共查询到19条相似文献，搜索用时 125 毫秒
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淄博市大武水源地是中国北方罕见的特大型岩溶-裂隙地下水水源地,地下水开采量为52×10~4m~3/d。为了对岩溶地下水进行有效监测,需要建立最优的地下水监测网。文中在对岩溶地下水流系统分析的基础上,建立了地下水流系统确定性-随机性数学模型,运用有限元与卡尔曼滤波耦合的模拟递推算法,对大武水源地地下水监测网进行了优化设计,结果显示:现有地下水位动态监测网难以达到监测目标,最优地下水位监测网由14个监测井,每月监测一次的监测频率组成,比现有地下水位监测网减少了2个监测井。 相似文献
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河套平原浅层地下水动态监测网优化设计 总被引：1，自引：0，他引：1
河套平原的地下水动态监测网存在监测井空间布局不合理的问题,限制了地下水研究工作的进一步深入.采用水文地质分析法和克里金插值法,并结合实际情况对河套平原的浅层地下水监测网络进行了优化设计.地下水动态影响因素分区图的编制主要考虑了地貌、包气带岩性、浅水位埋深、含水层渗透系数、年均降水量、年均蒸发量以及地下水开采模数7个因子.结果表明,优化设计的监测网共有监测井428眼,优化后Kriging插值误差标准差为2.53~10.99 m,比优化前(2.75~27.00 m)显著降低,这说明优化设计的监测网精度有很大提高.此外,优化后的监测网不仅能够对河岸带、断裂带、咸淡水交互带、地下水降落漏斗区等关键地段的水位实施监测,还能够满足不同地区对监测井密度的需求,具有一定的参考和实践价值. 相似文献
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山西省的地下水监测工作由多个部门共同负责,地下水监测资料为各自的监测目的服务,不能共享,形成重复监测、监测费用浪费的监测现状.本文在分析地下水监测工作现状及存在问题的基础上,提出了在六大盆地建立区域性监测网、调整监测井点、增加监测项目、加强对地下水监测数据管理等工作思路. 相似文献
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大庆油田西部地区地下水动态监测网优化设计 总被引：2，自引：1，他引：2
大庆油田地下水动态监测,网（用水文地质定性方法建立）历经30多年的开采，需要进行定量优化设计，本次研究采用卡尔曼滤波技术与地下水流系统确定－－随机性数值模型相耦合的方法，首先对现有监测网进行质量评价，计算结果表明：监测网在漏斗区（地下水集中开采区）应增加监测孔的数目，调整监测孔的位置，为此，我们拟订了6套12个备选方案，从中选取了由88个监测孔组成的监测网，此监测网无论从监测目标上还是经费上都是最优的。 相似文献
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分析鄯善县地下水监测网的现状和存在的问题,用水文地质分析法对现有监测网进行优化。根据存在地下监测井太少且局部监测井偏大,提出优化方案封堵原有两眼监测井,保留原有16眼监测井,新增加51眼监测井。 相似文献
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记者从北京市地勘局获悉,历时3年、总投资8476万元的北京平原区地下水环境和重要污染源监测网日前建成,1182个＂地眼＂实时监测京城地下水,这意味着北京率先建成国内最全面、最先进的平原区地下水环境监测网系统。 相似文献
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以东北地区某石油烃污染场地为例,在充分掌握研究区内地质、水文地质条件以及相关污染监测数据的基础上,以最优化监测决策支持系统——MAROS为平台,对研究区内现有地下水污染监测网进行优化设计。在阐述数理统计方法、Delaunay方法以及修正的CES方法原理的基础上。分别对区内单井浓度变化趋势和监测网系统污染物质量的空间矩特征、监测井的冗余性以及单井监测频率的有效性进行了分析:基于MAROS平台优化结果,并结合现有地下水污染监测网中取样点的冗余性、空间分布以及监测频率的有效性的分析,提出了该研究区的地下水污染监测网的优化设计方案并分析了其相关影响因素及不确定性因素的影响。研究结果显示,在现有地下水污染监测网中可以去除5口监测井,并根据每口井中污染物浓度的变化趋势、空间分布及其冗余性调整为一年四次、一年一次、两年一次或不监测,进一步提高区内地下水污染监测网的监测效率、降低监测费用,并对地下水污染防治和修复工作具有重要的指导意义。 相似文献
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区域地下水位监测网优化设计方法 总被引：8，自引：4，他引：8
区域地下水位监测提供了定量评价含水层地下水位持续下降及其对环境影响必不可少的信息。历史上的地下水位监测网是为了评价地下水资源或监测水源地降落漏斗而设立的,目前它们已经不能适应为流域水资源综合管理提供必需的信息。本文在综述国际地下水位监测现状的基础上,介绍了区域地下水位监测网优化设计的方法。采用地理信息系统编制的地下水动态类型图为地下水位监测井位置的选择提供了坚实的水文地质基础;克里金插值法能定量评价监测网观测值绘制的地下水位等高线的精度,因而可以用来定量设计地下水位监测网;时间序列分析和统计检验提供了优化地下水位监测频率的定量标准。这些方法已被应用于北京平原、乌鲁木齐河流域和济南岩溶泉域,其成果将在本刊分期发表。 相似文献
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To study arsenic(As) content and distribution patterns as well as the genesis of different kinds of water, especially the different sources of drinking water in Guanzhong Basin, Shaanxi province, China, 139 water samples were collected at 62 sampling points from wells of different depths, from hot springs, and rivers. The As content of these samples was measured by the intermittent flowhydride generation atomic fluorescence spectrometry method(HG-AFS). The As concentrations in the drinking water in Guanzhong Basin vary greatly(0.00–68.08 μg/L), and the As concentration of groundwater in southern Guanzhong Basin is different from that in the northern Guanzhong Basin. Even within the same location in southern Guanzhong Basin, the As concentrations at different depths vary greatly. As concentration of groundwater from the shallow wells(50 m deep, 0.56–3.87 μg/L) is much lower than from deep wells(110–360 m deep, 19.34–62.91 μg/L), whereas As concentration in water of any depth in northern Guanzhong Basin is 10 μg/L. Southern Guanzhong Basin is a newly discovered high-As groundwater area in China. The high-As groundwater is mainly distributed in areas between the Qinling Mountains and Weihe River; it has only been found at depths ranging from 110 to 360 m in confined aquifers, which store water in the Lishi and Wucheng Loess(Lower and Middle Pleistocene) in the southern Guanzhong Basin. As concentration of hot spring water is 6.47–11.94 μg/L; that of geothermal water between 1000 and 1500 m deep is 43.68–68.08 μg/L. The high-As well water at depths from 110 to 360 m in southern Guanzhong Basin has a very low fluorine(F) value, which is generally 0.10 mg/L. Otherwise, the hot springs of Lintong and Tangyu and the geothermal water in southern Guanzhong Basin have very high F values(8.07–14.96 mg/L). The results indicate that highAs groundwater in depths from 110 to 360 m is unlikely to have a direct relationship with the geothermal water in the same area. As concentration of all reservoirs and rivers(both contaminated and uncontaminated) in the Guanzhong Basin is 10 μg/L. This shows that pollution in the surface water is not the source of the high-As in the southern Guanzhong Basin. The partition boundaries of the high- and low-As groundwater area corresponds to the partition boundaries of the tectonic units in the Guanzhong Basin. This probably indicates that the high-As groundwater areas can be correlated to their geological underpinning and structural framework. In southern Guanzhong Basin, the main sources of drinking water for villages and small towns today are wells between 110–360 m deep. All of their As contents exceed the limit of the Chinese National Standard and the International Standard(10 μg/L) and so local residents should use other sources of clean water that are 50 m deep, instead of deep groundwater(110 to 360 m) for their drinking water supply. 相似文献
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关中盆地是一个水文地质结构完整、含水系统与水流系统相对独立、水循环开放的地下水系统。通过概述区域水文地质结构和地下水循环特征,依据地下水含水介质的结构组合、分布特征以及地下水循环特征的不同,将关中盆地地下水系统划分为6类: 黄土台塬孔隙-裂隙含水系统、冲积平原孔隙含水系统、山前洪积平原孔隙含水系统、渭北岩溶含水系统、新近系和古近系砂泥岩互层裂隙-孔隙含水系统及基岩裂隙含水系统。文章总结分析了每种含水系统的富水性、补径排、水化学和动态特征,旨在为客观评价关中经济区水资源现状并提出水资源优化配置、开发利用和保护方案提供依据。研究成果对建设优良、宜居的生态环境和经济可持续发展具有积极的意义。 相似文献
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通过对月牙泉周边区域的水量均衡计算范围、地下水水位监测孔的水位年内变化及牙泉水位下降过程的分析,明确对月牙泉水位产生影响的机井开采区,提出关闭合水村和鸣山村及敦煌城市自来水厂、七里镇自来水厂机井。共关闭机井155眼,减少年开采量1 297.8万/m^3,以应对月牙泉的水位因机井开采而持续下降的问题。 相似文献
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文章采用编制济南岩溶泉域地下水动态类型图的方法优化设计了地下水水位监测密度。通过对地下水水位多年变化趋势的分析确定了手测监测频率。选取质量好的观测孔安装了水位自计仪,提出了地下水水位监测维护措施。将对相关政府部门和每个水用户提供所需的地下水信息,以便达到水管理者与水用户共同参与泉水保护的目的。 相似文献
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《Chemie der Erde / Geochemistry》2023,83(1):125922
Life and the sustainable growth of socioeconomic sectors such as agriculture and industry depend on groundwater, particularly in arid and semi-arid regions where surface water resources are limited. The objectives of the current study are to characterize groundwater chemistry and assess its suitability for industrial usage in the Guanzhong Basin located in the semi-arid region of northwest China. To better understand the hydrogeochemistry in the study area, statistical analysis, ionic plots and Pearson's correlation analysis were conjunctively used. Finally, a novel industrial water quality index (IndWQI) model was developed in this paper to determine the overall industrial water quality based on scaling, corrosion, and foaming coefficients as well as some physicochemical parameters. The contribution of each parameter to the overall industrial water quality was determined using multivariate statistical analysis approaches. The findings reveal that dissolution of minerals such as calcite, dolomite, anhydrite and gypsum regulate the groundwater geochemistry in the study area. In addition, human activities influence the groundwater quality in the study area. According to the novel IndWQI approach, 78.95 % of the confined water samples and 74.51 % of the phreatic water samples have excellent or good quality, and can be safely used for industrial boilers. The geospatial analysis shows that the most contaminated groundwater samples are mainly located in northeast Xi'an and the northeast region of the Guanzhong Basin. The IndWQI model is trustworthy, as it can combine several water quality indices and give an instantaneous impression of the whole groundwater quality for industrial uses. It can serve as a benchmark for other areas across the world with a comparable climate. 相似文献
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TAO Hong ZHENG Miao-miao FAN Li-min LI Wen-li DING Jia LI Hui HE Xu-bo TAO Fu-ping 《地下水科学与工程》2017,5(3):296-302
This paper studies the distribution features, the chemical elements beyond standards and the influencing factors of shallow groundwater quality in the Guanzhong Basin through the data monitored in the last twenty years. The final purpose is to comprehensively evaluate the divisions of groundwater quality in the Guanzhong Basin. Results show that , the groundwater quality is in good shape, and suitable for drinking. Drinking accounts for 16.02% of the total, most of which are distributed in the lubotan of Weibei. Some come from loess plateau of Qian-Liquan County and some are generated by the industrial pollution of Xingping City. Materials exceeding standards include chloride, sulfate, three nitrogen, fluoride, manganese, iron, hexavalent chromium and so on. The main factors influencing the quality of shallow groundwater include groundwater exploitation, natural background value of special components and precipitation, among which the groundwater exploitation poses the greatest impact. The depth of water is positively correlated with the concentration of sulfate, nitrate and total hardness. 相似文献
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BP神经网络方法在地下水动态监测网质量评价中的应用 总被引：3，自引：1，他引：3
本文运用BP神经网络方法构建了地下水动态监测网的质量评价模型，并以甘肃省武威盆地的地下水位监测网为例进行了实例研究。研究表明，在武威和清源附近地下水监测点密度大于0．09／km^2的三个区域，需要进一步调整地下水监测点结构。武威以东、双城以南的地下水位漏斗区和武威以西的山前地带，需要增加地下水监测点。其它地下水监测点密度小于0．03／km^2的地区，则需要根据实际情况而决定。 相似文献
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长春市地下水动态研究 总被引：4，自引：2，他引：2
根据长春市地下水观测井的动态监测资料,分析了长春市主要地下水类型的动态变化规律及原因。2000年以后,地下水位处于回升状态,松散岩类孔隙水水位埋深值年均减少0.16m,基岩裂隙水年均减少0.78m,其主要原因为限制开采量。典型观测孔水位埋深变化趋势公式表明,浅层地下水水位与气温密切相关,但滞后于气温1～1.5个月。 相似文献
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关中城市群地下水自集中开采以来区域地下水位呈整体下降趋势,主要城市集中供水水源地水位降幅30~50 m,最大超过120 m。长期过量开采地下水引起了地下水位持续下降、地面沉降、地裂缝以及水质污染等环境地质问题。近年随着城市群限制开采量,地下水水位下降及其相关环境地质问题在局部地段有所缓和。本文以50年地下水动态监测数据为基础,针对关中城市群地下水动态特征及相关的环境地质问题进行研究分析,并对预防和缓解环境地质问题、合理开发地下水资源提出建议。 相似文献