检索结果-南通市图书馆

On the siltation of the middle Yangtze River

Science china {1. sciences 2004年第5期47卷 463-480页

作者： yin hongfu1,{1., china university of geosciences, wuhan 430074, china 2. Hydrogeological Team, Hubei Bureau of Geology and Mineral Resources, Jingzhou 4341.0, china 3. Geological Survey of Jiangxi Province, nanchang 330201. china china Univ Geosci Sch Earth Sci Wuhan 430074 Peoples R China Hubei Bur Geol & Mineral Resources Hydrogeol Team Jinzhou 434100 Peoples R China Geol Survey Jiangxi Province Nanchang 3300201 Peoples R China

About 5.2×1.8 t/a of silts from the upper reach of the Yangtze River are transported through Yichang into the middle Yangtze River. The middle Yangtze itself and its tributaries yield ca. 0.8×1.8 t silts annually. Of this total 6×1.8 t/a input of silts, ca. 1.2×1.8 t/a are deposited within the river artery and lakes, while ca 4.83×1.8 t/a are at first transported into the lower reach through Datong, and then either deposited along the river and the Yangtze Delta, or output into the sea. Along the middle Yangtze River silting generally exceeds scouring, but the spatial and temporal distributions of scour-and-fill, as well as its distribution in the river valley transections, are uneven. Along the Yichang-chenglingji and Jiujiang-Datong Segments of the middle Yangtze, scouring exceeds or equals silting. Silting mainly occurs along the Luoshan-wuhan-Huangshi Segments with wuhan as the pivotal point, as well as in the Dongting and Poyang Lakes. Even in these silting-dominated areas, there are times and parts of segments that scouring prevails. As to the transections, generally the river channel of main stream is scouring-dominated, forming V-shaped sections to a depth of 2030 m or more, whereas the floodplains and bar islands are silting-dominated, forming wide and relatively high flats, which are often artificially transformed into protected embankments. Because the Jingjiang Levee separates the Jianghan Plain from Yangtze to the south, little has been deposited in that plain except a few sediments from the Han River—a tributary of the middle Yangtze. This factor plus the tectonic sag of that plain has made the altitude of plain surface several meters lower than that of the levee in most of the areas. Sil-tation along the Luoshan-wuhan-Huangshi Segments has resulted in the elevation of flood level in this and upstream segments. River channel scouring plus floodplain silting have caused the transections of the middle Yangtze valley typically with deep channel and height

关键词： the middle Yangtze, scour-and-fill, siltation, silt utilization.

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

青藏高原东南缘河谷堆积物的复杂性:以金沙江中游为例

引用

第四纪研究 2022年第3期42卷 797-808页

作者：尹功明魏传义王躲杜金花王莅斌程理袁仁茂王旭龙刘春茹中国地震局地质研究所地震动力学国家重点实验室北京100029 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室陕西西安710061 西安地球环境创新研究院陕西西安710061 长安大学地球科学与资源学院陕西西安710054 中国地震灾害防御中心北京100029

河流阶地是地表最常见的地貌之一,常被用作研究新构造、气候事件的材料之一。青藏高原东南缘山高坡陡,有多条强烈活动的大型断裂,是强震多发区,区内的河流往往流经高山峡谷。因此,河谷堆积物除正常河流相堆积外,还有多种其他成因。文章... 详细信息

河流阶地是地表最常见的地貌之一,常被用作研究新构造、气候事件的材料之一。青藏高原东南缘山高坡陡,有多条强烈活动的大型断裂,是强震多发区,区内的河流往往流经高山峡谷。因此,河谷堆积物除正常河流相堆积外,还有多种其他成因。文章以金沙江中游地区河谷堆积物为研究对象,根据沉积特征和测年结果,对其成因进行了探讨,发现有以下的非正常河流相堆积:1.由于河道宽窄相邻,可形成短期雍水湖,从而产生的沉积;2)高山峡谷或地震带附近的河道,因滑坡堵塞河道成堰塞湖,发育堰塞湖沉积;堰塞湖溃坝后,在下游也可产生溃决洪水堆积;3)河道两侧高大雪山冰川导致的冰水相堆积。因此,在高山峡谷地区根据阶地来研究新构造、气候事件时需要极其慎重。研究结果表明,洪水堆积物由于存在不充分曝光,其释光、电子自旋共振年龄会明显偏老、大于下伏正常的河流相样品年龄;金沙江中游涛源一带有高差达400 m、发育在不同高程的同期湖相层,应为同个堰塞湖沉积物;大洼村可见特大滑坡,滑坡体从左岸冲到右岸,滑坡坝拔河高在600 m以上、宽度在2~3 km之间,可以形成巨大的堰塞湖,涛源古湖可能与大洼滑坡相关。

关键词：金沙江阶地河谷堆积成因堰塞湖滑坡

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

Progress in the investigation of potash resources in western china

引用

china Geology 2018年第3期1卷 392-401页

作者： Mian-ping Zheng Xian-hua Hou Yong-sheng Zhang En-yuan Xing Hong-pu {1. Hong-wei yin chang-qing Yu ning-jun Wang Xiao-{1.n Deng Zhao wei Zhong-ying Miao Jia-ai Zhong Fan Wang Fu Fan Xue-fei Zhang Xu-ben Wang Tu-qiang {1.u wei-gang Kong MnR Key Laboratory of Saline Lake Resources and Environments Institute of Mineral ResourcesCAGSBeijing 100037China Qaidam Integrated Geological Exploration Institute of Qinghai Province Golmud 816000China school of {1. sciences and Engineering Nanjing UniversityNanjing 210093China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Dazhou Heng cheng Energy (Group) CO. LTD. Dazhou 635000China Institute of Geology of china Chemical Geology and Mine Bureau Zhuozhou 072754China chengdu {1. of Technology Chengdu 610059China Sichuan Geological Survey Chengdu 610081China

Through the study of the geological conditions of potash deposits in china from recent years,a new understanding of potash theories has arisen that appropriate Chinese geological *** progress and substantial breakthroughs have been gained in the direction and management of potash prospecting: (1. Important breakthroughs in continental potassium prospecting:The "Quaternary gravel type deep potassium rich brine metallogenic model in western Qaidam" ensures Quaternary deep potassium rich brine prospecting will grow new KCl resources by 350 Mt,providing a resource guarantee for meeting the Chinese demand for sylvite.(2) The Marine facies potash prospecting shows good prospects: the determination of the new type of Triassic polyha{1.te potash ore deposits in Sichuan provide an important scientific basis for the estab{1.shment of exploration planning and the selection of exploration target areas for polyha{1.te minerals in the Sichuan Basin;The "two-storey potash deposits model" in southwestern Yunnan has been confirmed,which indicates prospects for the exploration of potash in the deeper Marine facies in southwestern Yunnan are {1.kely to be *** discovery of a high concentration of rich bromite salt and potash salt in the Paleogene of the Kuqa depression and the southwestern Tarim region provides strong support for the {1.ke{1.hood large-scale potash deposits exist in these regions.

关键词： Potash deposits theory Potash basin Resource quantity Potassium bearing brine of sandy gravel bed in Qaidam

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

Sub-percent precision measurement of neutrino oscillation parameters with JUnO

引用

Chinese Physics C 2022年第12期46卷 28-49页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram Abid Aleem Fengpeng An Qi An Giuseppe Andronico nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste weidong Bai nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Antonio Bergnoli Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Jose Busto Ilya Butorov Anatael Cabrera Barbara Caccianiga Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Riccardo Callegari Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Chi Chan Jinfan chang Yun chang Guoming chen Pingping chen Po-An chen Shaomin chen Xurong chen Yixue chen Yu chen Zhiyuan chen Zikang chen Jie cheng Yaping cheng Yu Chin cheng Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Flavio Dal Corso Olivia Dalager Christophe De La Taille Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng Dong Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Donghua Fan Lei Fan Jian Fang Wenxing Fang Marco Fargetta Dmitry Fedoseev Zhengyong Fei li-cheng Feng Qichun Feng Richard Ford Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Alexandre Göttel Marco Grassi Vasily Gromov Minghao Gu Xiaofei Gu Yu Gu Mengyun Guan Yuduo Guan nunzio Guardone Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yang Han Miao He wei He Tobias Heinz Patrick Hellmuth Yuekun Heng Rafael Herrera YuenKeung Ho Yerevan Physics Institute YerevanArmenia Universiélibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing Institute of Spacecraft Environment Engineering BeijingChina Beijing normal university BeijingChina china Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina north china Electric Power {1. BeijingChina school of Physics Peking UniversityBeijingChina Tsinghua university BeijingChina university of Chinese Academy of {1. BeijingChina Jilin {1. ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing university ChongqingChina Dongguan university of Technology DongguanChina Jinan university GuangzhouChina Sun Yat-Sen university GuangzhouChina Harbin Institute of Technology HarbinChina university of Science and Technology of{1. HefeiChina The Radiochemistry and nuclear Chemistry Group in university of South{1. HengyangChina Wuyi university JiangmenChina Shandong university JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina nanjing university NanjingChina Guangxi university NanningChina East china {1. of Science and Technology ShanghaiChina school of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina nankai university TianjinChina wuhan {1. WuhanChina Xi'an Jiaotong university Xi'anChina Xiamen university XiamenChina school of Physics and Microelectronics Zhengzhou UniversityZhengzhou

JUnO is a multi-purpose neutrino observatory under construction in the south of *** publication presents new sensitivity estimates for the measurement of the △m_(31.^(2),△m_(21.^(2),sin^(2)θ_(1.),and sin^(2)θ_(1.) oscillation parameters using reactor antineutrinos,which is one of the primary physics goals of the *** sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site,the nuclear reactors in the surrounding area and beyond,the detector response uncertainties,and the reactor antineutrino spectral shape constraints expected from the TAO satellite *** is found that the △m_(21.^(2) and sin^(2)θ_(1.) oscillation parameters will be determined to 0.5%precision or better in six years of data *** the same period,the △m_(31.^(2) parameter will be determined to about 0.2%precision for each mass ordering *** new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.

关键词： neutrino oscillation reactor antineutrino precision measurement JUnO

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

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

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：