A5050460892- Coastal and Marine Dynamics
- Tropical and Extratropical Cyclones Research
- Flood Risk Assessment and Management
- Aeolian processes and effects
- Ocean Waves and Remote Sensing
- Coastal wetland ecosystem dynamics
- Hydrology and Drought Analysis
- Oceanographic and Atmospheric Processes
- Remote Sensing and LiDAR Applications
- earthquake and tectonic studies
- Hydrological Forecasting Using AI
- Geotechnical Engineering and Soil Stabilization
- Geographic Information Systems Studies
- Coastal and Marine Management
- Hydrology and Sediment Transport Processes
- Sensor Technology and Measurement Systems
- Seismology and Earthquake Studies
- Seismic Waves and Analysis
- Earthquake and Tsunami Effects
- Network Security and Intrusion Detection
- Climate Change, Adaptation, Migration
- Ocean Acidification Effects and Responses
- Fluid Dynamics Simulations and Interactions
- Landslides and related hazards
- 3D Surveying and Cultural Heritage
University of California, Los Angeles
2018-2024
University of California, Irvine
2011-2023
Samueli Institute
2021
ORCID
2021
Scripps Institution of Oceanography
2013-2017
University of California, San Diego
2014-2017
Irvine University
2011-2014
Purdue University West Lafayette
2009
Abstract The El Niño-Southern Oscillation is the dominant mode of interannual climate variability across Pacific Ocean basin, with influence on global climate. two end members cycle, Niño and La Niña, force anomalous oceanographic conditions coastal response along margin, exposing many heavily populated regions to increased flooding erosion hazards. However, a quantitative record impacts spatially limited temporally restricted only most recent events. Here we report forcing 2015–2016 Niño,...
Coastal flooding is a significant and increasing hazard. There are multiple drivers including rising coastal water levels, more intense hydrologic inputs, shoaling groundwater urbanization. Accurate flood event prediction poses numerous challenges: representing boundary conditions, depicting terrain hydraulic infrastructure, integrating spatially temporally variable overtopping flows, routing overland flows incorporating signals. Tremendous advances in geospatial data quality, numerical...
Abstract Widespread erosion associated with energetic waves of the strong 2015–2016 El Niño on U.S. West Coast has been reported widely. However, Southern California was often sheltered from northerly approach direction offshore waves. The few large swells that reached were not synchronous highest tides. Although west coast‐wide tidal anomalies relatively in 2015–2016, California, total water levels (sum tides, anomalies, and wave superelevation) lower than during 1997–1998 Niño, comparable...
Abstract Waves overtop berms and seawalls along the shoreline of Imperial Beach (IB), CA when energetic winter swell high tide coincide. These intermittent, few-hour long events flood low-lying areas pose a growing inundation risk as sea levels rise. To support city response management, an IB warning system was developed. Total water level (TWL) forecasts combine predictions tides sea-level anomalies with wave runup estimates based on incident nonlinear model SWASH. In contrast to widely...
Abstract. Multivariate coastal flooding is characterized by multiple pathways (i.e., high offshore water levels, streamflow, energetic waves, precipitation) acting concurrently. This study explores the joint risks caused co-occurrence of marine levels and precipitation in a highly urbanized semi-arid, tidally dominated region. A novel structural function developed from multivariate analysis proposed to consider implications flood control infrastructure risk assessments. Univariate statistics...
Sea level rise will significantly increase the need for building and upgrading coastal protection such as dunes living shorelines. (Morris et al., 2020). Even if emission goals are reached, most coastlines experience an in mean sea levels energetic wave events storms Coastal measures, dune restorations engineered dunes, crucial adaptation efforts worldwide (Temmerman 2013; Morris 2022) hold many advantages over traditional hard engineering structures walls. However, at sites with more urgent...
Coastal aquifers are highly dynamic groundwater systems. Sea level rise will raise coastal water tables resulting in increased risk of shallow or emergent (Befus et al., 2020). Marine fluctuations cause the beach table to oscillate over a relatively large range. Wave action further elevates through wave setup (Li and Barry, 2000), infiltration from runup (Kang, 1994). Groundwater models that incorporate waves typically only consider setup, assuming is negligible. This may be incorrect at...
Human constructed dunes (i.e., ‘berms’) play a critical role in protecting urbanized coastal communities. US flood losses 2020 were approximately $31.2 billion and are expected to increase $40.6 by 2050 because of climate change (Wing et al., 2022). Beach-berm systems serve as natural, dynamic defense system against energetic waves high-water levels. Berm characteristics typically function the sand’s angle repose available heavy equipment. Placements may also have access or aesthetic aspects...
Abstract Wave conditions in Southern California during the 2015–2016 El Niño were similar to 2009–2010 Niño, previously most erosive (minimum beach widths and subaerial sand levels) a 7 year record. As of February 2016, Torrey Pines Beach had eroded slightly below levels, threatening shoulder major highway. However, Cardiff, Solana, Imperial Beaches, nourished with imported 2012, on average 1–2 m more elevated than 10 wider 2009–2010. Monthly elevation observations showed that beaches...
Abstract Following the Ridgecrest earthquake sequence, consisting of an M 6.4 foreshock and 7.1 mainshock along with many other events, Geotechnical Extreme Events Reconnaissance association deployed a team to gather perishable data. The focused their efforts on documenting ground deformations including surface fault rupture south Naval Air Weapons Station China Lake, liquefaction features in Trona Argus. published report within two weeks mainshock. This article presents data products...
Urban coastal flooding is a global humanitarian and socioeconomic hazard. Rising sea levels will increase the likelihood of hydrologic events interacting with high marine water levels. These compound may, in turn, nonlinearly interact urban infrastructure, potentially resulting more extreme events. Here, an integrated Delft3D-FM based numerical modeling framework used to concomitantly resolve multi-source flood processes (i.e., levels, precipitation) infrastructure (e.g., seawalls, storm...
Stanley, J.-D. and Corwin, K.A., 2013. Measuring strata thicknesses in cores to assess recent sediment compaction subsidence of Egypt's Nile Delta coastal margin. Coastal flood risk California is concentrated around urbanized embayments that are protected by infrastructure, such as levees, pumps, walls, which pose a challenge accurate prediction. A capability predict urban flooding at the parcel-scale (individual home or street) from high ocean levels (extreme tides) shown here coupling...
Schubert, J.E.; Gallien, T.W.; Majd, M.S., and Sanders, B.F., 2015. Terrestrial laser scanning of anthropogenic beach berm erosion overtopping.Anthropogenic berms are widely deployed to manage coastal flooding. The dynamic scraped exposed waves a rising tide in southern California was monitored with terrestrial scanner (TLS) on three occasions February March 2012. An improved characterization initial geometry the dynamics pursued accurately predict onset impact flooding associated...
Abstract The 2015–2016 El Niño provided insight into how low-inflow estuaries might respond to future climate regimes, including high sea levels and more intense waves. High waves water coupled with low rainfall along the Southern California coastline opportunity examine extreme ocean forcing impacts independently from fluvial events. From November 2015 April 2016, were measured in 13 estuaries, both intermittently closed perennially open varying watershed size, urban development, management...
Abstract The dynamic interaction between swash and beach groundwater is fundamental to understanding wave runup sediment transport processes. A numerical model that simultaneously resolves free surface porous media flow for a variably saturated subsurface presented. novel model, SedOlaFlow, developed by merging the existing two‐phase, Eulerian SedWaveFoam, with solver, olaFlow. SedOlaFlow validated large flume data dam‐break driven over permeable gravel sand beaches. Sediment size...
A novel hybrid (e.g., vegetation, sand, cobble, rip-rap) nature-based dune structure was constructed at Cardiff State Beach in Encinitas, California, to protect a critical transportation artery from undermining and frequent flooding. collaboration between regulators, funders, state agencies, professional practice academia developed high resolution robust unmanned aerial vehicle (UAV) based monitoring strategy observe construction evolution. Fifteen surveys were conducted each substrate...
Sheet flow driven by a near-breaking transient wave is numerically investigated using SedFoam, two-phase Eulerian sediment transport model in the OpenFOAM framework. SedFoam resolves full profile of processes within bottom boundary layer based on closures for intergranular stresses and fluid–particle interactions. Compared with large-scale flume data, good agreements are obtained streamwise velocity profiles, concentration sheet thickness. Model results show near-bed evolution layer. Intense...
Marine outfalls discharge wastewater on the inner shelf and are designed to encourage rapid effluent mixing sufficient maintain a submerged wastefield. A high-resolution nonhydrostatic Regional Ocean Modeling System (ROMS) model was used resolve concomitantly intermediate- far-field submarine plume development. ROMS simulations were validated with cross-flow laboratory experiments. Generally, results showed that is capable of resolving dynamics in typical conditions. Top-of-plume elevation...