Time Series Analysis of Glacial Lake in Western Himalayas Based on NDWI and MNDWI
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 3
Abstract
This Water always appears diversely, which makes its extraction not so simple. In this paper, we propose a new, simple, fast and accurate methodology based on a combination of the two indices NDWI and MNDWI for calculating lake area and analyzing the change using Landsat data. The water indices are designed to highlight inland water bodies in remotely sensed imagery. The water information by NDWI always mixed with built-up land noise and thus the area of a water body was overestimated. MNDWI could significantly highlight the water information, as it can easily distinguish shadow and water body and solve the problem to eliminate shadow in extracting water information. The application of these indices for water body mapping is mainly based on the thresholding method to separate water from non water areas especially in the context of determining the lake area.. A subpixel approach is then applied to the eliminate the problems of mixes pixels to enhance the results.
Authors and Affiliations
Neeraj Kaushal, Kamal Kumar
Keywords
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