Landslide hazard zonation of Nilambur taluk using remote sensing
| dc.contributor.advisor | Vishnu, B | |
| dc.contributor.author | Asla, K | |
| dc.contributor.author | KAU | |
| dc.date.accessioned | 2020-01-21T07:47:01Z | |
| dc.date.available | 2020-01-21T07:47:01Z | |
| dc.date.issued | 2016 | |
| dc.description | PG | en_US |
| dc.description.abstract | Present study aims at the preparation of a landslide hazard zonation map for Nilambur Thaluk of Malappuram district, Kerala and to suggest mitigation measures for controlling landslides. Landslide Hazard zonation is achieved using spatial multi criteria evaluation (SMCE) module of ILWIS 3.31 RS-GIS software. SMCE is based on the Analytical Hierarchical Process (AHP) developed by Saaty (1980). Different parameters contributing to landslides were identified. Thematic maps of various parameters like slope, aspect, soil, geology, landuse, rainfall and elevation were prepared. These thematic layers were standardised and overlaid with appropriate weights to generate landslide hazard zones of Nilambur Taluk. The study area was divided into three zones namely low, medium and high hazard zones. Landslide Hazard Zonation (LHZ) map of the Nilambur Thaluk was prepared using the SMCE module of ILWIS software. According to the LHZ map, 12.4 km2 (0.94%) is located in the low hazard zone, 1080.8 km2 (81.68) % in the medium hazard zone and 230 km2 (17.38%) in high hazard zone. Study found that most of the areas fall under medium hazard zone followed by high hazard zone. Analysis of the LHZ map, revealed that the Western regions of the study area including Akampadam, Kalikavu and Karuvarakundu and areas along the Kozhikode - Nilambur - Gudallur Highway are highly unstable. The probability of occurrence of debris flow in this region is high. These regions have steeply sloping topography and with heavy rainfall during the monsoon season it can cause heavy landmass movement. Some of the tourist spots are concentrated around Akampadam and Karuvarakundu regions like Adyanpara waterfalls and Keralakund waterfalls. Mampad rubber estate, Ariyani rubber estate and areas along Kanjirappuza fall under high hazard zone. Some of the reserved forest area is also coming under high hazard zone. Landslide mitigation measures like slope stabilization, drainage, control of plantations, afforestation, stabilization of roads and avoiding constructional activity in high hazard area have been suggested. The LHZ map was validated by overlaying with previous landslide points. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810141440 | |
| dc.keywords | Landslide, Remote sensing, Landslide hazard zonation, GIS, Analytical hierarchial process, Flows | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 85 | en_US |
| dc.publisher | Academy of Climate Change Education and Research Vellanikkara | en_US |
| dc.sub | Climate Change Adaptation | en_US |
| dc.subject | null | en_US |
| dc.theme | Landslide hazard zonation | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Landslide hazard zonation of Nilambur taluk using remote sensing | en_US |
| dc.type | Thesis | en_US |