Hamun Lake

Hāmūn-e Helmand
A child plays on the bank of the Chah Nimeh reservoir, to the southeast of the lake, 2018
Hāmūn-e Helmand
Location	southeast Iran, southwest Afghanistan
Coordinates	30°50′N 61°40′E / 30.833°N 61.667°E / 30.833; 61.667
Primary inflows	Helmand River
Basin countries	Afghanistan / Iran
Surface area	5,700 square kilometres (2,200 sq mi)[1] Iran: 3,800 square kilometres (1,500 sq mi)[1] Afghanistan: 1,900 square kilometres (730 sq mi)[1]
Ramsar Wetland
Official name	Hamun-e-Saberi & Hamun-e-Helmand
Designated	23 June 1975
Reference no.	42[2]

Lake Hāmūn (Persian: دریاچه هامون, Daryāche-ye Hāmūn; Pashto: هامون ډنډ), or the Hamoun Oasis, is a seasonal lake and wetlands in the endorheic Sīstān Basin in the Sistan region on the Afghanistan–Iran border. In Iran, it is also known as Hāmūn-e Helmand, Hāmūn-e Hīrmand, or Daryāche-ye Sīstān ("Lake Sīstān").^[3]

Hāmūn is a generic term which refers to shallow lakes (or lagoons), usually seasonal, that occur in the deserts of southeast Iran and adjacent areas of Afghanistan and Pakistan as a product of snowmelt in nearby mountains in spring. The term Hāmūn Lake (or Lake Hāmūn) equally applies to Hāmūn-e Helmand^[3] (entirely in Iran), as well to the shallow lakes Hāmūn-e Sabari and Hāmūn-e Puzak, which extend into the territory of present-day Afghanistan with the latter almost entirely inside Afghanistan.

The Hamun is fed by numerous seasonal water tributaries; the main tributary is the perennial Helmand River, which originates in the Hindu Kush mountains in Afghanistan. In modern times, and prior to the existence of the dams for agricultural irrigation, spring floods would bring into existence much larger lakes.^[4]