Influence of contaminated Vistula River water on the groundwater entering the Zakrzówek limestone quarry, Cracow region, Poland   总被引：1，自引：0，他引：1  

J. Motyka  A. Postawa 《Environmental Geology》2000,39(3-4):398-404

 Chemical composition of water inflows in the Zakrzówek quarry, developed in fractured and karstified Upper Jurassic limestones, is controlled by infiltration of polluted water from the Vistula River and by infiltrating meteoric water. The river water TDS value is 2.5 g/dm³. The quarry waters have 0.6–2.0 g/dm³ TDS. Highly mineralised waters belong to Cl-Na type. With decreasing TDS the percentage of sulphates, calcium, magnesium and hydrocarbonates increases. This seems to result from various processes including dilution of polluted river water, leaching of aquifer rocks, and ion exchange. The transfer time of river water to the quarry is about 100–120 days. Concentration of contaminants contained in the river water declines during the migration through limestones to the quarry. Received: 7 March 1997 · Accepted: 7 December 1998  相似文献   

Cross-Media Models of the Chesapeake Bay Watershed and Airshed   总被引：1，自引：0，他引：1  

Linker  Lewis C.  Shenk  Gary W.  Dennis  Robin L.  Sweeney  Jeffery S. 《Water Quality and Ecosystems Modeling》2000,1(1-4):91-122

A continuous, deterministic watershed model of the Chesapeake Bay watershed, linked to an atmospheric deposition model is used to examine nutrient loads to the Chesapeake Bay under different management scenarios. The Hydrologic Simulation Program - Fortran, Version 11 simulation code is used at an hourly time-step for ten years of simulation in the watershed. The Regional Acid Deposition Model simulates management options in reducing atmospheric deposition of nitrogen. Nutrient loads are summed over daily periods and used for loading a simulation of the Chesapeake estuary employing the Chesapeake Bay Estuary Model Package. Averaged over the ten-year simulation, loads are compared for scenarios under 1985 conditions, forecasted conditions in the year 2000, and estimated conditions under a limit of technology scenario. Limit of technology loads are a 50%, 64%, and 42% reduction from the 1985 loads in total nitrogen, total phosphorus, and total suspended solids, respectively. Urban loads, which include point source, on-site wastewater disposal systems, combined sewer overflows, and nonpoint source loads have the highest flux of nutrient loads to the Chesapeake, followed by crop land uses.on assignment from NOAA Air Resources Laboratory  相似文献   

硫铁矿焙烧灰渣中铊分布规律及环境效应的研究   总被引：6，自引：0，他引：6  

谢文彪  陈永亨  陈穗玲  毕雪贞  范小苑 《矿物岩石地球化学通报》2000,19(3):204-206

利用分光光度法测定了铊在硫铁矿焙烧灰、渣中的含量,探讨了含铊硫铁矿燃烧后铊在灰渣中的集散规律及其对环境影响。结果显示硫铁矿焙烧灰渣中铊含量远高于克拉克值和土壤背景值;与原矿石相比,铊在炉灰中富集,炉渣中含量减少。硫铁矿燃烧产生的含铊灰渣对环境危害增大。  相似文献   

浑河沈阳城区段污染总量控制研究     

潘俊  周立冬  高艳艳 《吉林大学学报(地球科学版)》2007,37(2):331-334

排污总量控制是确定河道的纳污能力,然后向流域内分配允许排放量的过程。选用一维水质模型进行水环境状况的模拟,对浑河沈阳城区段水环境容量进行计算,在此基础上按功能区内各排污口及支流口所占污染负荷比进行了主要污染物控制排放量及削减量分配。  相似文献   

成都经济区土壤磁化率特征及其环境意义   总被引：6，自引：0，他引：6  

张艳彬  王玉  杨忠芳  陈岳龙 《吉林大学学报(地球科学版)》2007,37(3):597-604

通过对54个根系土和14条土壤剖面土磁参数与化学组成的分析测试、以及根系土相对应的水稻籽实样品化学分析结果,较系统地总结了成都经济区土壤磁化率特征。结果表明：①土壤磁化率在数值上主要受成土母质控制;②在根系土壤样品中,根系土磁化率比其下层土壤磁化率有不同程度的增加;③不同类型土壤的磁化率均与土壤中Cd含量呈正相关,并对土壤污染程度有较好的指示性;④利用磁化率可以对土壤进行初步分类。  相似文献   

Heavy Metal Contents in Soft-Bottom Marine Macrophytes and Sediments Along the Mediterranean Coast of Spain     

Carles Sanchiz  Antonio M. García-Carrascosa  & Augustin Pastor 《Marine Ecology》2000,21(1):1-16

Abstract. Hg, Cd, Pb and Zn concentrations were determined in sediment and in tissues of five species of soft-bottom marine macrophytes ( Posidonia oceanica, Cymodocea nodosa, Zostera noltii, Ruppia cirrhosa and Caulerpa prolifera ) along the Spanish Mediterranean coast. Levels of metals were low in most of the sampling stations and similar to those found by other authors in uncontaminated zones. Certain locations, however, showed some degree of contamination (Cambrils, Almassora, Alacant, Mar Menor and El Portús). In Santa Pola we found high contents of metals in one sample of sediment due to the high proportion of the fine fraction (particules < 63µm) and organic matter, but not in the seagrass species. Mercury and zinc concentrations in the sediment are correlated to those in at least some anatomic fractions of Posidonia oceanica, Cymodocea nodosa and Caulerpa prolifera , suggesting that these species reflect the levels of these metals in the environment. Lead contents in the alga Caulerpa prolifera are also correlated to those in the sediment, while no significant correlations were obtained for cadmium. Among the species studied, Posidonia oceanica and Cymodocea nodosa seem to be better biomonitors than Caulerpa prolifera .  相似文献   

胶州湾的环境演变及可持续利用   总被引：21，自引：0，他引：21  

印萍  路应贤 《海岸工程》2000,19(3):14-22

分析了近50a来胶州湾水域形态和水质污染的演变情况及其原因;提出了胶州湾环境与资源可持续性利用的战略对策。  相似文献   

河北黄骅近岸石油污染对海洋生物体内石油烃含量的影响     

崔毅  陈碧鹃  宋云利  吴彰宽 《海洋科学进展》2000,18(3):66-71

对河北黄骅沿海1995年2次调查所捕获的鱼、虾、贝类等18种样品的测定结果表明,受测海洋生物均检出石油烃,双壳类生物体内石油烃含量高于甲壳类和鱼类.该海域海洋生物体内石油烃含量水平远低于国内外污染严重的水域.从分析结果看,该海域目前石油污染特点主要以慢性油污染为主.  相似文献   

水井酸处理的周期性负压法   总被引：1，自引：0，他引：1  

韩乾坤  靳孟贵  常振松 《地球科学》2002,27(2):189-192

针对常规水井酸处理法增产效果有限、对地下水污染严重的问题, 提出了水井酸处理的周期性负压法.该方法通过产生周期性负压, 不断向裂隙中压入井筒里活性较强的酸液, 并及时清除裂隙中的反应产物, 因而使用一次周期性负压法, 具有多次常规酸处理加物理洗井的增产效果; 同时它利用周期性负压和少量多次注酸, 限制水井酸处理的污染范围, 降低对地下水的污染程度.使用结果表明: 与常规水井酸处理法相比, 水井酸处理的周期性负压法可使水井酸处理效果平均提高186%, 酸处理后的污水排出量减少59%.另外, 该方法简便易用, 使用成本低, 可广泛推广应用.   相似文献   

我国河流湖泊污染的防治技术及发展趋势   总被引：17，自引：0，他引：17  

董晓丹  周琪  周晓东 《地质与资源》2004,13(1):26-29

我国河流湖泊污染现状为V类和劣V类水质占七大水系(辽河、海河、淮河、黄河、松花江、珠江、长江)主要断面的50%以上,高中营养化湖泊占被调查湖泊的85%以上,河流湖泊污染状况十分严峻.目前河流湖泊采取的污染防治技术措施主要有:削减截流污染源、完善城市排水系统和建设污水处理厂、河流低泥疏浚、河道曝气技术、生物修复技术、水生植被恢复工程、引清冲淡等等.生物生态技术将在河流湖泊污染防治及生态恢复中发挥重要的作用.  相似文献