Nearshore bathymetry estimation using UAV

Matsuba, Yoshinao; Sato, Shinji

doi:10.1080/21664250.2018.1436239

Cited by 35 publications

(18 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, it is not possible to isolate the accuracy of the calibration from that of the bathymetry. However, the RMSE and bias are generally lower than those of other studies (e.g., [30][31][32]) (with RMSE in the range of 0.25 to 0.50 m and biases from 0.2 to 0.3 m).…”

Section: Discussioncontrasting

confidence: 67%

“…The recent improvement and cost reduction of small Unmanned Aerial Vehicles (UAVs) allows to use the tools developed for video monitoring stations in places where measurements are required and no video station is available, either because there is not a high vantage point or because only a single survey is needed. Recent works have already explored the use of videos recorded with UAVs to obtain bathymetry [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Camera Calibration on Nearshore Bathymetry Estimation from UAV Videos

et al. 2021

View full text Add to dashboard Cite

Measuring the nearshore bathymetry is critical in coastal management and morphodynamic studies. The recent advent of Unmanned Aerial Vehicles (UAVs), in combination with coastal video monitoring techniques, allows for an alternative and low cost evaluation of the nearshore bathymetry. Camera calibration and stabilization is a critical issue in bathymetry estimation from video systems. This work introduces a new methodology in order to obtain such bathymetries, and it compares the results to echo-sounder ground truth data. The goal is to gain a better understanding on the influence of the camera calibration and stabilization on the inferred bathymetry. The results show how the proposed methodology allows for accurate evaluations of the bathymetry, with overall root mean square errors in the order of 40 cm. It is shown that the intrinsic calibration of the camera, related to the lens distortion, is the most critical aspect. Here, the intrinsic calibration that was obtained directly during the flight yields the best results.

show abstract

Section: Discussioncontrasting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

The Influence of Camera Calibration on Nearshore Bathymetry Estimation from UAV Videos

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In recent years, robust depth estimation methods through wave celerity inversion have been developed for shore-based video systems and drones [92,100,102,103], optimizing the information gathered in space and time (generally 10-20 min). At present, there are some pioneering works on video from space to recover coastal bathymetry [104][105][106] that clearly show the potential to derive waves from a sequence of images.…”

Section: Video From Space: a Showcase With Pleiades Persistent Modementioning

confidence: 99%

Monitoring Beach Topography and Nearshore Bathymetry Using Spaceborne Remote Sensing: A Review

et al. 2019

View full text Add to dashboard Cite

With high anthropogenic pressure and the effects of climate change (e.g., sea level rise) on coastal regions, there is a greater need for accurate and up-to-date information about the topography of these systems. Reliable topography and bathymetry information are fundamental parameters for modelling the morpho-hydrodynamics of coastal areas, for flood forecasting, and for coastal management. Traditional methods such as ground, ship-borne, and airborne surveys suffer from limited spatial coverage and temporal sampling due to logistical constraints and high costs which limit their ability to provide the needed information. The recent advancements of spaceborne remote sensing techniques, along with their ability to acquire data over large spatial areas and to provide high frequency temporal monitoring, has made them very attractive for topography and bathymetry mapping. In this review, we present an overview of the current state of spaceborne-based remote sensing techniques used to estimate the topography and bathymetry of beaches, intertidal, and nearshore areas. We also provide some insights about the potential of these techniques when using data provided by new and future satellite missions.

show abstract

“…The installation of shore-based video stations to monitor the nearshore is increasingly used due to their possibilities and low cost. Combining these video techniques with the use of Unmanned Aerial Vehicle (UAV) has also greatly enlarged the scope of application of these methods (e.g Turner and Harley, 2016;Matsuba et al 2018)…”

mentioning

confidence: 99%

The Contribution of Wind-Generated Waves to Coastal Sea-Level Changes

et al. 2019

View full text Add to dashboard Cite

Surface gravity waves generated by winds are ubiquitous on our oceans and play a primordial role in the dynamics of the ocean-land-atmosphere interfaces. In particular, wind-generated waves cause fluctuations of the sea level at the coast over timescales from a few seconds (individual wave runup) to a few hours (wave-induced setup). These wave-induced processes are of major importance for coastal management as they add up to tides and atmospheric surges during storm events and enhance coastal flooding and erosion. Changes in the atmospheric circulation associated with natural climate cycles or caused by increasing greenhouse gas emissions affect the wave conditions worldwide, which may drive significant changes in the wave-induced coastal hydrodynamics. Since sea-level rise represents a major challenge for sustainable coastal management, particularly in low-lying coastal areas and/or along densely urbanized coastlines, understanding the contribution of wind-generated waves to the long-term budget of coastal sea-level changes is therefore of major importance. In this review, we describe the physical processes by which sea states may affect coastal sea level at several timescales, we present the methods currently used to estimate the wave contribution to coastal sea-level changes, we describe past and future wave climate variability, we discuss the contribution of wave to coastal sea-level changes, and we discuss the limitations and perspectives of this research field.

show abstract

Nearshore bathymetry estimation using UAV

Cited by 35 publications

References 9 publications

The Influence of Camera Calibration on Nearshore Bathymetry Estimation from UAV Videos

The Influence of Camera Calibration on Nearshore Bathymetry Estimation from UAV Videos

Monitoring Beach Topography and Nearshore Bathymetry Using Spaceborne Remote Sensing: A Review

The Contribution of Wind-Generated Waves to Coastal Sea-Level Changes

Contact Info

Product

Resources

About