Results 31 to 40 of about 3,051 (183)

Gradient Boosting and Linear Regression for Estimating Coastal Bathymetry Based on Sentinel-2 Images

open access: yesRemote Sensing, 2022
Thousands of vessels travel around the world every day, making the safety, efficiency, and optimization of marine transportation essential. Therefore, the knowledge of bathymetry is crucial for a variety of maritime applications, such as shipping and ...
Fahim Abdul Gafoor   +3 more
doaj   +1 more source

Satellite Derived Bathymetry Using Deep Learning

open access: yes, 2021
International audienceCoastal development and urban planning are facing different issues including natural disasters and extreme storm events. The ability to track and forecast the evolution of the physical characteristics of coastal areas over time is ...
Bergsma, Erwin, W J   +5 more
core   +1 more source

Variational Assimilation of Surface Wave Data for Bathymetry Reconstruction. Part II: Second Order Adjoint Sensitivity Analysis

open access: yesTellus: Series A, Dynamic Meteorology and Oceanography, 2022
Data assimilation methods have been proposed as a technique for reconstructing ocean bathymetry from observations of surface waves. To better understand this technique, we use second order adjoint (SOA) variational analysis to derive the sensitivity of ...
R. A. Khan, N. K.-R. Kevlahan
doaj   +1 more source

Estimation of Bathymetry for Modelling Multi-thread Channel Hydraulics: Application to the Congo River Middle Reach

open access: yes, 2022
Bathymetry is a key input into numerical models that simulate river hydrodynamics, but it is particularly challenging to obtain on multichannel rivers where mid-channel islands prevent survey boats from undertaking bank-to-bank navigation.
Mark A. Trigg   +11 more
core   +1 more source

Neural Network Normal Estimation and Bathymetry Reconstruction From Sidescan Sonar

open access: yesIEEE Journal of Oceanic Engineering, 2023
Sidescan sonar intensity encodes information about the changes of surface normal of the seabed. However, other factors such as seabed geometry as well as its material composition also affect the return intensity. One can model these intensity changes in a forward direction from the surface normals from bathymetric map and physical properties to the ...
Yiping Xie, Nils Bore, John Folkesson
openaire   +2 more sources

UBathy (v2.0): A Software to Obtain the Bathymetry from Video Imagery

open access: yesRemote Sensing, 2022
UBathy is an open source software developed for bathymetry estimation from video images. The proposed scheme is based on extracting the wave modes from videos of the nearshore surface wave propagation.
Gonzalo Simarro, Daniel Calvete
doaj   +1 more source

Satellite Derived Bathymetry Using Machine Learning and Multi-Temporal Satellite Images

open access: yesRemote Sensing, 2019
Shallow water bathymetry is important for nautical navigation to avoid stranding, as well as for the scientific simulation of high tide and high waves in coastal areas.
Tatsuyuki Sagawa   +3 more
doaj   +1 more source

Estimasi Volume Sedimentasi Waduk Sermo Menggunakan Metode RUSLE, Batimetri dan Angkutan Sedimen

open access: yesJournal of Geospatial Information Science and Engineering, 2020
Sermo Reservoir is a reservoir which was built by Indonesian Government and supported by Asian Development Bank in program Integrated Irrigation Sector Project (IISP) in 1996. Sermo Reservoir functions as a flood control, raw water source and irrigation.
Annisa Wulandari, Bambang Kun Cahyono
doaj   +1 more source

Variational assimilation of surface wave data for bathymetry reconstruction. Part I: algorithm and test cases

open access: yesTellus: Series A, Dynamic Meteorology and Oceanography, 2021
Accurate mapping of ocean bathymetry is needed for effective modelling of ocean dynamics, such as tsunami prediction. Available bathymetry data does not always provide the resolution to model such nonlinear waves accurately, and collection of accurate ...
R. A. Khan, N. K.-R. Kevlahan
doaj   +1 more source

Bathymetry Estimation from Satellite Altimeter-Derived Gravity Data

open access: yes, 2023
Bathymetry underpins all marine and ocean research. It is common knowledge that there is a global deficit of high-resolution bathymetry based on modern acoustic techniques. Satellite altimetry enabled modeling of the global seafloor topography and revealed new morphological features in the unmapped areas of the oceans and seas.
Vrdoljak, Ljerka, Bašić, Tomislav
openaire   +2 more sources

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