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Nutrient Removal Structures Using Locally-Sourced Iron and Aluminum By-Products Reduce Nutrient Runoff from Broiler Production Facilities 认领
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作者 Sheri L. Herron Andrew N. Sharpley +1 位作者 Kristofor R. Brye James M. Burke 《环境保护(英文)》 2020年第4期332-343,共12页
A common issue with filters designed to remove nutrients from runoff is their reduced effectiveness in high-flow conditions. To overcome this challenge, it was determined that nutrient removal from broiler-house fan d... A common issue with filters designed to remove nutrients from runoff is their reduced effectiveness in high-flow conditions. To overcome this challenge, it was determined that nutrient removal from broiler-house fan dust could be more effective if nutrient removal was conducted at the nutrient source. The objective of this study was to evaluate the effectiveness of containment trays (CTs) holding locally sourced by-products installed adjacent to broiler house fans at the University of Arkansas Savoy broiler production facility to capture nutrients released from dust during rainfall over four years (2013 to 2017). By-products used were locally sourced, iron-based red mud (RM) generated during the manufacture of steel belts for tires and alum-based drinking water treatment residual (WTR), where both materials have large phosphorus (P) sorption capacities. Four-year mean annual concentrations of dissolved P of through-flow from RM CTs were consistently below 0.7 mg·L-1 and below 1.6 mg·L-1 for WTR CT through-flow. This equated to an average 11- and 4-fold decrease for RM and WTR, relative to concentrations in runoff from same-sized plots adjacent to sidewall fans, demonstrating their potential to trap P at the source and decrease P runoff to nearby flowing waters. While there was no significant decline in RM or WTR effective-ness over the four-year study, further work needs to be conducted to determine the lifespan of CTs. Use of RM and WTR in CTs at poultry broiler production facilities, along with their subsequent land application, has the potential to reduce the amount of by-product materials that are currently landfilled. 展开更多
关键词 Nitrogen RUNOFF Phosphorus RUNOFF POULTRY Production Red MUD WATER Quality WATER Treatment Residual
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Detection of Human Pharmaceuticals in the Surface Water of East Fork Stones River 认领
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作者 Ravneet Kaur Anonya Akuley-Amenyenu +1 位作者 Karnita G. Garner Sam O. Dennis 《水资源与保护(英文)》 2020年第3期240-259,共20页
Pharmaceuticals have been detected nationwide in different environmental matrices including wastewater effluents and surface water. In recent studies, pharmaceuticals have also been found in aquatic plants, fish tissu... Pharmaceuticals have been detected nationwide in different environmental matrices including wastewater effluents and surface water. In recent studies, pharmaceuticals have also been found in aquatic plants, fish tissues and plasma of shark bulls. Pharmaceuticals that were detected as indicated in published literature, included steroids, prescription drugs such as antibiotics, anti-depressants, anti-inflammatory drugs, hormones and over the counter (OTC) drugs. We conducted a monitoring study to detect the presence of pharmaceuticals in East fork of the Stones River located in Rutherford County in Middle Tennessee. East Fork Stones River is a six (6) order river that drains a large portion of Rutherford County including Murfreesboro, Tennessee. Grab water samples were collected from Stones River for three seasons: (summer and fall of 2014 and 2015 and winter of 2015 and 2016) each year. Water quality parameters were also determined in situ using Eureka Water ProbesTM multi-parameter sondes. Water samples were analyzed for the presence of pharmaceutical compounds using GC-MS. Chemical Abstract Service Registry Numbers (CASRN or CAS) for detected pharmaceuticals were identified. Pharmaceuticals detected included those used for treatment of chronic alcoholism (Disulfiram: CAS # 97-77-8), a compound (Thiazolidine: CAS # 504-78-9) in the drug Thiazolidinedione which is used for the treatment of type II diabetes, a compound associated with the prevention of anti-inflammatory conditions (Methyl palmitate: CAS # 112-39-0), and emollient in skincare (Undecane: CAS # 1120-21-4). While the quantitative concentrations of these drugs were not determined in this study, their qualitative presence in surface water is noteworthy. 展开更多
关键词 Pharmaceuticals EAST FORK STONES RIVER Surface WATER WATER Quality
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彰武水库水环境质量评估 认领
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作者 李中原 王国重 +2 位作者 张继宇 左其亭 程焕玲 《中国农学通报》 2020年第9期30-36,共7页
为了明确彰武水库环境质量状况,依照功能区对水质的要求和2009—2015年的实测水质数据,通过单因子水质标识指数法、综合污染指数法、有机污染指数法来评估其水环境状况,结果表明:(1)TN是该水库的主要污染因子,仅有4个月份能满足水质要求... 为了明确彰武水库环境质量状况,依照功能区对水质的要求和2009—2015年的实测水质数据,通过单因子水质标识指数法、综合污染指数法、有机污染指数法来评估其水环境状况,结果表明:(1)TN是该水库的主要污染因子,仅有4个月份能满足水质要求,其年均单因子水质标识指数都大于6;其次是TP,有53个月份水质超标,其年均单因子水质标识指数除2013年外均超标。(2)根据综合污染指数,该水库仅有5个月份水质合格,其他月份则处于污染状态,其中有39个月份为重度污染,这导致其年均和水期污染指数在污染与重度污染之间变化。(3)依据有机污染指数,有7个月份水质为基本合格,其他月份水质在较好与良好之间变动,没有发生有机污染;其年均和水期有机污染指数在较好与良好之间变化,有向水质恶化方面发展的趋势。 展开更多
关键词 彰武水库 环境质量 水质 单因子水质标识指数 综合污染指数 有机污染指数 评估
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北京大学燕园校区水质分析与校园水环境保护 认领
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作者 刘雪蕾 李恩敬 +1 位作者 陈倩 刘克新 《实验室研究与探索》 CAS 北大核心 2020年第6期265-267,272,共4页
为确保燕园校区的饮用水、景观水、排放污水的水质达标,根据相关规范和标准对检测数据进行分析,发现在没有人为因素影响下,燕园校区的各类水质均达到或高于国家标准。在燕园污水排放方面,部分排水口检测值偏高,在现有的条件下尽量减少... 为确保燕园校区的饮用水、景观水、排放污水的水质达标,根据相关规范和标准对检测数据进行分析,发现在没有人为因素影响下,燕园校区的各类水质均达到或高于国家标准。在燕园污水排放方面,部分排水口检测值偏高,在现有的条件下尽量减少指数偏高排水口附近的用水设计规划,科学减少污水排放,从源头控制污水排量。学校在燕园校区的景观水环境保护投入了大量人力物力,实施了未名湖治理工程,将未名湖区域水体改造为自循环,并进行了清淤疏通;将未名湖北侧的后湖区域进行清淤改造,重新打造了后湖区域的生态景观;实施西校门外蔚秀园湖区的清淤改造,实现了整体湖区的灌溉。为营造舒适、宁静的校园环境提供了支撑,为学校进入世界一流大学、培养世界一流人才提供了保障。 展开更多
关键词 北京大学 水质 水质检测 水环境保护
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河流水情要素遥感研究进展 认领
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作者 史卓琳 黄昌 《地理科学进展》 CSSCI CSCD 北大核心 2020年第4期670-684,共15页
河流是促进地貌形成和演化的重要因素,也是地球上最重要的淡水资源之一。河流的水体范围、水位/水深、流量、水质和冰情等水情要素在水资源动态监测和水文生态环境保护等研究中具有至关重要的作用。通过水文站观测河流可获得站点上的水... 河流是促进地貌形成和演化的重要因素,也是地球上最重要的淡水资源之一。河流的水体范围、水位/水深、流量、水质和冰情等水情要素在水资源动态监测和水文生态环境保护等研究中具有至关重要的作用。通过水文站观测河流可获得站点上的水情信息,但该方式在财力、物力方面均耗费巨大。同时,对于日益增长的河流水情信息需求,迫切需要一种能够快捷、准确补充河流实测数据的方法。遥感凭借全方位、多时相的对地观测能力极大地提升了河流水情信息获取的效率,已广泛应用于多尺度水情监测、无资料流域水文模拟等多个方面,取得了丰硕的研究成果。因此,有必要对近年来遥感应用于河流水情要素反演所取得的进展进行归纳、总结和展望,以期进一步促进遥感数据和方法在该领域的应用。论文以"河流水情要素遥感"为主题,系统归纳了河流水体遥感提取的常用传感器及方法、水位/水深遥感反演方法、河道流量遥感估算、河流水质及河冰遥感监测的研究进展,详细归纳了利用光学/微波遥感等不同类型的遥感手段获取河流水体范围、水位、水深的优势与不足,总结得出了河流水情要素遥感研究的数据、方法及应用方面的主要结论:①新型遥感数据在河流水情要素监测中的应用愈加广泛,在空间分辨率、时间分辨率或光谱分辨率等方面不断突破,进一步丰富了河流水情要素研究的数据来源;②多数中低空间分辨率光学影像依旧面临混合像元影响水体提取精度的问题,合成孔径雷达影像也存在数据处理算法开发难度大的问题,细小河流及非开阔水体的提取方法仍需探索;③大数据和云计算技术的发展为实现大尺度、长时序的河流水情要素高时空分辨率遥感监测提供了高效手段。 展开更多
关键词 水体 水位/水深 河道流量 水质 河冰 光学/微波遥感
Analysis of Gray Water Recycling by Reuse of Industrial Waste Water for Agricultural and Irrigation Purposes 认领
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作者 Safieh Javadinejad Rebwar Dara +2 位作者 Masoud Hussein Hamed Mariwan Akram Hamah Saeed Forough Jafary 《地理研究(英文)》 2020年第2期20-24,共5页
Isfahan industrial province with its numerous industrial estates in its area and consequently the amount of wastewater produced by these settlements is very difficult to deal with.Therefore,the need for proper wastewa... Isfahan industrial province with its numerous industrial estates in its area and consequently the amount of wastewater produced by these settlements is very difficult to deal with.Therefore,the need for proper wastewater treatment and efficient management of industrial waste water from the industrial estates of this province should be seriously addressed and followed up by the authorities.The purpose of this study is the feasibility of reuse of wastewater from industrial settlements for agricultural and irrigation purposes.The present study is a descriptive cross-sectional study.In this study,the average values obtained from the sampling and the results of the experiments on waste water from the industrial waste water treatment plant in Isfahan,2017,have been used.Average values of BOD5,COD,TSS and so on were compared with the standards set by the Environmental Protection Agency and analyzed in Excel software.According to the results,the average values of COD,BOD5,TSS,SO4,pH and catalyst quality parameters were determined from wastewater effluents of 315,162,93,164(mg/L),8.3 and 32.5(NTU)respectively.The results of the study show that the average values of the quality parameters examined from the effluent of the treatment plant other than BOD5 and COD are within the standard range and the limit for agricultural and irrigation purposes,which may lead to undesirable environmental performance of these two parameters. 展开更多
关键词 Gray water Water recycle Water quality Irrigation water users Industrial users
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闽江水源热泵系统在福州地区应用现状与前景分析 认领
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作者 欧阳恒 肖剑仁 陈震宇 《建筑科学》 CSCD 北大核心 2020年第4期80-85,共6页
为了促进地表水源热泵系统在福州地区应用和推广,本文综述了利用闽江水作为源水的江水源热泵系统的项目概况、系统方案选型、取水与水处理技术、系统运营状况等内容。同时,从江水资源的水量、水质和水温等直接相关因素分析江水源热泵系... 为了促进地表水源热泵系统在福州地区应用和推广,本文综述了利用闽江水作为源水的江水源热泵系统的项目概况、系统方案选型、取水与水处理技术、系统运营状况等内容。同时,从江水资源的水量、水质和水温等直接相关因素分析江水源热泵系统的应用前景,并对江水源热泵系统在福州地区推广应用提出了合理化的建议。 展开更多
关键词 闽江 江水源热泵 水处理技术 水质 水环境
文章速递长江流域水资源保护与管理 认领
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作者 穆宏强 《水电与新能源》 2020年第9期1-5,共5页
水资源保护为长江生态环境保护的重要方面。在“长江大保护”的背景下,如何保护好长江水资源和水生态是应该深入研究的大课题。为此,介绍了长江水资源保护与管理状况,以及长江的水资源质量状况,根据新形势下的长江水资源保护要求与工作... 水资源保护为长江生态环境保护的重要方面。在“长江大保护”的背景下,如何保护好长江水资源和水生态是应该深入研究的大课题。为此,介绍了长江水资源保护与管理状况,以及长江的水资源质量状况,根据新形势下的长江水资源保护要求与工作基础,就长江水资源保护与管理的核心内容做了分析,结合存在的问题,提出了一些观点,期望能对长江水资源保护与管理提供参考。 展开更多
关键词 长江流域 长江大保护 水资源 水量 水质 水生态
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文章速递2016-2018年大理市生活饮用水水质监测结果分析 认领
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作者 程家国 宇柏成 +2 位作者 谭晓东 刘敏 杨彩艳 《医学动物防制》 2020年第10期986-989,共4页
目的分析2016-2018年大理市生活饮用水水质监测结果,了解大理市生活饮用水水质卫生状况,为制定科学的、合理的生活饮用水安全管理策略和大理市城市改水和农村改水提供参考依据。方法参照《生活饮用水标准检验方法》(GB 5750-2006)分别于... 目的分析2016-2018年大理市生活饮用水水质监测结果,了解大理市生活饮用水水质卫生状况,为制定科学的、合理的生活饮用水安全管理策略和大理市城市改水和农村改水提供参考依据。方法参照《生活饮用水标准检验方法》(GB 5750-2006)分别于2016-2018年在大理市生活饮用水供水点采集枯水期(1~3月)和丰水期(7~9月)的出厂水、末梢水各一份进行水质采集、运输、保存和检测,水质检测结果依据《生活饮用水卫生标准》(GB 5749-2006)进行评价。结果2016-2018年大理市共监测生活饮用水水样638份,总体合格率72.73%,各年水样合格率分别为61.53%、69.44%、86.91%,不同年份生活饮用水水质合格率间差异有统计学意义(χ^2=36.022,P<0.05);总体枯水期合格率为68.44%,丰水期合格率为49.84%,差异有统计学意义(χ^2=22.456,P<0.05);城市和农村生活饮用水合格率分别为91.10%、57.48%,差异有统计学意义(χ^2=96.469,P<0.05);3年饮用水水质监测不合格指标主要为总大肠菌群,其次为大肠埃希氏菌和菌落总数。结论目前微生物污染是大理市生活饮用水水质不合格的主要原因,各供水单位按要求修建消毒设施并严格消毒是保障大理市67.9万市民生活饮用水水质安全的主要措施。 展开更多
关键词 生活饮用水 水质 监测 结果分析 水质安全
气候变化与农业活动对中国开都河流域下游水质的影响 认领
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作者 巴乌龙 杜鹏飞 +4 位作者 刘铁 包安明 陈曦 刘蛟 秦成新 《地理学报:英文版》 SCIE CSCD 2020年第1期164-176,共13页
In the context of climate change and over-exploitation of water resources,water shortage and water pollution in arid regions have become major constraints to local sustainable development.In this study,we established ... In the context of climate change and over-exploitation of water resources,water shortage and water pollution in arid regions have become major constraints to local sustainable development.In this study,we established a Soil and Water Assessment Tool(SWAT)model for simulating non-point source(NPS)pollution in the irrigation area of the lower reaches of the Kaidu River Basin,based on spatial and attribute data(2010-2014).Four climate change scenarios(2040-2044)and two agricultural management scenarios were input into the SWAT model to quantify the effects of climate change and agricultural management on solvents and solutes of pollutants in the study area.The simulation results show that compared to the reference period(2010-2014),with a decline in streamflow from the Kaidu River,the average annual irrigation water consumption is expected to decrease by 3.84×10^8 m^3 or 8.87%during the period of 2040-2044.Meanwhile,the average annual total nitrogen(TN)and total phosphorus(TP)in agricultural drainage canals will also increase by 10.50%and 30.06%,respectively.Through the implementation of agricultural management measures,the TN and TP in farmland drainage can be reduced by 14.49%and 16.03%,respectively,reaching 661.56 t and 12.99 t,accordingly,and the increasing water efficiency can save irrigation water consumption by 4.41×10^8 m^3 or 4.77%.The results indicate that although the water environment in the irrigation area in the lower reaches of the Kaidu River Basin is deteriorating,the situation can be improved by implementing appropriate agricultural production methods.The quantitative analysis results of NPS pollutants in the irrigation area under different scenarios provide a scientific basis for water environmental management in the Kaidu River Basin. 展开更多
关键词 CLIMATE change AGRICULTURAL management non-point POLLUTANTS SWAT Kaidu River BASIN water quality
A Review of Water Quality Optimisation Models and Techniques 认领
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作者 Douglas Kwasi Boah Stephen Boakye Twum 《应用数学与应用物理(英文)》 2020年第3期424-433,共10页
This paper presents a state of the art review of water quality optimisation models and techniques from early 1970s to date in terms of the model/technique category, model/technique type, purpose and application. The m... This paper presents a state of the art review of water quality optimisation models and techniques from early 1970s to date in terms of the model/technique category, model/technique type, purpose and application. The models are categorised into Mathematical Programming Models and Meta-heuristic Programming Models. Similarly, the techniques are categorised into Mathematical Programming Techniques and Meta-heuristic Programming Techniques. The review is concluded by drawing attention to the rare nature of application of interior-point methods to water quality optimisation. 展开更多
关键词 Water Quality Optimisation MATHEMATICAL PROGRAMMING Model META-HEURISTIC TECHNIQUES
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Hydrochemistry and Quality Assessment of Water in Tannur Dam, Southern Jordan 认领
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作者 Omar A. Al-Khashman Hani M. Alnawafleh 《现代水文学期刊(英文)》 2020年第1期1-19,共19页
The study was undertaken to assess the physicochemical and chemical quality of the Tannur dam water in southern Jordan. The water samples were collected in two intervals the first during May 2015 and the second during... The study was undertaken to assess the physicochemical and chemical quality of the Tannur dam water in southern Jordan. The water samples were collected in two intervals the first during May 2015 and the second during September 2015. All samples were analyzed for temperature, conductivity, dissolved oxygen, pH, major cations (Ca2+, Mg2+, K+, Na+), and major anions (Cl-, NO3-, HCO3- and SO42-). The hydrogeochemical analyses of thirty-six water samples were used to determine the properties and type of water in the Tannur dam. The ion concentration in the water samples was from dissolution of carbonate rocks and ion exchange processes in clay. The general chemistry of water samples was typical alkaline earth waters with prevailing bicarbonate chloride. The PHREEQC Hydrogeochemical modeling was used to obtain the saturation indices of specific mineral phases, which might be related to interaction with water and aquifer, and to identify the chemical species of the dissolved ions. Calcite and dolomite solubility were assessed in terms of saturation index where they show positive values indication oversaturated SI > 0. The hydrogeochemistry behavior is rather complicated and is affected by anthropogenic and natural sources. The positive correlation values between various parameters indicate that most of ions result from same lithological sources. The abundance of the major ions in water samples is in the following order: HCO3-> Ca2+ > Cl- > NO3- > SO42-) > Na+ > Mg2+ > K+. Water samples of the Tannur dam are generally very hard, high to very high saline and medium alkaline in nature. High total hardness (TH) and total dissolved solids (TDS) in some samples identify the permissible for domestic and irrigation purposes. According to the residual sodium carbonate, SAR and conductivity values, the studied water is suitable for agricultural purposes. 展开更多
关键词 HYDROCHEMISTRY Tannur DAM JORDAN SATURATION Indices WATER Quality
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倒水河武汉段水环境现状调查与保护对策 认领
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作者 朱敏 汪海涛 +1 位作者 吴咪娜 吴学灿 《环境科学导刊》 2020年第3期11-14,共4页
针对倒水河武汉段多次出现水质超标现象开展流域范围内水质状况及污染负荷数据收集和现状调研,分析得出流域范围内存在的主要问题为农业农村面源污染形势严峻、污水治理基础设施建设管理不足、水文水资源影响及上游水质恶化,结合倒水河... 针对倒水河武汉段多次出现水质超标现象开展流域范围内水质状况及污染负荷数据收集和现状调研,分析得出流域范围内存在的主要问题为农业农村面源污染形势严峻、污水治理基础设施建设管理不足、水文水资源影响及上游水质恶化,结合倒水河实际提出系列水环境治理措施:农业农村污染控制、城镇生活污染物防治、实施连通湖泊保护工程、完善流域污染监控及联防联控工作机制。 展开更多
关键词 水环境 现状调查 对策 倒水河 武汉
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Tile-Drain and Denitrification Bioreactor Water Chemistry for a Soybean (<i>Glycine max</i>(L.) Merr.)-Corn (<i>Zea mays</i>L.) Rotation in East-Central Missouri (USA) 认领
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作者 Michael Aide Indi Braden +6 位作者 David Mauk Robert W. McAlister Byron McVay Susan Murray Samantha Siemers Sven Svenson Julie Weathers 《地球科学和环境保护期刊(英文)》 2020年第4期143-154,共12页
Nitrogen transport from agriculture production fields raises the specter of environmental degradation of freshwater resources. Our objectives were to document and evaluate nitrate-N, ammonium-N, phosphorus and other n... Nitrogen transport from agriculture production fields raises the specter of environmental degradation of freshwater resources. Our objectives were to document and evaluate nitrate-N, ammonium-N, phosphorus and other nutrients emanating from a 40-ha controlled subsurface irrigation drainage technology coupled in series with a denitrification bioreactor. The intent of the denitrification bioreactor is to create an environment for anoxic microbial populations to support denitrification. We monitored the tile-drainage effluent and denitrification bioreactor water chemistry under a corn-soybean rotation to estimate the nutrient concentrations and the competence of the denitrification bioreactor to foster denitrification. Nitrate-N bearing tile drainage effluents ranged from less than 1.5 to 109 mg NO3- -N/L, with the nitrate concentration differences attributed primarily to the: 1) timing of nitrogen fertilization for corn, 2) soil mineralization and residue decomposition, and 3) intense rainfall events. The denitrification bioreactor was highly effective in reducing drainage water nitrate-N concentrations providing the rate of water flow through the denitrification bioreactor permitted sufficient time for equilibrium to be attained for the nitrate reduction reactions. The nitrate-N concentrations entering the denitrification bioreactor ranged from 0.4 to 103 mg NO3-?-N/L in 2018, whereas the outlet nitrate concentrations typically ranged from 0.3 to 5.2 mg NO3- -N/L in 2018. Nitrate tile-drainage effluent concentrations in 2019 were marginal, given soybeans obtain nitrogen from biological nitrogen fixation. Nutrient uptake by corn reduced the soil nitrate leaching pool and created nitrogen-bearing biomass, features important for formulating best management practices. 展开更多
关键词 Nitrogen Edge of Field DENITRIFICATION BIOREACTOR Water Quality TILE Drainage
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水驱污水站水质影响因素分析及治理建议 认领
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作者 董秀龙 《油气田地面工程》 2020年第6期43-47,共5页
2013年对A水驱污水站所属区块进行强碱三元复合驱开发,2016年A水驱污水站含油达标率、含悬浮物达标率开始显著下降,2017年下游5座深度污水处理站出水水质无法稳定达标。针对A水驱污水站出水水质逐渐恶化的现象,分别对系统工艺、节点管... 2013年对A水驱污水站所属区块进行强碱三元复合驱开发,2016年A水驱污水站含油达标率、含悬浮物达标率开始显著下降,2017年下游5座深度污水处理站出水水质无法稳定达标。针对A水驱污水站出水水质逐渐恶化的现象,分别对系统工艺、节点管理进行分析,发现影响水质的主要原因有:A脱水站未实现水驱、三元分质运行,导致A污水站聚合物、表面活性剂浓度升高;油田已建水驱、三采调水管网互有联通,部分三采污水进入水驱污水系统;A水驱污水站上游的A脱水站所辖8座水驱转油站全面见剂;部分污水站处理设备老化较为严重,处理效果较差,去除率较低。通过影响因素分析,系统运行时采取分质处理、优化污水调运管道、完善设备设施,使处理工艺与水质相适应,同时加强各节点管理,实现污水站水质稳定达标。 展开更多
关键词 水驱污水站 深度污水站 水质 分质运行 影响因素 治理
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Applying multivariate statistics for identification of groundwater chemistry and qualities in the Sugan Lake Basin, Northern Qinghai-Tibet Plateau, China 认领
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作者 XIANG Juan ZHOU Jun-ju +6 位作者 YANG Jun-cang HUANG Mei-hua FENG Wei LI Qiao-qiao XUE Dong-xiang ZHAO Ya-ru ZHU Guo-feng 《山地科学学报:英文版》 SCIE CSCD 2020年第2期448-463,共16页
The Sugan Lake Basin is located in the inland arid region of northwestern China,in which groundwater is of great significance to human and ecology.Therefore,it is necessary to understand the chemical characteristics a... The Sugan Lake Basin is located in the inland arid region of northwestern China,in which groundwater is of great significance to human and ecology.Therefore,it is necessary to understand the chemical characteristics and quality of groundwater in the basin.Based on samples collected from 35 groundwater wells in Sugan Lake Basin,the spatial distribution characteristics of groundwater chemistry,main hydrogeochemical processes and groundwater quality have been discussed in this paper by using the multivariate statistics and hydrochemistry analysis methods.The results showed that the groundwater is weakly alkaline,and its total dissolved solid(TDS)and total hardness(TH) are high,with the average values of 1244.03 mg/L and 492.10 mg/L,respectively.The types of groundwater are mainly HCO_3~--SO_4~(2-)-Ca~(2+)type in the runoff area and Cl~--SO_4~(2-)-Na~+type in the catchment area.Rock weathering and ion exchange are the main controlling factors of regional groundwater chemistry,followed by evaporative crystallization,and human activities have less impact on groundwater.The spatial difference of groundwater quality is obvious,the water quality of the catchment area is not suitable for drinking,and the suitability for plant growth is also poor.The groundwater in the runoff area can be used for drinking,but the hardness is slightly higher,which is more suitable for ecological purpose. 展开更多
关键词 HYDROCHEMISTRY GROUNDWATER WATER QUALITY assessment Sugan Lake Basin WATER QUALITY Tibet
350 MW机组凝结水溶氧量超标的治理 认领
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作者 万大报 《重庆电力高等专科学校学报》 2020年第2期14-17,共4页
结合国产350 MW超临界机组凝结水系统运行方式及设备特点分析溶氧超标的原因,逐项排查可能导致凝结水溶氧超标的原因,通过对凝结水泵机械密封水系统进行改造和运行方式调整降低溶氧水平。改造后,在各种负荷工况下,凝结水溶氧始终保持在1... 结合国产350 MW超临界机组凝结水系统运行方式及设备特点分析溶氧超标的原因,逐项排查可能导致凝结水溶氧超标的原因,通过对凝结水泵机械密封水系统进行改造和运行方式调整降低溶氧水平。改造后,在各种负荷工况下,凝结水溶氧始终保持在10μg/L以下,优于国标对超临界机组凝结水溶氧要求(20μg/L),机组给水溶氧降至3μg/L以下,保障了机组长周期安全可靠经济运行。 展开更多
关键词 凝结水 溶氧 水质 机械密封水
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干挖法清淤对湖区垸内沟渠地表水环境质量的影响 认领
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作者 瞿畏 龚丽玲 +3 位作者 范庆元 刘辉 杨楠 陈宏 《江西水利科技》 2020年第3期162-167,共6页
干挖法清淤是改善湖区垸内沟渠地表水环境质量的重要手段,本文通过现场调研与采样分析了南汉垸内沟渠在清淤前后的地表水水质及其变化特征,评价了沟渠地表水环境容量及其富营养化水平.结果表明:1)沟渠采用干挖法清淤后,地表水质随清淤... 干挖法清淤是改善湖区垸内沟渠地表水环境质量的重要手段,本文通过现场调研与采样分析了南汉垸内沟渠在清淤前后的地表水水质及其变化特征,评价了沟渠地表水环境容量及其富营养化水平.结果表明:1)沟渠采用干挖法清淤后,地表水质随清淤完成时间延长而变差;2)沟渠高锰酸盐指数的水环境容量由清淤前的13.99t/m增加到清淤一个月后的38.88t/m;而总氮、总磷的水环境容量分别增加了2.8倍和2.7倍;3)清淤前垸内沟渠地表水养殖及排污区达到重度富营养化程度,清淤后∑TLI值随清淤完成时间增加呈增加趋势.南汉垸内农业面源与养殖排污的外源输入是导致清淤后水环境质量变差的主要原因,有必要加强监测并定期清淤.本研究可为沟渠清淤治理中的水环境保护提供依据. 展开更多
关键词 清淤 水环境容量 水质 富营养化评价 干挖法 地表水
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基于雨洪利用的湖体补水削减研究--以北京云景公园为例 认领
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作者 李盼盼 《绿色科技》 2020年第12期42-44,共3页
随着社会化进程的发展,居民对景观公园的要求也越高,公园内景观湖水补水资源短缺造成的水质问题是制约公园环境的一大因素。为此,提出了雨洪利用作为湖体新型补水水源,经工程实践后,全年可削减23%的补水量,减轻了市政水源的压力,为解决... 随着社会化进程的发展,居民对景观公园的要求也越高,公园内景观湖水补水资源短缺造成的水质问题是制约公园环境的一大因素。为此,提出了雨洪利用作为湖体新型补水水源,经工程实践后,全年可削减23%的补水量,减轻了市政水源的压力,为解决湖水补水水源提供了新思路。 展开更多
关键词 雨洪利用 补水削减 水量平衡 水质
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Water Quality of Selected Fishing Beaches of Lake Victoria Kenyan Gulf 认领
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作者 Paul S. Orina David M. Onyango +6 位作者 Henry Lungayia Andrew Oduor Anthony W. Sifuna Petronila Otuya Rosemary A. Owigar Chrispin B. Kowenje Sheban M. Hinzano 《生态学期刊(英文)》 2020年第1期22-35,共14页
Lake Victoria the second largest fresh water body in the world located in East Africa is a shared resource between Kenya, Tanzania and Uganda and enjoys a wide range of streams and rivers from as far as Burundi and Rw... Lake Victoria the second largest fresh water body in the world located in East Africa is a shared resource between Kenya, Tanzania and Uganda and enjoys a wide range of streams and rivers from as far as Burundi and Rwanda. The lake has environmentally undergone physical, chemical and biological changes in the last four decades, particularly rise in its trophic condition and decline in oxygen level, which affects the water quality and fish population dynamics. This study therefore set out to determine the quality of water in selected fishing beaches of Lake Victoria, Kenya with a view to report the possible pollution levels. pH was highest at Nyamasari and Kotieno (9.3 ± 0.1) and lowest at Nyachebe and Kichinjio (7.08 ± 0.1) whereas temperature was highest at Nyamasari (29.5&#176;C ± 0.0&#176;C) and lowest at Kichinjio (23.4&#176;C ± 0.2&#176;C). DO was highest at Kotieno (10.3 ± 0.2 mgL) and lowest at Seka (2.4 ± 0.1 mgL). Turbidity was highest at Uyoga (125.5 ± 0.90 NTU) and lowest at Osieko (2.7 ± 0.1 NTU). Ammoniacal nitrogen was highest at Dunga (1278.3 ± 0.8 μ&#8729;gl-1) and lowest at Nyamasari (12.4 ± 0.8), all a factor of human activities, lake substratum and effluents from rivers and surface runoff. All parameters assessed showed significant differences across sampling sites and depth except pH which did not vary significantly with distance from lakeshore. Further, all parameters did not show a clear pattern with respect to distance from the lakeshore possibly due to adequate mixing in the gulf. There is a need for further water quality monitoring by seasons to inform policy decisions towards sustainable lake exploitation. 展开更多
关键词 Water Quality POLLUTION Human Activities Sampling SITES Lakeshore
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