Deli River (Indonesian: Sungai Deli) is a river located in
Sumatra
Sumatra () is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the list of islands by area, sixth-largest island in the world at 482,286.55 km2 (182,812 mi. ...
, Indonesia, and courses through
Medan
Medan ( , ) is the capital city, capital and largest city of the Indonesian Provinces of Indonesia, province of North Sumatra. The nearby Strait of Malacca, Port of Belawan, and Kualanamu International Airport make Medan a regional hub and multi ...
before discharging to the
Strait of Malacca
The Strait of Malacca is a narrow stretch of water, long and from wide, between the Malay Peninsula to the northeast and the Indonesian island of Sumatra to the southwest, connecting the Andaman Sea (Indian Ocean) and the South China Sea (Pa ...
near the port city of
Belawan
The Port of Belawan ( zh, t=勿老灣, s=, poj=mài lau ôan) is a harbor in Medan, North Sumatra. Located on the northeast coast of Sumatra, Belawan is Indonesia's busiest seaport outside of Java. It includes Medan Belawan District, the most nor ...
. It is one of the eight rivers in Medan. The
Deli Sultanate
The Sultanate of Deli ( Indonesian: ''Kesultanan Deli Darul Maimoon''; Jawi: ) was a 1,820 km2 Malay state in east Sumatra founded in 1632 when a commander of the Aceh Sultanate, Gocah Pahlawan, conquered the area during the reign of Is ...
was
founded on the delta of the river around 1640,
and later around the 19th century, this river acted as an artery of trade for the sultanate to other areas.
Hydrology
The forest area in the headwaters of the Deli is 3,655 hectares, or 7.59 percent of 48 162 hectares of Deli watershed. With an area of 48 162 hectares, length of 73 kilometers (km), and a width of 5.58 m, Deli watershed should have at least 140 hectares, or 30 percent of the watershed.
Today, the river is heavily polluted. 70 percent of waste in the Deli River are solid or liquid waste, due to waste generated in the densely populated city of Medan (reaching 1,725 tons a day
).
Geography
The river flows in the northeastern area of
Sumatra
Sumatra () is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the list of islands by area, sixth-largest island in the world at 482,286.55 km2 (182,812 mi. ...
with predominantly
tropical rainforest climate
A tropical rainforest climate or equatorial climate is a tropical climate sub-type usually found within 10 to 15 degrees latitude of the equator. There are some other areas at higher latitudes, such as the coast of southeast Florida, United States ...
(designated as ''Af'' in the Köppen-Geiger climate classification).
The annual average temperature in the area is 24 °C. The warmest month is January, when the average temperature is around 26 °C, and the coldest is December, at 22 °C.
The average annual rainfall is 2862 mm. The wettest month is October, with an average of 446 mm rainfall, and the driest is June, with 129 mm rainfall.
See also
*
List of drainage basins of Indonesia
This is a list of river catchment areas, also known as drainage basins, in Indonesia.
Based on the National River Basin Classification map, Indonesia has a total of 42,210 river basins organized as a basis for determining watershed management poli ...
*
List of rivers of Sumatra
This is a list of rivers flowing in the island of Sumatra, Indonesia.''Map of Indonesia''. Peta Indonesia. Wawasan Nusantara. CV. Indo Prima Sarana. Accessed 29 Juli 2017.
In alphabetical order
Mouth location North coast
Northeast coast
...
Notes
:1.Population calculated from the sum of populations in the 14 subdistricts of Medan municipality which were used for population calculation in the citation.
References
{{Rivers of Sumatra
Rivers of North Sumatra
Deli basin