Abstract
Techniques for Detecting and Measuring Rip Currents
Highlights
IntroductionRip currents ( referred to as rips) are narrow areas of seaward-flowing water and represent the greatest hazard at surf beaches worldwide
Rip currents are narrow areas of seaward-flowing water and represent the greatest hazard at surf beaches worldwide
Researchers have employed a variety of methodologies to identify and measure rip currents, and the purpose of this paper is to review presently used and introduce some new low-cost techniques
Summary
Rip currents ( referred to as rips) are narrow areas of seaward-flowing water and represent the greatest hazard at surf beaches worldwide. The tell-tale signs include a tongue of sediment-laden water moving offshore, seaward movement of floating objects, unusual wave choppiness, and foamy water in the outer edges of the rip head, gap in the breaking waves, and darker water that indicates the presence of a rip channel. Polarizing sunglasses are often used to eliminate water glare, allowing for better observation of differential water coloration. Floating objects such as sticks and oranges, which are neutrally buoyant, can be thrown in the water to detect longshore, rip and tidal currents. Tracer dyes have been used to better delineate rips, especially when the telltale signs are not present or obvious
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