The Dori, also called Lora and Kadanai is a river of Afghanistan

Afghanistan

Afghanistan , officially the Islamic Republic of Afghanistan, is a landlocked country located in the centre of Asia, forming South Asia, Central Asia and the Middle East. With a population of about 29 million, it has an area of , making it the 42nd most populous and 41st largest nation in the world...

 and Pakistan

Pakistan

Pakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...

. It is a tributary of the Arghandab River

Arghandab River

Arghandab is a river in Afghanistan, about in length. It rises in the Hazarajat country north-west of Ghazni, and flows south-west falls into the Helmand below Girishk. In its lower course it is much used for irrigation, and the valley is cultivated and populous; yet the water is said to be...

 and sub tributary of the Helmand River

Helmand River

The Helmand River is the longest river in Afghanistan and the primarily watershed for the endorheic Sistan Basin....

 and runs for 320 kilometres through Kandahar Province

Kandahar Province

Kandahar or Qandahar is one of the largest of the thirty-four provinces of Afghanistan. It is located in southern Afghanistan, between Helmand, Oruzgan and Zabul provinces. Its capital is the city of Kandahar, which is located on the Arghandab River. The province has a population of nearly...

 in Afghanistan and Balochistan

Balochistan (Pakistan)

Balochistan is one of the four provinces or federating units of Pakistan. With an area of 134,051 mi2 or , it is the largest province of Pakistan, constituting approximately 44% of the total land mass of Pakistan. According to the 1998 population census, Balochistan had a population of...

 in Pakistan.

The Dori begins north of the city of Quetta

Quetta

is the largest city and the provincial capital of the Balochistan Province of Pakistan. Known as the "Fruit Garden of Pakistan" due to the diversity of its plant and animal wildlife, Quetta is home to the Hazarganji Chiltan National Park, which contains some of the rarest species of wildlife in the...

. It is called Lora in its headwaters in Pakistan. The name changes to Kadanai upon its entry into Afghanistan, and the name Dori is given below the town of Spin Baldak.

In Afghanistan, Dori first runs westward and soon faces the sandy desert of Rigestan. It then takes a northerly direction and along the desert passes east and northeast past Takht-e Pol, bordering southeast of the Kandahar Valley. Shortly after, it receives the Arghastan River and then the Tarnak River

Tarnak River

The Tarnak River is a river of Ghazni, Zabul and Kandahar provinces of Afghanistan. It rises in Hazarajat, near , south of the Lomar Pass. It flows towards the south-west for some 350 km before it joins the Dori River some 30 km downstream of the Dori-Arghastan confluence, and some...

, both on the left bank, some thirty kilometers south of the city of Kandahar

Kandahar

Kandahar is the second largest city in Afghanistan, with a population of about 512,200 as of 2011. It is the capital of Kandahar Province, located in the south of the country at about 1,005 m above sea level...

.

Hydrology

The Dori receives most of its flow from melting snow in spring, especially in March.

Irrigation greatly reduces its speed. At Takht-e Pol it amounts to more or less than 1 m per second.