Kelani Ganga

The Kelani River ( si, කැළණි ගඟ) is a river in Sri Lanka. Ranking as the fourth-longest river in the country, it stretches from the Sri Pada Mountain Range to Colombo. It flows through or borders the Sri Lankan districts of Nuwara Eliya, Ratnapura, Kegalle, Gampaha and Colombo. The Kelani River also flows through the capital of Sri Lanka, Colombo, and provides 80% of its drinking water.

Hydrology

The Kelani River has two main tributaries in its upper reaches: the Kehelgamu Oya and the Maskeli Oya. These two contribute to hydro-electric production in Sri Lanka, housing several major reservoirs, ponds and power stations. Castlereigh Reservoir and Norton Reservoir are constructed across the Kehelgamu Oya, while Maskeliya Reservoir, Canyon Reservoir and Laxapana Reservoir are constructed across the Maskeli Oya. In its lower reaches, some more tributaries connect to the Kelani River, out of which the most famous are the We Oya at Yatiyanthota, the Gurugoda Oya at Ruwanwella, and the Seethawaka Ganga at Avissawella.

Hydrometry and usage

The Kelani supplies approximately 80% of the water used in Colombo. In addition, the river is used for transport, fisheries, sewage disposal, sand mining and for production of hydroelectricity. Through these factors, many people depend on the river for their daily routine in life. Depending on the operation of three reservoirs, the river flow varies from to in the dry seasons, and to during the monsoons. The annual sand extraction from the river is approximately to . From a barge, people dive to the river bed, from where the sand is lifted to the barge in a bucket, and when the barge is full, it is taken to the river bank and unloaded by a separate team. The sand mining causes the river bed to sink by approximately per year. At present, two main concerns in connection with the river are flooding during the monsoon and saline intrusion in the dry season.

In addition, Kelani River water levels affect the flood risk to Colombo, the capital of Sri Lanka, to a considerable extent. One reason is that part of the city and suburbs of Colombo lies on the lower flood plain of the river. Exposure of Colombo and the upper catchments of Kelani River to the South West Monsoon is another reason.

The problems are related: the saline intrusion is enhanced by the deepening of the river caused by sand mining. Regulation, in order to prevent saline intrusion, can reduce the water quality in other ways, and can increase the flood risk. Sand mining is economically important nationally and to the many people involved.

The Kelani stream flow was investigated just upstream of Ambatale at Hanwella, with engineers analyzing the river discharges from 1973 to 2004 (in million m³/month).

Colors=
id:lightgrey value:gray(0.8)
id:darkgrey value:gray(0.3)
id:sfondo value:rgb(1,1,1)
id:barra value:rgb(0.6,0.8,0.9)

ImageSize = width:600 height:220
PlotArea = left:40 bottom:40 top:20 right:20
DateFormat = x.y
Period = from:0 till:400
TimeAxis = orientation:vertical
AlignBars = justify
ScaleMajor = gridcolor:lightgrey increment:100 start:0
ScaleMinor = gridcolor:lightgrey increment:50 start:0
BackgroundColors = canvas:sfondo

BarData=
bar:Jan text:January
bar:Fév text:February
bar:Mar text:Marz
bar:Avr text:April
bar:Mai text:May
bar:Jun text:June
bar:Jul text:July
bar:Aoû text:August
bar:Sep text:Sept.
bar:Oct text:Oct.
bar:Nov text:Nov.
bar:Déc text:Dec.
PlotData=
color:barra width:30 align:left

bar:Jan from:0 till: 94
bar:Fév from:0 till: 68
bar:Mar from:0 till: 98
bar:Avr from:0 till: 162
bar:Mai from:0 till: 286
bar:Jun from:0 till: 373
bar:Jul from:0 till: 275
bar:Aoû from:0 till: 211
bar:Sep from:0 till: 233
bar:Oct from:0 till: 345
bar:Nov from:0 till: 297
bar:Déc from:0 till: 156

PlotData=
bar:Jan at: 94 fontsize:S text: 94 shift:(-10,5)
bar:Fév at: 68 fontsize:S text: 68 shift:(-10,5)
bar:Mar at: 98 fontsize:S text: 98 shift:(-10,5)
bar:Avr at: 162 fontsize:S text: 162 shift:(-10,5)
bar:Mai at: 286 fontsize:S text: 286 shift:(-10,5)
bar:Jun at: 373 fontsize:S text: 373 shift:(-10,5)
bar:Jul at: 275 fontsize:S text: 275 shift:(-10,5)
bar:Aoû at: 211 fontsize:S text: 211 shift:(-10,5)
bar:Sep at: 233 fontsize:S text: 233 shift:(-10,5)
bar:Oct at: 345 fontsize:S text: 345 shift:(-10,5)
bar:Nov at: 297 fontsize:S text: 297 shift:(-10,5)
bar:Déc at: 156 fontsize:S text: 156 shift:(-10,5)

Cultural references

Kelani River is connected closely with the Sinhala Buddhist culture of Sri Lanka, especially with the people living on the area identified as the Kelani Valley. This derives primarily from the fact that the Kelani River is associated with two of the most venerated Buddhist shrines and pilgrimages, i.e. Sri Pada Mountain and Kelani Raja Maha Viharaya. There are a number of folk poems that mention the Kelani River, such as the following:

Folk Poems

මලේ මලේ ඔය නා මල නෙළා වරෙන්

අත්ත බිඳෙයි පය බුරුලෙන් තබා වරෙන්

කැලණි ගඟේ ඔරු යනවා බලා වරෙන්

සාදුකාර දී ඔරුවක නැගී වරෙන්


මහවැලි කැලණි කලු වලවේ යන ගංගා

සමනොළ කන්ද මුදුනේ සිට පැන නැංගා

බෑවුම් තැනිතලා හෙල් අතරින් රිංගා

මේවා ගලයි මිණි කැට දිය යට හංගා

''Hansa Sandeshaya''

සමනොළ මුදුන සිරිපද ඔබන

මගුලට
නිකසල මහ සඟන ගෙන වඩින

මුනිඳුට
පැහැදුල සුනිල් මිණියෙන් කළ මග ලෙසට

මනදොළ පිරෙයි ගඟ සිරිසර දුටු තොපට

The Kalyani Ordination Hall in Bago, Myanmar derives its name from the Kelani River.

Special features

The Academy Award-winning ''The Bridge on the River Kwai'' was filmed on the Kelani River near Kitulgala, although nothing remains now except the concrete foundations for the bridge (and, supposedly, the submerged train cars that plunged into the river in the climactic scene).Sri Lanka für Fortgeschrittene
/ref>

Bridges over Kelani River

The following table shows the major bridges over the Kelani River:

See also

* Geography of Sri Lanka
* List of rivers in Sri Lanka
* Kelani River-Peliyagoda Waterdrome
* Biyagama Water Treatment Plant

References

{{Inland waters of Sri Lanka
Bodies of water of Colombo District
Bodies of water of Gampaha District
Geography of Colombo
Rivers of Sri Lanka