Asem River
River in Java, Indonesia
From Wikipedia, the free encyclopedia
Asem River (Ci Asem) is a river in northern West Java province on Java island, Indonesia.[2] The river rises on Mount Tangkuban Perahu and discharges into the Bay of Ciasem, Java Sea, traversing Ciasem, Subang Regency, around 90 km east of the capital Jakarta.[3]
| Ci Asem River Ci Asem, Sungai Ciasem, Ciasem, Tjiasem, Tji Asem | |
|---|---|
Ciasem mouth | |
 | |
| Location | |
| Country |  Indonesia |
| Province | West Java |
| Physical characteristics | |
| Source | Mount Tangkuban Perahu |
| • location | Cicadas, Subang regency |
| • coordinates | 6.748750°S 107.611500°E |
| Mouth | Ciasem bay, (Java Sea) |
• location | Blanakan, Subang Regency |
• coordinates | 6.224475°S 107.695886°E |
| Basin size | 745 km2 (288 sq mi)[1] |
| Basin features | |
| River system | Ciasem basin |
| Bridges | Pantura Ciasem bridge |
| Basin management unit | BPDAS Citarum Ciliwung[1] |
 map shows the river source (green pin) near Lembang flowing northward and emptying into Ciasem Bay (blue pin) in the Java Sea. | |
Hydrology
Asem River is one of the three main rivers in the Subang Regency.[4] There are a total of 21 rivers and 61 tributaries in the watershed area of (Daerah Aliran Sungai/DAS) Ciasem of 745 km2. Compared to the other two main rivers - Ci Punegara and Ci Lamaya - Asem River and its many tributaries all flow only within the Subang Regency. The river has a total length of 60 kilometer until the northern coast.[4]
Geography
The river flows in the northwest area of Java with a predominantly tropical monsoon climate (designated as Am in the Köppen-Geiger climate classification).[5] The annual average temperature in the area is 25 °C. The warmest month is September when the average temperature is around 28 °C, and the coldest is July, at 24 °C.[6] The average annual rainfall is 2810 mm. The wettest month is January, with an average of 454 mm of rainfall, and the driest is September, with 14 mm of rainfall.[7]