Answer the following question: Information: - Panj is a city in southern Tajikistan which is situated on the Afghan border, some south of the capital Dushanbe. It is located along the banks of the Panj River, from which it derives its name. - Pakistan (or ), officially the Islamic Republic of Pakistan, is a federal parliamentary republic in South Asia on crossroads of Central Asia and Western Asia. It is the sixth-most populous country with a population exceeding 200 million people. It is the 36th largest country in the world in terms of area with an area covering . Pakistan has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by India to the east, Afghanistan to the west, Iran to the southwest and China in the far northeast respectively. It is separated from Tajikistan by Afghanistan's narrow Wakhan Corridor in the north, and also shares a maritime border with Oman. - The Indus River, also called Darya-e-Sindh or Sindh River or Absn, is a major south-flowing river in South Asia. The total length of the river is which makes it one of the longest rivers in Asia. Originating in the western part of Tibet in the vicinity of Mount Kailash and Lake Manasarovar, the river runs a course through Ladakh, Gilgit-Baltistan, and Khyber Pakhtunkhwa, and then flows along the entire length of Punjab to merge into the Arabian Sea near the city of Thatta in Sindh. It is the longest river of Pakistan. - Iran (, also , ; ' ), also known as Persia, officially the Islamic Republic of Iran (' ), is a sovereign state in Western Asia. It is bordered to the northwest by Armenia, the "de facto" Nagorno-Karabakh Republic, and Azerbaijan; to the north by the Caspian Sea; to the northeast by Turkmenistan; to the east by Afghanistan and Pakistan; to the south by the Persian Gulf and the Gulf of Oman; and to the west by Turkey and Iraq. Comprising a land area of , it is the second-largest country in the Middle East and the 18th-largest in the world. With 82.8 million inhabitants, Iran is the world's 17th-most-populous country. It is the only country with both a Caspian Sea and an Indian Ocean coastline. The country's central location in Eurasia and Western Asia, and its proximity to the Strait of Hormuz, make it of great geostrategic importance. Tehran is the country's capital and largest city, as well as its leading economic center. - A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as stream, creek, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek, but not always: the language is vague. - South Asia or Southern Asia is a term used to represent the southern region of the Asian continent, which comprises the sub-Himalayan SAARC countries and, for some authorities, adjoining countries to the west and east. Topographically, it is dominated by the Indian Plate, which rises above sea level as Nepal and northern parts of India situated south of the Himalayas and the Hindu Kush. South Asia is bounded on the south by the Indian Ocean and on land (clockwise, from west) by West Asia, Central Asia, East Asia, and Southeast Asia. - The Kokcha River Persian : is located in northeastern Afghanistan . A tributary of the Panj river it flows through Badakhshan Province in the Hindu Kush The city of Feyzabad lies along the Kokcha . Near the village of Artin Jelow there is a bridge over the river . The Kokcha River valley is known for its lapis lazuli mining in Badakshan province . Found in limestone these deposits in the mines of Sar - e - Sang were being worked as early as the 3rd millennium BC and the Kokcha River valley is considered one of the world 's leading areas of mining this reserve . The valley was the source of lapis for the ancient Egyptian and Mesopotamian civilizations , as well as the later Greek and Roman . During the height of the Indus valley civilization about 2000 B.C. , the Harappan colony now known as Shortugai was established near the lapis mines . More recently , during the 1980s conflict with the USSR , Afghanistan resistance fighters disassembled unexploded Soviet landmines and ordnance and used the scavenged explosive to help mine lapis along the Kokcha to further fund their resistance efforts . - The Hindu Kush (Pashto, Persian and ), also known in Ancient Greek as the Caucasus Indicus or Paropamisadae, is an mountain range that stretches near the Afghan-Pakistan border, from central Afghanistan to northern Pakistan. It forms the western section of the "Hindu Kush Himalayan Region" ("HKH"). It divides the valley of the Amu Darya (the ancient "Oxus") to the north from the Indus River valley to the south. - The Panj River, also known as "Pyandzh River" or "Pyanj River" (derived from its Russian name "/Pjandz"), is a tributary of the Amu Darya. The river is 1,125km long and forms a considerable part of the Afghanistan - Tajikistan border. - Afghanistan (Pashto/Dari: , "Afnistn"), officially the Islamic Republic of Afghanistan, is a landlocked country located within South Asia and Central Asia. It has a population of approximately 32 million, making it the 42nd most populous country in the world. It is bordered by Pakistan in the south and east; Iran in the west; Turkmenistan, Uzbekistan, and Tajikistan in the north; and China in the far northeast. Its territory covers , making it the 41st largest country in the world. - Turkmenistan (or ); formerly known as Turkmenia is a country in Central Asia, bordered by Kazakhstan to the northwest, Uzbekistan to the north and east, Afghanistan to the southeast, Iran to the south and southwest, and the Caspian Sea to the west. - Pashto (; "Paxt" ), also known in older literature as Afghn or Pahn, is the South-Central Asian language of the Pashtuns. Its speakers are called Pashtuns or Pukhtuns and sometimes Afghans or Pathans. It is an Eastern Iranian language, belonging to the Indo-European family. Pashto is one of the two official languages of Afghanistan, and it is the second-largest regional language of Pakistan, mainly spoken in the west and northwest of the country. Pakistan's Federally Administered Tribal Areas (FATA) are almost 100% Pashto-speaking, while it is the majority language of the province of Khyber Pakhtunkhwa and the northern districts of Balochistan. Pashto is the main language among the Pashtun diaspora around the world. The total number of Pashto-speakers is estimated to be 4560 million people worldwide. - Central Asia or Middle Asia is the core region of the Asian continent and stretches from the Caspian Sea in the west to China in the east and from Afghanistan in the south to Russia in the north. It is also colloquially referred to as "the 'stans" (as the six countries generally considered to be within the region all have names ending with the Persian suffix "-stan", meaning "land of") and is within the scope of the wider Eurasian continent. - The Amu Darya ('; /; //; '), also called the Amu River and historically known by its Latin name, , is a major river in Central Asia. It is formed by the junction of the Vakhsh and Panj rivers, at Qal'eh-ye Panjeh in Afghanistan, and flows from there north-westwards into the southern remnants of the Aral Sea. In ancient times, the river was regarded as the boundary between Greater Iran and Turan. - A tributary or affluent is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean. What is the relationship between 'kokcha river' and 'amu darya'?
Answer:
mouth of the watercourse