The effects of climate change and climate variability give rise to frequent disasters globally, and the frequency of occurrence which has been observed as ever increasing. The situation in Sri Lanka is no exception, with landslides and flood incidents, becoming too frequent. Heavy and localized rains which fell in Sri Lanka during recent times caused an unprecedented disaster situation.
Landslide means any type of movement of ground mass including land subsidence created due to natural causes or human activities. In the global context, landslides are triggered by earthquakes, volcanos, snow-melting and heavy rainfall. Almost all the time in Sri Lanka, landslides are triggered by rainfall. At times of heavy rainfall, water infiltrates through the top soil on the ground into the deep soil layers beneath, thus filling in empty pores in the soil. When the water in pores reaches close to sat...වැඩිදුර
NBRO conducted several workshops to train skilled masons in Bandarawela, Welimada and Haputhale Divisional Secretariat Divisions in Badulla district on Disaster Resilient Housing Construction. Consecutive workshops were held on 8th, 9th and 10th March 2016 at respective Divisional Secretariat Divisions. Main objectives of these workshops were to train masons on disaster resilient construction technology and make them aware of landslide hazard. Each of the workshops was attended by about 70 participants. Ultratech Cement Lanka Pvt. Ltd. collaborated with NBRO in this programme by giving a technical lecture and awarding toolkits (having trowel, plumb, measuring tape, spirit level and gloves) to participants.
NBRO recently flew a drone over the Balangoda landslide which is a large scale landslide occurred in Niyadagala, Pabahinna in Rathnapura District (476985.99 m E, 744040.48 m N) on 3rd May 2016 between 16.15 -17.00 Hrs. The landslide flowed through the "Pannil Oya" valley destroying the Niyadigala Arannasenasana Temple.
The following figure (figure 1) shows the landslide location and surrounding features of the area. The stream flows to Samanala wewa (tank).
Figure 1: Location and surrounding features
Landslide: The landslide is approximate length of the landslide is about 1.5 km. The length of the main scarp is about 50 m & the height of the main scarp is about 29 m. Further, a 3D model was developed by using the aerial photographs, obtained from the drone. The figure 2 shows the debris flow path, surrounding settlements, and main features of the la...වැඩිදුර