Derivation of geotechnical properties of mud flats from satellite imagery for the assessment of traf
Abstract
The trafficability of coastal soils depends on geotechnical properties. The long term goal of this work is to estimate geotechnical,properties of mud flats from optic and synthetic aperture radar satellite imagery to a level of accuracy that is sufficient to asses,s vehicle trafficability. The proposed study represents a key step towards a global trafficability assessment method using satellite, imagery, but it is also relevant for other naval applications such as navigability, unexploded ordnances detection and management,,and temporary/permanent infrastructure installation and stability. The geotechnical properties of soils are typically determined fro,m field or laboratory testing. However, time constrains or access restrictions may prohibit field testing or sample extraction. It h,as been shown that geotechnical properties are reflected in remotely sensed data such as optic reflectance and synthetic aperture ra,dar (SAR) backscatter intensity. However, tidal mud flats represent a unique challenge due to the significant spatial and temporal v,ariability of environmental conditions and likely responding geotechnical properties. Furthermore, few data sets exist that enable a, detailed analysis and correlation of remotely sensed data and geotechnical properties of tidal mud flats. A comprehensive data set,is available from three tidal mud flats in the Great Bay estuary which feature distinct geotechnical properties while still classify,ing as muddy tidal flats. Towards the abovementioned long term goal, it is proposed to use the Great Bay estuary satellite imagery a,nd geotechnical data set to pursue the following research objectives: 1) Statistic characterization of optic reflectance and synthet,ic aperture radar backscatter intensity of satellite images obtained from three tidal mud flats; 2) Correlation of optic reflectance, and synthetic aperture radar backscatter intensity with geotechnical properties such as undrained shear strength, water content, an,d bulk density; and3) Evaluation of remotely sensed properties or a combination of properties as assessment parameters for trafficab,ility of tidal mud flats. The duration of the proposed project is one year, and the PI will be supported by a graduate research assi,stant. Publication of results is anticipated at an international research conference and through a peer-reviewed journal submission.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 16, 2022
- Source ID
- N000142212401
Entities
People
- Nina Stark
Organizations
- Office of Naval Research
- United States Navy
- Virginia Tech