The Analysis of Beach Survey Data and Prediction on The Movement of Shore Line

Assessment of potential beach erosion risk and impact of coastal zone development: a case study on Bongpo–Cheonjin Beach

Natural Hazards and Earth System Science ◽

10.5194/nhess-21-3827-2021 ◽

2021 ◽

Vol 21 (12) ◽

pp. 3827-3842

Author(s):

Changbin Lim ◽

Tae Kon Kim ◽

Sahong Lee ◽

Yoon Jeong Yeon ◽

Jung Lyul Lee

Keyword(s):

Survey Data ◽

Coastal Zone ◽

Parabolic Type ◽

Sediment Supply ◽

Beach Erosion ◽

Aerial Photographs ◽

Erosion Risk ◽

Risk Curve ◽

Zone Development ◽

Beach Survey

Abstract. In many parts, coastal erosion is severe due to human-induced coastal zone development and storm impacts, in addition to climate change. In this study, the beach erosion risk was defined, followed by a quantitative assessment of potential beach erosion risk based on three components associated with the watershed, coastal zone development, and episodic storms. On an embayed beach, the background erosion due to development in the watershed affects sediment supply from rivers to the beach, while alongshore redistribution of sediment transport caused by construction of a harbor induces shoreline reshaping, for which the parabolic-type equilibrium bay shape model is adopted. To evaluate beach erosion during storms, the return period (frequency) of a storm occurrence was evaluated from long-term beach survey data conducted four times per year. Beach erosion risk was defined, and assessment was carried out for each component, from which the results were combined to construct a combined potential erosion risk curve to be used in the environmental impact assessment. Finally, the proposed method was applied to Bongpo–Cheonjin Beach in Gangwon-do, South Korea, with the support of a series of aerial photographs taken from 1972 to 2017 and beach survey data obtained from the period commencing in 2010. The satisfactory outcomes derived from this study are expected to benefit eroding beaches elsewhere.

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QUANTIFICATION OF SHORELINE RHYTHMICITY

Coastal Engineering Proceedings ◽

10.9753/icce.v19.145 ◽

1984 ◽

Vol 1 (19) ◽

pp. 145

Author(s):

Holly C. Garrow

Keyword(s):

Multivariate Analysis ◽

Survey Data ◽

Three Dimensional ◽

Eof Analysis ◽

Shoreline Position ◽

Dune Erosion ◽

Beach Morphology ◽

Topographic Data ◽

Alternative Approach ◽

Beach Survey

The study of beach morphology, for example, its changes with wave and tide conditions, is facilitated by the development of simple numerical values which characterize the morphology. Multivariate (EOF) analysis of topographic contour data is a means for determining important morphologic components which vary independently. If these components correspond to familiar shoreline features the researcher considers important, then the development of each component can be quantified by its significance, or weighting, in each sample. Alternatively, the components may be complicated and not useful in quantifying beach morphology. A study of these morphologic components, however, can provide insights into the dynamics of the beach system. If multivariate analysis produces complicated components, an alternative approach, of subjectively identifying shoreline characteristics of interest, can be taken. The characteristics may be the same as those frequently used in past studies, such as beach slope or sand volume. It is likely, though, that EOF analysis of topographic data will suggest more sophisticated characteristics which should be used. Some of these, for example, mean shoreline position or amplitude of a rhythmic shoreline, may be easily quantified, whereas, others such as longshore position of rhythmic features or cusp width relative to embayment width, may be more difficult to quantify. Both of these analysis approaches were applied to beach survey data obtained over a period of ten months (including the El Nifto winter of 1982/83) on Siletz Spit, Oregon. The shoreline was rhythmic with an 800-850 m wavelength throughout the duration of the study. Rhythmic topography has been associated with significant past beach and dune erosion at this site. Hence, it is of interest to describe the beach morphology quantitatively, and relate three dimensional beach changes to wave and tide conditions.

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A Correlation Analysis between a Swim Zone Width and Beach Survey Data in Sokcho Beach

Journal of Coastal Research ◽

10.2112/si65-168.1 ◽

2013 ◽

Vol 65 ◽

pp. 991-996 ◽

Cited By ~ 1

Author(s):

Hyung-Seok Lee ◽

In-Ho Kim ◽

Dong-Seob Song ◽

Jung L. Lee

Keyword(s):

Correlation Analysis ◽

Survey Data ◽

Zone Width ◽

Beach Survey

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Is the Personal Always Political?

Journal of Individual Differences ◽

10.1027/1614-0001/a000230 ◽

2017 ◽

Vol 38 (3) ◽

pp. 133-143 ◽

Cited By ~ 4

Author(s):

Danny Osborne ◽

Yannick Dufresne ◽

Gregory Eady ◽

Jennifer Lees-Marshment ◽

Cliff van der Linden

Keyword(s):

Survey Data ◽

National Survey ◽

Negative Relationship ◽

Openness To Experience ◽

Political Sophistication ◽

Knowledge Based

Abstract. Research demonstrates that the negative relationship between Openness to Experience and conservatism is heightened among the informed. We extend this literature using national survey data (Study 1; N = 13,203) and data from students (Study 2; N = 311). As predicted, education – a correlate of political sophistication – strengthened the negative relationship between Openness and conservatism (Study 1). Study 2 employed a knowledge-based measure of political sophistication to show that the Openness × Political Sophistication interaction was restricted to the Openness aspect of Openness. These studies demonstrate that knowledge helps people align their ideology with their personality, but that the Openness × Political Sophistication interaction is specific to one aspect of Openness – nuances that are overlooked in the literature.

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