In what country is the 12th longest river in?

Question

In what country is the 12th longest river in?

Answer 1

12th. THE LENA,  ASIA (4 .400 km)

Answer 2

According to the reference, it's the Mackenzie River in Canada.

Answer 3

This depends upon which source you access and how they calculate the length of the river. "t depends on the identification of the source, the identification of the mouth, and the precise measurement of the river length between source and mouth. As a result, the length measurements of many rivers are only approximations. In particular, there has for long been disagreement whether the Amazon or the Nile is the world's longest river. The world's longest rivers often run through several countries too.

The source of a river may be hard to determine because a river typically has many tributaries. Among the many sources, the one that is farthest away from the mouth is considered as the source of the river, thus giving a maximal river length. In practice, the tributary with the farthest source is not always the one given the name of the river."

In what country is the 12th longest river in may be the Mackenzie River in Canada which is 2,637 miles long according to Wikipedia or the Niger River in Africa which is 2,539 miles long and runs mostly through Nigeria.

Answer 4

I don't know what to believe.  Wikipedia.org in one section says the Mekong River in China is the 11th longest, but if you click on the entry, it goes to another page that says it is the 12th longest.

However, this web site says the Yenisey River (2543) in Russia is the 12th longest with Niger (2590) as 11th, Mekong (2600) as 10th, and Mackenzie (2635) as 9th.

http://www.socialstudiesforkids.com/arti...

Answer 5

As you can see, the answer may be imprecise. From Wikipedia is this information:

"When the length of a river is followed by an asterisk , it is an average of multiple information sources. If the difference in lengths between given information sources is significant, all lengths are listed. Likewise, if the lengths from secondary information sources are similar, they are averaged and that figure has an asterisk.

Most scientists have considered the Nile to be the longest river on Earth, and some believe a fair statement is that the Nile is the longest in the world and the Amazon is the strongest. The big differences in the recorded length of the Amazon depends on whether or not it is valid to take a course south of the Ilha de Marajó at the Amazon's mouth. New evidence, (dated Saturday 16 June 2007) obtained from a high-altitude scientific venture in the Andes, claims that "the Amazon is longer than the Nile by 100km, with its longest headwater being the Carhuasanta stream originating in the south of Peru on the Nevado Mismi mountain's northern slopes and flowing into the Río Apurímac, and not from a place in the north of Peru as was thought before: this adds about 284 km = 176 miles to the length of the Amazon."[5]; but this is likely a confused re-description of what was known before, as atlas maps made long before this show Amazon headwaters in this position."



But the Mackenzie answer may be more precise.

River   Length (km)   Length (miles)   Drainage area (km²)   Average discharge (m³/s)  

1. Nile 6,650 4,135 3,349,000 5,100  

2. Amazon 6,400  3,980  6,915,000 219,000

3. Yangtze  6,300  3,917 1,800,000 31,900

4. Mississippi - Missouri 6,275 3,902  2,980,000 16,200  

5. Yenisei-Angara-Selenga 5,539  3,445  2,580,000 19,600

6. Yellow (Huang He) 5,464  3,398  745,000 2,110  

7. Ob - Irtysh 5,410 3,364 2,990,000 12,800

8. Congo-Chambeshi 4,700 2,92 3,680,000 41,800  

9. Amur - Argun 4,444 2,763 1,855,000 11,400

10. Lena 4,400  2,736  2,490,000 17,100

11. Mekong 4,350 2,705 810,000 16,000

12. MackenziePeaceFinlay 4,241 2,637 1,790,000 10,300

13. Niger 4,200 2,611 2,090,000 9,570

14. Paraná 3,998 2,486 3,100,000 25,700

Answer 6

The Mekong River is the 12th longest river in the world at a length of 4,800 kms. More than 60 million people depend on the river for food, water, and transportation. The yearly periods of floods and dry conditions are important for the production of rice and vegetables.

Answer 7

It is in China...

The Mekong is one of the world’s major rivers. It is the 12th-longest river in the world, and 7th longest in Asia. (discharging 475 km³/114 cu mi of water annually). Its estimated length is 4,350 km (2,703 mi), and it drains an area of 795,000 km² (307,000 sq mi).[1] From the Tibetan Plateau it runs through China's Yunnan province, Burma, Thailand, Laos, Cambodia and Vietnam. All except China and Burma belong to the Mekong River Commission. A South Asian regional association, Mekong-Ganga Cooperation is named after this river. The extreme seasonal variations in flow and the presence of rapids and waterfalls have made navigation extremely difficult.

Answer 8

1. Nile (4160 miles)

2. Amazon (4080 miles)

3. Mississippi-Missouri (3740 miles)

4. Yantze (3720 miles)

5. Yenisey (3650 miles)

6. Amur (3590 miles)

7. Ob-Irtysh (3360 miles)

8. Plata-Parana (3030 miles)

9. Hwang Ho (3010 miles)

10. Congo (2880 miles)

11. Lena (2730 miles)

12. Mackenzie-Slave-Peace-Finley (2630 miles)