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廊坊市是全国严重缺水的地区之一,水资源的短缺已成为廊坊市国民经济持续快速健康发展的“瓶颈”,为了解决水资源的供需矛盾,对廊坊市的微咸水、雨水、再生水等水资源的开发利用进行调查,对非常规水资源开发利用潜力进行分析,提出非常规水资源的开发利用措施,对缓解廊坊市水资源供需矛盾提供建设性建议。 相似文献
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本文通过分析我国生活饮用水的习惯及我国目前的生活饮用水水质评价对象，对今后我国在生活饮用水方面应注意的问题及生活饮用水水质评价对象提出了建议。 相似文献
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基于水量平衡的农业节水潜力计算新方法 总被引：2，自引：0，他引：2
农业节水潜力是进行节水改造方案评估、用水效率评价及水资源优化配置的重要依据。在回顾和总结农业节水潜力评价指标和计算方法的基础上,综合考虑取水、耗水和回归水3个方面,提出了农业理论节水潜力的概念,并利用水量平衡原理对相应计算方法进行了推导。同时根据不同的节水措施,提出了农业耗水理论节水潜力、农业回归水理论节水潜力和农业取水理论节水潜力的概念及计算方法。基于新方法对柳园口灌区农业理论节水潜力进行了计算,结果表明柳园口灌区农业理论节水潜力为4636.59万m3;其中,农业耗水理论节水潜力最大,农业取水理论节水潜力次之,农业回归水理论节水潜力最小。相关结论为该灌区制定合理的节水灌溉措施和水资源高效利用策略提供了理论依据。 相似文献
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甘肃张掖盆地含水层岩性,电性及富水性关系研究 总被引：2，自引：0，他引：2
本文依据水文地质和测井资料,研究了甘肃张掖盆地含水层岩性、电性及富水性关系和钻孔涌水量分布规律。它为合理利用和开发该盆地地下水资源,提供了新的科学依据。 相似文献
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纯水、超纯水与饮用纯净水 总被引：3，自引：0，他引：3
饮用纯净水按水的纯度概念划分已属各纯水（ 含初级纯水、纯水、高纯水） 范围。制取的水为去离子水、软水、酸性（ 偏） 水,其中尚有无氧的死水。饮用纯净水取自天然,由于制作的过度纯化已不具天然性。因此,饮用纯净水有诸多值得忧虑的问题。天然矿泉水仍有无可比拟的可靠性和珍贵性。 相似文献
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Water accumulation associated with water migration is closely related with the ice segregation,but their coupling relationship is still unclear. To decoupling the relationship of water accumulation and ice segrega⁃ tion,herein,the dynamics of water migration and ice segregation during the freezing and thawing of different soil types under different water supplying conditions have been investigated based on pore water pressure mea⁃ surement and layer-scanning technique. Results showed that apparent water accumulation near the freezing front during the freezing of silty clay and loess tested here,but there exist differences in modes. During loess freezing under closed system,no ice segregation was observed,the pore water pressure increased,and there existed ap⁃ parent liquid water accumulation during the early stage of freezing;while during the freezing of silty clay,there existed ice segregation,the pore water pressure decreased,and no apparent liquid water accumulation occurred during the early stage of freezing. The results implied that there exist two modes of water accumulation near the freezing front during soil freezing：one is the water accumulation induced by water pressure gradient induced by pore ice which results in water flowing from the frozen zone and unfrozen zone to the location near the freezing front;the other is the water accumulation induced by cryo-suction of segregation ice which results in the water flowing from the unfrozen zone to the location near the freezing front. Notably,the contribution from each mode associated with water accumulation of soil freezing depends on whether the ice segregation exists. As no ice seg⁃ regation forms,water accumulation induced water pressure gradient predominates during the early stage of freez⁃ ing. As there exists ice segregation during freezing,water accumulation induced cryo-suction predominates dur⁃ ing the later stage of freezing. Investigating on different modes of water accumulations will be helpful for the ex⁃ ploring the mechanisms of freeze-thaw diseases and the ground ice in the cold regions. © 2023 Chinese Journal of General Practitioners. All rights reserved. 相似文献
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充分利用咸水、微咸水改善沧州水环境 总被引：1，自引：0，他引：1
沧州水资源严重匮乏,不得不大量超采深层地下水,并由此而带来了地面下沉、机井报废、防汛抗旱能力下降等一系列环境地质问题,在特定的地理条件下,沧州区域内咸水、微咸水较为丰富,本文针对上述现状,探讨利用抽成补淡、咸淡混浇、咸水淡化等技术措施,充分利用咸水、微咸水,节约淡水资源,实现对沧州水环境的修复。 相似文献
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平禹一矿充水因素分析及防治水措施 总被引：1，自引：0，他引：1
本文通过对平禹一矿地质条件、水文地质条件、矿井充水因素的分析,认为煤层底板石炭系薄层灰岩和寒武系厚层灰岩岩溶水是主要充水水源;岩溶裂隙、断层、采动裂隙和封闭不良钻孔是煤层底板岩溶水充水通道。并根据所存在的问题提出针对性的防治水措施,为矿井防治水工作提供参考依据和建议。 相似文献
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2016年6月,正在掘进的12409回风顺槽发生异常涌水。涌水点附近出现底鼓,水流带气,其中H_2S体积分数为0. 02%,CH_4体积分数为0. 31%。随后进行潜水泵排水。排水后,水量明显水量减少,水中气味逐渐消失。通过地面及井下地质调查、水样化验分析,指出12409回风顺槽异常涌水源为断层水。为矿井防治水工作提供了水文地质依据。 相似文献
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选取了全国365个城市作为研究对象,进行城市需水、供水和缺水分析,并按照六大分区统计汇总。分析结果表明:按1999年水平年研究城市总需水量为663.4亿m3,总供水量为599.9亿m3,缺水量达63.5亿m3,如果除去超采的32.2亿m3地下水,缺水量达到95.7亿m3。进一步分析认为全国667座城市缺水达到105亿m3。分析制定了缺水标准,据此,研究城市中有275座城市缺水,其中重度缺水城市达93座,并进行了缺水城市的缺水性质、缺水分布和缺水影响的分析。 相似文献
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M. Fricke 《Environmental Geology》1993,22(2):153-161
In Europe different types of water are marketed, each strictly defined by EC Directive 80/777 (Natural Mineral Water, Spring and Table Water) or 80/778 (Drinking Water). In Germany, an additional type of water is common in the market: curative/medical water. Product quality and safety, registration as medicine, and pharmaceutical control are defined by the German Federal Medicine Act. A medical water is treated as any other medicine and may be sold only in pharmacies. The use of any water in Germany is controlled and strictly regulated by the Federal Water Act (Fricke 1981). The following requirements are set by the act: (1) No water use without a permit, which is limited in time and quantity. (2) No single or juristic person may own water. (3) Water resources of public interest and their recharge areas are to be protected by the definition of water protection zones. (Natural mineral water is not of public interest and therefore is not required to be protected by the definition of water protection zones, although it represents a market value of more than US$2 billion. Medical water is of public interest). The definition of water protection zones impacts private property rights and has to be handled carefully. In order to protect water resources, sometimes the economic basis of a traditional industrial and/or agricultural infrastructure is destroyed. The concerns and needs all citizens, including industry, must be considered in analyzing the adequacy of water protection zones. 相似文献