Natural causes of summer floods in the lower reaches of the Rio Grande.

The terrain is flat and low. It flows through the Great Plain and the coastal plain of the Gulf of Mexico, meandering slowly, and the estuary forms a typical delta.

2. Climate

There are many rainstorms in summer, and the flood season appears in June ~165438+1October.

3. Hydrology

There are many tributaries in the river, with large amount of water and high sediment concentration.

Extended data:

Environmental protection of Rio Grande;

The Rio Grande often overflows, and the riverbed is constantly diverted to the south, leaving a large area of alluvial land, which has triggered the contradiction between the United States and Mexico for land. Although the two countries signed a treaty in 1889, it was not until 1963 that the two countries signed a new treaty and decided to build a waterway to fundamentally prevent the riverbed from being diverted, and the excavation cost was shared equally between the two countries.

In order to solve the problem of rational utilization of the Rio Grande, the two countries signed treaties in 1906 and 1944 respectively, which defined the principles of equitable distribution of water resources and division of water systems. According to the treaty, the United States guarantees to supply 2.6 million cubic meters of water to Mexico every year, and in case of irrigation system problems in dry years, try to ensure that the water supply of Mexican farmers is not lower than that of American farmers.

The treaty also stipulates that the two sides will jointly build necessary projects, and the costs will be shared according to the proportion of projects used by countries. Since 1930s, dozens of water conservancy projects have been built in the Rio Grande valley, among which the larger projects are listed in the index table of water conservancy projects built in the main stream and tributaries of the Rio Grande. In addition, the United States and Mexico have also built levees and flood diversion canals in the lower reaches of the Rio Grande.

Albuquerque plans to invest $654.38+0.5 billion in drinking water projects. This project will divert some surface water from Rio Grande River, which will be treated by advanced water treatment plant and delivered to users.

River segmentation:

Rivers in southern North America. It originated in the Rocky Mountains, first flowed eastward, then southward, and finally flowed southeast along the border between the United States and Mexico into the Gulf of Mexico. It has a total length of 3,030 kilometers and a drainage area of 570,000 square kilometers. In Mexico, its name is bravo river. Navigation is possible downstream, but according to international agreements, shipping is closed.

Most of them flow through arid areas with sparse vegetation. There are many rainstorms in summer, and the river has high sediment concentration, which often causes floods. There are vegetable farms and citrus orchards in the fertile delta. The main cities along the river are Albuquerque, Paso and matamoros.

Baidu Encyclopedia-Rio Grande