INTERACTION BETWEEN OFFSHORE PLUMES AND COASTAL CURRENTS DURING EXTREME FLOODING EVENTS

Abstract

This study investigates the formation of plumes resulting from the discharge of freshwater into the ocean from rivers and estuaries, exploring the transportation of sediments, nutrients, contaminants, and other substances from land to coastal saline waters. The buoyant nature of freshwater, less dense than the saline ocean, leads to the creation of a surface-floating layer influenced by coastal currents and winds. Understanding the processes of river discharge is crucial for assessing shelf life, with implications ranging from national defense strategies in line with near shore coastal rescue operations encompassing both domestic as well as foreign allies, the protection of global ecosystems, fisheries, in addition to enhancing the understanding of the shelf life of contaminants.To enhance comprehension and prediction, the research uses archived satellite imagery and high frequency radar derived surface currents to verify heavy rain events. It is hypothesized that radar currents can be used to predict plume trajectories. Radar current estimates, combined with wind speed and direction, help discern their impact on plume movement and longevity. These insights provide more accurate timeframes and information to agencies, government establishments, and the public. The study focuses on four rivers around Monterey Bay (Salinas, San Lorenzo, Pajaro, Carmel), along the Central California coastline, contributing valuable knowledge to mitigate risks and ensure public safety.