Aerial Photograph of Sendai Coast for Shoreline Behavior Analysis

Pradjoko, Eko; Tanaka, Hitoshi

doi:10.9753/icce.v32.sediment.92

Cited by 20 publications

(15 citation statements)

References 15 publications

(15 reference statements)

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“…However, the aerial photo ( Fig.2 (c)) contains no geo-reference data. Therefore, the aerial photo was rectified to comply with the coordinate system based on several control point 11) . The accuracy of the satellite images and aerial photo depends on the tidal level.…”

Section: Study Areamentioning

confidence: 99%

Investigation of the River Mouth Morphology Changes in Samegawa River Induced by the 2011 Great East Japan Earthquake Tsunami

Adityawan

Tanaka

Nagabayashi

2013

J. JSCE

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The river mouth morphology changes in the Samegawa river mouth during its recovery following The Great East Japan Tsunami of 2011 was investigated in this study by analyzing the water level data and aerial photo. The aerial photos provide valuable information on the changes. However, their availability is limited. The correlation coefficient and the linear gradient between the water level data in the river and the tidal level were analyzed. The river mouth narrowing, as well as the river mouth opening has been successfully detected. The assessed parameters correspond well with the condition obtained from the aerial photo analysis when available. In addition, these parameters also provide information on the river mouth condition when there are no aerial photo data. The proposed method in this study will provide an efficient way for analyzing and evaluating the morphology changes at a river mouth.

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Section: Study Areamentioning

confidence: 99%

Investigation of the River Mouth Morphology Changes in Samegawa River Induced by the 2011 Great East Japan Earthquake Tsunami

Adityawan

Tanaka

Nagabayashi

2013

J. JSCE

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“…Since the late 1930's, National Geodetic Science (NGS) has been using georeferenced, high-resolution aerial photographs for monitoring shoreline recession rates, beach changes, bluff tipping over, and relevant coastal changes [3]. Aerial images were used in [4] and [5] for analyzing shoreline positional changes. Satellite-imaging systems have also been utilized for monitoring coastal dynamics [6], [7], and [8].…”

Section: Introductionmentioning

confidence: 99%

Shorelines Extraction and Generalization Using Spatiotemporal Datasets

Elaksher¹

2017

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Abstract. This paper discusses integrating multiple remotely sensed measurements, spatiotemporal databases, coastal hydrological modeling, and geospatial information analysis to study the impact of water level changes on the shoreline geometry in order to support coastal geospatial information systems and decision making. Different shorelines are generated using a CTM and a WSM. The CTM is generated using multiple remotely sensed datasets and spatiotemporal databases, while the WSM is provided using a coastal hydrological model. Two shoreline generalization schemes are implemented to simplify the shoreline geometry. Experiments for estimating the shoreline geometry at different water levels were performed using each generalization scheme. The relationship between the shoreline geometry and the water levels was studied. High correlation between water level changes and the changes in the shoreline geometry was observed. The proposed algorithm can be used in creating or updating coastal geospatial databases, managing the dynamic natural of shorelines, and making scientific decisions in coastal environments.

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“…Tidal correction has not been applied to this measurement. More details on the uncertainty assessment of image analysis have been discussed by Pradjoko and Tanaka ( 2010 ).…”

Section: Study Area and Data Collectionmentioning

confidence: 99%

Post-Tsunami Lagoon Morphology Restoration Sendai; Japan

Hoang

Tanaka

Mitobe

2016

Tsunamis and Earthquakes in Coastal Environments

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The 2011 Great East Japan Earthquake and Tsunami caused signifi cant changes of morphology of Gamo Lagoon which is located in the northern part of Sendai Coast, Miyagi Prefecture. The investigation on the morphology changes and its recovery process after the tsunami are discussed. Frequently captured aerial photographs are effectively utilized to analyze detailed morphological changes in response to wave action after the tsunami. The lagoon area was greatly changed due to the 2011 tsunami, and a gradual process of river mouth changes and restoration were observed using aerial photographs. As compared with the shoreline position before the tsunami a 40 m retreat of the shoreline can be confi rmed even after 3 years from the tsunami. Meanwhile, the water area shows distinct reduction by 40 % as compared with the pre-tsunami situation. Gamo Lagoon is well known not only having important roles in the coastal processes but also valuable brackish water environment, hence further investigation is also largely required to better understand the future state of the devastated coastal environment by the tsunami waves.

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Aerial Photograph of Sendai Coast for Shoreline Behavior Analysis

Cited by 20 publications

References 15 publications

Investigation of the River Mouth Morphology Changes in Samegawa River Induced by the 2011 Great East Japan Earthquake Tsunami

Investigation of the River Mouth Morphology Changes in Samegawa River Induced by the 2011 Great East Japan Earthquake Tsunami

Shorelines Extraction and Generalization Using Spatiotemporal Datasets

Post-Tsunami Lagoon Morphology Restoration Sendai; Japan

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