Results 21 to 30 of about 2,558 (181)

Monitoring Water Spread and Aquatic Vegetation using Spectral Indices in Nalsarovar, Gujarat State-India

open access: yesInternational Journal of Environment and Geoinformatics, 2021
Nalsarovar Bird Sanctuary, a natural freshwater lake (a relict sea) that is the largest natural wetland in the Thar Desert Bio-geographic Province and represents a dynamic environment with salinity and depth varying depending on rainfall. For maintaining
Kirtan R. Chauhan   +3 more
doaj   +1 more source

Spatial and Temporal analysis of Landsat data to Retrieve the NDWI, NDVI and Land Surface Temperature by thermal remote sensor: A case study of Hyderabad Metropolitan City, Telangana [PDF]

open access: yesE3S Web of Conferences
Urban areas endure larger variations in ground surface temperature, vegetation, and water content than rural areas do due to the accelerated rise of technology, urbanization, and industrialization.
Suneetha Yedla, Anji Reddy Mareddy
doaj   +1 more source

Assessment of Climate Indices and NDWI Analysis in Lerma Chapala Basin

open access: yes, 2021
Lake Chapala is a natural ecosystem of Mexico, declared Ramsar site, currently, is an area with importance in the agricultural sector, tourism, and important source of drinking water in the Metropolitan area of Guadalajara, considered as a thermo regulatory body.
Miriam Castro-Lazcarro   +2 more
openaire   +2 more sources

Drying conditions in Switzerland – indication from a 35-year Landsat time-series analysis of vegetation water content estimates to support SDGs

open access: yesBig Earth Data, 2021
Exacerbated by climate change, Europe has experienced series of hot and dry summer since the beginning of the 21st century. The importance of land conditions became an international concern with a dedicated sustainable development goal (SDG), the SDG 15.
Charlotte Poussin   +8 more
doaj   +1 more source

A GIS based approach for assessing water body change in a mountain wetland: Case of Dayet Awwa, Morocco [PDF]

open access: yesE3S Web of Conferences
According to the definition derived from the International Convention on Wetlands (Ramsar), wetlands are areas that cover a wide range of habitat types, including floodplains, marshes, streams, estuaries and offshore coastal areas. These natural habitats
Abdenour Assia   +3 more
doaj   +1 more source

Klasifikasi Wilayah Rawan Banjir di Tomohon Menggunakan Citra Satelit Landsat 8 OLI

open access: yesJurnal Nasional Teknik Elektro dan Teknologi Informasi, 2023
Bencana alam sering terjadi tanpa diduga sehingga menyebabkan kerugian materiel maupun nonmateriel. Banjir merupakan salah satu bencana alam yang sering terjadi di beberapa daerah di Indonesia, salah satunya adalah Kota Tomohon.
Gabriel Kenisa Meqfaden Baali   +2 more
doaj   +1 more source

Análisis de la vegetación a partir de índices espectrales y su relevancia en la identificación de espejos de agua en el humedal Torca Guaymaral, Bogotá, Colombia

open access: yesAvances, 2023
En Colombia son varios los humedales han experimentado cambios significativos en el espejo de agua, ya sea por procesos naturales o antrópicos; la mayoría de estos presentan eutrofización, hecho que se comprueba por la proliferación descontrolada de ...
Cindy Lorena Sabogal Vélez   +2 more
doaj   +1 more source

A NEW MULTI-SPECTRAL THRESHOLD NORMALIZED DIFFERENCE WATER INDEX (MST-NDWI) WATER EXTRACTION METHOD – A CASE STUDY IN YANHE WATERSHED [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Accurate remote sensing water extraction is one of the primary tasks of watershed ecological environment study. Since the Yanhe water system has typical characteristics of a small water volume and narrow river channel, which leads to the difficulty for ...
Y. Zhou   +6 more
doaj   +1 more source

Specific features of NDVI, NDWI and MNDWI as reflected in land cover categories

open access: yesLandscape & Environment, 2016
The remote sensing techniques provide a great possibility to analyze the environmental processes inlocal or global scale. Landsat images with their 30 m resolution are suitable among others for landcover mapping and change monitoring. In this study three spectral indices (NDVI, NDWI, MNDWI) wereinvestigated from the aspect of land cover types: water ...
SZILÁRD SZABÓ   +2 more
openaire   +2 more sources

Recurrence Analysis of Vegetation Indices for Highlighting the Ecosystem Response to Drought Events: An Application to the Amazon Forest

open access: yesRemote Sensing, 2020
Forests are important in sequestering CO2 and therefore play a significant role in climate change. However, the CO2 cycle is conditioned by drought events that alter the rate of photosynthesis, which is the principal physiological action of plants in ...
Teodoro Semeraro   +5 more
doaj   +1 more source

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