基于开源PostgreSQL & SharpMap的高放废物地质处置遥感信息管理系统的设计与开发     

王洪斌  黄树桃  王鹏  罗鹏程 《铀矿地质》2016,(2):123-127

基于开源PostgreSQL空间数据库和SharpMap控件,设计开发了高放废物地质处置遥感信息管理系统,实现了遥感影像的打开、另存、裁剪、空间查询、可视化漫游及数据记录的增、删、改、查等多种功能,对高放废物地质处置及信息化建设具有重要的现实意义。  相似文献   

古地下水测年法在高放废物地质处置中的应用     

周志超  云龙  王驹 《铀矿地质》2014,(1):57-64

文章论述了古地下水测年法的原理、适用范围及其在高放废物地质处置中的应用,分析对比了各种测年方法的优缺点,旨在为高放废物地质处置库选址中的水文地质研究提供参考。  相似文献   

某核废物处置预选区中核素迁移模拟研究     

李寻  ;杨泽平  ;李金轩  ;张卫民  ;李小燕 《华东地质学院学报》2014,(3):321-327

核素在裂隙介质中的迁移问题是核废物深地质处置中极为关注的问题。为了解裂隙介质中核素的迁移规律,建立了基于双重介质理论的描述核素在裂隙域和基质域中迁移的基本微分方程,利用拉普拉斯变换推导出其解析解;在对西北某核废物处置场预选区地水文地质条件分析的基础上,获取相关参数,利用一维多途径核素迁移模型,选取国内在花岗岩中研究较多的核素Cs-134、Co-57、Tc-99,模拟这几种核素的相对浓度随模拟时间、迁移距离的变化规律。模拟结果表明：在其他条件都相同的情况下,Cs-134的迁移是最快的,而Tc-99迁移是最慢的。  相似文献   

非饱和膨润土的有效热传导特性模型     

周嵩  陈益峰  张勤 《岩土力学》2014,35(4):1041-1048

膨润土缓冲材料热传导特性的研究,对于高放废物深地质处置系统的安全评价至关重要。基于串、并联原理,通过将土体孔隙划分为与固相基质并联和串联两部分,提出了考虑矿物成分、颗粒亲水性、孔隙率及饱和度等因素的非饱和膨润土有效热传导系数的4种预测形式,建立了基于4种形式线性组合的有效热传导特性预测模型。详细讨论了模型参数的确定方法,并讨论了孔隙率、饱和度和孔隙结构、颗粒亲水性等因素对土体有效热传导特性的影响。基于MX-80膨润土和高庙子膨润土热传导特性试验成果,对模型的预测性能进行了验证。结果表明,由于膨润土颗粒尺寸较小且具有亲水特性,孔隙内的空气与水宜采用并联描述。研究成果对于非饱和膨润土的导热性能以及工程屏障系统的THM耦合数值模拟研究具有一定的参考价值。  相似文献   

Enteroviruses in mussels and marine sediments and depuration of naturally accumulated viruses by green lipped mussels (Perna canaliculus)     

Gillian Lewis  Margaret W. Loutit  Frank J. Austin 《新西兰海洋与淡水研究杂志》2013,47(3):431-437

Surveys were carried out over 16 months to assess the distribution of enteroviruses of human origin in sediments and mussels near two sewage outfalls on the North Taranaki Coast, New Zealand. Enteroviruses were present in high numbers in both sediments and shellfish near the New Plymouth sewage outfall with maximum virus levels of 32 000 pfu 100 g^‐1 of wet mussel tissue and 59 pfu 100 g^‐1 of wet sediment material. Viruses were recovered occasionally from sediments and mussels near the Waitara Borough outfall. Coxsackievirus B4 was the predominant virus type isolated but CB5 and Poliovirus types 1, 2, and 3 were also recovered. Attempts to depurate virus‐contaminated New Plymouth mussels, by keeping them in water for 8 days with daily water replacement, did not achieve a significant reduction in virus numbers.  相似文献   

Ingestion and assimilation efficiency of Aeshna brevistyla and Hemicordulia australiae larvae (Odonata)     

R. A. Prestidge 《新西兰海洋与淡水研究杂志》2013,47(1):193-199

In a laboratory study of the ingestion and assimilation efficiency of larvae of Aeshna brevistyla Rambur and Hemicordulia australiae Rambur, ingestion was determined using Cerenkov radiation techniques and assimilation efficiency by a double‐labelled isotope technique. Of each prey item (Daphnia carinata), 30% was not ingested but lost as body fluids and as material within the alimentary canal of the prey. Assimilation efficiency was greater than 70% for both dragonfly species, which appears to be typical for most other invertebrate predators. The efficiency with which 12th‐15th‐instar Aeshna assimilated ¹⁴C did not increase with feeding rate, but Hemicordulia increased its efficiency through instars 12–14. When dragonfly larvae were pre‐fed before experimentation, assimilation efficiency decreased in both species.  相似文献   

Confounding response of macrofauna from a confluence of impacts: brine and sewage pollution     

Rodrigo Rier  Fernando Tuy  Myriam Rodr&#;guez  &#;scar Monterroso  Eva Ramos 《海洋学报(英文版)》2013,32(10):74-81

Throughout the shores of the world,a confluence of different sources of pollution is common,e.g.,through outlets releasing brine,industrial,and domestic sewage.In this study,we assessed whether a combined disposal of domestic sewage and brine altered the patterns of abundance and assemblage structure of subtidal macrofauna inhabiting sandy seabeds on the south coast of Gran Canaria(Canary Islands,NE Atlantic Ocean).Samples were collected in two surveys(May 2008 and January 2009)at three distances(0,15,and30 m)away from the discharge point.Macrofaunal abundances showed different patterns with varying proximity from the disposal point in the two surveys.In May 2008,lower abundances were observed at0 m(53.89±46.82 ind.)than at 15 m(120±91.7 ind.)and 30 m(283.89±189.33 ind.)away from the disposal point.In January 2009,however,higher abundances were observed at 0 m(131.33±58.69 ind.)than at 30 m(100±24.44 ind.)and 15 m(84.78±58.39 ind.)away from the disposal point.Significant differences in macrofaunal assemblage structure were found with varying proximity from the discharge point in both surveys.The effect of proximity from the disposal point was confounded by changes in sedimentary composition between surveys,which contributed to explain differences in macrofaunal abundances and assemblage structure with varying proximity from the discharge point.As a result,confounding drivers of macrofaunal assemblage structure,here,changes in sediment composition,accounted for changes in macrofaunal abundances and assemblage structure with varying proximity from a combined disposal point of brine and sewage.  相似文献   

吉林省白城市地下水污染现状和治理对策     

侯伟  郭纯青  孙志忠 《吉林地质》2010,29(2):112-116

研究区隔污层为厚1m的亚砂土,隔污性能差,污水、垃圾无固定放置场所,且以明渠排放。根据污染程度确定了轻度污染区2600km2、中度污染区510km2、重度污染区663km2,提出了建立暗管排污系统的治理对策。  相似文献   

关于地下实验室分类的讨论     

徐国庆 《国外铀金地质》2010,(3):170-177

论述了现有的地下实验室的分类,对普通地下实验室与特定场址地下实验室的主要特征进行了对比分析,论述了各国地下实验室的研究概况,对特定场址地下实验室的概念进行了讨论。鉴于在现行的地下实验室分类中,对特定场址地下实验室的定义似乎界定过宽,因为有些该类型的地下实验室,缺乏明确的历史定位,最终没有起到特定场址地下实验室应起的作用。笔者建议,只有建在经本国政府批准的最终处置库场址上的地下实验室,才可称作为特定场址地下实验室,如美国的WIPP和ESF以及芬兰的ONKALO。因为只有这类地下实验室,才能真正起到论证处置库场址适宜性和高放废物处置方案可行性的作用。  相似文献   

鲁北平原一多年排污河渠对两侧浅层地下水水质的影响分析     

刘中业  杨丽芝  张涛  刘春华 《地下水》2010,32(4):47-50

为了阐明平原区排污河渠对地下水水质的影响程度和影响范围,以鲁北平原一条未采取防渗措施的多年排污河渠为例,进行了河渠污水对两侧浅层地下水污染机理的研究。通过Mg^2＋、Cl^-、1,2-二氯乙烷等主要污染指标在排污河渠两侧的扩散规律研究,初步确定排污河渠对两侧浅层地下水综合质量的影响范围约为100 m。此结论为平原区浅层地下水的防污、治污提供了一定的参考依据。  相似文献