction over two counties and two cities an area population of 3.99 million, the geographical coordinates of longitude 110 ° 45'40 \'05 \, post, flat landscape taste areas.
Keywords: Loudi torrents induced disaster prevention countermeasures

Loudi City is located in central Hunan, have jurisdiction over the cities counties and a district population of 3.99 million, the geographical coordinates of longitude 110 ° 45'40 \28 ° 14'27 \ A basic condition
(A) the basic characteristics of topographic
City landscape terrain was from west to east, north-south mountain confrontation into a central low-lying \film, Gang Qiu staggered clusters, flat features a combination of cotton development.
(Ii) Climate and flood disasters
I municipal area in the subtropical humid monsoon climate, annual average temperature at 15.3 ~ 17.0 ℃, annual precipitation is usually in the 1300 ~ 1400 mm, in the urban areas was more pronounced in the geographical and seasonal distribution.
Annual precipitation decreasing from the west east east west than the eastern hilly plains, mountains, Xinhua dual forest, the Lost of 1800 millimeters, Xinhua County, Lengshuijiang City 1400 mm, Lianyuan City, Lou Xing District, City of 1350 millimeters, two peaks of Yongfeng, the leaves about 1300 mm. Xinhua's Bear Mountain and the ancient west of Taishan, the area north of Tian Ping, Lianyuan White Horse Reservoir area is the urban area of three rainy, Elsa and double Louxin area as the city flower of the door the two drier areas.
Due to monsoon climate, precipitation Loudi very uneven distribution of each season,[link widoczny dla zalogowanych], 4 to 6 months a high concentration of rainfall is the main city is the torrential flood disaster-prone period. This three-month average precipitation is 550 ~ 600 mm, accounted for 42 ~ 44%. 7 September is the city dry season, rainfall between 250 to 300 mm, but much to heavy rain precipitation, the formation of flooding.
Since the 16th century, 500 years, there were 148 floods, including 25 years of the 16th century, 17th century 32 years, 24 years of the 18th century, 19th century 24 years, 45 years of the 20th century, of which 1912 1924, 1926, 1931, 1949, 1954, 1969, 1973, 1988, 1990, 1996, 1998,[link widoczny dla zalogowanych], the most severe floods. From the flood disasters of geographical distribution, due to the topography of the city, major floods occurred in the capital Jiang, Lianshui, measured water, water in central coastal low-lying Mekong Department, that the distribution along the middle of \Type ribbon basin, including Shenzhen, the oil stream, Lang Overall, River, the plum, Yangxi, Cha River as the main parts of the same district in central Xinhua Qiugang Ping to the top three, Shima Hill, six acres of ponds, jetty Tong, Mao Tong, Whitehorse, Yang City, the main parts of the original area Lianyuan Qiugang Ping to Hongshan, cursory, Yongfeng, Azusa doors and other major areas of bimodal Qiugang Ping same district, and the northern fukou Lianyuan, Seven Stars ,[link widoczny dla zalogowanych], Anping,[link widoczny dla zalogowanych], Mekong and other major areas of the northern mountains and peaks in the low-lotus, grid and other regions of the eastern area of low hills. Over the years, especially since the nineties of the three catastrophic floods (1990, 1996, 1998), the vast majority took place in these areas, and population density in these areas, and industrial and agricultural, transportation, finance and trade, commerce and developed in case of floods, the disaster is devastating.
1990 年 11 to 16 June, the city Heavy rain and heavy rain, causing the city's 168 townships (after the withdrawal of District and Township) 2525 Village 74.5 mu <LABEL class = lb onclick = \('farmland');\ 1996 year is the worst calamity in our city for one year. June 1 and July heavy rain in mid, 70% of the city's townships and 50% of the population affected, 40% of the crop affected, 20% of the crops, the direct loss reached 2.55 billion yuan.
1998, the city is also a continuous torrential rainstorm, extremely frequent, the city has on April 30, May 8, May 21 ~ 22, 6 12 ~ 16, June 22 ~ 23, June 27 and July 30 8 widespread heavy rain and heavy rain falling, in which the month of May 6 the loss of several particularly severe torrential rainstorm, Lianyuan three consecutive attacks suffered heavy rain torrents. 8 year storm scour the city in 77 towns and 2,532 villages suffered flood,[link widoczny dla zalogowanych], a total of 18 000 houses collapsed, 38 people died in an area of 87 hectares of crops affected, disaster area of 50 mu, 1.6 million mu of crops were destruction of a medium-sized reservoirs, small I-type reservoir a small II reservoir 35, there are 609 mining <LABEL class=lb onclick=\the railway two 52-hour total of 1.68 billion yuan of direct economic losses.
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