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Monitoring of coastline changes along the Red Sea,Yemen based on remote sensing technique

Global Geology 2011年第4期14卷 241-248页

作者： Aref A.Sagheer Ahmed Humade Aref M.O.Al-Jabali Marine Science and Environment Faculty Hodeidah UniversityYemen Geological Survey and Mineral Resources Board Sana'aYemen

The coastline changes along Yemen＇s the Red Sea （Al-muka, Al-khohah, Al-tiaf, Ras Katib and Al- Urji spits） were studied using a series of landsat images （MSS, TM and ETM ＋ , 1972, 1989, 2000, 2006）, coupled with geomorphological, sedimentological and meteorological findings. Comparison of satellite images provided a viable means for establishing long-term coastal changes （accretion and erosion） as observed in the studied spits （Al-Urj, Ras Sham, Ras Maemoon, Ras Katib, Al-Mandar, Nukhaylah, Mujamilah, Ras Ashab Abu-Zahr and Mukha）. The rate of the spit accretion has the greatest value up to 89 pixel/year corresponding to 72 290 m2/year in Mukha, while the spit erosion shows greatest value up to 131 pixel/year corresponding to 106 404 m2/year in Mujamilab. The patterns of accretion and erosion along the spits depend on the spit direction, natural processes mainly of wave-induced longshore currents, the sediments supply and depth of sea.

关键词： coastline change landsat images Yemen Red Sea

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Numerical Simulation and Risk Analysis of Coastal Inundation in Land Reclamation Areas:A Case Study of the Pearl River Estuary

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Journal of Ocean University of China 2020年第6期19卷 1221-1234页

作者： DU Mei HOU Yijun GUO Yunxia WANG Kai Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Ocean and Climate Dynamics Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Coastal inundation results in many human casualties and significant economic *** this study,an inundation model with an unstructured mesh was developed using the ADvanced CIRCulation(ADCIRC)and Simulating WAves Nearshore(SWAN)models to simulate 43 inundation events from 1998 to 2018.A combined wind-pressure field derived from the assimilation windpressure model was used to drive the coupled ADCIRC-SWAN *** the basis of the model results,a sensitivity study of the influence of land reclamation on coastal inundation was *** results of the study showed that coastline changes caused by reclamation significantly influence the distribution of coastal inundation,particularly in areas where narrow waterways,bays,and peninsulas are newly *** the extreme inundation events calculated using the Gumbel and Weibull distributions,the 10-year,50-year,100-year,and 200-year return coastal inundations were obtained for the Pearl River Estuary in *** risk of coastal inundation was analyzed according to the probability of the inundation depth exceeding 1 m.A hazard grade zoning map was drawn to guide disaster relief and mitigation in the reclamation area.

关键词： coupled ADCIRC-SWAN model coastline change coastal inundation Pearl River Estuary risk analysis

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DEPOSITIONAL CHARACTER AND SHORELINE changeS OF THE NANDUJIANG DELTA,HAINAN ISLAND,CHINA

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Journal of Geographical Sciences 1994年第Z2期4卷 173-182页

作者： Wang Baocan Zhang Keqi(East China Normal University, Shanghai 200062 China People’s Republic of China)D. Eisma(Netherlands Instibe for Sea Research, Texel, The Netherlands)

The Nandujiang delta dates from at least 3000 yr ago and probably was fomred earlier during the Holocene. The present delta is built up of plain, channels, lagoos, spits, coastal barriers and *** currents are directed approximately east-west. The dominant waves come from NNE and are locally generated. Erosion occurs mainly on the east side of the delta. As the delta was growing outward into deeper water, the influence of marine processes increased and the delta changed from a river-dominated delta. Former branches were closed by littoral drift. The recent reduction in sediment suppy from the river, caused by the construction of a reservoir, has led to erosion of the coast. Three coastal sections of the delta are discussed in detail. Erosion mainly taks place on the foreshore and spits and barriers migrae inland covering former lagoon deposits. Measures to reduce further erosion and landward migration of the coastline are needed.

关键词： coastline change river mouth bar depositional system,Nandujiang River delta

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Methodological study of coastal geological hazard assessment based on GIS

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Journal of Groundwater Science and Engineering 2015年第1期3卷 77-85页

作者： LIU Jun CHENG Jian-mei JIANG Fang-yuan Land Resources Bureau of Changzhou City Changzhou Geoscience & Living Environment Institute School of Environmental Studies China University of Geosciences Shenzhen Investigation & Research Institute Co Ltd

The current researches on risk assessment of geological disasters mainly focus on unexpected disasters such as collapses, landslides and mud-rock flows etc. As the convergence zone of land and sea, coastal zone is the most active and complex area of interactions of lithosphere, hydrosphere, atmosphere, biosphere and anthroposphere. The ecological environment of coastal zone is very fragile, so further systematical research on coastal geological hazard assessment and prevention is in urgent need. The author begins with the definition and research contents and selects three typical coastal geological disasters, namely, the seawater intrusion, coastline change and sea-level rise as the objects of study. The systematic analysis and study on assessment system and methods are conducted, hazard assessment factors are selected, and a completely set of coastal disaster assessment system is established based on the technique of GIS. We took Bao’an District of Shenzhen City as an example and carried out a case study.

关键词： Costal zone Geological hazard GIS Seawater intrusion coastline change Sea-level rise

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