Please use this identifier to cite or link to this item: https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4203
Title: Drought Assessment and Monitoring in Sri Lanka Using Satellite Images and GIS
Authors: Madushani, M. A.
Issue Date: 26-Jul-2021
Abstract: Drought is one of the significant hazards related to water in the world. In recent years, large-scale intensive droughts have been observed in all continents leading to substantial financial losses, destruction of ecological resources, food shortages, and starvation of millions of people. Sri Lanka usually every year faces drought. Hence, it is essential to monitor drought occurrence. Drought assessment and monitoring in Sri Lanka is currently being done using Standard Precipitation Index (SPI) only. However, this model has issues concerning accuracy. Therefore, this research will be carried out to evaluate whether there is a possibility of drought assessment and monitoring in Sri Lanka using satellite images over a period and GIS. In this dissertation, a new model using Normalized Difference Vegetation Index (NDVI) is proposed to monitor drought in Sri Lanka. The study area is limited to North-Central Provine, and the NDVI values on the study area are generated using Sentinel-2 satellite data. The results are evaluated against the data of Disaster Information Management System(Desinventar). The research shows that the proposed NDVI based approach is able to identify 35.71% drought events correctly. 42.85% drought occurrences are partially identified.
URI: http://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4203
Appears in Collections:2018

Files in This Item:
File Description SizeFormat 
2014CS082.pdf23.64 MBAdobe PDFView/Open


Items in UCSC Digital Library are protected by copyright, with all rights reserved, unless otherwise indicated.