Will the flood in the river wash away the small fish?
According to the direct causes, it can be divided into rainstorm flood, snowmelt flood, ice flood, glacier flood, dam-break flood and soil landslide flood. Its characteristics are mainly manifested in the obvious process of flood generation and confluence, the problems encountered by flood propagation, flood storage and flood, the sediment carried by flood, the periodicity and randomness of flood and so on.
Storm flood and snowmelt flood in river flood are closely related to weather situation and climate change, and have obvious seasonality. In China, heavy rains and floods often occur in summer and autumn, which are generally called summer floods and autumn floods. Snowmelt floods often occur in spring, commonly known as spring flood or peach flood.
Extended data
In the middle and low latitudes, floods are mostly caused by rainfall. The river basin is large and controlled by river networks, lakes and reservoirs. When the flood peaks formed by different rainfall of different tributaries converge to the main stream, the flood processes of tributaries often overlap with each other, forming a flood peak with relatively long fluctuation.
The basin area of a small river and the storage capacity of the river network are small, and a rain will form a flood peak that fluctuates rapidly. Rain and flood can be divided into two categories. Flash flood is a sudden turbulence, rushing along the river and destroying everything. Mountain torrents are deadly destructive, and the other is slow-rising floods.
In mountainous ravines, due to the steep slope of the ground and riverbed, runoff and confluence are faster after rainfall, forming a violent flood peak.