We present a comprehensive critical review of well-established satellite remote sensing water indices and offer novel, robust Augmented Normalized Difference Water Index (ANDWI). ANDWI employs an expanded set spectral bands, RGB, NIR, SWIR1-2, to maximize the contrast between non-water pixels. Further, we implement dynamic thresholding method, Otsu algorithm, enhance ANDWI's performance. Applie...

Recently, the Tibetan Plateau (TP) has experienced dramatic climate change, which influence atmospheric and hydrological cycles. The understanding of surface water dynamics is essential to further investigate balance hydrologic cycle in this region. In study, we used all available Landsat Surface Reflectance imagery that generated Modified Normalized Difference Water Index (MNDWI) overlapped TP...

El crecimiento urbano manifestado en las últimas décadas el Área Metropolitana del Gran Resistencia (AMGR), condujo a la ocupación de espacios no aptos para asenta miento poblacional dada sus condiciones ambientales, y por ello, alteración los receptores agua pluvial, al estar comprometidos con nuevas urbaniza ciones, han cambiado su dinámica consecuencia se ha producido un número inunda...

This research aims to develop a tsunami vulnerability assessment model on land use and cover using information NDVI, NDWI, MDWI, MSAVI, NDBI extracted from sentinel 2 A ASTER satellite images. The optimization algorithms LASSO linear regression. validation test is MSE, ME, RMSE MAE which show that the regression has higher accuracy than LASSO. NDWI interpolation values are 0.00 - (-0.35) MNDWI ...

This article presents a study on the spatiotemporal dynamics of land cover and use, vegetation indices, water content in semiarid region Pernambuco, Brazil. is based an analysis satellite images from years 2016, 2018, 2019 using MapBiomas platform. The results show changes predominant classes over time, with increase caatinga area decrease pasture area. An indices (NDVI LAI) indicated low bioma...

Sand spits are elongated sand deposits on the beach that often form at inlet or headland’s tip. The hydrodynamics of river flow, waves, storm surge, and tide affect spit formation, which was created by longshore transport along coast. Bogowonto Opak inlets located in southern coastal Java facing directly to Indian ocean where micro-tidal, flow affecting both inlets, chosen for this case study. ...

The Tibetan Plateau, the world’s largest orogenic plateau, hosts thousands of lakes that play prominent roles as water resources, environmental archives, and sources of natural hazards such as glacier lake outburst floods. Previous studies have reported that the size of lakes on the Tibetan Plateau has changed rapidly in recent years, possibly because of atmospheric warming. Tracking these chan...

Water resources are crucial for human activities and sustainable socioeconomic development. Understanding surface water information can play a key role in resource management, which affects the global cycle ecological environments. Considering Hailar River body as an example, this study proposes new threshold self-learning extraction method (TSLWEM) based on modified normalized difference index...

Abstract There are many traditional methods available for water body extraction based on remote sensing images, such as normalised difference index (NDWI), modified NDWI (MNDWI), and the multi-band spectrum method, but accuracy of these is limited. In recent years, machine learning algorithms have developed rapidly been applied widely. Using Landsat-8 models decision tree, logistic regression, ...