微处理机、数据采集、图形显示仪器及其应用学术交流会

1983年9月4日至8日中国地球物理学会仪器及观测系统专业委员会和中国仪器仪表学会地质仪器学会在北京联合召开了首次微处理机、数据采集、图形显示仪器及其应用学术交流会,参加会议的有来自全国各有关61个单位125名代表。     

发展技术,增强基础-地球物理仪器国际化与地球物理技术在工程上的应用研讨会综述

2004年,中国地球物理学会仪器专业委员会在北京召开了“地球物理仪器国际化问题”(4月)和“地球物理技术在工程上的应用”(8月)两个研讨会。会议发表了大量论文,展示了目前我国先进的地球物理仪器和地球物理技术在工程方面的应用成就．承《地球物理学进展》编辑部支持,决定在2004年第四期和2005年第一期,连续刊载经专家审查和推荐的地球物理仪器和技术方面的部分优秀论文,     

电法仪器学术交流会

中国地球物理学会仪器和观测系统专业委员会与中国仪器仪表学会地质仪器学会,于1983年7月4日至9日在苏州联合召开了电法仪器学术交流会。参加会议的有来自全国各系统48个单位的代表共76人。     

CPS／SEG2004年国际地球物理会议暨展览在京举行

2004年3月31日至4月3日，中国石油学会(CPS)和美国勘探物理学家协会(SEG)联合主办的2004年第六届国际地球物理会议暨展览在北京国际会议中心举行．SEG年会是全球地球物理界的顶级专业学术会议．每两年召开一次小范围的会议，每4年召开一次大会．会议主要交流、展示各国在地球物理方面的新技术、新方法和新设备、新仪器．本次会议共有国内外地球物理方面的专家、代表1200余名参加．会议共设立了5个分会场和软件、仪器展区，同时举办了由全球各大石油公司总裁参加的高峰论坛．     

中国地球物理学会仪器和观测系统1984年学术讨论会简况

中国地球物理学会仪器和观测系统专业委员会1984年学术讨论会于11月21日至25日在长沙举行。全国65个单位的107名代表参加了会议,其中大部分来自科研、教学、生产第一线,年轻人占了相当的比例,这是这次会议的特点之一。会议采用大会报告和专业组分组报告相结合的形式,共宣读论文44篇。包括重力、磁法、电法、测井、放射性以及振动技术等方面的内容。代表们回顾了三年来我国地球物理仪器的进展,广泛交流了情报,研究了国内外动态。一致认为,我国地球物理仪器的发展已取得     

1986年振动测试仪器与观测处理技术讨论会

1986年振动测试仪器与观测处理技术讨论会于1986年9月15日至18日在北京举行,出席会议的有全国有关的33个单位58名代表,中国地球物理学会仪器与观测系统专业委员会主任秦馨菱主持了会议,学会理事长顾功叙出席了会议并作了重要的讲话。     

中国地球物理学会第15届年会在合肥召开

1999年 1 0月 2 0～ 2 4日中国地球物理学会第 1 5届年会在安徽省合肥市隆重召开。来自地质矿产部、中国气象局、中国科学院、中国地震局、石油天然气总公司和水利、国土资源、有关高等院校等部门的专家、教授、学者共 393人参加了会议。本届年会主题是面向 2 1世纪的中国地球物理。大会开幕式由中国科学院院士陈禺页主持 ,中国科学院院士、中国地球物理学会理事长刘光鼎致开幕词 ,并作了“2 1世纪中国地球物理的研究”的报告。德国地球物理研究中心鲍曼教授作了“研究中心在德国地球物理研究中的作用”的报告 ,美国纽约州立大学黄庭芳教授…     

振动技术学术讨论会

中国地球物理学会振动技术学术讨论会于1983年3月22日至25日在北京举行。十五个单位三十多名代表参加了会议,中国地球物理学会仪器和观测系统专业委员会主任秦馨菱、副主任王敬耀出席了会议并讲了话。这次会议不仅介绍了最近的研究成果和国内外动态;而且采取了较灵活的方式,用较多的时间集中讨论了振动技术中几个重要的问题,探讨得较为深透,取得了很好的效果。 会议就以下几个方面进行了交流并展开了热烈的讨论:     

我国1981年度仪器设备专业学术会议简讯三则

1981年11月18—21日,中国地球物理学会仪器和观测系统专业委员会在北京召开了首次学术讨论会。会议由专业委员会副主任委员王敬耀主持。学会常务理事、专业委员会主任委员秦馨菱致开幕词,学会理事长顾功叙、副理事长朱岗昆等出席了会议,顾老并在开幕式上讲了话。他指出观测工作是地球物理学的基础,要尽快改变我国地球物理观测仪器的落后状态;观测仪器要创新、并要加强基础理论的研究;他勉励从事这方面工作的同志努力克服困难,知难而进;要选题正确,并贵在坚持。     

中国地球物理学会测振技术经验交流会简讯

中国地球物理学会勘探地球物理专业委员会于1985年12月3日至5日在保定市召开了“测振技术经验交流会”。参加会议的有勘察、设计、科研及大专院校的20多个单位近50名代表。会议收到24篇论文。除了在大会宣读论文外,还就有关技术问题进行了热烈的讨论。     

Changes in sediment transport in the Kuye River in the Loess Plateau in China

In this paper, the changes in sediment transport over 51 years from 1955 to 2006 in the Kuye River in the Loess Plateau in China are assessed. Key factors affecting sediment yield and sediment transport, such as precipitation depth, discharge, and human activities are studied. To investigate the changes in sediment yield in this watershed, a trend analysis on sediment concentration, precipitation depth, and discharge is conducted. Precipitation depths at 2 Climate Stations （CSs）, as well as discharge and sediment transport at 3 Gauging Stations （GSs） are used to assess the features of sediment transport in the Kuye River. The rtmoff modulus （defined as the annual average discharge per unit area, L/（s·km^2）） and the sediment transport modulus （defined as the annual suspended sediment transport per unit area, t/（yr km^2）） are introduced in this study to assess the changes in runoff and sediment yield for this watershed. The results show that the highest average monthly discharge during the study period in the Kuye River is 66.23 m^3/s in August with an average monthly sediment concentration of 88.9 kg/m^3. However, the highest average monthly sediment concentration during the study period in the Kuye River is 125.34 kg/m^3 and occurs in July, which has an average discharge of 42.6 m^3/s that is much less than the average monthly discharge in August. It is found that both the runoff modulus and sediment transport modulus at Wenjiachuan GS on the Kuye River has a clear downward trend. During the summer season from July to August, the sediment transport modulus at Wenjiachuan GS is much higher than those at Toudaoguai and Longmen GSs on the Yellow River. The easily erodible loess in the Kuye River watershed and the sparse vegetation are responsible for the extremely high sediment yield from the Kuye River watershed. The analyses of the grain size distribution of suspended load in the Kuye River are presented. The average monthly median grain size of suspended load in the Kuye River is largest in February and then decreases until June. In July, the average monthly median grain size of suspended load approaches another peak and decreases until September. Then, the median grain size of suspended load starts to increase until February of the following year. However, the average monthly median grain size of suspended load in the Yellow River at Toudaoguai and Longmen GSs is the smallest between early summer and late fall The median grain size in the Yellow River starts to increase in November and approaches the largest size in January.     

TritiogenicHe in groundwater in Takaoka

³He/⁴He ratios up to 3.5 times the ratio of atmospheric He were found in groundwater samples. The³He enrichment can be attributed to radiogenic³He produced by in-situ beta-decay of³H. This shows that tritiogenic³He is accumulating in confined waters. From tritiogenic³He and³H concentrations, ages of groundwaters can be calculated. Detection of tritiogenic³He gives a tool to trace a tritium contamination which occurred in the past and cannot be assessed only by the³H counting method.     

Variations in trace gas concentrations in different environments in India

Observations of trace gases (SO₂, NH₃, NO₂ and O₃) were made during the period 1981 to 1984 at 6 different locations representative of urban industrial, urban, nonurban, thermal power plant and marine environment. Diurnal variations of the trace gases were studied in an urban environment. Except in the urban industrial environment, the concentration of NH₃ was found in the range of background values. Also, the average concentrations of NO₂ and O₃ at the different environments were in the order of background values. However, the concentrations of SO₂ were substantially higher by about 7 times, in urban industrial and thermal power plant environments. The diurnal variations of SO₂, NH₃ and NO₂ showed anitphase relationship with surface temperature at the urban environment station which is relatively free of industrial pollution. Discussion is centred on trace gas variations in different environments in India together with the values reported for various countries in the world.     

Projected changes in flood indices in selected catchments in Poland in the 21st century

The aim of this study is to estimate likely changes in flood indices under a future climate and to assess the uncertainty in these estimates for selected catchments in Poland. Precipitation and temperature time series from climate simulations from the EURO-CORDEX initiative for the periods 1971–2000, 2021–2050 and 2071–2100 following the RCP4.5 and RCP8.5 emission scenarios have been used to produce hydrological simulations based on the HBV hydrological model. As the climate model outputs for Poland are highly biased, post processing in the form of bias correction was first performed so that the climate time series could be applied in hydrological simulations at a catchment-scale. The results indicate that bias correction significantly improves flow simulations and estimated flood indices based on comparisons with simulations from observed climate data for the control period. The estimated changes in the mean annual flood and in flood quantiles under a future climate indicate a large spread in the estimates both within and between the catchments. An ANOVA analysis was used to assess the relative contributions of the 2 emission scenarios, the 7 climate models and the 4 bias correction methods to the total spread in the projected changes in extreme river flow indices for each catchment. The analysis indicates that the differences between climate models generally make the largest contribution to the spread in the ensemble of the three factors considered. The results for bias corrected data show small differences between the four bias correction methods considered, and, in contrast with the results for uncorrected simulations, project increases in flood indices for most catchments under a future climate.     

Copper in natural waters in Transbaikalia

Cu concentrations in surface (river and lake) and subsurface waters are determined. The geographic pattern of Cu distribution in natural water is identified. This pattern is controlled by the difference between its concentrations in drained rocks and soils and the geochemical redox conditions of its migration. Territories with low, medium, and elevated Cu concentrations in natural waters are identified. The concentrations of Cu in natural waters of the region are found to be generally lower than the Clarke values.     

Changes in thermal extremes in Poland

Changes in thermal extremes of the climate of Poland in 1951–2010 are examined. Warm extremes have become more frequent, while cold extremes have become less frequent. In the warming climate of Poland, the increase in the number of extremely warm days in a year and the decrease in the number of extremely cold days in a year have been observed. Also the increase of the maximum number of consecutive hot days in a year and the decrease of the maximum number of consecutive very cold and extremely cold days in a year have been observed. However, the trends are not of ubiquitous statistic significance, as the natural variability is strong.     

Hydrological changes in the Ganges system in Bangladesh in the post-Farakka period

Abstract

The basin area of the Ganges River in Bangladesh is extremely dependent on a regular water supply from upstream to meet requirements for agriculture, fisheries, navigation, salinity control, and domestic and industrial sectors. In 1975, India commissioned a barrage on the Ganges River at Farakka to divert a significant portion of the dry season flow in order to make the Calcutta Port navigable. Statistical analyses of discharge and water level data have been carried out to determine if significant changes have occurred in the hydrology of the Ganges system in Bangladesh in the post-Farakka period. Siltation of the Gorai River (an offtake of the Ganges River) has also been examined using the stage-discharge relationship and regression analysis. The analyses show that the diversion has caused considerable hydrological changes in the Ganges system in Bangladesh. The water supply in the dry season has been reduced substantially, while siltation of the Gorai River has increased significantly.     

Advances in ground motion studies in China

This paper briefly summarizes the works in the processing of strong ground motion data, the factors affecting strong ground motion, the modeling of strong ground motion and the calculating of broad-band response spectrum which have been done recent years by engineering seismologists and seismologists of China. In addition, we think back to the international cooperation in strong ground motion of the recent years and make some expectations for the future.