Accession Number:

AD1183343

Title:

The Naval Seafloor Evolution Architecture: A Platform for Predicting Dynamic Seafloor Roughness

Descriptive Note:

[Technical Report, Formal Report]

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

• Kearney, William S.
• Penko, Allison M.

Report Date:

2022-07-28

Pagination or Media Count:

44

Abstract:

Predicting the temporal and spatial dynamics of seafloor roughness is important for understanding bottom boundary layer hydrodynamics. The Navy Seafloor Evolution Architecture NSEA is a platform for modeling the dynamic nature of the seafloor by combining hydrodynamic forcing information and observations from diverse sources. NSEAs three modules include a specification of hydrodynamic forcing, a seafloor evolution model, and a model to generate roughness realizations. It can be run in forward mode to predict seafloor roughness including the uncertainty from forcing information, or in inverse mode to estimate parameters from observed seafloor roughness. The model is demonstrated and shown to have good agreement with a field dataset of observed seafloor roughness. Similarly running in inverse mode, NSEA was demonstrated to predict the observed mean sediment grain size with good agreement. NSEAs modularity allows for a wide range of applications in hydrodynamic and acoustic modeling, and is built within an expandable framework that lends for coupling to such models with minimal effort.

Descriptors:

• computational science
• information science
• boundary layer
• acoustics
• data science
• differential equations
• probability distributions
• stochastic processes
• information processing
• probabilistic models
• statistical algorithms
• earth sciences
• partial differential equations
• probability
• acoustic propagation
• bayesian inference
• computational fluid dynamics

Subject Categories:

• Physical and Dynamic Oceanography
• Fluid Mechanics
• Acoustics

Distribution Statement:

[A, Approved For Public Release]