What is the average depth of the longest river in the world? 5

The longest river described in geography books is the Nile.

The Nile River runs through the northeastern part of the African continent, flows through Burundi, Rwanda, Tanzania, Uganda, Ethiopia, Sudan, Egypt, crosses the Sahara Desert, the world's largest area, and finally empties into the Mediterranean. The basin covers an area of about 3.35 million square kilometers, accounting for one-ninth of the African continent, with a total length of 6,650 kilometers and an average annual flow of 3,100 cubic meters per second, making it the longest river in the world.

The length of the Amazon River is recognized as 6,400 kilometers in the world, and the Amazon River basin covers an area of more than 7 million square kilometers, and the amount of water discharged into the Atlantic Ocean every year is 3,800 cubic kilometers, making it the world's widest river basin and the largest flow.

The Nile River is characterized by regular flooding, usually starting in May in northern Sudan, reaching its highest level in August, and then gradually declining, with low levels from January to May. Although flooding occurs regularly, the amount of water and the timing of high tides vary greatly. The reason for this phenomenon is the Blue Nile and Atbara rivers, which are fed by seasonal rainstorms on the Ethiopian plateau.

More than 80% of the Nile's water is supplied by the Ethiopian plateau, with the rest coming from the East African highland lakes. When the flood comes, it will inundate the farmland on both banks, and when the flood water recedes, it will leave a thick layer of river mud to form fertile soil. Four or five thousand years ago, the Egyptians knew how to grasp the laws of the flood and use the fertile land on both sides.

For a long time, the Nile valley has been a place of cotton fields and fragrant rice flowers. Sandwiched between the Sahara Desert and the Arabian Desert, the meandering Nile River is like a green walkway, full of infinite life.

A little science every day: the longest river - the Nile.

The deepest lake in the world isLake Baikal, the depth is 1,741 (one thousand seven hundred and forty-one) meters

The longest river in the world is:The length of the Nile is 6,671 (6,671) km

The country with the largest land area in the world is:Russia, with an area of 17,075,870 (1,775,870) square kilometers.

The highest mountain in the world is:Mount Everest, its height is 8, 8,848.8) meters

The largest ocean in the world is:The Pacific Ocean covers an area of 179,968,000 (179,968,000) square kilometers

The largest continent in the world is:Asia, with an area of 4,400 (4,400) square kilometers

Counting unit. Like one, ten, hundred, thousand, thousand, ten thousand, ...... thousandetc., which are called counting units of numbers. These counting units are arranged in a certain order, and the position they occupy is called digits.

The commonly used decimal notation, the so-called "decimal system" is the relationship between two adjacent counting units: one large unit is equal to ten small units, that is to say, the rate of advancement between them is "ten".

The counting unit should contain two large blocks, the integer part and the decimal part, and be arranged in the following order: ......100 billion, 10 billion, billion, 100 million, 100 million, 100,000, 100,000, 100,000, 10,000,000,000,000,000,000,000,000,000,000,000,00

One percent.

1. One in 1,000 、......The integer part does not have the largest counting unit, and the decimal part does not have the smallest counting unit.

When writing numbers, if there is a decimal part, use the decimal point ( ) to separate the whole number from the decimal number.

The Amazon River in South America The Amazon River is the largest river in the world in terms of water volume and the most extensive basin area, the annual runoff of the river is equivalent to 1 15 of the annual runoff of all rivers in the world, it has more than 1,000 tributaries, the longest tributary is 1,600 kilometers long, and many tributaries come together, its volume is equivalent to 12 times that of the Mississippi River, and its basin contains parts of 9 countries. The Amazon is also the widest river in the world. Even 1,600 kilometers from the mouth of the river is 12 kilometers wide.

In the rainy season, it can reach a width of more than 40 kilometers. At the mouth of the river, which is 320 kilometers wide, the Amazon's enormous currents carry sediment and "stretch like a sea to the horizon and gradually merge with the blue Atlantic Ocean." The vast Yellow Current covers an area of the continental shelf that exceeds the area of several European countries".

The ship travels 3,680 kilometres to the Peruvian port of Iquitos. Due to its large volume and low pollution, the Amazon River can be said to be the most environmentally untouched river in the world so far. According to the 21st Century World Water Commission's survey report; "There are currently only two large rivers in the world that can be classified as healthy rivers.

These two rivers are the Amazon in South America and the Congo in Africa. Because the Amazon has the largest flow and the most extensive basin, there are few settlements and factories along its banks. There are also no large-scale industrial centers in the area around the Congo River. ”

Nile River (length: 6,670 km).

The Nile is a river that flows through eastern and northern Africa, flowing from south to north into the Mediterranean Sea. Along with the Congo River in Central Africa and the Niger River in West Africa, it is one of the three largest river systems in Africa.

At 6,670 km long, the Nile is the longest river in the world. In 2007, some scholars from Brazil claimed that the Amazon River was longer, but it has not yet been universally accepted by the global geography community. The Nile has two main tributaries, the White Nile and the Blue Nile.

The Blue Nile, which originates in the Ethiopian highlands, is the most water and nutrient source of the lower Nile, but the White Nile is the longest of the two tributaries. The Nile crocodile lives here.

Nile climate

The Nile River Basin spans 35° latitude, and the climate in the north and south is very different, showing obvious latitudinal zonality, and non-zonal factors (mainly topography) also affect the distribution of climate zones to a certain extent.

The Ethiopian Plateau, located in the southeast of the basin, has a vertical spectrum of climate due to the uplift of the terrain, and has the characteristics of distinct dry and wet seasons. In summer, the air over North Africa and the Arabian Peninsula is a low-pressure zone, and the southeast trade winds blowing from the southern Indian Ocean cross the equator and turn to southwesterly winds, merging with the hot and humid airflow from the Gulf of Guinea to form a strong southwesterly airflow, which rises along the windward slope of the plateau, forming a "heavy rain period" in July and September. In winter, dry northeasterly winds from the Southwest Asian continent prevail on the plateau, creating a dry season from October to February.

3 April, Sudan was located at the centre of low pressure and attracted a moist air stream from the Indian Ocean, creating a "light rain period" before the "heavy rain period" over most parts of the plateau. With an average annual rainfall of 1,000,2000 mm, the plateau is the most important rainfall centre in the Nile Basin.

The southern part of the basin, the northwestern part of the East African plateau, is not only affected by the humid air flow from the Gulf of Guinea, but also because it is located in the equatorial lake area, the solar radiation is strong and the convection is strong, so the rainfall is abundant, with an average annual rainfall of 1200 1300 mm, and the seasonal distribution is also relatively uniform: the average monthly rainfall does not exceed 180 200 mm at most, and the minimum is not less than 50 60 mm, there is no obvious dry season, and the relative humidity is about 70%, which is another rainfall center in the Nile basin.

From Nemoulay to the north, the rainy season is shortened, the rainfall decreases, and the isorain line is basically zonal. The rainy season occurs in southern Sudan from April to October, while in the central and northern parts of Sudan it is limited to July to August. Annual rainfall in Khartoum is less than 200 mm, while the annual rainfall between Dongura and Cairo is less than 25 mm, and south of Assiut is often rainless all year round.

Due to the influence of the Mediterranean climate, the annual rainfall gradually increases from 25 mm to 200 mm from Cairo to the coast, with most of the rainfall occurring in winter.

The longest river in the world is the Nile.