提高供水井开发质量的技术措施     

吕泽 《黑龙江国土资源》2007,(8):60-61

水井的成井质量主要有3个指标：单井可能提供的出水量；提供的水质；水井有效服务寿命。[第一段]  相似文献   

Mountain Water Tower and Ecological Risk Estimation of the Mesta-Nestos Transboundary River Basin （Bulgaria-Greece）   总被引：2，自引：1，他引：1  

K. Grunewald J. Scheithauer J.-M. Monger N. Nikolova 《山地科学学报》2007,4(3):209-220

The Mesta-Nestos river basin in Bulgaria and Greece is a case study for transboundary decision-making support in south-eastern Europe and a show-case for the development of methodologies and information-gathering for the integrated regional planning of water resources. Land-use conflicts in this water-scarce region cover a wide spectrum of activities like agricultural irrigation,drinking water production,diversions for industrial water,and risk of pollution from mining,to name a few examples. Measurements of the water quality were carried out in the upper basin. Results will be illustrated by the example of the environmental situation in the alpine region of the Pirin National Park as well as in the Razlog Basin with a stronger anthropogenic impact and pollution around a former uranium mine near the village of Ele?nica. The social and economic development of this transboundary region is a recently established priority for the future. It will mean an increase in water usage and more stress for the water resources if regional impacts of global climate change are verified. Problem-focused management of the catchment area as a whole on the basis of proved geo-data sets is needed for the future.  相似文献   

温度和体重对花尾胡椒鲷幼鱼最大摄食量的影响     

王瑁  丘书院 《台湾海峡》2000,19(4):484-488

研究了花尾胡椒鲷幼鱼的最大摄食量与温度和体重的关系。花尾胡椒鲷幼鱼的最大摄食量与体重呈正相关 ,二者的关系为 :Cmax=1 5 95 .3W0 .6 87(Cmax:最大摄食量 ,J/d ;W :体重 ,g)。最大摄食量随温度的变化情况为 :在实验温度为 2 2～ 2 8℃范围内 ,二者呈正相关 ,超过 2 8℃之后呈负相关。最大摄食率与体重的相关关系为 :Rmax=1 5 0 7.6W-0 .313[(Rmax:最大摄食率 ,J/(d·g) ]。采用回归分析 ,建立了由温度和体重预测该种鱼的最大摄食量和最大摄食率的模型 :Cmax=2 86 790e-0 .90 4ln(T3-77.738T2 1985 .185T -16 42 9.710 ) W0 .6 16 　n =1 6 ,r =0 .994Rmax=0 .887e1.2 6 4ln(-T3 78.0 6 1T2 -2 0 0 3.397T 172 36 .5 2 0 ) W-0 .2 83　n =1 6 ,r=0 .978  相似文献   

利比里亚宝米铁矿阶段性勘查工作圆满完成     

张庆  江雪岩 《河南国土资源》2014,(6)

正5月底,河南地矿局第二地质矿产调查院承担的香港宝豫有限公司"利比里亚宝米东部山区铁矿勘查"项目阶段性勘查工作已经圆满完成。2013年8月30日,宝豫利比里亚公司与该院在郑州签署了《利比里亚共和国宝米东部山区铁矿勘查合同》。其主要内容是完成利比里亚共和国巴布罗州宝米东部山区铁矿探矿权(探矿权证号:MEL12005)区内43.26平方公里的铁矿普查,并在其中优选的10平方公里进行详查。合同签订以后,经过一个多月的紧张筹备,该院从2013年10月开始陆续派人到达矿区,11月初全部人员  相似文献   

2012年罗源湾海域环境质量现状评价与分析     

任保卫 《海洋与海岸带开发》2014,(4):95-99

文章根据2012年8月对福建罗源湾海域的环境质量调查结果,结合海洋功能区划对海洋环境质量现状进行了评价与分析,并综合分析了海水中富营养化程度,沉积物中重金属的富集程度与生态风险效应。结果表明:该海域水质中除活性磷酸盐、无机氮和石油类存在超标外,其他环境因子均符合功能区划要求的海水水质标准。沉积物中除滴滴涕外,其他因子均符合海洋沉积物标准。20%的站位富营养化指数大于1,该海区的富营养化程度较低。沉积物中铅的富集程度相对较大,沉积物重金属的潜在生态危害轻微。  相似文献   

2014中国(天津)国际海洋水文气象监测技术及仪器设备展示交易会将于5月在天津滨海新区会展中心举行     

吕日恒 《海洋信息》2014,(1):55-55

正由中国高科技产业化研究会海洋分会和中国海洋学会科技开发与产业化工作委员会共同策划的"2014中国(天津)国际海洋水文气象监测技术及仪器设备展示交易会"将于2014年5月23—25日在天津滨海新区会展中心举办。交易会将为我国海洋科技领域提供更为有利、有效和便捷的技术服务。凡从事海洋水文气象仪器生产商、贸易商、代理商、服务商及相关海洋技术专业的企事业、机关职能管理等单位均可参与技术交流和合作。会议展示内容涉及4个方面:1)海洋水文气象监测系统及仪器设备、水文气象海洋传感器技术、数据采集技术、数据传输技术、系统软件应用技术、水质自动监测、野  相似文献   

基于主成分-聚类分析法的沙埕港海域水质状况评价          下载免费PDF全文

王臻 《海洋开发与管理》2014,31(7):105-108

通过对2012年沙埕港海域水质调查数据的主成分分析,并利用聚类法,对12个调查站位进行分类。根据分析结果对水质状况进行评价。结果显示沙埕港水质污染情况总体是从湾中部往湾顶和湾口逐渐加重。中部区域主要污染因子为无机污染物,湾顶和湾口的主要污染因子为油类和重金属。主成分-聚类分析较为客观地反映了实际情况,可较好地应用于海洋环境评价。  相似文献   

自组织数据地图在大辽河河口水质分析中的应用     

张小伟  刘乐军  马安青  张震 《中国海洋大学学报(自然科学版)》2014,44(7):95-99

自组织数据地图(SOM,Self-organizing Map)具有强大的数据压缩和提炼功能,应用它可以对水质监测数据进行处理,找到水质分析的新方法。本文以大辽河河口水质监测数据为例,应用MATLAB中SOM工具箱,采用批处理SOM算法,利用MATLAB语言编写出水质分析程序。该程序通过SOM的训练对数据特征进行分析和显示,并进一步分析SOM训练结果,将监测数据分成4类,最后实现数据跟踪及新的监测数据的自动归类。该方法可以将水质监测数据的特征可视化,便于直观、深入地分析水质状况,为识别水质特征、跟踪水质变化和应对措施提供决策支持。  相似文献   

Assessing seawater quality with a variable fuzzy recognition model     

柯丽娜  王权明  盖美  周惠成 《中国海洋湖沼学报》2014,32(3):645-655

With the rapid development of the marine economy industry, human exploitation of marine resources is increasing, which is contributing to the growing trend of eutrophication and frequent occurrence of red tide. Accordingly, investigations of seawater quality have attracted a great deal of attention. This study was conducted to construct a seawater environmental quality assessment model based on the variable fuzzy recognition model. The uncertainty and ambiguity of the seawater quality assessment were then considered, combining the monitoring values of evaluation indicators with the standard values of seawater quality. Laizhou Bay was subsequently selected for a case study. In this study, the correct variable model for different parameters was obtained according to the linear and nonlinear features of evaluation objects. Application of the variable fuzzy recognition model for Laizhou Bay, water quality evaluation and comparison with performance obtained using other approaches revealed that the generated model is more reliable than traditional methods, can more reasonably determine the water quality of various samples, and is more suitable for evaluation of a multi-index, multi-level, nonlinear marine environment system; accordingly, the generated model will be an effective tool for seawater quality evaluation.  相似文献   

Zooplankton community structure in relation to environmental factors and ecological assessment of water quality in the Harbin Section of the Songhua River     

李晓钰  于洪贤  马成学 《中国海洋湖沼学报》2014,32(6):1344-1351

To study the relationship between zooplankton community structure and environmental factors and water quality in the Harbin Section of the Songhua River, investigations were carried out in June, August, and October 2011. Canonical correspondence analysis （CCA） and saprobic indices were used to process and analyze the data. Seasonal variability was identified as a significant source of variation, which explains the fluctuation in zooplankton density. In autumn, the dry season, water residence time increased and zooplankton biomass and abundance accumulated in the slow flowing waters. Zooplankton abundance increased when food conditions improved. Therefore, the total zooplankton abundance in autumn is much higher than that in spring and summer. According to the saprobic indices, all the sample sites had mesosaprobic water and water quality was worse in autumn. CCA revealed that temperature accounted for most of the spatial variation in the zooplankton community. Moreover, pH, dissolved oxygen saturation, and turbidity were important factors affecting zooplankton community distribution.  相似文献