Sissa River

Sissa River (Aesesa River) is a river of Flores, East Nusa Tenggara, Indonesia.[1][2] The 87-km river flows from southwest to northeast direction, with the upstream at Mount Inielika north of Bajawa, Ngada Regency and discharge into Flores Sea near Mbay, Nagekeo Regency.

Sissa River Ai Sissa, Ai Sisa, Waesesa, Wae Woki River
Location of the river Sissa River (Lesser Sunda Islands) Sissa River (Indonesia)
Native name	Aesesa
Location
Country	Indonesia
State	East Nusa Tenggara
Physical characteristics
Source	Inielika
• location	Flores
• elevation	1,400 m (4,600 ft)
Mouth	Flores Sea
• coordinates	8°29′S 121°18′E
Length	87 km (54 mi)
Basin size	1,230 km^2 (470 sq mi)
Discharge
• average	7.5 m^3/s (260 cu ft/s)

Hydrology

The watershed (Indonesian: Daerah Aliran Sungai/DAS) Aesesa has an area of 1,230 km² with round form, comprising two regencies: Ngada Regency and Nagekeo Regency. The upstream at Ngada Regency near Bajawa is called "Wae Woki river". The major tributaries are:

• Ae Mau river
• Lowo Ulu river
• Lowo Langge river
• Lowo Lele river
• Lowo Me Bhada river
• Wae Bia river
• Wae Bhara river

Aesesa river has a length of 87 km[3] with an average discharge of around 7.5 m³/second[4]

Uses

The inhabitants along the Aesesa River use the water for agriculture, with the help of "Sutami Dam" at Nggolo Mbay, District of Aesesa, Nagekeo Regency which distributes the water to farmlands around 6,452 hectare in Nagekeo Regency at an average discharge of 14.69 m³/second.[5] At the upstream, there is several waterfalls, like "Ogi waterfall" and "Soso waterfall". Ogi waterfall has a height of more than 30-meter and is utilized as a major tourist attraction of Bajawa.[6]

Geography

Aesesa
Climate chart (explanation)
J F M A M J J A S O N D     569     27 21     257     26 22     255     26 22     117     26 22     127     27 21     98     26 21     86     25 19     24     25 19     23     27 20     30     29 21     173     28 21     365     27 21 Average max. and min. temperatures in °C Precipitation totals in mm Source: [7]
Imperial conversion J F M A M J J A S O N D     22     81 70     10     79 72     10     79 72     4.6     79 72     5     81 70     3.9     79 70     3.4     77 66     0.9     77 66     0.9     81 68     1.2     84 70     6.8     82 70     14     81 70 Average max. and min. temperatures in °F Precipitation totals in inches

The river flows in the middle to the north of Flores with predominantly tropical savanna climate (designated as Aw in the Köppen-Geiger climate classification).[8] The annual average temperature in the area is 26 °C. The warmest month is November, when the average temperature is around 30 °C, and the coldest is February, at 23 °C.[7] The average annual rainfall is 1686 mm. The wettest month is January, with an average of 302 mm rainfall, and the driest is September, with 8 mm rainfall.[9]

See also

• List of rivers of Indonesia
• List of rivers of Lesser Sunda Islands

References

1. Rand McNally, The New International Atlas, 1993.
2. Ai Sissa at Geonames.org (cc-by); Last updated 17 January 2012; Database dump downloaded 27 November 2015
3. Rough measurement of major river length DAS Waesesa and Sub-DAS Wae Woki.
4. (in Indonesian)Tingkat Kerentanan SDA DAS Easesa
5. Potensi Pengembangan Daerah Irigasi Mbay
6. Air Terjun Ogi Bejawa
7. "NASA Earth Observations Data Set Index". NASA. 30 January 2016.
8. Peel, M C; Finlayson, B L; McMahon, T A (2007). "Updated world map of the Köppen-Geiger climate classification". Hydrology and Earth System Sciences. 11 (5): 1633–1644. doi:10.5194/hess-11-1633-2007.
9. "NASA Earth Observations: Rainfall (1 month – TRMM)". NASA/Tropical Rainfall Monitoring Mission. 30 January 2016.