1. Coastal and Marine Hazards and Resources
  2. Geoscience Data System

Field Activity 2018-617-FA

Identifier 2018-617-FA
Purpose Determine controls on sediment transport from the fore reef to the shoreline.
Location South Molokai, Hawaii
Summary argus files submitted by Shawn Harrison 8/29/2018
Info derived tide, wave height, wave period, wave direction, current speed, current direction, optical backscatter, acoustic backscatter, imagery.
Comments argus file update 9/6/2018
Projects
Platform
Alyce C
28-ft-long
Vehicles
None
Itinerary
Start Kaunakakai, Molokai, HI 2018-06-18
End Kaunakakai, Molokai, HI 2018-06-27
Days in the field 8
Bounds
West -157.19755503
East -157.12607593
North 21.10437892
South 21.06947819
Scuba operations Yes

Personnel

Organization
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Curt Storlazzi
Crew members
Information specialist(s)
Joshua Logan
Specialist, Information
Affiliate principal Lowe, Ryan (UWA); Hansen, Jeff (UWA); Pomeroy, Andrew (UWA)

Data types and categories

Data category: Imagery, Location-Elevation, Sampling, Time Series
Data type: Photo, Video, Navigation, Geology, Mooring (physical oceanography)

Equipment used

Equipment Usage description Data types Datasets
Structure from Motion - UAS Photo 6
instrumentmooring Mooring (physical oceanography) 3
RTK GPS LIDAR, Transects, Benchmarks, Profiles, Navigation 2
HD video camera system Video 4
Push corer Surveys (geochemical), Surveys (biological), Biology, Geology (no data reported)

Datasets

Datasets produced in this activity

Dataset name Equipment Description Dataset contact
3D bathymetric surfaces of low- and high-relief sites Structure from Motion - UAS 3D bathymetric surfaces of low- and high-relief sites from the coral reef flat off Waiakane, Molokai, were created using structure-from-motion (SfM) techniques. Evan T Dailey
Ground control point locations for the UAS survey Structure from Motion - UAS This portion of the data release presents the locations of the temporary ground control points (GCPs) used for the structure-from-motion (SfM) processing of the imagery collected during an unoccupied aerial system (UAS) survey of the coral reef off Waiakane, Molokai, Hawaii, on 24 June 2018. The GCP positions are presented in a comma-delimited text file. Joshua Logan
Orthomosaic imagery from the UAS survey Structure from Motion - UAS This portion of the data release presents a high-resolution orthomosaic image of the coral reef off Waiakane, Molokai, Hawaii. The orthomosaic has a resolution of 2.5 centimeters (cm) per pixel and was derived from structure-from-motion (SfM) processing of aerial imagery collected with an unoccupied aerial system (UAS) on 24 June 2018. Joshua Logan
Refraction-corrected bathymetric digital surface model (DSM) from the UAS survey Structure from Motion - UAS This portion of the data release presents a bathymetric digital surface model (DSM) from an unoccupied aerial system (UAS) survey of the coral reef off Waiakane, Molokai, Hawaii, on 24 June 2018. Joshua Logan
Refraction-corrected bathymetric point cloud from the UAS survey Structure from Motion - UAS This portion of the data release presents a bathymetric point cloud from an unoccupied aerial system (UAS) survey of the coral reef off Waiakane, Molokai, Hawaii, on 24 June 2018. Joshua Logan
UAS Structure from Motion - UAS Digital images and products from UAS SfM survey. Archived on FAD. Joshua Logan
Waiakane, Molokai, Hawaiian Islands, wave and water level data, 2018 instrumentmooring Time series data of water surface elevation, wave height, and water column currents and temperature were acquired at seven locations for 86 days off of Waiakane on the south coast of the island of Molokai, Hawaii, in support of a study on the coastal circulation patterns and the transformation of surface waves over the coral reefs. Kurt Rosenberger
West Maui, Hawaiian Islands, wave and water level data, 2017 instrumentmooring Time series data of wave height and water surface elevation were acquired at ten locations for 75 days south of Lahaina, off of the west coast of the island of Maui, Hawaii, in support of a study on the coastal circulation patterns and the transformation of surface waves over the coral reefs. Kurt Rosenberger
MolokaiHI_XYZ_20180626 RTK GPS Post-processed GNSS ground-survey data Shawn R Harrison
MolokaiHI_c2_20180625_ calibrationIOEO_ exampleImagery HD video camera system Example imagery used to solve intrinsic and extrinsic parameters Shawn R Harrison
MolokaiHI_c2_20180625_IO HD video camera system Images to solve camera intrinsic orientation along with solved parameters Shawn R Harrison
MolokaiHI_c2_20180626_EO HD video camera system Images to solve camera extrinsic orientation (raw and annotated) along with solved parameters and Ground Control Point (GCP) data Shawn R Harrison

Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
OpenFOAM models of low- and high-relief sites from the coral reef flat off Waiakane, Molokai, Hawaii instrumentmooring OpenFOAM Computational Fluid Dynamics (CFD) models were developed to simulate wave energy dissipation across natural rough reef surfaces on the reef flat off Waiakane, Molokai, Hawaii, to understand this process in the context of reef restoration design. A total of 140 models were developed (70 per low- and 70 per high-bed-relief domains). Models were calibrated and validated with oceanographic datasets collected in 2018. This data release presents the 140 model scenarios that can be readily input into OpenFOAM to recreate the results, in addition to a csv file indicating the parameters used for each model scenario. These model data accompany Norris and others (2023) [Norris, B.K., Storlazzi, C.D., Pomeroy, A.W.M., Rosenberger, K.J., Logan, J.B., and Cheriton, O.M., 2023, Combining field observations and high-resolution numerical modeling to demonstrate the effect of coral reef roughness on turbulence and its implications for reef restoration design: Coastal Engineering, https://doi.org/10.1016/j.coastaleng.2023.104331]. Ben Norris
MolokaiHI_c2_timestacks RTK GPS Timestack imagery and coordinate data Shawn R Harrison
MolokaiHI_c2_timestacks HD video camera system Timestack imagery and coordinate data Shawn R Harrison

Publications

Samples collected during this field activity