权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Evaluation of impacts by sea-level rise on the alluvial deltas

海平面上升对冲积三角洲的影响评估

基本信息

批准号：
16204039
负责人：
TATEISHI Masaaki
金额：
$ 20.38万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

项目摘要

Sedimentological facies and biofacies have been analyzed and ages of 54 samples have been dated for alluvial sediments of 130 m core bored at Yoroigata, located in the western part of Niigata Plain On the basis of the results, burial process of the incised valley and sedimentary process of the Niigata plain by sea-level rise after the last glacial age have been reconstructed. Depression rate of the present area is about 3 mm/year during last 10,000 years.Changes of salt water intrusion as fluctuation of water discharge in low flow and high flow seasons, water quality of salt and fresh water; and sedimentological and chemical features of sediments in water masses and bottom sediments have been measured at the river mouth of Agano Rives Niigata. In the low flow season, salt water reached at 12 km from river mouth. Halocline by echo-sounding system revealed salt water wedge of weak-mixed type of salt/fresh water boundary. The important basic data has been get for movement and settle of fi … More ne-grained sediments.Prosperity and decline of longshore bars and sand beaches have been investigated geomorphologically and sedimentologically during dry and wet seasons at the Badon coast, Tra Vinh Province, Mekong River delta, south Vietnam. Geomorphology and sedimentary structure of surface of longshore bars and beaches have been changed as changes of direction and speed of longshore and wave currents during dry and wet seasons at the erosional and depositional coasts.The result of salt water intrusion measured along Co Chien Rivet one tributary of the Mekong River from 2000 to 2005 were summarized and published as papers.Occurrence mode of a lot of old woods appeared on the sea bottom surface off Izumozaki, Chuetsu district, Niigata, at the time of 2007 Chuetsu-Oki Earthquake has been investigated by scanning sonar. The analysis of 14C ages and species of woods were synthesized with occurrence mode on the sea bottom of the woods, and a formation and transportation processes of a lot of Jomon woods were discussed.The result of present study supplied the basic data for the detail consideration of formation. process of alluvial delta and plain Less

本文对新泻平原西部取心130 m的冲积物进行了沉积相、生物相分析和54个样品的年龄测定。在此基础上，重建了末次冰期后下切谷的埋藏过程和新泻平原因海平面上升而形成的沉积过程。本文测定了Agano Rives新泻河口盐水入侵随枯水期和丰水期水量波动的变化、盐水和淡水水质变化以及水团和底质沉积物的沉积学和化学特征。枯水期，咸潮可达河口12 km处.回声测深系统的盐跃层揭示了弱混合型咸淡水边界的盐水楔。为现场的火灾的发生、发展和稳定提供了重要的基础数据 ...更多信息在越南南部湄公河三角洲茶荣省巴东海岸，从地貌学和沉积学的角度，研究了干、湿季节沿岸沙坝和沙滩的繁荣。根据2000 ~ 2005年对湄公河支流沿着Co Chien Rivet的盐水入侵观测结果，分析了海岸侵蚀和沉积过程中，沿岸流和波流方向、流速的变化，改变了沿岸沙坝和海滩表面的地貌和沉积结构，并提出了一些建议2007年中越大地震发生时，新泻中越区出云崎近海海底表面出现了一个小坑，综合14 C年龄、树种分析和海底分布模式，探讨了大量绳纹木的形成和搬运过程，为进一步研究绳纹木的形成提供了基础资料。冲积三角洲和平原过程

项目成果

期刊论文数量（28）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Salt water intrusion in the Mekong River estuary, Vietnam : Observation at the Co Chien River from 2000 to 2002

越南湄公河口的咸水入侵：2000年至2002年在Co Chien河的观察

DOI：
发表时间：
2006
期刊：
Sci. Rept., Niigata Univ., (Geology) 21
影响因子：
0
作者：
Tateishi;M.;Nguyen;V.L.;Ta;T.K.O.;Tokuoka;T.;Fukita;A.;Nishimura;K.;Matsuda;S.;Suzaki;A.
通讯作者：
A.

Growth pattern of beach and dune ridges in the lower Mekong River Delta, Southern Vietnam

越南南部湄公河下游三角洲海滩和沙丘山脊的生长模式