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Rainwater harvesting can revolutionises access to clean water in Sri Lanka – LRWHF
If a family with four members switch to rainwater harvesting each family members will have access to about 130 litres of water a day, and the water will be free following the initial investment to establish a rainwater harvesting system,
Tanuja Ariyananda of the Lanka Rain Water Harvesting Forum (LRWHF) said during a recent seminar organised by the Institution of Engineers Sri Lanka (IESL).About 40 percent of Sri Lankans still depend on wells, springs and other natural sources to meet the daily water requirement, she said.Given climate change these individuals may face problems accessing quality water in the future, she said.
“There has been a great interest in this system for the past 30 years. Now around the world there are about 160 million people who benefit from this system. They use this for domestic consumption,” she said.
Ariyananda said rainwater harvesting is important to Sri Lanka because water stress is growing due to human activity, urban development, pollution, etc. Droughts and floods have both become more frequent and both affect access to clean water, she said.
“Sri Lankans in many parts of the country can benefit from rainwater harvesting. This can benefit people in arid and semi-arid areas as well as those living in high elevation. It will also help people who use ground water of poor quality. We must not forget that some researchers link arsenic and fluoride in ground water to CKDu,” she said.
Most Sri Lankans are now crippled with high cost of living and rainwater harvesting saves money by reducing the water bill by up to 60 percent. It can also save the electricity bill by reducing the need to operate water motors, etc., she said.
Ariyananda said 60 percent of the rain that falls in the wet zone of the country is wasted as run off. The number is 40 percent in the dry zone, she said.She added that Sri Lanka has about 50,000 rainwater harvesting systems installed.
Ariyananda said a resident of Colombo with a roofing area of 100 square metres can collect about 192,000 litres of rainwater in a year. The number if 147,200 litres of rainwater for Kandy, 102,400 litres of rainwater in Anuradhapura, 83,900 litres of rainwater in Hambantota, 98,400 litres of rainwater in Jaffna and 300,000 litres of rainwater in Ratnapura, she said.
“If we take the case of Colombo and if we assume there are four people in the family, we can collect about 130 litres of water per person per day. This probably exceeds the daily requirement of a person,” she said.
Ariyananda said there are about 340 schools in Colombo and that the average roof area of a school is 1,000 square metres. The annual rainwater that can be collected by the Colombo schools is 548,800 cubic metres. If we calculate the value of water at 60 rupees a cubic meter, it comes to 32,928,000 rupees,” he said.
She added that some Sri Lankans are concerned about the quality of rainwater. A WHO study in 2017 found that the quality of harvested rainwater is second only to piped water. The quality of harvested rainwater is better than water from bore holes, protected springs and dug wells, according to the WHO research.
Ariyananda said a private higher education institution in Malambe recently started harvesting rainwater from a roof area of 5,525 square meters and that the collected water was adequate to meet 75 percent of the total water demand of the university.
“Imagine the savings this establishment made,” she said.
She said that there is a high initial cost to set up a rainwater harvesting system. The initial cost may be daunting, especially if someone is from a poor community.
“However, the state spends about 1.5 million rupees to give a water connection. But we can build a rainwater harvesting system for Rs 200,000 rupees. Then the household gets free water afterwards. The state can save money by giving rainwater harvesting systems to people,” she said.
News
New Constitution to decide fate of executive presidency, PCs: NPP
By PRIYAN DE SILVA
The government’s position on the abolition of the Executive Presidency and the future of the Provincial Council system will be set out in a new Constitution, NPP General Secretary Dr. Nihal Abeysinghe has said.
Abeysinghe made the remarks when a delegation from the Campaign for Free and Fair Elections (CaFFE) met him at the NPP headquarters in Pelawatte on Friday evening. Former NPP General Secretary and MP Laxman Nipunarachchi also participated in the discussion.
Dr. Abeysinghe said the JVP, the main constituent of the NPP, had consistently advocated the abolition of the Executive Presidency and that it was also a key pledge in the NPP election manifesto.
Responding to calls for the Provincial Council elections to be held under the existing electoral system, Nipunarachchi said the system was being changed to introduce the new electoral system.
He stressed that conducting the elections under the old system was therefore not acceptable.
CaFFE Executive Director Manas Makeen suggested that the Election Commission should be vested with adequate financial authority to ensure that elections are held on time.
Dr. Abeysinghe also requested CaFFE and other stakeholders to submit any proposals for constitutional amendments for consideration.
The NPP made the abolition of Sri Lanka’s executive presidency and the adoption of a new Constitution a central constitutional pledge in its 2024 presidential election manifesto, A Thriving Nation, A Beautiful Life. It promised to draft and enact a new Constitution after public discussion and a referendum, abolish the executive presidency and replace it with a president without executive powers elected by Parliament, while introducing a new parliamentary electoral system.
However, in June 2026, Public Administration Minister Chandana Abayaratne was quoted by the media as having said that although this remained an electoral promise, the Government did not regard it as a priority at that point, saying other constitutional and electoral reforms were being considered first.
The Opposition has accused the goverment of trying to retain the executive presidency by delaying the constitution making project.
News
NBRI issues landslide warning for three districts
By Chaminda Silva
The National Building Research Institute (NBRI) has issued a Level 3 (Red) landslide early warning for several areas in the Kandy, Kegalle and Nuwara Eliya districts amidst continuing heavy rainfall.
The warning, issued at 2 p.m. yesterday (20), will remain in effect until 2 p.m. today (21).
In Kandy District, the red alert covers the Pasbage Korale Divisional Secretariat Division and surrounding areas.
In Kegalle District, red-level warnings have been issued for the Dehiowita, Aranayake, Deraniyagala, Mawanella and Yatiyanthota Divisional Secretariat divisions and surrounding areas.
In Nuwara Eliya District, the warning covers the Kothmale West, Kothmale East, Ambagamuwa and Norwood Divisional Secretariat divisions and surrounding areas.
Meanwhile, a Level 2 (Amber) landslide warning remains in effect for selected areas of Colombo, Galle, Kalutara, Kandy, Kegalle, Matara, Nuwara Eliya and Ratnapura districts.
The affected areas include Padukka; Nagoda, Thawalama and Neluwa; Bulathsinhala, Palindanuwara, Walallawita and Agalawatta; Ganga Ihala Korale; Bulathkohupitiya and Kegalle; Akuressa and Pitabeddara; Thalawakele; and several Divisional Secretariat divisions in Ratnapura District, including Pelmadulla, Ratnapura, Ayagama and Kuruwita.
Residents in the affected areas have been urged to remain vigilant for signs of landslides and follow instructions issued by local authorities, particularly during periods of heavy rainfall.
News
Mahaweli rises as heavy rain triggers flood, landslide fears
By SK Samaranayake
Heavy rainfall across the Central Highlands has triggered flood and landslide warnings, with the Mahaweli Ganga reaching spill level in Nawalapitiya and several roads and low-lying areas already affected.
The Kandy District Disaster Management Unit has urged residents living along the Mahaweli River in Nawalapitiya, Gampola, Gelioya and Peradeniya to remain on high alert as heavy rain continues on the western slopes of the Central Hills.
The Irrigation Department has warned that the Mahaweli Ganga, in the Nawalapitiya area, is nearing spill level. The river level at the Peradeniya Black Bridge, which is under repair, is also continuing to rise.
A senior official said the University of Peradeniya was taking precautionary measures in anticipation of a possible flood situation.
Meanwhile, five spill gates of the Polgolla Mahaweli Reservoir had also been opened yesterday (20) due to the heavy rainfall, Executive Engineer Thisara Bandara said.
Around 21,000 cubic feet of water per second is being released towards the Victoria Reservoir through the five gates.
Bandara warned that all spill gates may have to be opened if rainfall intensifies and urged communities downstream of the Polgolla Dam, on both sides of the river, to remain vigilant.
The threat has already translated into flooding and displacement in several areas.
Nearly 100 families have been displaced in the Pasbage Korale Divisional Secretariat area of Nawalapitiya after the Mahaweli River overflowed and inundated homes in low-lying areas, following heavy rainfall since yesterday (20), a Divisional Secretariat official said.
Kithulkote, Labuwelkotuwa and Jayasundara Ovita were among the areas affected.
The Irrigation Department has separately warned of a risk of major flooding in low-lying areas along the Mahaweli River in the Pasbage Korale area, urging residents and motorists to exercise extreme caution.
Meanwhile, roads have also been hit by the adverse weather.
The Road Development Authority (RDA) has closed the Poojapitiya–Medawela road until further notice after a section of the road at Madadeniya collapsed. The section had reportedly already been weakened during the Ditwah disaster and has now completely given way.
The RDA has closed the road from Poojapitiya town and advised motorists travelling towards Medawela to use alternative routes.
Traffic on the Hatton–Bogawantalawa–Maskeliya–Balangoda main road also came to a complete standstill yesterday after a landslide occurred near the Wanraraja Estate area in Dikoya at around 11 a.m.
Hatton Police officers and residents began clearing the earth from the road, while the local RDA office was informed to assist with the operation.
In another warning, the Disaster Management Centre (DMC) said a potentially dangerous situation had developed at Dabagolla Mountain in Yalagamuwa, Uvaparanagama.
Police said about 700 metres of the mountain had developed cracks measuring between 10 and 12 inches wide. In some locations, the ground had subsided to depths of seven to eight feet.
The DMC said the cracks had widened with the recent rainfall, while water flowing through them had begun loosening the soil and increasing the risk of a landslide.
Police said there were no houses or settlements around the affected mountain, which is located near a forest reserve. Several acres of pepper cultivation are, however, situated in the vicinity.
Meanwhile, heavy rain has also caused flooding in Bogawantalawa.
Several buildings in the low-lying section of Merys Estate National School have been inundated after the Keselgamu Oya, a major tributary feeding the Castlereigh Reservoir, overflowed.
A retaining wall above a house in the lower section of Kotiyagala Estate also collapsed amid the heavy rainfall, causing extensive damage to the house. Bogawantalawa Police said no one inside was injured.
Authorities have urged residents in flood-prone and landslide-prone areas to remain alert as further rainfall could worsen conditions, while motorists have been advised to avoid affected roads and use alternative routes where possible.
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