Identification, evaluation and change detection of highly sensitive wetlands in South-Eastern Sri Lanka using ALOS (AVNIR2, PALSAR) and Landsat ETM+ data

7th IGRSM International Remote Sensing & GIS Conference and Exhibition

地球科学;计算机科学

Gunawardena, Ajith^1 ; Fernando, Tamasha^1 ; Takeuchi, Wataru^2 ; Wickramasinghe, Chathura H.^3 ; Samarakoon, Lal^3

Geo-informatics Unit, Central Environmental Authority, Sri Lanka^1

Institute of Industrial Science, University of Tokyo, Japan^2

Geoinformatics Center, Asian Institute of Technology, Thailand^3

关键词: Change detection;    Data and information;    Field observations;    Gis and remote sensing;    Industrial development;    Questionnaire surveys;    Satellite data;    Wetland ecosystem;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/20/1/012050/pdf
DOI  :  10.1088/1755-1315/20/1/012050

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Sri Lanka is an island consists of numerous wetlands and many of these ecosystems have been indiscriminately exploited for a commercial, agricultural, residential and industrial development and waste dumping. Eastern River Basin Region in Sri Lanka is rapidly urbanizing, which leads more threats to the surrounding wetland ecosystems considerably. Therefore, it is important to identify and designated them as reserved areas where necessary in order to protect them under the National Environmental Act of Sri Lanka. Mapping and change detection of wetlands in the selected region is a key requirement to fulfill the above task. GIS and Remote Sensing techniques were used to identify and analyze the wetland eco systems. In this study Landsat ETM+, ALOS-AVNIR2, ALOS-PALSAR images were analyzed for identifying and change detection of wetlands. The secondary information and data were collected through a questionnaire survey to recognize the possible threats and benefits. The collected data and information were incorporated in identification, analyzing and ranking the wetlands. The final outcome of the project is to correlate the satellite data with the field observations to quantify the highly sensitive wetlands to declare as Environmental Protection Areas under the National Environment Act of Sri Lanka.