China's drought and waterlogging disasters in
the past 500 years, the waterlogging of the
Yangtze River Basin, and the online map of
drought in North China, Southern China.
Floods usually refer to a type of disaster that causes agricultural or other property and casualties due to
flooding of rivers and flooding of fields and urban and rural areas or flooding of low-lying land due to
long-term rainfall. Floods include two major types of floods and disasters. Floods refer to the phenomenon
of flooding of rivers and rivers, flooding farmland and urban and rural areas, and endangering people's lives
and property. Disaster relief refers to the accumulation of water and runoff caused by long-term rain or heavy
rain that inundates low-lying land. Heavy rains and floods in China occur mostly in the south of the Yangtze
River and the coastal areas of South China, with the most from the north of the Yangtze River to the middle
and lower reaches of the Yangtze River. The northern part of China has a dry climate with less rain, but under
the influence of abnormal weather, floods often occur. Long-term, wide-scale continuous rain or frequent heavy
rains can cause floods. There are two main areas where heavy rains are concentrated in China: one is the Liaodong
Peninsula, one Shandong Peninsula, and the southeast coast; the other is the Daxinganling, Taihang Mountain, and
Wuyi Mountain. In addition, the southern foothills of the Yinshan, Qinling and Nanling mountains are also frequent
areas of heavy rain. The floods in China mainly occurred in the plains of the Pearl River, the Yangtze River,
the Huaihe River, the Yellow River, the Haihe River, the Liaohe River and the Songhua River, and the Sichuan and
Guanzhong Basins. The flooding disasters mainly occur in the plains and basins in the east, such as the Sanjiang
Plain, Nenjiang Plain, Liaohe Plain, Hetao Plain, Guanzhong Plain, Yuzhong Plain, Huaibei Plain, Jianghan Plain,
Yangtze River Delta and Pearl River Delta.
Drought disaster: In the long period of time, due to the serious shortage of precipitation, the soil loses water
due to evaporation, the river flow is reduced, and the normal crop growth and the severe weather phenomenon of
human activities are destroyed. As a result, the crops and fruit trees are reduced. Disasters such as drinking
water for people and animals and lack of industrial water. From a disciplinary point of view, drought can be
divided into four categories: meteorological drought, agricultural drought, hydrological drought and socio-economic
drought. Drought, especially the seasonal drought, will cause huge losses to the agriculture and animal husbandry.
The distribution of drought in China has obvious regional characteristics. The severe arid regions are mainly
distributed in the Huanghuai area, the southern part of Zhejiang and Jiangxi, the northern part of Guangdong
and Guangxi, the Loess Plateau and the central Guizhou.