Sri Lanka: Disaster Risk Reduction through Climate Change Adaptation in Aranayake

Maha Oya is the third longest river of Sri Lanka which provides water for agriculture, industry, and domestic needs to approximately two million people from Aranayake. Aranayake, a significant part of Maha Oya upper catchment is severely, continuously, and increasingly water stressed. It is a secluded agricultural area are known mainly for tea and spice cultivation, came to the limelight for tragic reasons with the Samasara Landslide of May 2015. The landslide was result of incessant rainfall for six days straight which caused highest number of casualties ever recorded in Sri Lanka for landslide. The growing tendency for climate change related high intensity rains to be blamed for landslides, which are becoming a more frequent occurrence in catchment areas.
Of the 62 Grama Niladhari divisions in Aranayake – an administrative division used at a rural level in Sri Lanka - 60 were classified as disaster prone. Following that, Landslide sites and community groups in the ‘Medium Risk’ category reported intensive water shortages in the upper catchment. It suffered an extreme drought with very low base flows with increased logging and loss of tree cover, soil erosion increases, which increases the risk of landslides. Due to this, turbidity increases as a by-product and water purification for drinking purposes becomes more difficult and expensive, affecting the catchment’s water security.
The Soil Conservation Act of 2009 seems to be in abeyance in Maha Oya upper catchment. Available water in wells, springs and hand pumps was observed to be turbid in Galbokke; forcing poor families to spend ~ 200 LKR per day in dry spells to obtain water from external sources. A lucrative trade in hauling water in trishaws sprung up in Aranayake.

10 schools with 2,214 students and 168 staff members were provided with RWH tanks and trained on how to operate and maintain these structures to raise water security of the region. Al Jalal School was already collecting water off the roof in a barrel when the reconnaissance survey was carried out and the idea of a proper RWH tank was extremely well received. All schools responded well to the activity and maintained it post-completion. At every school students, teachers and parents expressed gratitude for provision of water as they had been faced the trauma of an extremely dry spell.

This activity and the ongoing drought raised awareness of the school community on valuing water as a resource. Due to recognition of the contribution by the Maha Oya AWP, Mr Chandra Ranatunga, Chair of the AWP was appointed as a member of the Cabinet Task Force on Kelani Ganga that reviewed pollution mitigation issues. Post the tree planting activity, it was noted that a large retaining wall was being constructed already, as the authorities had realized the need for further embankment protection.