The Amazon is the greatest river in the world by so many measures; the volume of water it carries to the sea (approximately 20% of all the freshwater discharge into the oceans), the area of land that drains into it, and its length and width. It is one of the longest rivers in the world and, depending upon who you talk to, is anywhere between 6,259km/3,903mi and 6,712km/4,195mi long.
Gilgit River (Urdu: دریائے گلگت) is a tributary of the Indus River, and flows past the town of Gilgit. It is located in the Northern Areas of Gilgit–Baltistan, Pakistan. The Gilgit river starts from Shandur lake. The Gilgit River is also referred to as the Ghizar River.
The Colorado River is one of the principal rivers of the Southwestern United States and northern Mexico (the other being the Rio Grande). The 1,450-mile (2,330 km) Colorado River drains an expansive, arid watershed that encompasses parts of seven U.S. and two Mexican states. Rising in the central Rocky Mountains in the U.S., the river flows generally southwest across the Colorado Plateau and through the Grand Canyon before reaching Lake Mead on the Arizona–Nevada border, where it turns south toward the international border. After entering Mexico, the Colorado approaches the large Colorado River Delta at the tip of the Gulf of California between Baja California and Sonora.
Kurram River (Pashto: د کرمې سيند) is located in Paktia and Khost provinces of Afghanistan and Kurram Agency, North Waziristan Agency and Khyber Pakhtunkhwa, Pakistan. It drains the southern flanks of the Spin Ghar mountain range and is a right bank tributary of the Indus River. Kurram River is also mentioned in the Rig Veda under the name of Krumu.
The Indus River, also called the Sindhū River (Sindhi: سنڌو دريا), or Abāsīn (Pashto: اباسين) in Khyber Pakhtunkhwa, is one of the longest rivers in Asia. It flows through Pakistan, the Indian state of Jammu and Kashmir and western Tibet. Originating in the Tibetan Plateau in the vicinity of Lake Mansarovar, the river runs a course through the Ladakh region of Jammu and Kashmir, towards Gilgit-Baltistan and then flows in a southerly direction along the entire length of Punjab, Pakistan to merge into the Arabian Sea near the port city of Karachi in Sindh. The total length of the river is 3,180 km (1,980 mi). It is Pakistan’s longest river.