National geological disasters in the first half of 2000 and the trend prediction of geological disasters in the second half of 2000.

Announcement No.40 of the Ministry of Land and Resources, 20 1 1

20 1 1 In the first half of the year, a large number of geological disasters occurred in China, with relatively few casualties and serious economic losses. Geological disasters were aggravated in June, because most parts of the country were prone to drought from June to May, and drought and flood turned sharply in June, and the disasters in southeast, southwest and east China were serious. 20 1 1 The disaster prevention situation is grim in the second half of the year, and July-September is the period of high incidence of geological disasters, especially the possibility of sudden geological disasters caused by extreme weather events. Although the period from June 5438+00 to February 12 is a low-incidence period of geological disasters, there will still be sudden geological disasters. It is predicted that the hardest hit areas of geological disasters in the second half of the year may mainly be in the southeast, south-central and southwest regions. The risk of geological disasters in Wenchuan earthquake-stricken area and Three Gorges reservoir area is high, which needs to be paid attention to. At the same time, we should attach great importance to the impact of heavy rainfall brought by typhoons (tropical storms) on the southeast coastal areas.

First, geological disasters

(1) The overall disaster situation in October11June

20 1 1 year 1 to June, there were geological disasters 107 10 in China, including 8495 landslides, 65438 collapses +0355 mudslides, 608 ground collapses and 65438 ground fissures. There were 50 geological disasters that caused casualties, including 97 deaths, missing 13 and 49 injuries; The direct economic loss was 939 million yuan. Compared with the same period of last year, the number of deaths, missing persons and direct economic losses all decreased (table 1).

Table12011116438+06438+06438+06438+06438+

1~ from June, the national * * * successfully predicted geological disasters 156, avoiding 4674 casualties and direct economic losses of 269 million yuan.

Geological disasters were distributed in 26 provinces (autonomous regions and municipalities) from June to June. According to the frequency of occurrence, they are Hunan, Jiangxi and Zhejiang (Table 2). According to the number of deaths and missing persons, they are Guangxi, Hubei and Shanxi (Table 3). According to the direct economic losses caused, Gansu, Hunan and Hubei are in turn (Table 4).

Table 2 Statistical table of geological disasters in various provinces from 2011to June Unit: From.

Table 3 Statistics on the number of deaths and missing persons caused by geological disasters from 2011to June Unit: people.

Table 4 Statistical Table of Direct Economic Losses of Geological Disasters from 201/KLOC-0 to June Unit: 10,000 yuan.

(2) June disaster

In June, there were 8327 geological disasters 10268, including landslides, 65438 collapses +0208 mudslides, 86 ground collapses, 53 ground fissures and 6 ground subsidence. There were 32 geological disasters that caused casualties, including 49 deaths, missing 10 and 24 injuries; The direct economic loss was 422 million yuan. Compared with the same period last year, the number of deaths, missing persons and direct economic losses decreased (Table 5). The worst-hit provinces are Hunan, Hubei, Fujian, Jiangxi, Anhui and Zhejiang.

In June, the national * * * successfully predicted 40 geological disasters/kloc-0, avoiding 3007 casualties and direct economic losses of 63.69 million yuan.

Table 5 20 1 1 Comparison with basic geological disasters in the same period last year

Two. Characteristics of geological disasters from June to June, 65438

(1) Compared with the same period of many years, the casualties are the least and the economic losses are more serious.

Compared with the same period of many years since 2005, the number of geological disasters in June of 20 1 1 ranked second, lower than 2010 (19563); The number of deaths and missing persons due to disasters is the lowest in the past years (108); The direct economic losses caused by disasters rank fourth, lower than 20 10 (187 billion yuan), 2006 (167 billion yuan) and 2005 (157 billion yuan). From 20 1 1 to 1 to June, the number of geological disasters in China is relatively large, with relatively few casualties. This is due to the great attention of local party committees and governments, taking various effective measures to implement the responsibility of prevention and control of geological disasters, and strengthening monitoring and early warning, among which geological disaster emergency drills have played an important role.

(2) Compared with the whole year, the disaster situation in June was aggravated.

From June to May, 5438, there were 442 geological disasters, with 5 1 person missing and direct economic loss of 517198,000 yuan. In June, there were geological disasters 10268, with 59 people dead and missing, and the direct economic loss was 422.298 million yuan, accounting for 96% of the dead, 54% of the missing and 45% of the direct economic loss. The reason is that the drought in most parts of the country from June to May in 5438 led to the cracking of the surface soil, which easily caused geological disasters once it met with water. In June, droughts and floods turned sharply, and heavy rains fell in the south. Hunan, Hubei, Fujian, Jiangxi, Anhui, Zhejiang and other places were seriously affected. Especially in Hunan, there were 8727 geological disasters in that month, accounting for 85% of the national total.

Three. Examples of major geological disasters

(1) On March 2, 2065438+01,a landslide occurred in Salta Square, dongxiang county, Linxia Prefecture, Gansu Province, with a scale of 65.438+0.8 million cubic meters, causing direct economic losses of 443 million yuan.

(2)20 1 1 On May 9, 2000, the rainfall in the Guangkengcao quarry of Luojia Village Committee in quanzhou county, Guilin City caused a massive landslide with a scale of 200,000 cubic meters, which killed 22 people and injured 1 person, resulting in a direct economic loss of 3.5 million yuan.

(III) On 2011June 10, a landslide occurred in Zhanggongtang Formation, Yuexingwan Village, Majitang Town, Taojiang County, Hunan Province, killing 8 people.

(IV) 2011On June 26th, a landslide occurred in Xiaodonggou, Baiyuli Village, Gaoxin Township, Daixian County, Shanxi Province, with a scale of 52,200 cubic meters, causing 9 deaths and 4 injuries.

Four, the second half of the geological disaster trend forecast

According to the law of geological disasters for many years, July to September is the period of high incidence of geological disasters, and the situation of disaster prevention and mitigation will be more severe, especially the possibility of sudden geological disasters such as landslides and mudslides caused by extreme weather events is very high, so it is necessary to strictly guard against group deaths and injuries. Although the period from10 to12 is a low-incidence period of geological disasters, we should still pay attention to the prevention and control of geological disasters and not take them lightly. In the southern region, which has suffered from drought for decades, the continuous drought has led to loose cracks in rocks and soil. Once there is heavy rainfall, the probability of geological disasters such as collapse, landslide and debris flow will increase obviously. In addition, great attention should be paid to prevent geological disasters caused by water conservancy and hydropower, railways and highways, mining, slope cutting and other human engineering activities.

It is predicted that the hardest hit areas of geological disasters in the second half of the year may be mainly in some mountainous and hilly areas of Sichuan, Yunnan, Guizhou, Chongqing, Hunan and other provinces (cities), with special attention paid to the severely affected areas of Wenchuan earthquake, followed by Fujian, Zhejiang, Jiangxi, Anhui, Guangdong, Guangxi, Shaanxi, Gansu and Shanxi. It is necessary to further strengthen the prevention of geological disasters caused by water level fluctuation, rainfall and other factors in the Three Gorges reservoir area, and attach great importance to the impact of heavy rainfall brought by typhoons (tropical storms) on the southeast coastal areas.

Ministry of Land and Resources (MLR)

20 1 1 July 6, 2008