Results 91 to 100 of about 2,139 (188)

تخمین نرخ جابه‌جایی رودخانه‌‌ها بر اساس پایش تغییرات پیچان‌رودها با استفاده از تصاویر ماهواره‌‌ای سنتینل2 [PDF]

هیدروژئومورفولوژی
پایش تغییرات مورفولوژیکی رودخانه‌های پیچان‌رود، به‌ویژه در مناطق صعب‌العبور یا فاقد داده‌های میدانی، همواره با چالش‌های اجرایی روبرو بوده است. اگرچه فناوری سنجش از دور برای حل چالش‌های پیش رو راه‌حلی امیدبخش ارائه می‌دهد، اما بیشتر مطالعات پیشین بر ...
مریم مفتاح هلقی, عبدالرضا ظهیری, امیراحمد دهقانی, خلیل قربانی   +3 more
doaj   +1 more source

Mapping and Change Detection of Water Bodies in the Godavari Delta using Geospatial Technology [PDF]

, 2022
Geospatial technology has been used to map the water bodies of the Godavari Delta in 2005, 2009, 2014, and 2019. The Normalized Water Difference Index (NDWI) and the Modified Normalized Water Difference Index (MNDWI) have been used to map water bodies in
Rao, Yellamelli Ramji Satyaji, P, Manikandan   +1 more
core   +1 more source

Optimization of Coastline Extraction Using MNDWI Thresholds and Machine Learning on Landsat Images of Wetlands in Northern East Java, Indonesia

JGEET: Journal of Geoscience, Engineering, Environment and Technology
This study evaluates and compares methods for extracting coastlines in the wetland coastal areas of northern East Java, specifically in Sidoarjo and Gresik Regencies, East Java, Indonesia.
Shofura Afanin Nuha, Nurul Khakhim, Pramaditya Wicaksono   +2 more
doaj   +1 more source

بررسی تطبیقی روش‌های استخراج سطح آب خلیج گرگان و پایش تغییرات آن با استفاده از داده‌های ماهواره ای چند زمانه [PDF]

هیدروژئومورفولوژی
خلیج گرگان، یکی از مهم‌ترین تالاب‌های شمالی ایران است که تغییرات سطح آب آن پیامدهای زیست‌محیطی متعددی برای مناطق اطراف دارد. مطالعه حاضر به بررسی تطبیقی تغییرات سطح آب خلیج گرگان با استفاده از شاخص های طیفی آب می پردازد.
حمید عمونیا, محمد رضا یوسفی روشن, محمد دیمه ور   +2 more
doaj   +1 more source

Spatio-temporal evolution of surface water resources in the Brazilian semi-arid: a case study in the Sertão of Pernambuco [PDF]

RBRH
The research analyzed the evolution of surface water in Serra Talhada, Brazil, over 31 years using remote sensing data from Google Earth Engine (GEE).
Geovane de Andrade Silva, Érick Mateus de Souza Freire, Francisco Gustavo da Silva, José Raliuson Inácio Silva, Antônio Henrique Cardoso do Nascimento, Elisiane Alba, Araci Farias Silva, Alan Cézar Bezerra   +7 more
doaj   +1 more source

An analysis of flooding coverage using remote sensing within the context of risk assessment [PDF]

, 2019
Results of research of the identification of flooding as a result of groundwater table fluctuations on the example of the valley of the River Vistula, with the use of multi-spectral Sentinel-2 images from the years 2017–2018 are presented. An analysis of
Solovey, Tatiana
core   +2 more sources

An integrated study on change detection and environment evaluation of surface water

Applied Water Science, 2019
Surface water pollution is one of the serious environment pollution problems, posing threat to human and other creatures. Extraction, change detection and environment evaluation of surface water are prerequisite for water resource management. Undoubtedly,
Qiaozhen Guo, Xiaoxu Wu, Xiao Sang, Ying Fu, Yuchen Zang, Xuemei Gong   +5 more
doaj   +1 more source

Changes in the Lake Area of Tonle Sap: Possible Linkage to Runoff Alterations in the Lancang River?

Remote Sensing, 2018
Tonle Sap Lake is the largest freshwater lake in Southeast Asia. Water development infrastructures are increasingly being constructed in the Lancang–Mekong River Basin, which is a major concern considering its potential impact on Tonle Sap Lake ...
Xuan Ji, Yungang Li, Xian Luo, Daming He
doaj   +1 more source

Mapping waterholes and testing for aridity using a remote sensing water index in a southern African semi-arid wildlife area

, 2017
Waterholes are a key resource that influences wildlife distribution in semi-arid ecosystems. Mapping waterholes can guide intervening decisions for supplementing water resources and managing wildlife distribution patterns.
Amon Murwira, Zorodzai Dzinotizei, Laure Guerrini, Fadzai M. Zengeya   +3 more
core   +1 more source

Hybrid Deep Learning–Monte Carlo-Based MNDWI Ensemble for Probabilistic Water Extent Mapping Under Dynamic Spectral Flow Conditions in Large Waterbodies

Reliable surface water extent (SWE) delineation remains challenging in river–reservoir monitoring systems characterized by complex hydrologic variability and spectral uncertainty in land/water transition zones, leading to significant classification ...
Innkyo Choo, Younghun Jung, Yeonguk Yu, Kola Yusuff Kareem   +3 more
core   +1 more source