Results 31 to 40 of about 1,580,763 (277)

cBathy: A robust algorithm for estimating nearshore bathymetry [PDF]

Journal of Geophysical Research: Oceans, 2013
A three‐part algorithm is described and tested to provide robust bathymetry maps based solely on long time series observations of surface wave motions. The first phase consists of frequency‐dependent characterization of the wave field in which dominant frequencies are estimated by Fourier transform while corresponding wave numbers are derived from ...
Rob Holman, Nathaniel Plant, Todd Holland   +2 more
openaire   +1 more source

Bathymetry mapping and sea floor classification using multispectral satellite data and standardized physics-based data processing [PDF]

, 2011
Multispectral satellite data (WordView-2, IKONOS, QuickBird) are used to map bathymetry and spectral sea floor classes in a range of coastal areas.
Ohlendorf, S., Sergio Cerdeira-Estrada, Cerdeira-Estrada, S., Halina T. Kobryn, Müller, A., Heege, T., Andreas Müller, Sabine Ohlendorf, Thomas Heege, Kobryn, H.T.   +9 more
core   +1 more source

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

Tellus: 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

DETERMINATION OF THE BEST METHODOLOGY FOR BATHYMETRY MAPPING USING SPOT 6 IMAGERY: A STUDY OF 12 EMPIRICAL ALGORITHMS [PDF]

, 2017
For the past four decades, many researchers have published a novel empirical methodology for bathymetry extraction using remote sensing data. However, a comparative analysis of each method has not yet been done.
Hartuti, Maryani, Kresnawati, Diah Kirana, Masita Dwi Mandini Manessa, Diah Kirana Kresnawati, Haidar, Muhammad, Maryani Hartuti, Muhammad Haidar, Manessa, Masita Dwi Mandini   +7 more
core   +1 more source

Bathymetry data and water column profiles in the shallow waters of Langhovde in Lützow-Holm Bay, East Antarctica

, 2021
The sediments of shallow marine waters and lakes around Antarctica provide valuable records of sea-level changes. Understanding the timing and amplitude of Antarctic Ice Sheet changes during the last deglaciation is essential to assess the effect of ...
Suganuma, Yusuke, Yamasaki, Shintaro, Tokuda, Yuki, Takeshige Ishiwa, Ishiwa, Takeshige, Sasaki, Satoshi, Itaki, Takuya, Yusuke Suganuma, Takuya Itaki, Shintaro Yamasaki, Yuki Tokuda, Satoshi Sasaki   +11 more
core   +1 more source

Neural Network Normal Estimation and Bathymetry Reconstruction From Sidescan Sonar

IEEE 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

Use of remotely-derived bathymetry for modelling biomass in marine environments [PDF]

, 2013
The paper presents results on the influence of geometric attributes of satellite-derived raster bathymetric data, namely the General Bathymetric Charts of the Oceans, on spatial statistical modelling of marine biomass. In the initial experiment, both the
Niedzielski, Tomasz, Waldemar A. Spallek, Tomasz Niedzielski, Wieczorek, Małgorzata M., Priede, Imants G., Małgorzata M. Wieczorek, Spallek, Waldemar A., Godbold, Jasmin A., Wieczorek, Malgorzata M., Jasmin A. Godbold, Imants G. Priede   +10 more
core   +1 more source

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

Tellus: 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

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

Remote 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

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

Journal 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