基于GIS构建的西安市地下水污染防治方法研究     

任唯敏 《地下水》2011,(6):57-59

以西安市地下水污染防治GIS系统的构建设想为例,根据GIS软件平台的要求采用基于转换器的数据融合,将所搜集到的不同格式的空间数据通过统一的交换格式转换成为GIS软件平台所能识别的格式,并将所有空间和属性数据导入到统一的关系数据库中,以实现数据库对水文地质空间和属性基础数据的统一管理和调用.通过将GIS控件与其它非GIS...  相似文献   

靖边风沙滩地区海子与地下水位演化历史模拟分析     

毛旭阁  罗奇斌  李贵娟  王耀军 《地下水》2011,33(5):53-54

对研究区自1957年至2008年间的水资源利用历史过程进行分析,利用分析结果对研究区海子与地下水位演化历史进行数值模拟。直观的再现由于水资源开发及气候因素等对研究区当地居民生活及自然生态环境造成的影响。由于地下水资源过度利用造成的植被死亡,土地沙化,居民生活困难,环境破坏严重。要加大地下水管理开采力度,保护生态环境。  相似文献   

南水北调中线工程对汉江中下游水环境的影响与可持续发展研究     

陈姗姗  刘俊新  王国义  李芹 《地下水》2011,(6):78-80

南水北调中线工程的实施,对汉江中下游流域的水环境会造成一系列的影响,汉江丹江口以下的水量、水质将发生变化,防洪、水体污染、水土流失、水资源配置与供给、工农业生产以及城市发展等将受到不同程度的影响.通过分析南水北调工程对汉江中下游流域环境的不利影响,提出促进汉江中下游地区可持续发展的基本思路,如生态保护的措施与对策.  相似文献   

天然河床渗滤取水工艺的原理与特点研究——以浠水南城水厂为例     

宋凯  李晓  吴方燕 《地下水》2011,(1):106-108

渗滤取水净水机理主要是利用砂砾石层表面的泥膜及砂砾石层本身过滤作用、吸附作用,微生物的降解作用达到去除水中的悬浮物质、降低水的浊度、除菌的效果。以湖北浠水南城水厂渗滤取水工程为例,通过对渗滤工程特点和水质监测数据的研究,分析天然河床渗滤水水质及水源水水质的差异,以及渗滤水水质的可靠度。  相似文献   

岱海湖开发利用中存在问题及对策研究   总被引：1，自引：0，他引：1  

李志强 《地下水》2011,33(2):113-115

岱海湖位于内蒙古自治区乌兰察布市凉城县境内,是内蒙古第三大湖泊.近年来,受干旱气候和人类活动的影响,湖水成化、湖盆萎缩,流域内水土流失、水体污染加剧,生态环境问题突出.为促进岱海湖环境发展,分析岱海湖开发利用中存在问题,提出流域治理与环境保护的对策具有十分重要的意义.  相似文献   

红河车古铁金多金属矿矿化特征及成因探讨     

孙玉海  李娜  坚润堂  柴旺  蹇龙  詹关山 《云南地质》2011,30(4):425-427

红河县车古铁多金属矿为近期新发现的金矿点,通过矿区已发现的三处矿化体的综合研究,并与典型矿床进行对比,认为本区金矿化体均为热液成因。  相似文献   

红土型金矿中痕量金分析应用研究   总被引：1，自引：0，他引：1  

王枫  王毅泽  吕鹏飞 《云南地质》2011,30(3):353-356

总结红土型金矿运用痕量金分析的理论基础,对不同金标样样品进行准确度、精密度检查,表明痕量金分析可以满足矿点的检查、异常查证的基本要求。与室内法相比,本法有方便、快捷、低成本、高效率及易掌握等特点。  相似文献   

河北省唐海县地下淡水资源均衡分析     

贾秋刚  杨婧 《城市地质》2011,6(1):26-29

随着唐海县的工业和人口发展迅速,地下水处于超采状态。本文采用水均衡法,分析了唐海县地下淡水的补给与排泄量,区内年平均总负均衡为979.76×10~4m~3/a。为唐海县水资源的可持续利用提供了依据。  相似文献   

Irish estuaries: Water quality status and monitoring implications under the water framework directive     

Michael Hartnett  James G. Wilson  Stephen Nash 《Marine Policy》2011

The status of water quality of Irish estuaries is reviewed; this sheds light on the rationale behind the design of the national monitoring programme. Relative to other EU Member States, Ireland's coastal monitoring programme is relatively young and not as advanced. The monitoring programmes in Ireland pre Water Framework Directive (WFD) were structured on a salinity-based typology, with an emphasis on quantifying the variability of the component elements. Although monitoring is a significant obligation under the WFD, there is little guidance on developing monitoring protocols; Member States are developing ad hoc monitoring programme. The Irish Environmental Protection Agency (EPA), responsible authority, undertook research programmes to assist design and implementation of the WFD. A substantial new national monitoring programme was developed. However, the Irish programme is not optimised; the programme is being refined to include elements not yet covered, notably the biota. New research, by the authors, aims to develop a robust approach towards monitoring integrating data and model results. This paper presents changes in Irish marine water quality monitoring policy and some of the associated research necessary to change policy.  相似文献   

The Arctic Ocean halocline and its interannual variability from 1997 to 2008   总被引：1，自引：0，他引：1  

P. Bourgain  J.C. Gascard 《Deep Sea Research Part I: Oceanographic Research Papers》2011,58(7):745-756

As a key structure to understand the role of the ocean on the sea ice mass balance, the Arctic Ocean halocline and its spatiotemporal variability require serious attention. In this paper, we are proposing a new definition of the halocline, which is based on the salinity gradient structure, taking into account both the salinity amplitude and the thickness of the halocline. The Brunt Vaisala frequency is used as the halocline stratification index. CTD data collected from 1997 to 2008 and coming from various sources (icebreaker cruises, drifting buoys, etc.) are used to determine the halocline, and its time and space variability during three time periods, with a special focus on three main regions of the Arctic Ocean: the Canada basin, the Makarov basin and the Amundsen basin. Observations reveal that the halocline in the Amundsen basin was always present and rather stable over the three time periods. In contrast, the Canada and Makarov basins' halocline became more stratified during the IPY than before, mainly because of surface water freshening. In addition, observations also confirmed the importance of the halocline thickness for controlling the stratification variability. Observations suggest that both large scale and small scale processes affect the halocline. Changes in surface salinity observed in the Makarov basin are more likely due to atmospheric variability (AO, Dipole Anomaly), as previously observed. More locally, some observations point out that salt/heat diffusion from the Atlantic water underneath and brine rejection during sea ice formation from above could be responsible for salt content variability within the halocline and, as a consequence, being influential for the variability of the halocline. In spite of the existence of interannual variability, the Arctic Ocean main stratification, characterized by a stable and robust halocline until now, suggested that the deep ocean had a limited impact on the mixed layer and on sea ice in actual conditions. The drastic changes observed in Arctic sea ice during this period (1997-2008) cannot be attributed to a weakening of the halocline that could trigger an enhanced vertical heat flux from the deep ocean.  相似文献