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1.
环渤海山东地区地下水库建设条件分析 总被引：9，自引：3，他引：9
环渤海山东地区是我国北方缺水地区之一 ,主要原因是水资源在时间上的不均匀分布 ,年内、年际降水量差别大。实践表明 ,修建地下水库工程 ,对区内水资源进行多年调蓄利用 ,是缓解该区水资源供需矛盾的重要措施。研究区水文地质条件差异较大 ,一方面胶东低山丘陵滨海河谷区、鲁中南山前冲洪积扇区及黄泛平原古河道带含水层厚度较大、颗粒较粗、调蓄能力较强 ;另一方面鲁中南山前冲洪积平原区和胶东半岛滨海平原部分地段地下水位多年持续下降 ,腾出了巨大的地下库容 ;这些都为修建地下水库提供了条件。本文中将该区地下水库划分为山间河谷型、滨海平原型、冲洪积扇型和冲积平原古河道型 4类 ,并根据地下水库库址选取的 6个基本条件选出了 2 6处地下水库库址 ,这些地下水库的总库容达 6 5 .17× 10 8m3 ,最大调节库容总和为 2 8.39×10 8m3 ,建库后库区地下水可采资源量增长 73% ,可取得明显的水资源效益。同时修建地下水库可以改善库区附近水环境质量 ,遏制海 (咸 )水入侵、土壤次生盐渍化等环境地质问题 相似文献
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大连市是我国严重缺水地区之一 ,至 2 0 0 5年城市缺水为 110 4 2 .5× 10 4m3 ,占需水量的 17.1% ,其中大连城区 (金州以南地区 )缺水 9890× 10 4m3 ,占缺水量的 89.6 %。开发利用滨海河谷地下水资源 ,建立滨海河谷型地下水库 ,不仅可以治理大连地区严重的海水入侵问题 ,增加水资源量 ,满足当地农业及生活用水 ,同时可弥补城市供水的不足。根据前人工作成果分析及野外实地勘查 ,大连市适于建设河谷型地下水库的滨海河谷有 2 2条 ,建成后的总库容量 10 36 0 2 .9× 10 4m3 ,开采资源量 2 5 76 6 .88× 10 4m3 ,可增加开采资源量 12 5 4 2 .4 5× 10 4m3 。 相似文献
3.
地下水库特征水位与特征库容的划分及确定研究 总被引：2，自引：0，他引：2
参考地表水库调控指标的划分方法,将地下水库的特征水位与特征库容划分为死水位与死库容、正常蓄水位与调蓄库容、腾空库容和已占库容以及总库容,并提出了特征水位确定的一般原则以及承压地下水库的库容计算原理与方法。以大庆市西部地下水位降落漏斗区地下水库为实例,确定地下水库水量调蓄的死水位为115m,正常蓄水位为132m,结合现状地下水位,计算得出相应的死库容为1161.58×108m3,调蓄库容为1.75×108m3,腾空库容为1.57×108m3,总库容为1163.33×108m3。 相似文献
4.
环渤海地区地下水资源与环境地质若干问题探讨 总被引：5，自引：1，他引：5
环渤海地区在我国经济发展中具有重要战略地位。面对区内水资源的日益短缺和地质灾害严重,合理开发利用地下水资源,有效保护地质环境,是实现环渤海地区社会、经济可持续发展的重要措施。本文中以环渤海地区地下水资源与主要环境地质问题现状为基础,围绕区内社会、经济发展需求,就环渤海地区地下水资源与环境地质调查下一步工作进行了探讨,提出重点应放在优化调整地下水开采布局和层位,充分开发利用浅层地下水;利用滨海河谷建设地下水库;利用地下空间和雨洪水资源,实施地下水与地表水联合调度;扩大咸水资源改造利用;勘查、建立城市应急(后备)水源地;开展地下水污染调查;加强地下水动态监测与研究等措施,建立以城市、港口为重点的地下水供水安全保障体系。环境地质调查重点则放在确定海岸基准线,开展重点城市、港口以及湿地环境地质调查评价,建立海岸带地质环境监测体系和地质灾害预警系统,构建海岸带地质环境保障体系等方面。 相似文献
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吉林省地下水开发的另一途径--地下水库的开发利用 总被引：5，自引：0，他引：5
开发建设地下水库是一项工程量小,环境影响小,投资少,效益大的开源节流工程.吉林省,特别是水资源短缺的中西部平原区具有辟建地下水库的有利水文地质条件.全省仅平原区可利用地下水库库容量137.3×108m3.可见,地下水库的开发利用在防洪减灾、开源节流的水资源调控中会起到巨大作用. 相似文献
7.
《地下水》2017,(6)
依据榆溪河流域水文地质条件构建水文地质概念模型,在此基础上基于可视化数值模拟软件建立流域三维地下水流数值模型,模型经识别与校验完成后,分别对流域地下水补给排泄量、地下水储量、可开采资源量进行计算评价,研究表明:(1)流域2006年、2009年和2010年在均衡期内地下水处于负均衡状态;2007年、2008年、2011年、2012年和2013年在均衡期内地下水处于正均衡状态。(2)区内第四系含水岩组地下水容积储存量为157.488×108m3,侏罗系含水岩组地下水弹性储存量为9.477×108m3。(3)全流域现状地下水开采率为16.40%,新增开采后总的地下水开采率为29.21%,属于较低~合理水平。 相似文献
8.
对滹沱河地下水库建设条件进行了分析,得出如下结论:滹沱河地下水库边界为一近封闭的边界,库容量达10.04×108 m3,滹沱河河床可作为地下水库天然渗漏场。通过入渗试验得出,在动水条件下,单位河长稳定入渗量为29.18×104 m3/km.d(平均河道宽度222m),入渗速率1.31×104 m3/m2.d,垂直入渗系数31.62m/d,入渗水对地下水的补给系数为0.91。利用库区原有的取水设施年开采能力可达2.19×108m3。根据预测结果,2020、2030年在不同的保证率下,尚有盈余水量进行地下水库的调蓄,且调蓄水源的水质对地下水水质影响不大。 相似文献
9.
建立地下水的合理开发利用模式,对能源基地建设及缓解其水资源紧缺状况十分重要。在分析南梁白豹地区的地下水开采条件的基础上,选择了典型地区建立了三维地下水流概念模型和数值模型。通过模拟计算不同单井开采量、不同井间距开采方案作用下的降落漏斗形态,对该区内地下水资源的合理开发利用方式进行了分析研究,结果表明,在该区内地下水开采井应布设在较大的河谷区,以线状井排方式开采,以截取河流排泄量为开采量,地下水线状开采强度以不超过(0.02～0.03)×104m3/(d·km)为宜。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
12.
Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
13.
The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
14.
Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931. 相似文献
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正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.) 相似文献
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正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.) 相似文献
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正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.) 相似文献
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正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus., 相似文献
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正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an 相似文献
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正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of 相似文献