检索结果-南通市图书馆

Morphological Change in the Northern Red River Delta,Vietnam

Journal of Ocean University of China 2018年第6期17卷 1272-1280页

作者： BUI Vuong Van FAN Daidu NGUYEN Dac Ve tran dinh lan tran Duc Thanh HOANG Van Long NGUYEN Thi Hong Hanh Institute of Marine Environment and Resources Vietnam Academy of Science and TechnologyHaiphong 18000Vietnam State Key Laboratory of Marine Geology Tongji UniversityShanghai 200092China Hanoi University of Mining and Geology Hanoi 10000Vietnam Graduate University of Science and Technology Vietnam Academy of Science and TechnologyHanoi 10000Vietnam

Coastal erosion has become a worldwide concern, typically in the densely populated Asian mega-river deltas. Severe coastal erosion in the southern Red River Delta(RRD) has been intensively studied. Coastal morphological change in the northern RRD was examined in detail through DEM(Digital Elevation Model) analysis based on time series of bathymetrical maps(1965–2004) and landsat images(1975–2015) in this study. The results show that the northern RRD is featured by rapid coastal accretion in the past few decades, although suspended sediment flux has dropped by roughly 60% after the completeness of Hoa Binh Dam(HBD) in 1988 and relative sea level rose at 1.9 mm yr^(-1). However, accretion at the outer part of subtidal shoals and platforms was observed to slow down quickly or even turned into erosion in the last two decades. The resuspended sediments from the erosion zone can be transported landward to replenish the inner coastal zone, keeping the latter accretion in the near future to compensate for the sediment discharge decrease from the river. However, this lag effect should be terminated soon if other adverse effects go worse, e.g., damming rivers, sea-level rising, strengthening storms, land reclamation and other poor-designed coastal engineering. Coastal planners and managers should pay full attention to these changes.

关键词： Morphological change DEM coastal erosion coastal engineering coastal management tide-dominated Red River Delta

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Introduction to the China-Vietnam Cooperation Project: A Comparative Study of the Holocene Sedimentary Evolution of the Yangtze and Red River Deltas

引用

Journal of Ocean University of China 2018年第6期17卷 1269-1271页

作者： YIN Ping PHUNG Van Phach tran dinh lan DO Huy Cuong BUI Van Vuong DUAN Xiaoyong Key Laboratory of Marine Environmental Geology Ministry of Natural Resources Qingdao Institute of Marine Geology Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology Institute of Marine Geology and Geophysics Vietnam Academy of Science and Technology Institute of Marine Environment and Resources Vietnam Academy of Science and Technology

Both China and Vietnam confront the challenges of natural geohazards and environmental changes in their deltas and coastal zones due to rapid urbanization, economic development, and the impacts of global climate change. China and Vietnam initiated a comparative study of the Holocene sedimentary evolution of the Yangtze River Delta(YRD) and Red River Delta(RRD) for the period 2015–2018 in order to improve the understanding of the two delta evolution histories in the Holocene. Previous investigative data of the two rivers, onshore delta plains, and offshore subaqueous deltas have been explored and reinterpreted. New data gleaned from boreholes, piston cores, shallow seismic and hydrodynamic sources have been collected from the offshore YRD and the East China Sea inner shelf, and surface sediments and short cores have been collected from the RRD near-shore areas. Six focal areas of the joint project have been defined for comparative studies of the two deltas, including morphological development, sequential stratigraphy, coastline shifting, sedimentary characteristics, sedimentary dynamics, and correlation with anthropogenic global climate change. The results of these study areas are presented herein. The joint project also includes cooperative capacity building; exchanges of young scientists have been organized during the project period, and hands-on training in laboratory geochemical analysis, numerical modeling, and seismic data processing and interpretation have been provided by China and its Vietnamese geoscientist partners. Joint field excursions were organized to the upstream of the Yangtze and Red Rivers in Yunan Province, China, all the way downstream along the Vietnamese portion of the Red River. These joint studies have, over the past three years, improved understanding of the evolutionary history of these two major rivers and their mechanisms of source to sink. Joint project results of these two major deltas are not limited to the geosciences; the cooperativ

关键词： Yangtze River Delta Red River Delta Holocene sedimentary environment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assesment of Frequency-Magnitude of Extreme Rainfall Events-Case Study of the MeKong River Delta

引用

Journal of Environmental Science and Engineering(B) 2015年第3期4卷 161-168页

作者： Pham Hai An tran Anh Tu tran dinh lan Nguyen Ngoc Tien Institute of Marine Environment and Resources VAST Haiphong 180000 Vietnam Institute of Marine Geology and Geophysics VAST Hainoi 1000000 Vietnam

Extreme rainfall events are primary natural hazards, which cause a severe threat to people and their properties in populated cities, which are normally located in coastal areas in Vietnam. Analysing these events by using a data series observed over years will support us to draw a picture of how the climate change impact on local environments. The purpose of this report is to understand the characteristics of the extreme rainfall events in MEKONG river delta （south VietNam）. Daily rainfall data in the period of 30 years for a meteorological station in each area were collected from the Vietnam National Hydro-meteorological Service. The extreme rainfall events were defined as those exceeding the 95th percentile for each station. The analytical results show that the rainfall values （95th percentile） are 37.4 mm/day at Nam Can station, 27 mm/day at My Thanh station, 22.4 mm/day at Hoa Binh station, 23.8 mm/day at Binh Dai station and 22.7 mm/day at Ben Trai station. The highest rainfall data ever recorded are 246.4 mm/day （Nam Can）, 174.5 mm/day （My Thanh）, 179 mm/day （Hoa Bin_h）, 187.3 mm/day （Binh Dai） and 136.3 mm/day （Ben Trai） during 1983-2012. The result of the Mann-Kendall tests show that there was a significant creasing of the rainfall at Nam Can, My Thanh station in two periods （1983-2012, 1998-2012） while no clear trend of the rainfall was recoreded at Hoa Birth, Binh Dai, Ben Trai station. In order to estimate the return period of the extreme rainfall events, the method General Extreme Value Distribution was used to calculate frequent distribution. The magnitudes of daily maximum rainfall were from 2 to 100 years. The results of return period show that maximum rainfalls are 46.6 mm at Nam Can station （highest） and 31.4 mm at Hoa Birth station （lowest） during 50 years. Similarly, maximum rainfalls are expected to be about 55.1 mm at Nam Can station and 37.2 mm at Hoa Birth station for 100 years.

关键词： Generalized extreme value distribution MEKONG river delta.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Investigation on cost-effective composites for CO_(2) adsorption from post-gasification residue and metal organic framework

引用

Journal of Environmental Sciences 2025年第2期148卷 174-187页

作者： Hong Nam Nguyen Thu Phuong Nguyen Phuong Thu Le Quang Minh tran Thi Hai Do Trung Dung Nguyen Phuong lan tran-Nguyen Toshiki Tsubota Thi Mai Thanh dinh University of Science and Technology of Hanoi Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoi 100000Vietnam Institute for Tropical Technology Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoi 100000Vietnam Faculty of Basic Science Hanoi University of Mining and Geology18 Pho VienDuc ThangNam Tu LiemHanoi 100000Vietnam Faculty of Physical and Chemical Engineering Le Quy Don Technical University236 Hoang Quoc VietBac Tu LiemHanoi 100000Vietnam Department of Mechanical Engineering Can Tho University3/2 streetCan Tho City 94000Vietnam Department of Engineering Graduate School of EngineeringKyushu Institute of Technology1-1 SensuichoTobata-kuKitakyushuFukuoka 804-8550Japan

Cost-effective CO_(2) adsorbents are gaining increasing attention as viable solutions for mitigating climate *** this study,composites were synthesized by electrochemically combining the post-gasification residue of Macadamia nut shell with copper benzene-1,3,5-tricarboxylate(CuBTC).Among the different composites synthesized,the ratio of 1:1 between biochar and CuBTC(B 1:1)demonstrated the highest CO_(2) adsorption *** controlled laboratory conditions(0°C,1 bar,without the influence of ambient moisture or CO_(2) diffusion limitations),B 1:1 achieved a CO_(2) adsorption capacity of 9.8 mmol/g,while under industrial-like conditions(25℃,1 bar,taking into account the impact of ambient moisture and CO_(2) diffusion limitations within a bed of adsorbent),it reached 6.2 mmol/*** values surpassed those reported for various advanced CO_(2) adsorbents investigated in previous *** superior performance of the B 1:1 composite can be attributed to the optimization of the number of active sites,porosity,and the preservation of the full physical and chemical surface properties of both ***,the composite exhibited a notable CO_(2)/N_(2) selectivity and improved stability under moisture *** favorable characteristics make B 1:1 a promising candidate for industrial applications.

关键词： Biochar-based composites CO_(2)adsorption CuBTC Metal organic framework Post-gasification residue

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Characteristics of Suspended Particulate Matter and the Coastal Turbidity Maximum Areas of the Mekong River

引用

Journal of Environmental Science and Engineering(A) 2015年第2期4卷 67-78页

作者： Vu Duy Vinh tran Anh Tu tran dinh lan Nguyen Ngoc Tien Institute of Marine Environment and Resources Vietnam Academy of Science and Technology Haiphong 35999 Vietnam Institute of Marine Geology and Geophysics Vietnam Academy of Science and Technology Hanoi 10999 Vietnam

This paper presents the results of application of a 3D （three-dimensional） numerical model to study on MTZ （maximum turbidity zone） in the coastal zone of Mekong River Delta. In this study, a 3D system model with combination of hydrodynamics--wave and suspended sediment transport was set up and validated with measured data in the study area. Based on calculated scenarios for the flood and the dry season, the results have shown appearance of MTZs in the coastal zone of Mekong River with suspended sediment concentration prevalent of 0.04-0.07 kg·m^3 （the dry season） and 0.05-0.1kg·m^3 （the flood season）. The position and MTZs scale change with the interaction between fresh water and tidal oscillations. The MTZ occur more in the dry seasons compared to the wet season. The MTZs are prevalent located far away from estuaries about in 12-22 km （in the dry season）, and 5-15 km in the flood season.

关键词： Modelling maximum turbidity zone suspended sediment transport Me Kong river coastal area.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Environmental Assessment of Coastal Sand Mining Using Proposed DPSIR Criteria:A Case of Hai Phong

引用

Sustainable Marine Structures 2023年第1期5卷 14-23页

作者： Do Thi Thu Huong Do Gia Khanh Nguyen Van Thao tran dinh lan Institute of Marine Environment and Resources Vietnam Academy of Science and TechnologyHai Phong180000Vietnam Hai Phong Department of Agriculture and Rural Development Hai Phong180000Vietnam Graduate University of Science and Technology Vietnam Academy of Science and TechnologyHanoi100000Vietnam

The environmental impact of coastal sand mining activities in Hai Phong city was assessed using ten proposed sustainable criteria for socio-economic development,and ecological and environmental *** ten criteria were developed by the analysis of the Dynamics-Pressure-State-Impact-Response(DPSIR)framework,including one driver and pressure criterion(D and P),seven status and impact criteria(S and I),and two response criteria(R).Each criterion is quantified according to five specific evaluation criteria corresponding to the evaluation score from 1 to *** results of the ten criterion application for environmental impact assessment of coastal mining Hai Phong by weighting show that the areas with economic activities,benthic biodiversity,and coastal ecosystems are most negatively impacted(score 4/5 and 3.5/5).Other subjects suffer low to moderate impacts(score 1/5 to 3/5).The environmental impact of sand mining(2015-2020)is generally moderate(score ranging from 2/5 to 3/5).The set of adjusted criteria can be applied to similar activities in coastal provinces and cities in Vietnam.

关键词： Coastal area Marine ecosystems Environmental impact Vietnam

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Zoning Marine Disposal for Dredged Material Management:A Case Study in Vietnam

引用

Sustainable Marine Structures 2019年第2期1卷 19-27页

作者： Do Gia Khanh Do Thi Thu Huong Vu Duy Vinh tran dinh lan Hai Phong Department of Science and Technology Institute of Marine Environment and Resources/VAST Graduate University of Science and Technology

The fast growth of Hai Phong ports in the two last decades requires not only their upgrading facilities but also expanding port area and dredging their shipping channels(existing and new ones)that generate a huge amount of unused dredged *** all existing dumping sites in sea waters and on land get over capacity,looking for new dumping sites in sea waters is an urgent *** study is to zone coastal waters of Hai Phong for suitable dumping sites meeting sustainable coastal ***-criteria overlay analysis on GIS platform was employed with the criteria of natural conditions,environment and socio-economics for zoning coastal waters of Hai *** criteria were detailed into eight subcriteria and then developed to eight GIS weighted thematic sub-layers of bottom depth,litho-hydrodynamics,ecosystems,distribution of benthos,distance to residential areas and tourist sites,distance to aquaculture area,distance to ecosystems and distance to conservation *** results show the highly suitable zone for dredged material dumping in South,South West Hai Phong at depth below 15m to the deeper *** of dredged materials in the zone would minimize impacts on the environment,ecology and socio-economics in surrounding waters and coastal areas.

关键词： MCOA Marine dumping Shipping channel Sustainable criteria Environmental impacts Hai Phong ports

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatic eosinophilic pseudotumor due to Fasciola hepatica infection mimicking intrahepatic cholangiocarcinoma: A case report

引用

World Journal of Hepatology 2025年第1期17卷 158-166页

作者： Kim-Long Le Minh-Quang tran Tri-Nhan Pham Nhu Ngoc-Quynh Duong Thien Thuan dinh Nguyen-Khoi Le Department of Surgery Pham Ngoc Thach University of MedicineHo Chi Minh 07000Viet Nam Department of Hepato-Pancreato-Biliary Nhan Dan Gia Dinh HospitalHo Chi Minh 07000Viet Nam Department of Surgery District 4 HospitalHo Chi Minh 07000Viet Nam

BACKGROUND Hepatic eosinophilic pseudotumor(HEPT)is a rare condition that mimics ma-lignant hepatic tumors,posing significant diagnostic *** case report highlights the importance of considering parasitic infections like Fasciola hepatica(***)in the differential diagnosis of hepatic masses,especially in endemic regions,to prevent unnecessary *** SUMMARY A 40-year-old female presented with a 1-month history of epigastric pain and significant weight *** revealed a hepatic mass,initially misdiagnosed as intrahepatic *** results showed marked eosinophilia,and histopathological examination confirmed significant eosinophilic infiltration without *** testing identified *** *** patient was treated with a single dose of triclabendazole,leading to complete symptom resolution and normalization of hepatic imaging findings within *** HEPT due to *** can closely mimic malignancy;timely antiparasitic treat-ment is crucial for resolution.

关键词： Hepatic eosinophilic pseudotumor Eosinophilic liver infiltration Eosinophilia Fascioliasis Fasciola hepatica Eosinophilic pseudotumor Parasitic infection Hepatic abscess Triclabendazole Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Determination of Helmert transformation parameters for continuous GNSS networks:a case study of the Géoazur GNSS network

引用

Geo-Spatial Information Science 2023年第1期26卷 125-138页

作者： dinh Trong tran Jean-Mathieu Nocquet Ngoc Dung Luong dinh Huy Nguyen Department of Geodesy and Geomatics Engineering Hanoi University of Civil EngineeringHanoiVietnam UniversitéCôte d’Azur CNRSObservatoire de la Côte d’AzurIRDValbonneFrance

In this paper,we propose an approach to determine seven parameters of the Helmert transfor-mation by transforming the coordinates of a continuous GNSS network from the World Geodetic System 1984(WGS84)to the International Terrestrial Reference *** includes(1)convert-ing the coordinates of common points from the global coordinate system to the local coordinate system,(2)identifying and eliminating outliers by the Dikin estimator,and(3)estimating seven parameters of the Helmert transformation by least squares(LS)estimation with the“clean”data(*** removed).Herein,the local coordinate system provides a platform to separate points’horizontal and vertical ***,the Dikin estimator identifies and eliminates outliers in the horizontal or vertical component *** is significant because common points in a continuous GNSS network may contain *** proposed approach is tested with the Géoazur GNSS network with the results showing that the Dikin estimator detects outliers at 6 out of 18 common points,among which three points are found with outliers in the vertical compo-nent ***,instead of eliminating all coordinate components of these six common points,we only eliminate all coordinate components of three common points and only the vertical component of another three common ***,the classical LS estimation is applied to“clean”data to estimate seven parameters of the Helmert transformation with a significant accuracy *** Dikin estimator’s results are compared to those of other robust estimators of Huber and Theil-Sen,which shows that the Dikin estimator performs ***,the weighted total least-squares estimation is implemented to assess the accuracy of the LS estimation with the same *** inter-comparison of the seven estimated parameters and their standard deviations shows a small difference at a few per million levels(E-6).

关键词： Continuous GNSS tectonic geodesy Dikin estimation Helmert transformation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BTEX pollution caused by motorcycles in the megacity of HoChiMinh

引用

Journal of Environmental Sciences 2013年第2期25卷 348-356页

作者： tran Thi Ngoc lan Pham Anh Minh University of Science Vietnam National University227 Nguyen Van CuHoChiMinh 70000Vietnam

Monitoring of benzene, toluene and xylenes （BTEX） was conducted along with traffic counts at 17 roadside sites in urban areas of HoChiMinh. Toluene was the most abundant substance, followed by p,m-xylenes, benzene, o-xylene and ethylbenzene. The maximum observed hour-average benzene concentration was 254 μg/m3 . Motorcycles contributed to 91% of the traffic fleet. High correlations among BTEX species, between BTEX concentrations and the volume of on-road motorcycles, and between inter-species ratios in air and in gasoline indicate the motorcycle-exhaust origin of BTEX species. Daily concentrations of benzene, toluene, ethylbenzene, p,m-xylenes and o-xylene were 56, 121, 21, 64 and 23 μg/m 3 , respectively. p,m-xylenes possess the highest ozone formation potential among the BTEX family.

关键词： air pollution benzene BTEX HoChiMinh motorcycle exhaust

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：