![]() ![]() In order to integrate this diverse range of research this volume’s regional approach first integrates the latest data with longstanding theory and then analyses this research through the boundary conditions that exist in each area. The past decade has seen a reinvigoration of research driven by advances in technology that now enable precise measurements of erosion to the micron scale and quantification of wave energy onto and through cliff edifices to be made, as well as being able to directly date rock surfaces. Cliffs and shore platforms form spectacular landscapes, yet when compared to other landforms they are relatively unstudied with many contemporary controversies dating back to the mid-nineteenth century. Rocky landforms dominate large portions of the world’s coast. The book is designed for use in the classroom and the office, beingaimed at university level students and coastal professioanls.ĭownload Rock Coast Geomorphology Book in PDF, Epub and Kindle This book is the first to: * provide an in-depth and holistic view of beach systems, lookingboth in detail at the different beach zones and globally at rangeof parameters influencing regional variation * examine the relationship between beaches and ancillary dunesystems and includes chapters on beach ecology, safety,stratification and barrier evolution. They represent a narrow zone where waves, tidesand winds continously interact, producing, wherever sediment isavailable, hundreds of thousands of kilometres of beach systems.Beaches are also the focus of intense pressure from users anddevelopers, and for these reasons alone a knowledge of beachsystems and their morphodynamics is critical to their sustainablemanagement. The beach and adjacent shoreface are the most dynamic part of theEarth's surface. The strong influence of reefs on spatial and temporal variability in coastal erosion and accretion showed that it cannot be assumed that reefed coasts behave the same as non-reefed coasts, nor can it be assumed that reefs always protect beaches.ĭownload Handbook of Beach and Shoreface Morphodynamics Book in PDF, Epub and KindleĪ highly readable book on the nature of beaches, including thedynamics of the shoreface, surf, swash and backbeach, and globallyat the regional variations in beach systems from the tropics to thepoles. For example, while reefs sometimes reduced beach erosion, they could also inhibit recovery due to: sediment being unable to overtop the reef unless a sand ramp was present and longshore current jets constricted by the reefs that transported sand away from some areas to create erosion 'hot spots'. Moreover, the commonly-mentioned assumption that reefs always protect beaches was shown to not always be true at some spatial and temporal scales and during certain conditions. The reefs caused variability in the mode and magnitude of sand transport within just tens of metres on hourly time-scales up to kilometres on inter-annual time-scales. This was based on multi-scale field deployments during sea breezes and storms, and monthly to seasonal time scales. The influence of the reefs on coastal morphodynamics from hours to decades was investigated in detail at one type of perched beach: a sandy beach with reefs at Yanchep Lagoon in southwest Australia. ![]() ![]() These elements can vary morphologically within 8 attributes, such as roughness, elevation relative to tidal range, alongshore porosity and cross-shore width. It is based on four morphological elements (reefs, pavement, horizontal platforms and ramps) that can have common morphologies regardless of what substance the structure is made of (limestone, coral, beachrock, etc.). A novel feature of this classification is its universality and flexibility. To provide a framework for this process-based research, the first fully-comprehensive classification was developed of morphotypes of rock and coral formations supporting perched beaches. The goal of this thesis was to investigate how coastal reefs influence spatial and temporal variability in coastal erosion and accretion, over nested temporal and spatial scales. In addition, many beaches with engineered structures such as shore-parallel breakwaters and artificial reefs may also be considered as perched. Naturally-formed perched beaches are due to coral and rock formations that are present along much of the world's coastline. Download Classification of Perched Beach Morphotypes and the Influence of Coastal Reefs on Sandy Beach Morphodynamics During Storms and Sea Breezes Book in PDF, Epub and KindleĪ perched beach is a beach that either overlies a hard substrate or has a hard substrate seaward, but that is landward of the depth of closure. ![]()
0 Comments
Leave a Reply. |