Sebastian Pitman

Sebastian Pitman
University of Canterbury | UC

PhD

About

23
Publications
5,269
Reads
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113
Citations
Additional affiliations
March 2017 - May 2017
University of Southampton
Position
  • PhD Student

Publications

Publications (23)
Article
Recent research into rip currents has revealed the existence of multiple circulation patterns, meaning that no single escape strategy is appropriate in all situations. Rip circulation is influenced by surfzone morphology, which can be inferred from wave breaking patterns in video imagery. Wave breaking often occurs over the bars adjacent to the rip...
Article
Full-text available
Drowning and fatalities at sea are a large concern globally. In the UK, many sea rescues are performed by the Royal National Lifeboat Institution, and this study investigates 6 years’ worth of their rescue data to better understand causation of drowning and what makes an incident at sea high risk. A Poisson model is applied to numerous factors reco...
Article
Full-text available
Beach ridge stratigraphy can provide an important record of both sustained coastal progradation and responses to events such as extreme storms, as well as evidence of earthquake induced sediment pulses. This study is a stratigraphic investigation of the late Holocene mixed sand gravel (MSG) beach ridge plain on the Canterbury coast, New Zealand. Th...
Article
Unmanned aerial vehicles (UAVs) have widely been documented as accessible, low cost, high-resolution coastal monitoring platforms. To date, however, UAVs have primarily been employed in coastal research as an alternative to traditional survey methods, such as beach profiling, despite their capabilities far exceeding such uses. In this contribution,...
Article
Around 372 000 people drown every year globally. In countries, such as the UK, a large proportion of these deaths are due to recreational boating accidents, and a dominant factor influencing the outcome is whether the person was wearing a personal flotation device (PFD). The rate of PFD wear is low around the world, with reported rates ranging from...
Article
Along the northeast coast of New Zealand’s South Island, a 7.8 Mw earthquake on the 14th of November 2016 induced instantaneous uplift of approximately 1 m around the Kaikōura Peninsula. This paper documents a unique field study examining short-term responses in the Mixed Sand and Gravel (MSG) beaches of Kaikōura to a relative sea level fall as a r...
Article
Full-text available
Rip currents (“rips”) are the leading cause of drowning on surf beaches worldwide. A major contributing factor is that many beachgoers are unable to identify rip currents. Previous research has attempted to quantify beachgoers' rip identification ability using photographs of rip currents without identifying whether this usefully translates into an...
Preprint
Full-text available
Rip currents ("rips") are the leading cause of drowning on surf beaches worldwide. A major contributing factor is that many beachgoers are unable to identify rip currents. Previous research has attempted to quantify beachgoers' rip spotting ability using photographs of rip currents, without identifying whether this usefully translates into an abili...
Conference Paper
Full-text available
Beach cusps are often more prominent on beaches composed of coarse or mixed sediments, as opposed to sand alone. For cusps on mixed sediment beaches, one of the most important morphological characteristics to quantify is the surface sediment texture distribution, differentiating between sand and gravel units on the beachface. Despite this, most res...
Article
Full-text available
Everyone enjoys visiting the beach and playing or swimming in the water, but sometimes, waves breaking on beaches can create strong, narrow currents that can pull you out of your depth and into deeper water, where you may find yourself in trouble. We call these rip currents, and they are the main cause of drowning and rescues on surf beaches. The b...
Article
In deciding whether the water at the beach is safe to enter, one key parameter on which people base their assessment is the size of breaking waves. To understand the accuracy with which wave height can be visually estimated, this study utilises 1566 observations of wave height made by New Zealand’s Surf Life Saving Northern Region’s lifeguards over...
Poster
Full-text available
Following the 7.8Mw Kaikoura earthquake on the 14th of November 2016, the region underwent dramatic changes. The coastline was uplifted up to 1m within the study area, particularly around the peninsula. This research set out to identify the responses seen in the unconsolidated coastal environments following this event. The results highlight that th...
Article
Rip current circulation and surf zone retention on a double barred beach. Margo (2018), Abstract Rip currents have an important control on the exchange of water and advected materials such as sediment and pollutants, between the surf zone and inner shelf. Concurrent in situ Eulerian and Lagrangian (GPS drifter) data of surf zone waves and currents...
Thesis
Rip currents (rips) are hazardous offshore-directed flows in the surfzone of beaches worldwide. Rips are a major hazard for recreational beach use and are the dominant cause of beach rescues and drownings. It is therefore important to understand what conditions make a rip most hazardous, in order for beach safety practitioners to mitigate the risk....
Article
Rip currents (rips) are the global leading cause of fatalities on surf beaches, yet numerous long-standing misconceptions exist. Evidence of the prevalence of these myths is largely anecdotal. This opportunistic, exploratory study presents perceptions on rip current hazards (n = 187), of members of the public attending an open day at the National O...
Conference Paper
The exchange of material between the surf zone and continental shelf can be driven by pulsations in rip current velocities. However, there is a poor understanding of the relationship of these pulsations to surf zone morphology and material exchange. Moreover, understanding of rip current dynamics has focused mainly on single-barred beaches in an in...
Article
The exchange of material between the surf zone and continental shelf can be driven by pulsations in rip current velocities. However, there is a poor understanding of the relationship of these pulsations to surf zone morphology and material exchange. Moreover, understanding of rip current dynamics has focused mainly on single-barred beaches in an in...
Conference Paper
Full-text available
Rip currents are a major hazard on beaches worldwide. Although in-situ measurements of rips can be made in the field, it is generally safer and more cost effective to employ remote sensing methods, such as coastal video imaging systems. However, there is no universal, fully-automated method capable of detecting rips in imagery. In this paper we dis...
Conference Paper
Full-text available
Rip currents are the main cause of beach rescues and fatalities. Key drivers of rip current hazard are: (1) fast current speeds; and (2) the exit rate of floating material from inside to outside of the surf zone. Exit rates may vary temporally, such as due to Very Low Frequency (VLF) motions, which have a period on the order of 10 minutes. However,...
Chapter
Full-text available
Swash action is the dominant process responsible for the cross-shore exchange of sediment between the subaerial and subaqueous zones, with a significant part of the littoral drift also taking place as a result of swash motions. The swash zone is the area of the beach between the inner surfzone and backbeach that is intermittently submerged and expo...
Thesis
Full-text available
A novel remote sensing method is presented that accurately predicts 2% run up and run down thresholds on a gravel beach under calm (H s < 2 m) conditions. This overcomes the common problem of ascertaining accurate field measurements in the energetic swash zone of a gravel beach where damage to equipment is commonplace. The optical image intensity f...

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Projects

Project (1)
Project
This project involves a number of studies aimed at quantifying the contemporary processes, but also Holocene history, of mixed sand and gravel coastlines around New Zealand. Elements of the project include investigation of beach cusps dynamics, storm response, and even response to seismic events.