深厚黄土地基浸水湿陷变形及竖向土压力作用分析

黄土地基浸水后的湿陷变形对黄土地区的工程建设具有重大影响,但以往研究对深厚黄土地基土浸水过程的湿陷特性及其土压力变化规律研究不够充分。以中兰铁路兰州新区南站某场地为例,开展现场浸水试验,对深厚湿陷性黄土场地的地表位移及地基深层湿陷变形进行监测,同时埋设土压力盒,对浸水湿陷过程中地基土的竖向土压力的变化规律进行分析。研究...     

Short- and long-term response of phytoplankton to ENSO in Prydz Bay,Antarctica: Evidences from field measurements,remote sensing data and stratigraphic biomarker records

The study provides one of the first lines of evidence showing linkages between Antarctic phytoplankton abundance and composition in response to ENSO, based on historical reconstruction of sediment biomarkers. In addition to sediment biomarkers, field measured and remote sensing data of phytoplankton abundance were also recorded from Prydz Bay, Eastern Antarctica. Com-munity structure of field measured phytoplankton showed significant El Ni？o/La Ni？a-related succession during 1990 to 2002. In general, the number of algae species decreased during El Ni？o and La Ni？a years compared to normal years. Austral summer monthly variation of remotely sensed chlorophyll-a （Chl-a）, particulate organic carbon （POC）, and sea surface temperature （SST） indicated that ENSO impacted the timing of phytoplankton blooms during 2007 to 2011. Phytoplankton blooms （indicated by Chl-a and POC） preceded the increases in SST during El Ni？o years, and lagged behind the SST increases during La Ni？a years. Stratigraphic record of marine sedimentary lipid （brassicasterol, dinosterol and alkenones） biomarkers inferred that the proportions of different algae （diatoms, dinoflagellates and haptophytes） changed significantly between El Ni？o and La Ni？a events. The relative proportion of diatoms increased, with that of dinoflagellates being decreased during El Ni？o years, while it was reversed during La Ni？a years.     

全省国土资源信息化建设现场会在温州召开

为进一步推进全省国土资源信息化建设工作,省国土资源厅2004年3月12日在温州召开全省国土资源信息化建设现场会。张国斌副厅长、张志勋副巡视员出席会议并讲话。省厅信息中心负责人、各市国土资源局分管局长、信息中心主任参加会议。会议听取了一年来各市局信息化建设工作汇报;回顾总结了2013年全省信息化工作,研究部署了2014年工作任务;重点研究讨论了如何进一步推进国土资源信息化建设“六网”行动和国土资源“一张图”建设。会议期间,与会代表还观看考察了温州市国土资源局“一张图”建设的现场演示。     

冬夜查盗采

正2014年1月的一个深夜,正值数九寒天,两辆印有"国土资源,执法监察"字样的面包车在蜿蜒曲折的博晋路上快速行进,车上的人员顾不上害怕盘山公路边的悬崖峭壁,个个摩拳擦掌——一连两次出师不利,大伙儿心里都有一股说不出的憋屈。"今晚一定要抓住他们,太狡猾了,这么冷的天,我们都跑两趟了,居然都没有逮住,     

能人老张

正"丁零零……"值班室电话铃声急促地响了起来。原来,村民举报楚村有人正在破坏耕地。放下电话,老张带着我和小孙第一时间赶到了现场。一见我们到来,当事人徐某有些心虚,慌忙给老张递上烟,陪着笑脸说道:"这是我家的荒地,想在这里取些土,没想到被你们逮了。你放心,我立即停止施工。"老张走到取土的地方仔细察看后,一眼就识破了徐某的鬼心眼儿,这徐某不是想取土,而是盯上了地下的铝土矿。老张来了个将计就计,先让我和小孙用GPS现场测点上图,根据图斑确认该地块为基本农田。之后,老张手举着GPS扫了一下躺倒在地的禾苗,把徐某叫到了身边说:"你     

获嘉县马厂煤详查项目日前正式启动

正近日,由河南省煤田地质局三队承担的获嘉县马厂煤详查项目正式启动。截至目前,共有15台钻机进入现场施工。为保证质量,该队组织人员及时搜集分析地质资料,开展前期野外踏勘,编制设计书。该项目工作周期一年。据了解,该项目为河南省国土资源厅下达的2013年度省地质勘查基金(周转金)续作(合作勘查)项目,设计钻孔79个,总工     

图片报道

正①为更好地服务航空港经济综合实验区的建设,7月25日,厅直属机关党委组织厅机关全体人员和厅属各单位领导班子成员到郑州航空港经济综合实验区参观学习。(行海燕摄影报道)②7月24日,河南省地质环境监测院举行"我为单位做贡献"演讲比赛。图为比赛现场。(陈军摄影报道)③项城市张营村的村民代表来到周口市国土资源局,对该局实施的土地整理项目给村里带来的实惠表示由衷的感谢。图为村民代表将写有"情注基层办实事,路线教育见实效"的锦旗送到工作人员手中。(李殿彬卢真珍摄影报道)     

宝丰局严厉打击非法采石

正7月24日,宝丰县国土资源局组织土地执法队、资源稽查队及李庄国土资源所等单位,在李庄乡人民政府的大力支持下,对位于李庄乡祁家村南的一处非法采石场进行了突击检查,现场查扣了采石设备。当天行动共出动执法车辆5辆、执法人员30余人,有力打击了非法采石行为,消除了安全隐患。近期,李庄国土资源所执法人员在巡查中发现有非法采石现象。盗采分子采取休息日及夜间作业的方式,在非法采石的时间上与执法人员打时间差,加大了执法人员的执法难度。针对这种情况,李庄国土资源所改变执法模式,采取不定期巡查和分片管理等方式打击非法开采。     

基于卫星高度计的北极海冰厚度变化研究

A modified algorithm taking into account the first year(FY) and multiyear(MY) ice densities is used to derive a sea ice thickness from freeboard measurements acquired by satellite altimetry ICESat(2003–2008). Estimates agree with various independent in situ measurements within 0.21 m. Both the fall and winter campaigns see a dramatic extent retreat of thicker MY ice that survives at least one summer melting season. There were strong seasonal and interannual variabilities with regard to the mean thickness. Seasonal increases of 0.53 m for FY the ice and 0.29 m for the MY ice between the autumn and the winter ICESat campaigns, roughly 4–5 month separation, were found. Interannually, the significant MY ice thickness declines over the consecutive four ICESat winter campaigns(2005–2008) leads to a pronounced thickness drop of 0.8 m in MY sea ice zones. No clear trend was identified from the averaged thickness of thinner, FY ice that emerges in autumn and winter and melts in summer. Uncertainty estimates for our calculated thickness, caused by the standard deviations of multiple input parameters including freeboard, ice density, snow density, snow depth, show large errors more than 0.5 m in thicker MY ice zones and relatively small standard deviations under 0.5 m elsewhere. Moreover, a sensitivity analysis is implemented to determine the separate impact on the thickness estimate in the dependence of an individual input variable as mentioned above. The results show systematic bias of the estimated ice thickness appears to be mainly caused by the variations of freeboard as well as the ice density whereas the snow density and depth brings about relatively insignificant errors.     

长江口北支异常强盐水入侵观测与分析

长江口北支由于径流分流比很小,盐水入侵较强,特别是枯季大潮期盐水甚至倒灌进入南支,影响上海市和江苏省的水源地水质。为了进一步研究北支盐水入侵的规律及影响因素,2014年1月1-9日在北支进行了大小潮同步水文观测。本次观测到了北支异常强盐水入侵:小潮期发生强盐水入侵,且强度大于大潮期。小潮期强盐水入侵导致中下游河段被高浓度盐水控制,盐度从下游B01到中游B02几乎没有变化,且盐度的涨落潮变化几乎消失。分析认为,小潮观测期间长江入河口流量较小、河口潮差不是太小,加上强偏北风,三者的叠加是导致强盐水入侵的主要原因。