Results 81 to 90 of about 2,558 (181)

Mapping and Assessing Glacial Lakes in Pakistan: Risk Insights from NDWI

open access: yesFusion Journal of Engineering and Sciences
Water is essential for life, but it also brings serious risks, especially through water-related disasters. Over the past two decades, about 74% of natural disasters have been water-related, affecting millions worldwide. Glaciers are vital sources of freshwater for drinking, farming, industry, and hydropower.
openaire   +1 more source

A machine learning approach for quantifying crop water stress in smallholder farms using unmanned aerial vehicle multispectral imagery

open access: yesAgricultural Water Management
Water stress significantly threatens sugarcane production, particularly among smallholder farmers in South Africa, where spatially explicit assessments remain limited.
Ameera Yacoob   +5 more
doaj   +1 more source

Quantifying Water Bodies with Sentinel-2 Imagery and NDWI: A Remote Sensing Approach

open access: yesE3S Web of Conferences
This paper presents a comparative analysis of surface water dynamics using Sentinel-2 satellite imagery and the Normalized Difference Water Index (NDWI) obtained through the Google Earth Engine (GEE) platform. The study focuses on assessing changes in surface water area and water ratio in the area between the winter and summer seasons of 2017 and 2023.
Avezov Sattarbergan   +7 more
openaire   +2 more sources

Long-Term Phase Changes In The South Aral Sea Region Lakes

open access: yesВодное хозяйство России: проблемы, технологии, управление
A detailed study of the hydrological regime of lakes is an urgent task, however, it should be noted that this issue is complicated by the lack of systematic observations on lakes.
Farida Y. Artykova, Salauat B. Kalabaev
doaj   +1 more source

SAR-NDWI Integration in Ephemeral Water Detection Mapping for Hydrological Analysis in ASALs

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Abstract. Arid and semi-arid lands (ASALs) like Marsabit and Isiolo Counties in Kenya face significant water scarcity, necessitating accurate mapping of surface water resources. Even with mostly dry and arid conditions in these regions, the areas also experience flash floods and downpours that quickly flow through wadis and rivers flowing away from ...
openaire   +1 more source

Sensitivity of the land surface temperature and NDWI index to soil moisture on wheat and barley

open access: yes
Abstract The spatial monitoring of crop water status is crucial for agricultural purposes. The aim of this study was to analyze the sensitivity and response times of land surface temperature (LST) and the Normalized Difference Water Index (NDWI) to changes in soil moisture (VWC) in barley and wheat crops at plot scale in southeastern Argentine ...
Sabrina Beninato   +2 more
openaire   +1 more source

Monitoring of the 2003 summer drought in Belgium with the NDWI applied on spot-vegetation data.

open access: yes, 2005
The summer 2003 was abnormally hot, sunny and dry. The average temperatures from June to August were the highest ever recorded in the Belgian reference meteorological station of Uccle, but also in other countries of western and central Europe such as Portugal, Germany, Switzerland and the United Kingdom.
Horion, Stéphanie   +3 more
openaire   +1 more source

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