Comparison of Transect-from-baseline and The Change Polygon Methods in the survey of the coastline Changes (case study: Chalus Delta) base

Document Type : علمی -پژوهشی

Abstract

Direct and indirect effects of hydrodynamic processes of land and sea, Cause great changes in the coastline geometry. The study of these changes can be very useful for planning sustainable coastal environments. The aim of this study, was to compare Transect-from-baseline and the Change Polygon methods in the survey of the coastline Changes in Chalus Delta base. Materials used to achieve the objectives of this research, are TM and ETM images of Landsat Satellite in 1988 and 2000 years and SPOT image in 2015. The work is based on measuring of changes rate in the coastline between the two time periods by using both Transect-from-baseline and The Change Polygon methods. This study shows that in Transect-from-baseline method, how to select the baseline, high rotation coastline in some coastal areas and indentations or protrusions large areas of coastline will have a huge impact on results. but in polygon changes, due to measuring changes occurring between the two shorelines, results obtained are based on the parameters measured the position of the coastline. so the Change Polygon method is show more scientific credibility than the Transect-from-baseline method

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References

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