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青草沙水源地自投入运行以来,水质的质量,一直是人们迫切关心的问题。本文对上海市青草沙水源地地表水在2010年至2011年的水质状况进行了监测评价。选取了溶解氧、高锰酸盐指数、化学需氧量、五日生化需氧量、氨氮、挥发酚、石油类、总磷和总氮这九个地表水常用指标对青草沙水源地的地表水的水质状况进行了评价,研究结果表明,青草沙水源地在2010~2011年中有机综合污染指数和水质综合污染指数平均值分别为-0.2和0.8,能达到地表水Ⅱ类标准,总氮超过相应类别的标准,但其指标不直接影响到水体功能效应,水体功能没有受到明显损害,但在一定程度上受到总氮污染的制约。 相似文献
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为了解马家沟水库城市饮用水源的水质状况,选择马家沟水库为研究对象,2020-2021年,每月马家沟水库进行水质监测,获取20组有效数据,分析了马家沟水库水质状况。研究结果表明:马家沟水库饮用水源地水质满足GB3838-2002《地表水环境质量标准》Ⅲ类水质限值要求,水质良好。高锰酸盐指数、五日生化需氧量、氨氮、总磷、氟化物呈现强的变异,呈现中等和强的变异系数表明,这些参数受季节影响对马家沟水库水质变化较大。马家沟水库水质综合污染指数总体均保持在0.4~0.7范围,综合污染指数呈现小幅度变化趋于,表明马家沟水库水质全年总体趋于稳定水平。 相似文献
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该文通过对引黄工程主水源万家寨水库、太原市直接水源汾河水库、汾河81 km天然输水河道近5年水质演变情况的分析来预测引黄沿线的水质发展趋势,采用了Professional Water Quality Trend(PWQTrend)软件进行水质趋势预测分析,得知在2005-2009年污染物下降趋势大于上升趋势,即调查区地表水污染趋势已得到改善。尽管汾河水库、万家寨水库能够稳定达到地表水Ⅲ类标准,但随着城镇化步伐的加快,汾河上游宁武、静乐、岚县、娄烦等县城市管网和污废水处理设施建设还相对滞后于经济建设,引黄水质保护仍任重道远。 相似文献
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本文研究了麻江县某河流段上、中、下游三个断面一年四个季度氨氮含量分布特征.研究结果表明,三个断面氨氮含量情况分布为:河段中游>河段下游>河段上游,且均达到《地表水环境质量标准》(GB 3838-2002)Ⅲ类水域标准.进一步分析了氨氮空间分布特征的原因,提出相关防治建议,为河流水质管控提供更多的参考. 相似文献
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《净水技术》2017,(8)
为了解辛安水库的水质状况,对辛安水库进行了年内和年际水质和富营养化评价。水质评价采用单因子评价法、单因子水质标识指数法和综合水质标识指数法,富营养化评价采用卡森指数法和优势种法。评价结果表明,2013年辛安水库水质主要污染物质为有机物指标,无机物指标和有毒污染物指标均在Ⅰ类和Ⅱ类内,水质总体状况介于Ⅱ类和Ⅴ类之间。2009年~2013年每年6月~9月,辛安水库水质总体达到Ⅲ类水标准。2013年辛安水库富营养化水平12月份处于中-富营养化状态,8月份处于重富营养化状态,其余10个月份均处于富营养化状态。近5年辛安水库富营养化情况:2009年属于重富营养化状态;2010年~2013年辛安水库均属于富营养化状态。 相似文献
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为探究化工基地湖库水质主要污染指标,本文通过 2019 年—2020 年期间宁夏宁东基地地表水水质监测结果,利用单因子分析法、Spearman 秩相关系数法、综合污染指数评价法和主成分分析法对主要水质参数变化情况、相关性、主要影响因素及水质污染状况进行评价。结果表明,鸭子荡水库为Ⅲ类水质,人工湖(鸳鸯湖、圆疙瘩湖和南湖)均为劣Ⅴ类水质,随季节均无显著性变化;各湖库主要污染指标为 COD、BOD5和 DO,且鸳鸯湖还受氟化物影响;说明宁东化工基地地表水属于还原性有机物污染,且人工湖受高盐影响。 相似文献
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In this paper, the question of freshwater induced stratification at the mouth of two dam-controlled Greek rivers is addressed. Results from a monitoring program are presented along Strymon River estuary and Nestos River coastal zone, two of the most important freshwater suppliers in the North Aegean Sea. Strymon River flow is man-controlled through Kerkini Dam, while Nestos River discharge patterns depict significant alterations, due to the operation of two hydropower dams. Moreover, a stratification-mixing model was developed based on the water column potential energy ?TOTAL, which accounted separately for the local contributions to stratification (solar heating and freshwater buoyancy) and mixing (wind and bottom shear stresses). The model was run under two different scenarios: a) the influence and the absence of Kerkini Dam for the case of Strymon River, and b) the presence and absence of the hydropower dams for the case of Nestos River. Results show that Kerkini Dam affects the stratification conditions in Strymon River mouth during spring and early summer (April to June), by reducing ?TOTAL by approximately 13%. In Nestos River mouth, the water column dynamics are highly affected by river damming, as ?TOTAL appeared reduced during November to July, by approximately 50.2%. 相似文献
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In order to find the segments of Pinios River which lack the retention capacity of the BOD and nutrient input, the difference of the estimated input and output pollution loads was compared at upstream and downstream clustered areas of a total of 73 segments. Catchment areas ranged from 1 to 11,300 km2. Emissions were always higher than the actual transport, therefore retention was assumed to take place. Specific runoff, percentage of the surface water area and the calculated input of pollution loads (BOD, P, N) varied between the different Pinios River basin catchment areas. The transport to the emission load ratio was different between large and small catchments. The rate of retention among consecutive segments revealed that four lowland segments lacked in their relative retention capacity. 相似文献
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针对冬季长江原水和黄浦江原水的水质情况,通过混凝剂种类、混凝剂投加量、不同混凝沉淀条件几方面对两种原水及其以不同配比混合后原水的处理进行研究。结果表明,聚硫氯化铝(PACS)和聚合硫酸铝铁(PAFS)在处理低温混合原水时比硫酸铝节省投加量,浊度降到最低值时长江原水所需混凝剂硫酸铝的投加量为40~50 mg/L,低于黄浦江原水所需的60 mg/L,两种降速絮凝状态对混合原水处理效果相近,为保证常规处理后水质达标,冬季黄浦江和长江原水混合比例最好不超过3∶7。 相似文献
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赣南钨矿开采已有百年历史,矿区周边河流沉积物重金属污染对水体环境构成威胁。为探究赣南河流沉积物钨的富集、赋存形态及释放规律,本文选择赣南典型钨矿区河流桃江为研究对象,采集桃江丰水期-平水期-枯水期3个水期36个表层沉积物样品进行钨总量的测定,采用BCR三步法和电感耦合等离子体质谱法进行钨的形态分析,运用模拟实验探究沉积物钨的释放规律。结果表明,3个水期表层沉积物中钨的含量变化范围为0.91~159.94mg/kg,均值为25.36mg/kg,其中重金属总量大小顺序为枯水期>丰水期>平水期,且3个水期平均有79.67%的采样点钨含量超出江西省土壤背景值,最高超出39倍;形态分析结果显示,3个水期钨的主要赋存形态均为残渣态,所占比例均值分别为80.38%、91.59%和86.71%,生物有效态占比相对较小,表明目前桃江沉积物中重金属钨生态风险较小。单因子实验结果表明,沉积物中钨在弱酸、高温和NH4 +浓度高的条件下释放量均有所增加,且3个水期钨的释放量大小顺序为丰水期>平水期>枯水期,表明赣南独特的水质环境利于沉积物中钨的释放。 相似文献
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Richard W. Douglas Wayne Menary Philip Jordan 《Nutrient Cycling in Agroecosystems》2007,77(3):199-212
The Oona Water (102 km2) is a tributary of the Blackwater River (1,480 km2), an Irish cross border catchment and the largest of the six influent rivers to Lough Neagh. An intensive investigation into
the magnitude of phosphorus and sediment transfers from field (0.15 km2), farm (0.62 km2) and landscape (84.50 km2) scale sub-catchments showed that total phosphorus transfers were 1.73, 1.82 and 2.50 kg/ha, respectively, during the 2001–2002
hydrological year. Two important features of these data were noted. Firstly, higher transfers from the landscape scale sub-catchment
were related to phosphorus inputs between storm events. These were mainly in the soluble form and maintained the river in
a hypertrophic state during low flow despite there being no major point source discharges in the catchment. A mass P balance
estimate of all domestic wastewater effluents indicated that this is a minor source but may have major impacts at extreme
low flows. Secondly, despite the Oona Water being a grassland catchment the main phosphorus fraction recorded was in the particulate
form (>50%) and strongly correlated with suspended sediments (SSs), manganese and iron during both storm and non-storm periods.
Previous Irish studies have indicated that the main edge-of-field phosphorus transfers from grassland soils are in the soluble
form. While erosive overland flow cannot be ruled out from soils of low permeability in the Oona Water, it is also likely
that soluble P is entrained to equilibrium by manganese and iron rich SSs from multiple sources that will include stream bank
and bed sediments. 相似文献