International Association for Gondwana Research 2009 Annual Convention and Gondwana to Asia Symposium,Hanoi, Vietnam     

Trinh Hai Son 《Gondwana Research》2009,15(2):223

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<国际地震动态>创刊30周年的回顾   总被引：1，自引：0，他引：1  

宋守全 《国际地震动态》2001,(5):3

在新世纪第一年的 5月迎来了《国际地震动态》创刊 30周年纪念。“30而立”一般泛指人到 30岁左右日臻成熟或在事业上取得初步成就 ,而对于一个已创办了 30年的刊物来说似也具有较为特殊的意义。作为本刊的创刊主编 ,此刻抚今追昔 ,不胜感慨 ,略作些许回顾 ,愿与本刊新老读者共飨。 1　本刊的历史沿革首先在此赘述几句 ,本人在文革前一直在外事单位工作 ,其中工作之一是先后主持编辑出版过英文周刊《北京动态》 (What's on inPeking)和参加编辑过中文周刊《国际文化动态“参考资料版”》;文革后调至地球物理研究所直至 1 987年 8月退休。来…  相似文献   

Occurrence of phthalate esters around the major plastic industrial area in southern Taiwan     

Acharee Kaewlaoyoong  Chi Thanh Vu  Chitsan Lin  Chien Sen Liao  Jenq-Renn Chen 《Environmental Earth Sciences》2018,77(12):457

The increasing usage and disposal of plastic products could cause the wide distribution of phthalate esters (PAEs) in various environmental media. In this study, six PAE compounds, namely dimethyl phthalate, diethyl phthalate, di-n-butyl phthalate, benzyl butyl phthalate, di(2-ethylhexyl) phthalate (DEHP), di-n-octyl phthalate, were analyzed in various samples collected from the major plastic industrial area of southern Taiwan, including soil, fertilizer and plastic products, for the purposes of identifying of the possible sources of PAEs and assessing the related health risk. The results show that PAEs in soil samples was dominated by DEHP, with the total concentrations in the range of 0.7?±?0.5, 0.2?±?0.1, and 0.3?±?0.2 mg kg^?1 for soil samples from farmland, household back gardens and the roadside, respectively. Contents of PAEs in chemical fertilizer (ND—0 0.87 mg kg^?1) were higher than that in organic fertilizer (ND—0.08 mg kg^?1), and PAEs concentrations (ND—316 mg kg^?1) in plastic mulching films were much less than those in the other types of plastic products (ND—1719 mg kg^?1), implying that major sources of PAEs in agricultural soil could be the use of chemical fertilizer and plastic products other than plastic mulching films. Health risk assessment suggested that, via the exposure to PAEs in soil, the potential non-cancer and carcinogenic risks for adults and children are minimal in most cases, except that a “moderate” carcinogenic risk for children exposure to DEHP. The results of this study can serve as a reference for further pollution prevention and environmental protection plans in relation to the industrial operation and discharge as well as the farming practices.  相似文献   

Using Geomorphological Indicators to Predict Earthquake Magnitude (MOb‒Max): A Case Study from Cao Bang Province and Adjasent Areas (Vietnam)     

Trong  C. D.  Hoang  N.  Bach  M. X.  Luc  N. M.  Dung  L. V.  Trieu  C. D.  Syrbu  N. S.  Hai  D. Th.  Tuan  Th. A.  Toan  N. Q.  Thanh  D. V. 《Geotectonics》2022,56(3):321-338

Geotectonics - This paper presents analysis of geomorphological indices for predicting the maximum observed earthquake (MOb?Max) in research region, conducted in three steps: (i)...  相似文献   

The Interactive Effects of Natural Factor and Pollution Source on Surface Water Quality in the Lower Mekong River Basin,Southwestern Vietnam     

Binh Thanh Nguyen  Vo  Long Dinh  Nguyen  Tong Xuan  Quang  Ngo Xuan 《Water Resources》2020,47(5):865-876

Water Resources - Surface water quality could be interactively affected by the natural factor (seasonal variation) and human pollution source (industrial, agricultural, and residential sources)....  相似文献   

Sediment transport trends and cross-sectional stability of a lagoonal tidal inlet on the Central Coast of Vietnam     

Do Minh Duc  Tran Thanh Tung  Patrick McLaren  Tran Ngoc Anh  Dinh Thi Quynh 《国际泥沙研究》2019,34(4):322-334

Lagoonal tidal inlets are a typical morphology of the Central Coast of Vietnam. Recently, navigation channels in these inlets have become increasingly threatened by siltation. This study analyses the relations between sediment distribution and transport trends (using the technique of Sediment Trend Analysis-STA■) in the lagoonal system of the De Gi inlet and then proposes appropriate countermeasures against sand deposition in the navigation channel. The STA identified three types of transport trends in the De Gi inlet, namely dynamic equilibrium, net accretion, and net erosion. Processes associated with the tidal prism have resulted in trends of sediment transport and deposition across the flood and ebb tidal shoals, which maintain a present cross-sectional area of about 1000m^2. However, longshore sediment transport from north to south resulting from northeast waves cause additional sand deposition in the channel. In addition, the effects of refraction associated with a nearby headland and jetty also increase sedimentation. These processes provide the main reasons for sediment deposition in the De Gi inlet. Short term and regular dredging helps to maintain the navigation channel. A system comprised of three jetties (north, south, and weir) is necessary to ensure the longterm cross-sectional stability of the navigation channel.  相似文献   

Improved Chlorophyll-a Algorithm for the Satellite Ocean Color Data in the Northern Bering Sea and Southern Chukchi Sea     

Sang Heon Lee  Jongseong Ryu  Jung-woo Park  Dabin Lee  Jae-Il Kwon  Jingping Zhao  SeungHyun Son 《Ocean Science Journal》2018,53(3):475-485

The Bering and Chukchi seas are an important conduit to the Arctic Ocean and are reported to be one of the most productive regions in the world’s oceans in terms of high primary productivity that sustains large numbers of fishes, marine mammals, and sea birds as well as benthic animals. Climate-induced changes in primary production and production at higher trophic levels also have been observed in the northern Bering and Chukchi seas. Satellite ocean color observations could enable the monitoring of relatively long term patterns in chlorophyll-a (Chl-a) concentrations that would serve as an indicator of phytoplankton biomass. The performance of existing global and regional Chl-a algorithms for satellite ocean color data was investigated in the northeastern Bering Sea and southern Chukchi Sea using in situ optical measurements from the Healy 2007 cruise. The model-derived Chl-a data using the previous Chl-a algorithms present striking uncertainties regarding Chl-a concentrations – for example, overestimation in lower Chl-a concentrations or systematic overestimation in the northeastern Bering Sea and southern Chukchi Sea. Accordingly, a simple two band ratio (R_rs(443)/R_rs(555)) algorithm of Chl-a for the satellite ocean color data was devised for the northeastern Bering Sea and southern Chukchi Sea. The MODIS-derived Chl-a data from July 2002 to December 2014 were produced using the new Chl-a algorithm to investigate the seasonal and interannual variations of Chl-a in the northern Bering Sea and the southern Chukchi Sea. The seasonal distribution of Chl-a shows that the highest (spring bloom) Chl-a concentrations are in May and the lowest are in July in the overall area. Chl-a concentrations relatively decreased in June, particularly in the open ocean waters of the Bering Sea. The Chl-a concentrations start to increase again in August and become quite high in September. In October, Chl-a concentrations decreased in the western area of the Study area and the Alaskan coastal waters. Strong interannual variations are shown in Chl-a concentrations in all areas. There is a slightly increasing trend in Chl-a concentrations in the northern Bering Strait (SECS). This increasing trend may be related to recent increases in the extent and duration of open waters due to the early break up of sea ice and the late formation of sea ice in the Chukchi Sea.  相似文献   

Sedimentary Basin Analysis and Petroleum Potential of the Cretaceous Yuchon Group in Haenam Depression, SW Korea     

Son Jin - Dam 《东北亚地学研究》2000,(2)

IntroductionThe Haenam Depression filled with the LateCretaceous sediments and volcanics lies to the southwestern coast of Korea peninsula. The Cretaceousstrata (Yucheon Group) cover an area of ca. 200km2in the Haenam and Mokpo area. Regional geologicalsu…  相似文献   

Numerical investigation of the effect of seasonal variations of depthof-closure on shoreline evolution     

Xuan Tinh Nguyen  Minh Thanh Tran  Hitoshi Tanaka  Trung Viet Nguyen  Yuta Mitobe  Cong Dien Duong 《国际泥沙研究》2021,36(1):1-16

The current study presents the effects of seasonal variations in the depth-of-closure(Dc)on shoreline evolution using a numerical,one-line shoreline model.Beach erosion of the southern beach of the Nha Trang Coast,which is located in south central of Vietnam,is selected as the study area.This study area is immensely influenced by the tropical monsoon climate that has a clear pattern of large waves in the northeast monsoon season and calm waves in the non-monsoon season.The analysis of the long-term measured shoreline variations from a video-camera system has found a strong correlation of these variations to the monsoon-dominated wave characteristics in the Nha Trang Bay.Therefore,a new approach for determining the depth-of-closure with consideration of the seasonal wave climate changes is purposed in the current study.By implementing this new approach into a numerical,one-line shoreline model,it is found that the seasonal variations of Dc appear to better describe the periodical shoreline evolution due to the monsoon-dominated wave characteristics for the Nha Trang Coast.Such important findings are considered to commonly apply for monsoon-dominated coastal regions in general.These findings are useful information not only for scientific readers but also for the coastal authorities and managers in order to make better countermeasure plans against this kind of erosion mechanism in the future.  相似文献   

Pre-stack sea bottom detection and swell correction within an expected hyperbolic range for noisy high-resolution 8-channel airgun seismic data     

Lee  Ho-Young  Koo  Nam-Hyung  Kim  Byoung-Yeop  Kim  Young-Jun  Son  Woohyun  Joo  Yonghwan 《Marine Geophysical Researches》2021,42(1):1-22

Marine Geophysical Research - The Hugin Fracture, discovered in 2011, is an approximately 3.5&nbsp;km long seafloor fracture in the North Sea. This fracture was unexpected and, due to the...  相似文献