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郑州市是河南省水资源最贫乏地区之一，人均水资源占有量不足全省平均数的一半，水成了制约经济发展的重要因素。本文通过对郑州市地下水资源的开发利用现状调查，及对国民经济建设保证程度分析，针对地下水和地表水资源的分布状况，结合地下水的开发利用现状及存在问题，确定解决全市供需矛盾的主要对策为：调整产业结构，加强科学管理，合理开发利用地下水，区内调剂和外流域调水等。 相似文献
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在简述焉耆盆地水资源形成与分布的基础上，论述了平原区水资源开发利用的现状和存在的主要问题，探讨了水资源开发模式，并提出了平原区地表水和地下水联合开发的比例。 相似文献
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为查明高店子幅地表水和地下水的水化学特征及水环境质量现状,为区域水资源保护与开发提供理论依 据,运用数理统计分析、模糊综合评价和灌溉水水质评价方法对研究区地表水和地下水进行了分析与评价。研究 结果表明:研究区地表水水化学组分波动较大,地下水水化学组分相对较为稳定。地表水水化学类型主要为重碳 酸硫酸－钙镁型水和重碳酸－钙镁型水;地下水水化学类型主要为重碳酸－钙镁型水和重碳酸硫酸－钠 钙 镁 型 水。研究区地表水和地下水水力联系密切,水中主要离子组分来自于盐岩、石膏和碳酸盐的风化溶滤,另 外 还 存 在阳离子交换作用、蒸发浓缩作用和人类活动的共同影响。饮用水水质评价表明,５４．５％的地表水和７１．４％的地 下水适于饮用或基本适于饮用,地下水水质稍好于地表水水质;灌溉水水质评价表明,研究区地表水和地下水均 适于灌溉,合理灌溉不会造成盐害和碱害。 相似文献
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本文通过区域水文地质条件、地下水动态及环境地质问题的分析研究,针对当前嘉兴市地表水遭受污染,地下水严重超采,造成区域地下水位下降及地面沉降等环境地质问题,利用长期监测资料进行地下水开来资源评价,提出合理开发利用地下水资源的区域规划意见,为政府部门水资源综合规划、确定地下水开采量、实施地下水资源开发利用监督管理提供了科学依据。 相似文献
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地下水资源可持续利用的一个急待解决的重要问题,是对地下水补给和更新能力的评价.利用环境同位素技术研究地下水的补给和可更新性是当前较为新颖的方法之一.在西北干旱、半干旱的隐伏岩溶地区,地下水埋藏条件复杂,常规的地质勘探方法所能提供的水文地质信息有限,环境同位素方法在研究地下水的补给及可更新能力方面发挥了优势,可对传统方法进行补充和验证.其结果表明,研究区隐伏岩溶水形成较早,且有大量现代水的混入,平均混入量为54%.说明区内隐伏岩溶水的补给和更新能力较好.环境同位素分析结果还显示,大岔河隐伏岩溶水为一相对独立、半开放的水文地质单元,其补给来源部分为流域内大气降水、地表水的补给,部分为东南部三道沟岩溶地下水的补给;根据环境同位素EPM模型计算,地下水的滞留时间为36 a.地下水储存量为1.314×108 m3; 储水系数为7.29×10-3.这一结果与传统勘探方法的计算结果基本吻合,说明环境同位素方法的实用性. 相似文献
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山东省地热资源类型多且分布广,资源储量丰富,开采条件好,是名副其实的地热资源大省。本文采用逐井调查方法,对山东省范围内地热井数量、开发利用方式、地热流体开采量、地热井与油气资源矿业权重叠等进行了调查,对开发利用过程中存在问题进行研究分析。截至2020年底,全省共有地热井1862眼,主要包括洗浴与疗养模式、洗浴与疗养兼养殖与种植模式、养殖与种植模式、供暖兼洗浴模式四种模式;全省地热流体开采总量约1.405×108m3/a,其中供暖开采量约1.216×108m3/a,供暖面积约4060×104m2;康乐用开采量约0.166×108m3/a,养殖及其他用开采量约0.068×108m3/a。对油气资源矿业权（采矿权、探矿权）与地热井重叠进行论述,分析了地热开发利用过程中存在的问题,为今后全省地热资源的开发利用提供了依据。 相似文献
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青岛市水资源可利用量远远满足不了区内经济快速发展的需要,水资源缺乏已成为青岛市最突出的问题之一。大沽河水源地是青岛市最大的供水水源地,易采易补,本文在以往工作成果的基础上,结合大沽河水源地的水文地质条件,按照在枯水年系列中动用的储存资源在丰水年能够得到补偿的实践经验和思路,对大沽河水源地的地下水资源潜力进行了全面分析,提出新增地下水人工调蓄资源潜力54.54×106 m3/a,为青岛市增大可供水量、缓解水资源供需矛盾提供了后备水源。 相似文献
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一、引言青海地下水天然补给资源量265.82亿m3/a,列全国第12位,与蒙古区相当。地下水可开采资源量98.29亿m3/a,列全国第16位,与河省相当。西部盆地和东部河谷平原下水可开采资源量为25.22亿m3与北京市相当。东部经济区(1市县)土地面积为宁夏全区的1.2倍,下水可开采资源量为13.7亿m3/a,之持平,为地下水资源的贫乏区;全地下水现状开采量不到6亿m3/a,宁夏相当,还有较大的开采潜力,但部环湖平原和河湟谷地尤其是湟水流1市8县地下水开采程度已69%,水资源短缺,成为制约东部地经济社会发展和生态保护的重大瓶问题;全省地下水水质仍处于天然态,反映… 相似文献
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一个流域内既有地表水资源,又有地下水资源,如何根据本流域的自然地质条件更合理地开发利用这些水资源,是个战略决策问题。本文以典型流域为实例,对适宜地表及地下调蓄水资源的条件进行了分析,对中小流域水资源合理调蓄问题提出了笔者的看法。 相似文献
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The ability of cell to modulate the fluidity of plasma membrane was crucial to the survival of microorganism at low temperature. Plasma membrane proteins, fatty acids and carotenoids profiles of Antarctic psychrophilc yeast Rhodotorula sp. NJ298 were investigated at -3 ℃, 0 ℃ and 8 ℃. The results showed that plasma membrane protein content was greater at -3 ℃ than that at 8 ℃, and a unique membrane polypeptide composition with an apparent molecular mass of 94.7 kDa was newly synthesized with SDS-PAGE analysis; GC analysis showed that the main changes of fatty acids were the percentage of unsaturated fatty acids (C18∶ 1 and C18∶ 2) and shorter chain saturated fatty acid (C10∶ 0) increased along with the decrease of the culture temperature from 8 ℃ to -3 ℃; HPLC analysis indicated that astaxanthin was the major functional carotenoids of the plasma membrane, percentage of which increased from 54.6±1.5% at 8 ℃ to 81.9±2.1% at -3 ℃. However the fluidity of plasma membrane which was determined by measuring fluorescence anisotropy was similar at -3 ℃, 0 ℃ and 8 ℃. Hence these changes in plasma membrane's characteristics were involved in the cellular cold-adaptation by which NJ298 could maintain normal plasma membrane fluidity at near-freezing temperature. 相似文献
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《极地研究(英文版)》2014,(4)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprehensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose 相似文献
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《中国海洋大学学报(英文版)》2014,(4)
<正>Copyright Submfnion of a roanusatpt inks:that the work described has not been published before(exoept In the form of an abstrW or as part of a published lecture,review,or thesis);that it is not under consideration for publication elsewhere that its publication has been approved by ail 相似文献
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《中国海洋大学学报(英文版)》2014,(6)
<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research results on oceanography and marine fisheries.The fieldcovered include the physical,chemical,biological,geo- 相似文献
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Massimo GRECO 《山地科学学报》2014,(6):1383-1384
<正>The 35th IAHR World Congress was held in Chengdu,China from September 8 to September 132013.The title of the conference was:"The Wise Finds Pleasure in Water:Meandering through Water Science and Engineering".During the congress,1239 papers were presented in 139sessions for oral presentations and 7 sessions for poster presentations.After the Congress,a Committee was appointed to select some of the best papers presented at the Congress for publication,after a 相似文献
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As an important component of the cryosphere,sea ice is very sensitive to the climate change.The study of the sea ice physics needs accurate sea ice thickness.This paper presents an electromagnetic-induction(EM) technique which can be used to measure the sea ice thickness distribution efficiently,and the successful application in Bothnian Bay.Based on the electromagnetic field theory and the electrical properties of sea ice and seawater,EM technique can detect the distance between the instrument and the ice/water interface accurately,than the sea ice thickness is obtained.Contrastive analysis of the apparent conductivity data obtained by EM and the value of drill-hole at same positions allows a construction of a transformable formula of the apparent conductivity to sea ice thickness.The verification of the sea ice thickness calculated by this formula indicates that EM technique is able to get reliable sea ice thickness with average relative error of only 12%.The statistic of all ice thickness profiles shows that the level ice distribution in Bothnian Bay was 0.4-0.6 m. 相似文献
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Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area. 相似文献
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Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter. 相似文献
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《极地研究(英文版)》2014,(3)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied 相似文献