EH4电磁成像系统在莱州湾地区探测海水入侵界限的调查研究     

苏永军  黄忠峰  匡海阳  张国利  刘宏伟  梁建刚  高学生 《华北地质》2014,(4)

利用EH4电磁成像系统在莱州湾地区探测了海水入侵界限,结果表明,EH4电磁成像视电阻率反演断面图不仅能反映地下咸淡水水体层位垂向的厚度变化、横向上延伸情况,建立各层位的相互关系,还可以反映层位的埋深及起伏形态,而且根据该断面图勾划出来的咸淡水分界线与水文地质调查结果基本吻合,说明这种方法在该地区有效而可行。EH4电磁成像系统对探测海水入侵具有简单,快速等特点,应用前景很好,值得推广。  相似文献   

Application of remote sensing technology in emergency rescue decision about “6·17” Danba River debris flow disaster chain     

TANG Yao  WANG Lijuan  ZHAO Juan  ZHANG Chengxin 《中国地质调查》2014,7(5):114-122

On June 17, 2020, a mudslide occurred in Meilongou of Banshanmen Town, Danba County of Sichuan Province, which blocked Xiaojinchuan River and formed a barrier lake, causing heavy property losses and casualties. In order to grasp the first-hand disaster situation and assist emergency rescue and other disposals, combined with the UAV aerial photography data and post-disaster site survey and other data, the authors used the domestic high-score 2 satellite data as the main data source to carry out the emergency investigation and analytical research of emergency rescue decision about “6.17” Danba River debris flow disaster chain. The results show that the affected population is about 65,000 and the nearest emergency rescue teams are from State Grid Danba County Power Supply Company and China Unicom of Xiaojin Country. Five schools, such as Banshanmen middle school, could be used as temporary resettlement shelters. There are six mining enterprises, one important reservoir and one hydropower station affected by the disaster. The debris flow gully is NE—SE distributed, covering about 142,700 m². And the barrier lake is about 1.03 km², covering 498,000 m². The totally destroyed roadbed and road surface were about 2.1 km and there are 9 suspected disaster hidden dangers in the lower reach. Whats more, 25 residential houses and 5 bridges were damaged by the disaster. Two rescue lifelines with good post-disaster accessibility to the severely affected debris flow areas were chosen. With the help of remote sensing technology, the in-depth analysis of the pre-judgment of the affected population by the debris flow disaster chain, emergency investigation of the disaster situation and disaster damage, and the selection of emergency rescue lifelines were successfully conducted, which has great guiding significance in the emergency rescue and disaster prevention and mitigation in the mountainous areas of Southwest China with similar geological conditions.  相似文献   

Aeolian component records in lacustrine sediments and its atmospheric circulation significance for evolution of Qarhan salt lake,NE Qinghai-Tibetan Plateau     

AN Fuyuan  LAI Zhongping  FAN Qishun  WEI Haichen  MA Haizhou 《《地质学报》英文版》2014,88(Z1):1-2

正1 Introduction The Qarhan Playa of Qaidam Basin is located at the northeastern QinghaiTibetan Plateau(QTP),in which thick lacustrine and evaporate sediments deposited since the late Pleistocene(Chen et al.,1985,1986).As surrounded by capacious Gobi and yardang fields and suffered strong westerly-northwesterly wind,abundant aeolian materials were trapped in these sediment sequences in the  相似文献   

Geochemical signal of seasonality in annually laminated organic- carbonate sediments in Shira lake(Khakasia)     

Ivan KALUGIN  Andrey DARIN  Denis ROGOZIN  Gennady TRET’YAKOV 《《地质学报》英文版》2014,88(Z1):12-13

正1 Introduction The most valuable for the task of climate reconstruction are the time series with an annual resolution,which allows to reveal natural periodicity and pass to the search for mechanisms of regional and global climatic changes.Bottom sediments of lakes are one of the best climate archives in addition to tree ring series,ice cores etc.  相似文献   

Progress and Prospects of Salt Lake Research in China     

ZHENG Mianping  SONG Pengsheng  KONG Weigang 《《地质学报》英文版》2014,88(Z1):441-442

正1 Introduction Salt lakes in China distributes in the east part of the salt lake belt of Northern Hemisphere,and they originated under complex morphological and geological background.The QT Plateau and its northern areas belong to active tectonic zone and stable tectonic zone respectively.With elevation varies from more than 5000 m to the lowest of-  相似文献   

Preliminary measurements of boundary layer reactive halogens based on MAXDOAS technique over Salt Lake in West China     

LUO Yuhan  SI Fuqi  DOU Ke  ZHOU Haijin  XIE Pinhua 《《地质学报》英文版》2014,88(Z1):229-230

正The reactive halogens play key roles in the destruction of boundary layer ozone by catalytic reactions and provide a fast pathway to the sedimentation of elemental gaseous mercury.The presence of bromine oxides in the lower  相似文献   

Development and Utilization of Saline Lake Resources and Protection of Ecological Environment in Qaidam Basin in Qinghai Province   总被引：1，自引：0，他引：1  

MENG Wei  SHU Jianmin  YANG Rongjin  LI Yanwu 《《地质学报》英文版》2014,88(Z1):191-193

正Qaidam basin is an important part of National Key Development Area–Lanzhou-Xining Area,is a key region of resource development in Western Development,is a National Circular Economy Pilot Zone.The focus of  相似文献   

Evolution of Quaternary Depositional Environments in Lop Nor,Xinjiang:Sedimentary Records from LDK01 Drilling     

Lü Fenglin  LIU Chenglin  JIAO Pengcheng  ZHAO Yanjun 《《地质学报》英文版》2014,88(Z1):227-228

正Lop Nur is located in the interior of Asian and the lowest part in the eastern Tarim Basin.It is the final destination of major river systems in Tarim Basin and the accumulation center of salt materials(Xia,1987).As  相似文献   

Cryptophyta Flagellates of Meromictic Lakes Shira and Shunet(Khakassia,Russia):Mechanisms of Vertical Distribution and Trophic Role     

Yuri BARKHATOV  Elena KHROMECHEK  Alexander TOLOMEEV  Igor PROKOPKIN 《《地质学报》英文版》2014,88(Z1):50-52

正1 Introduction Many of the stratified lakes are characterized by the presence of large populations of cryptomonads in their chemocline zones(Reynolds,1992;Gervais et al,2003;Pedro's-Alio'et al.,1995).These populations are adapted to low light intensity and high sulfide concentration;they have a mixotrophic ability and form the so-called"deep chlorophyll maxima"(Gervais,1998;Marsha"and Laybourn-Parry,2002).A similar Cryptomonas sp.  相似文献   

磨刀门水道咸潮上溯动力特性分析   总被引：1，自引：0，他引：1       下载免费PDF全文

陈文龙  邹华志  董延军 《水科学进展》2014,25(5):713-723

为研究磨刀门水道咸潮上溯的动力特性,基于非结构网格海洋模型（Finite Volume Coastal Ocean Model,FVCOM）,构建了覆盖珠江河口及其上游网河区的高分辨率三维斜压数值模型,采用实测资料对其进行率定和验证,并开展了咸潮上溯的数值模拟计算。根据计算结果和实测资料,对磨刀门水道大、中、小潮期间的盐淡水分层与混合特征、盐分物质的分层输移机制进行分析,探讨其咸潮上溯强度时空分布差异的原因。结果表明:小潮期,底层累积盐通量明显大于表层,净输移方向为陆向;大潮期,表层累积盐通量明显大于底层,净输移方向为海向;而平衡点一般出现于中潮期,这就是磨刀门水道咸潮上溯最强和最弱时刻分别出现于小潮和大潮后的中潮期的原因所在。  相似文献