S. Grant W.C. O’Reilly F. Feddersen R.T. Guza CDIP Wave MOnitoring & Prediction (MOP) System Surfzone Currents & Beach Water Quality Huntington Beach – Case Study

CDIP Directional Wave Buoy Network Alongshore Prediction of Nearshore Waves Alongshore Prediction of the Surfzone Current Directions and Speeds Surfzone Pollutant Trajectory Model Surfzone Source Detection Model FIB ENT Counts vs. Current Direction

CDIP Directional Wave Buoy Network Alongshore Prediction of Nearshore Waves Alongshore Prediction of the Surfzone Current Directions and Speeds Surfzone Pollutant Trajectory Model Surfzone Source Detection Model FIB ENT Counts vs. Current Direction

MOP The CDIP MOnitoring & Prediction System Outer & Inner wave buoys are placed at wave model boundaries for assimilation and validation. PLAN VIEW Shelf Break Global Model Shelf Model Local Model Shelf Model CROSS SECTION Local Model Surfzone Current Model

Southern California Wave Observation Network So Cal MOP System Datawell Directional Waveriders

Southern California Wave Observation Network So Cal MOP System Outer Wave Buoys Measure Arriving Swell from the Open Ocean

Southern California Wave Observation Network So Cal MOP System Inner Wave Buoys Measure Locally Generated Seas

Southern California Wave Observation Network So Cal MOP System Huntington State Beach “Roving” Wave Buoy (20m depth)

CDIP Directional Wave Buoy Network Alongshore Prediction of Nearshore Waves Alongshore Prediction of the Surfzone Current Directions and Speeds Surfzone Pollutant Trajectory Model Surfzone Source Detection Model FIB ENT Counts vs. Current Direction

CDIP MOnitoring and Prediction Orange County MOP Sites HB06 Surfzone Current Model Validation

Mean Alongshore Current Model Validation Northward Current Southward Current Flow Reversal Sep-Oct

CDIP Directional Wave Buoy Network Alongshore Prediction of Nearshore Waves Alongshore Prediction of the Surfzone Current Directions and Speeds Surfzone Pollutant Trajectory Model Surfzone Source Detection Model FIB ENT Counts vs. Current Direction

Summer Mean Surfzone Currents: North OC

Pollutant Trajectory Age : Constant SAR Discharge

EBB Discharge Trajectory from Magnolia Street Ebb Strength Strong Weak

CDIP Directional Wave Buoy Network Alongshore Prediction of Nearshore Waves Alongshore Prediction of the Surfzone Current Directions and Speeds Surfzone Pollutant Trajectory Model Surfzone Source Detection Model FIB ENT Counts vs. Current Direction

Waves Surfzone current FIB Sites Pollutant Source LOWER ENT COUNTS HIGHER ENT COUNTS

Magnolia St Ebb Discharge Model w/ FIB Overlay (Summer) ENT < > 30

Magnolia St. Ebb Discharge Model w/ FIB Overlay (Summer) ENT < > 30