Beach Erosion and Preventive Countermeasure at Kangnan Coast, Taiwan

Liou, Jin Cheng; Chang, Han; Chen, Wei Wei; Liaw, Shyne Ruey

doi:10.2112/07-0950.1

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…At Figure 2, the method of FFT (Fast Fourier Transform) is a general method for converting the pressure waveform to the time series of water-level fluctuation, and if irregular waves overlap linear regular-waves, the pressure waveform can be expressed as the overlapping of component waves in the frequency domain by Fourier Transform. If the time series of pressure is p(t), the component waves in the frequency domain can be described as in (1).…”

Section: Journal Of Sensorsmentioning

confidence: 99%

“…However, large-scale harbor facilities and power generation sites are constructed through the coastal development promoted by the national or a local government, causing adverse effects on beautiful coastal environments. The wave diffraction occurs due to a newly constructed or extended coastal structures [1] and beach erosion occurs on a place where waves are concentrated, resulting in coastal erosion. Various studies regarding the coastal erosion are being carried out by many researchers, and among them, Liou [1] and Kim and Shim [2] installed a wave height meter on the target area, analyzed annual wave distribution, and studied the relationship between incident abnormal waves and coastal erosion.…”

Section: Introductionmentioning

confidence: 99%

“…The wave diffraction occurs due to a newly constructed or extended coastal structures [1] and beach erosion occurs on a place where waves are concentrated, resulting in coastal erosion. Various studies regarding the coastal erosion are being carried out by many researchers, and among them, Liou [1] and Kim and Shim [2] installed a wave height meter on the target area, analyzed annual wave distribution, and studied the relationship between incident abnormal waves and coastal erosion. Klaus [3] and Kim [4] carried out research on sand loss caused by seawall construction and sought to devise and establish measures to reduce such loss.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of Coastal Environment Change Using Wave Measurement Sensors and Geographical Laser Scanner

2019

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The construction of large-scale coastal structures in any coastal area may not only have direct effects on the coastal environment in that vicinity but also cause severe property damage. In order to prevent this problem, probable effects should be appreciated before any construction and the mechanism that may cause any probable damage must be accurately analyzed along with the plans to minimize damage. This study sought to analyze the cause and mechanism of damage inflicted on coasts by artificial structures through reviewing beach erosions that have occurred on beaches on the east coast of Korea after the large-scale construction of artificial structures, for which wave heights were measured in the vicinity of those structures, and the correlation between the measurements and the analysis data of waves and coastal erosion on the surrounding beach was analyzed. In addition, the correlation between coastal erosion and wave data was applied in order to understand what impact large waves have in relation to sand loss. Accordingly, a movable-bed physical model test was employed to appraise the factors that cause coastal erosion to take place.

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Section: Journal Of Sensorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of Coastal Environment Change Using Wave Measurement Sensors and Geographical Laser Scanner

2019

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“…An alternative way is to use the waterline extracted from a satellite image. The waterline is one type of shoreline indicator, defined as a wet/dry line on the beach, which is used to describe the land-water boundary at the instant of image processing [1]- [5]. For coastal engineering the waterline at mean sea level (MSL) is commonly defined as the shoreline.…”

Section: Introductionmentioning

confidence: 99%

Annual and Seasonal Shoreline Evolution of Tainan Gold Coast Using Multiband Satellite Images

Chang¹,

Chen²,

Tsai³

et al. 2018

IJET

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The beach of Tainan Gold Coast (TGC) has been suffering from beach erosion for the past decades. Few bathymetrical measurements are available to accurately estimate the annual and seasonal shoreline changes. Alternatively, the NDWI-based algorithm is used to extract the waterline of a satellite image and the shifting correction of a waterline to the shoreline due to tidal effect is proposed in the paper. The proposed method was examined to be valid for engineering application from a comparison with slight difference between two obtained shorelines and measured in-site shorelines for 2004 and 2006. Annual and seasonal rates of shoreline changes are estimated by the proposed method for TGC. The shoreline of the northern TGC moves onshore in the summer and oppositely offshore in the winter. The ratio per year at the southern beach of TGC is assessed to show severe erosion. The proposed method is applicable for studying the shoreline change.

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“…Also, Kim et al (2011;2012) introduced a newly designed artificial reef block and proved its effectiveness using both laboratory experiments and numerical simulations. Liou et al (2009) studied the causes of beach erosion at Kangnan Coas, Taiwan, and suggested submerged detached breakwater as a countermeasure plan in that area. Yang et al (2010) also investigated carefully about the beach erosion problems in the coast of Taiwan and tried to figure out the strategy of soft solutions in conjunction with hard structures based on the site studies with field observations.…”

Section: Introductionmentioning

confidence: 99%