亚马孙河位于热带雨林,人烟稀少,无航运价值,且稀有物种多,所以亚马孙河航运价值低。
亚马孙河流域内大部分地区为热带雨林气候,上游属于高原山地气候,年雨量2000毫米以上。亚马逊河沉积下的肥沃淤泥滋养了650万平方公里的地区。
亚马孙河在有些地方河宽达6-10公里,有的地方,河水分为两股,中间形成复杂的自然河网,形成许多大小岛屿,比河面高出不到5米,在最窄的地方,如离河口600公里的奥比多斯,河流只有1.6公里宽,但有600米深,这时河水流速达到每小时6-8公里。亚马孙河被誉为“河流之王”,源于南美洲安第斯山中段,秘鲁的科罗普纳山东侧的米斯米雪峰之颠。其正源——乌卡利亚河,不断地接纳雪峰上的淙淙冰水,一路汇集百川之水,进入著名的亚马孙平原。
亚马孙河流经秘鲁、厄瓜多尔、哥伦比亚、委内瑞拉、圭亚那、苏里南、玻利维亚和巴西等国。最终在巴西的马腊若岛附近流入大西洋。
亚马孙河全长6400多公里,其支流有上千条,与干流共同组成了总长度达6万余公里的亚马孙河水系,其流域面积705万平方公里,大部分在巴西境内。
The Amazon River is located in the tropical rainforest, sparsely populated, has no shipping value, and has many rare species, so the Amazon River has low shipping value.
Most areas in the Amazon River basin have a tropical rainforest climate, and the upper reaches have a plateau mountain climate with an annual rainfall of more than 2,000 mm. The fertile silt deposited by the Amazon River nourishes an area of 6.5 million square kilometers.
In some places, the Amazon River is 6-10 kilometers wide. In some places, the river water is divided into two streams, forming a complex natural river network in the middle, forming many large and small islands, which are less than 5 meters higher than the river surface. In the narrowest place, such as Obidos, 600 kilometers away from the estuary, the river is only 1.6 kilometers wide, but 600 meters deep, and the river flow rate reaches 6-8 kilometers per hour. The Amazon River is known as the "King of Rivers". It originates from the top of the Mismi Snow Peak on the east side of Mount Coropuna in Peru, in the middle section of the Andes Mountains in South America. Its main source, the Ucariya River, constantly receives the gurgling icy water from the snowy peaks, and gathers the water of hundreds of rivers along the way to enter the famous Amazon Plain.
The Amazon River flows through Peru, Ecuador, Colombia, Venezuela, Guyana, Suriname, Bolivia and Brazil. It finally flows into the Atlantic Ocean near Marajó Island in Brazil.
The Amazon River is more than 6,400 kilometers long, and it has thousands of tributaries, which together with the main stream form the Amazon River system with a total length of more than 60,000 kilometers. Its basin area is 7.05 million square kilometers, most of which is in Brazil.
The climate environment in the Amazon River Basin and most of the rivers in Russia (mainly in the Asian part) is extremely harsh. One is hot and humid, and the other is bitterly cold. As a result, these two places are rarely visited. The Amazon River Basin and Siberia are also the most sparsely populated areas in the world. The population is small, the cost is high, and the economic benefits are not good, so the shipping value is not high.
The shipping value of the Volga River is greater than that of the Amazon River. The reason is that the Volga River flows through the East European Plain, with a large amount of water and little seasonal variation in water volume. In addition, the population density there is large and the economy is developed, so the shipping value is high.
Although the area where the Amazon River flows is a plain, the river water volume is also large, and the shipping conditions are good, the Amazon Plain is a primitive tropical rainforest with a sparse population, so the shipping value is very small.