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从城市供水角度来讲,水资源质量是满足用水要求、作为确定供水水源及水用途的一个重要内容。本文研究对象为北安市市区内城市供水目的水层一白垩系裂隙孔隙承压水。根据研究需要,在该区不同位置取18套水样进行水质常规分析,并对其物理、化学特征进行分类总结,通过生活饮用水、工业用水、农业用水等3个方面对其水质进行评价。 相似文献
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介绍了以城市饮用水的水质监测与评价为目标,Flex Viewer为框架,综合运用WebGIS,Flex,WebService,水质评价模型等技术进行开发的城市饮用水水源地水质监测评价系统。该系统具有地图服务、水质监测、水质评价、统计等功能,监测饮用水源地水质及其变化状况,进行水质评价生成专题图,方便专业人员和社会公众对水质监测成果的直观了解。 相似文献
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泉城济南的城市供水是石灰岩岩溶地下水,每天的开采量达80万米~3。由于超量开采,造成了水位下降,泉水断流,水质污染的局面,泉城受到了“水荒”的威胁。本文根据多年监测资料,叙述了济南地区环境水文地质现状,并提出了保护泉水的措施。 相似文献
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荆泉水源地是鲁南滕州市唯一城市集中供水水源地,其含水层岩性为寒武、奥陶系碳酸盐岩,位于一个独立的地下水含水系统之中,水量丰富,水质良好。由于城市人口增加和工业发展,对荆泉水源地地下水开采量逐年增加,加之上游地区工业污水的超标排放,使该水源地水环境变差。为了保护好荆泉水源地地下水环境,应通过建立水质保护区、合理调配水资源、对荆河河道进行整治等多种综合治理措施,以确保荆泉水源地向滕州市的城市供水需求 相似文献
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本文通过对大同盆地内集中供水水源地进行调查取样分析,参照分析结果对所取水样地下水水质与污染状况进行评价,对地下水污染成因分析可知大同盆地区供水水源地地下水均存在不同程度度的污染,污染成因主要与其所处区域特定的地质环境和区内密集的人类工程活动有关。 相似文献
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该文给出了Q型聚类分析的原理和计算方法,并结合清凉泉水源地的污染问题进行了研究。通过长系列的水质监测资料,查明了清凉泉水源地水质动态变化特征,并对特征污染因子进行了聚类分析,基本查明了清凉泉水源地的污染途径,得到了较满意的结果。 相似文献
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本文重点概述了川西滇北地区 ,西线调水河流的地理背景 ,河水矿化度、化学类型与河水硬度等水质特性以及该区河流水环境与水体污染分析评价。旨在促进引水区调水前期工作的节水、治污和生态环境保护的科学监测预报. 相似文献
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Dynamic and thermohaline properties of the Mindanao Undercurrent, part II: Thermohaline structure 总被引：2，自引：0，他引：2
Hydrographic data from eleven 1986–1991 cruises at zonal sections near 8°N from the Philippine coast to 130°E were used to
examine thermohaline structures and water mass properties of the western boundary currents there, especially those of the
Mindanao Undercurrent (MUC). The finding that the MUC consisted of two water masses with salinity of 34.6 at 26.9 σt and 34.52 at 27.2 σt which were remnants of the lower part of the Southern Pacific Subtropical Water (SPSW) and of the Antarctic Intermediate
Water (AAIW) of South Pacific origin, respectively, showed that the MUC was not a local transient but originated elsewhere.
As the MUC flowed from 7.5°N to 8°N, part of it carrying the SPSW turns anticyclonically and eastward. The Northern Pacific
Intermediate Water (NPIW) often joins the MUC, which suggests that the NPIW carried by the MC partly returns northward as
a result of the shear between the MC and the MUC or other processes. The shear instability provides the energy for the irregular
fluctuation of the MUC.
Contribution No. 3256 from the Institute of Oceanology, Chinese Academy of Sciences.
Project 49176255 and 49706066 supported by NSFC, and also by Foundation of Post-doctoral Research. 相似文献
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The data from the Southern Ocean observations of World Ocean Circulation Experiment(WOCE) are used for analysis and illustration of the features and spatial distributions of Circumpolar Deep Water(CDW) in the southern Indian Ocean.It is learnt from the comparison among the vertical distributions of temperature/salinity/oxygen along the 30°E,90°E and 145°E sections respectively that some different features of CDW and the fronts can be found at those longitudes,and those differences can be attributed to the zonal transoceanic flow and the merizonal movement in the Circumpolar Deep Water.In fact,the zonal transoceanic flow is the main dynamic factor for the water exchange between the Pacific Ocean and the Indian Ocean or between the Atlantic Ocean and the Indian Ocean,and for the effects on the spatial distributions of the physical properties in CDW. 相似文献
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黄甫 《广东海洋大学学报》1997,(1)
布站监测了城月河──雷州湾30多种水质化学要素，探讨各化学要素的变化规律，求出多种化学要素的回归方程，计算不同河段平均每kmCODMn自净百分率，得出CODMn随流程的回归方程和距离自净速率常数，分析、解释了多种化学要素间的相关关系及自净作用原因和机理。 相似文献
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The functional relation between ion concentration in water vapor chemistry and the bond parameter in quantum chemistry 总被引：1，自引：0，他引：1
顾宏堪 《中国海洋湖沼学报》1997,15(1):88-91
ImODUcrION'Watervaporchenhatry"asanewsdencewasestablisedbyGu'slaboratorybasedontheirdiscoveryoftheruleof'witCr-watervaporconstanttransferoftracemetalionsinthenaturalwaterCyde';andwasprovedbyamodelexperimntofsea-airtransfer(Gu,l988,l99l,Gueta1.,l982,l986).Thertilehasnotorreationwiththethermody-nawhrsofthetracephySicochdricalsyStem(Gu,l99l,Guetal.,l984).ThispaperpresentSthefuflctionrelating'witCfvaporchedtry"ionconamtrationtothe'huantumchedtry"bondparametCr.FUimONThedatausedinthecurvea… 相似文献
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采用室内池子多层笼养殖方式 ,以加工海带、鲜江艹离 与 A,B2种片状饲料为饵料 ,试验了不同食物与不同放养水层对九孔鲍生长影响 ,结果表明 :( 1)从壳长增长上 ,海带与饲料 B近似 ,各为 11.3与 11.2 mm;其次为饲料 A,10 .2 mm;而江 艹离 最差 ,仅 7.7mm;( 2 )在体重增长上 ,以饲料 B最高 ,平均每只为 3.3g,其次为饲料 A与海带 ,平均每只 2 .9g,而江艹离 仅 1.8g;( 3)从试验期间所获体重增长比壳长增长看 ,两种饲料 ( B为 2 95,A为 2 84 mg/mm)均比两种海藻高 (海带为 2 57,江艹离 为 2 34mg/mm) ;( 4 )从垂直 11层笼子九孔鲍生长的比较 ,下层的好于上层 ,越是下层越好 ,投喂两种饲料在体重上差别更明显。 相似文献
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INTRODUCTI()NThenorthwardflowingMUCbelowtheMCwasfotmdandnamedbyHuandCui(1989,l99l)usinghydrographicdataofOctoberofl987and1988gatheredddringtheChineseAcademyofSCiencesmtilti-institutionalpro~onAirSeaInteractionintheWesternTropicalPacificandIntemalCliInaeChange(CAS)-Recently,WangandHu(l997,hereinafer,wn)eednedtheMUCdrodricstmctUreusinghydrOgraPhicdataof1lcmisesconductedatnear8"NzonalsectionsbytheCASprograrnandthePRC-USJointProgramonAir-SeaInteractionintheWestemEqUatorialP… 相似文献
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Characteristics and formation causes of Qingdao Cold Water Mass 总被引：2，自引：0，他引：2
In this work,the main characteristics of the Qingdao Cold Water Mass were studied by using“the comparison analysis method”based on 1980 temperature,salinity and dissolved oxygen data on the western South Yellow Sea.The formation cause of the water mass was analyzed based on February of 1959 temperature and salinity data for this area and on some other authors’studies.The results showed that the Qingdao Cold Water Mass has growing and vanishing processes：appears in the last ten days of March;has stable pattern in April;is biggest in its area in May;becomes small in its area in June;vanishes in July.It comes from the northem Shandong Coastal Water and is characterized by low temperature and salinity and high disolved oxygen.The mass is formed under the joint effects of anticyclonic circulation and solar radiation. 相似文献
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受当地地热条件的控制 ,温州地区较多地存在温度>20℃的地下低温热水。其中可供开发利用的主要为山间谷地及山前沟谷地带的冲洪积层潜水和滨海平原内的孔隙承压淡水。与地表水相较 ,它们具有水温高 ,年温差小 ,水质好 ,无污染等优点 ,可用以发展水产养殖业。从查勘地下热水前景着眼 ,温州地区不具备普遍出现地下中 ,高温热水或热泉的新地质构造活动条件 ,但不排除其个别出现 ,这可以通过对本文提供的“地热异常迹象”加以跟踪调查。 相似文献