The Ayung River is the longest river on the

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Gui ...

n island of

Bali Bali () is a province of Indonesia and the westernmost of the Lesser Sunda Islands. East of Java and west of Lombok, the province includes the island of Bali and a few smaller neighbouring islands, notably Nusa Penida, Nusa Lembongan, and ...

. It runs 68.5 km from the northern mountain ranges, passing the Bangli, Badung, Gianyar regencies and the city of Denpasar, before discharging into the

Badung Strait Badung Strait is a strait on the south east side of Bali in Indonesia. It lies between the islands of Bali and Nusa Penida. It is about 60 km long and 20 km wide. History In February 1942, the battle of Badung Strait was fought here ...

at Sanur.Tukad Ayung
at Geonames.org (cc-by); Last updated 2012-01-17; Database dump downloaded 2015-11-27 The river is famous for white water rafting.Sungai Ayung tempat Rafting di Bali
- Bali Tours Club. Accessed August 2017.

Hydrology

The

drainage basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...

of the Ayung River covers an area of 109.30 km², with the tributaries may reach 300.84 km² (about 30,000 ha). The river flows 68.5 km from its source near Kintamani, along the southern slope of the mountains separating northern and southern area of Bali, finally to the Padanggalak Beach, Sanur. At upriver, three big tributaries supply the water to the Ayung River, namely Tukad Bangkung with the upstream at Pelaga, Tukad Menggani with the upstream at Catur, and Tukad Siap with the upstream at Kintamani. The confluence of these three tributaries is located at Payangan. The erosion rate is relatively low in the rice field area at upstream and in the middle, due to flatter slopes and good land conservation techniques. Rice terrace Kadewatan 200507-2

Geography

The Ayung River watershed area has an annual average temperature between 18.4 °C and 26.6 °C, depending on the altitude. The average annual rainfall at the upstream is high, around 1963–3242 mm. Going downstream at an average inclination of 13.13%, the rainfall and the rainy days on the river decrease. In the middle area, the average rainfall is around 1998–3176 mm with 105 -128 average rainy days. At the downstream, near the city of Denpasar, the rainfall becomes low, around 1486 mm with 69 average rainy days. Tim Penyusun. Rencana Pengelolaan Secara Terpadu Daerah Aliran Sungai Ayung. Bappeda Provinsi Bali. 2002.Kali Bersih (Sungai Ayung)
- Desa Peguyangan Kangin - May 2015. The drainage basin has two types of topography: mountainous and flat. The water debit measured in 1973-1986 is around 6.6-14.2 m³/second with an average of 8.69 m³/second. The sedimentation level at Buangga shows the highest at 544.4 ton/day and the lowest at 2.8 ton/day, with the calculated total (SCS-USDA method) of 91,393.127 ton/year.

Land use

The main use of river drainage basin of the Ayung is for agriculture. Scenic views mainly are observed at upriver, especially from Petang to Carangsari, with little human influence. Many challenging rapids make this river a good location for rafting.

References

External links

Fivelements Retreat Bali Embraces Authentic Balinese Healing
At the bank of Ayung River. Wellness Tourism Association -October 17, 2022 {{Rivers of Bali Rivers of Bali Rivers of Indonesia