CZM-2型恒流自动充电器的改进     

田树德  张宝民  吴俊花  王艳荣  张小涛 《东北地震研究》2005,21(3):77-80

本文介绍了改进后的CZM-2型恒流自动充电器的工作原理、安装和调试方法。  相似文献   

Summer Water Balance Characteristics of Koryto Glacier, Kamchatka Peninsula, Russia     

Takane Matsumoto  Renji Naruse  Keiko Konya  Satoru Yamaguchi  Tomomi Yamada  Yaroslav D. Muravyev 《Geografiska Annaler: Series A, Physical Geography》2004,86(2):181-190

The daily water balance for the drainage basin of Koryto Glacier, Kamchatka Peninsula, Russia, was calculated during the period from August to September 2000. The result shows that 14×10⁶ m³ of meltwater and 2×10⁶ m³ of rainwater entered the basin, while 26×10⁶ m³ of water drained from the basin through proglacial streams. Thus, about ?9×10⁶ m³ of water storage reduction occurred in the basin. Vertical displacements of the glacier surface showed that the volume change due to contraction of subglacial cavities was nearly 20% of the total storage change. The remaining fraction of water storage during the period is thought to be stored in englacial and supraglacial locations. The estimate of water balance components in the early ablation season in 2000 indicates that meltwater was already stored within the glacier before the spring, even during the previous year, and that the stored water drained through the ablation season.  相似文献   

沿海堵港蓄淡水库加快水体淡化措施的研究   总被引：4，自引：0，他引：4       下载免费PDF全文

毛献忠  朱小敖  陈甫源  余祈文  翁葆忠 《水科学进展》2005,16(6):773-776

兴建堵港蓄淡水库是浙江省沿海解决水资源短缺措施之一.以浙江省玉环县漩门二期堵港蓄淡水库为例,针对库内深潭分布和盐度分布特点确定抽排位置和规模,并采用Delft3D三维模型计算设计水文条件下采取深水泵抽排深潭底部咸水措施后库内水体淡化过程及其效果.计算结果表明,采用深水泵抽排库内深潭底部咸水,3年后库内剩余盐分只有未采用抽排措施的40%,加快了水体淡化过程,缩短了该水库投入供水的时间.  相似文献   

淮北市岩溶水源地超采评价   总被引：3，自引：0，他引：3  

陶月赞  席道瑛 《水文地质工程地质》2005,32(3):46-50

以安徽淮北市水源地为例,结合水位动态过程与开采影响程度,确定超采的临界水位;利用水位动态模拟模型和超采临界水位,对1997～2003年实际开采过程进行超采程度评价;分析研究区的超采成因,探讨限采规划思路。  相似文献   

准噶尔盆地石南31井区AVO多属性储层及流体预测   总被引：1，自引：1，他引：1  

朱明  潘龙  邹玉萍  张仲祜  张静 《新疆地质》2005,23(4):401-405

针对石南31井油藏评价过程中存在的问题，首先通过AVO正演证明AVO多属性预测砂体空间展布的可行性，其次优选提取出的AVO属性，对每种属性建立对应的检验标准，采用多数据体、多方法综合标定技术准确标定层位．利用P波数据体以层序地层学的方法原理为指导，建立地层和沉积格架；利用泊松比道积分确定砂体内部物性变化，利用流体检测数据体分析砂体含油气情况，最终综合分析以上3个数据体的结果进行油藏评价．通过以上研究说明在含钙泥岩发育地区，利用AVO多属性储层预测是常规方法的有效补充，而AVO油气检测则存在一定多解性．  相似文献   

水合物技术在煤层气储运中的应用前景   总被引：6，自引：0，他引：6  

徐新亚刘道平  黄文件潘云仙 《中国煤田地质》2005,17(3):17-19

介绍了一种新型的煤层气储运技术——水合物储运技术。通过对气体水合物技术的基本原理、储运优点以及目前该技术的发展状况的分析，发现采用水合物技术储运煤层气具有很好的前景。为使该技术迅速走向实用化，指出了今后的研究重点。  相似文献   

Determination of Organic Phosphonates in Aqueous Samples Using Liquid Chromatography/Particle-beam Mass Spectrometry     

J. Klinger  F. Sacher  H.-J. Brauch  D. Maier 《洁净——土壤、空气、水》1997,25(2):79-86

Organic phosphonates are widely used, and in general, they are not easily biodegradable. Therefore, our interest was focussed on the development of an analytical method for the trace-level determination of organic phosphonates in water. Our method combines preconcentration of the analytes by evaporating the water sample with the methylation of the phosphonates using diazomethane. Analysis of the totally methylated phosphonates is done by liquid chromatography coupled with mass Spectrometry by the particle-beam interface. The derivatives could be clearly identified by their electron impact mass spectra as well as their chemical ionisation mass spectra. The totally methylated phosphonates can be separated by liquid chromatography using a 125 mm × 4 mm LiChrospher 100 Diol column and a gradient mobile phase containing n-hexane and isopropyl alcohol. After optimizing preconcentration and derivatization procedures as well as all particle-beam and mass spectra conditions, detection limits in the low ppb range were attained.  相似文献   

用天然氚确定隐伏岩溶水滞留时间及含水层参数   总被引：3，自引：1，他引：3  

马致远  高文义 《煤田地质与勘探》1997,25(4):34-38

天然同位素及水体的完全混合模型，计算了平大岔河隐伏岩溶地下水的滞留时间、含水怪储水系数及储存量。为西北干旱、半干旱非泉珠隐伏岩溶区的地下水资源评价提供了新的研究途径。  相似文献   

上海利用含水层贮冷水和热水试验与应用效果     

孙永福  李勤奋 《上海国土资源》1993,(2):46-53,64

早在60年代末,上海利用地下含水层冬季贮存冷水,夏季抽用;夏季贮存热水,冬季抽用。不仅增加地下水的补给量,提高地下水位,控制地面沉降,而且为工业、民用提供了巨大的廉价的冷源和热源。本文介绍了上海地下含水层储能试验,在全市建立十四个储能试验场,布设储冷井25口,储热井9口,观测井58口。试验与工厂生产结合。经过多周期的灌采试验,建立了一整套的灌采条件下地下水动力模型、温度场模型、水质浓度弥散模型。  相似文献   

An investigation of engineering and environmental concerns relating to proposed highway construction in a karst terrane     

D. A. Hubbard Jr.  W. M. Balfour 《Environmental Geology》1993,22(4):326-329

The proposed realignment of a portion of US Highway 58 near Gibson Station, Lee County, Virginia, indicated significant potential impacts to Young-Fugate Cave, a listed Significant Cave. Field inspection of the site in November 1991, revealed fill for the northbound lane would extend in excess of 100 m into the Fugate blind valley and to within 40 m of the Fugate insurgence. Questions were raised about the risks involved in placing a soil fill across an active blind valley and the extent of the geotechnical investigation. The plans-contained no provisions to direct runoff of road salt or leaks and spills from accessing the Fugate insurgence and thereby endangering two species of troglobitic aquatic crustaceans and a unique troglobitic beetle known to inhabit the cave. Concerns about the distances between the roadbed and cave passages prompted a resurvey of the 1.63-km-long cave. Survey teams encountered groundwater pollution problems in the cave. While exiting the cave, two team members lagging behind another surveyor had to press against the cave walls to avoid a shower of raw sewage. Neither the lead surveyor or the team following, separated by minutes, witnessed the event. On the second field day, survey teams were driven from the cave by petroleum fumes at a second location. Subsequent surface investigations revealed a homeowner complaint of petroleum fumes in their basement and a leaking underground storage tank (LUST) site at an active service station. Tank replacement has resolved the gasoline fume complaint. The sewage inputs to the cave have yet to be located or resolved. Based on the available data at the time this paper was submitted for the Sinkhole Conference, there appeared to be on the order of 10 m between the ceiling of the stream passage and the proposed roadbed; however, unsurveyed cave passages were known to cross over the stream passage in the area where the proposed highway would cross the cave. The Virginia Cave Board is negotiating modifications to this construction proposal based on the engineering and environmental problems at this site.  相似文献