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 nameAesesa
Location
CountryIndonesia
StateEast Nusa Tenggara
Physical characteristics
SourceInielika
 • locationFlores
 • elevation1,400 m (4,600 ft)
MouthFlores Sea
 • coordinates
8°29′S 121°18′E
Length87 km (54 mi)
Basin size1,230 km2 (470 sq mi)
Discharge 
 • average7.5 m3/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
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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]

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

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.
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