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博斯腾湖富营养化状态水平调查 总被引:1,自引:0,他引:1
通过水质特征和生物学特征的一个水文年规范化实地调查,采用Scirgesew参数分类标准和相关加权综合营养状态指数,对博斯腾湖水体富营养化状态水平进行了调查和评价。 相似文献
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博斯腾湖矿化度现状分析 总被引:11,自引:0,他引:11
博斯腾湖是目前我国最大的内陆淡水湖,近40多年来,博斯腾湖矿化度年际变化经历了好→中→差→中的过程。本文在对博斯腾湖矿化度历史变化和博斯腾湖各区域矿化度分布调查分析的基础上,全面客观的分析了博斯腾湖矿化度的成因。通过对多年数据的分析,建立了矿化度与水位的定量关系模型,并就如何控制博斯腾湖矿化度提出了可行的对策。 相似文献
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2009年8月12—15日,中国环境监测总站刘廷良主任、刘京研究员一行来新疆考察博斯腾湖水质监测情况。新疆环境监测总站站长及巴音郭楞州环保局和监测站领导陪同两位专家进行了实地考察。 相似文献
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辽河铁岭段及其支流水质现状分析 总被引:2,自引:0,他引:2
依据2004年铁岭市环境监测的数据,采用《地面水环境质量标准》GB3838—2002对辽河铁岭段和四大支流的水质进行现状及分析评价。 相似文献
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地表水体中藻类的生长对pH值及溶解氧含量的影响 总被引:17,自引:1,他引:17
论述了水质富营养化后藻类生长对pH值及DO的影响,并对pH的变化给出了定量公式,对水中藻类的生长给出了pH限值。 相似文献
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泸沽湖坐落于川滇交界处,是中国典型高原淡水湖泊。对泸沽湖水质的客观评价对于其规划保护及保护成效评估极为重要。鉴于溶解氧常常成为决定泸沽湖水质类别的唯一关键指标,在综合分析泸沽湖2013—2020年连续8年水环境主要指标变化的基础上,着重分析了溶解氧随季节、年际等的变化情况及其主要影响因素。结果表明,溶解氧浓度及饱和率存在明显的季节和年际波动。其中:溶解氧浓度一般是在春季升至全年最高,夏季末降低,并在秋冬季维持低位;溶解氧饱和率则是夏秋季节最高,冬季最低。溶解氧浓度的季节变化与水温显著负相关,而溶解氧饱和率的季节变化和水温、pH显著正相关;溶解氧浓度及饱和率的年际变化与水质主要指标均不存在显著相关关系。受高海拔低气压影响,虽然采取了大气压和温度补偿校准,但泸沽湖溶解氧浓度仍不易达到Ⅰ类水质标准限值(7.5 mg/L);而优良的水质加之茂盛的水生植被使得其溶解氧饱和率长期处于较高水平,可以达到Ⅰ类标准限值(90%)。因此,在自然环境特征类似于泸沽湖的水质优良高原湖泊,优先以饱和率作为溶解氧的评价指标更为合理。 相似文献
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蠡湖综合整治十年来水环境变化的研究 总被引:1,自引:0,他引:1
对蠡湖2002-2012年湖体水质、富营养化状况和浮游植物种群进行了研究.结果表明,经过十年蠡湖综合整治工程,蠡湖水环境有了显著改善.TN、TP、NH3-N、CODMn和Chl-a浓度分别下降85.2%、70.4%、96.2%、55.3%和81.6%;TLI由70.9降至52.0,水体由中度富营养好转为轻度富营养;浮游植物种群结构有所演变,近二年种群结构呈现明显季节性差异,夏季蓝藻中的微囊藻成优势种,约占整个水体藻类密度的90%以上.蠡湖水质显著改善的同时,藻类水华情况未得到本质好转,在适宜的水文气象条件下易发生藻类水华.建议提高水体透明度,增加水体流动性,为进一步改善蠡湖水环境,乃至改善湖河小流域水环境起积极作用. 相似文献
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15年来,蘑菇湖水库一直处于富营养化状态,但污染物排放总量没有随着城市经济与人口的增加而成比例增加,相对污染物进库勘晓少。本文主要从水质状况、底泥、水生生物三方面入手,分析了蘑菇湖水库富营养化的成因,阐述水体富营养防治对策的同时。提出了蘑菇湖水库治理的建议。 相似文献
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In an effort to assess current and future water quality of the only perennial river in southeastern Botswana, this study presents
water quality monitoring and modeling results for the effluent-dependent Notwane River. The water quality along the Notwane
River, pre- and post-implementation of secondary wastewater treatment, was compared and results demonstrated that water quality
improved after the new wastewater treatment plant (WWTP) went online. However, stream standards for chemical oxygen demand,
total dissolved phosphorous, and fecal coliform were exceeded in most locations and the critical dissolved oxygen (DO) reached
concentrations of less than 4 mg L−1. High dissolved P concentrations and intense macrophyte growth at the impounding ponds and at sites within 30 km of the effluent
waste stream confluence suggest that eutrophication was a function of P release from the ponds. Results of DO modeling demonstrated
that an unpolluted inflow at approximately 10 km downstream of the confluence was responsible for raising DO concentrations
by 2.3 mg L−1, while SOD was responsible for a decline in DO concentrations of 1.4 mg L−1 at 6 km downstream of the confluence. Simulations also showed higher DO concentrations during winter months, when water temperatures
were lower. Simulations, in which the distributed biochemical oxygen demand (BOD) loading from cattle excrement was decreased,
produced nominal increases in DO concentrations. An increase in WWTP BOD loadings to projected 2020 values resulted in a 1.3
mg L−1 decrease in the critical DO concentration. Furthermore, a decrease in treatment plant efficiency, from 94% to 70% BOD removal,
produced critical DO concentrations and anoxia along much of the modeled reach. This has significant implications for Gaborone,
especially if decreased WWTP efficiency occurs as a result of the expected future increase in pollutant loadings. 相似文献
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Modelling the Effects of Inflow Parameters on Lake Water Quality 总被引:1,自引:0,他引:1
Monzur Alam Imteaz Takashi Asaeda David A. Lockington 《Environmental Modeling and Assessment》2003,8(2):63-70
A one-dimensional lake water quality model which includes water temperature, phytoplankton, phosphorus as phosphate, nitrogen as ammonia, nitrogen as nitrate and dissolved oxygen concentrations, previously calibrated for Lake Calhoun (USA) is applied to Uokiri Lake (Japan) for the year 1994. The model simulated phytoplankton and nutrient concentrations in the lake from July to November. Most of the water quality parameters are found to be the same as for Lake Calhoun. To predict probable lake water quality deterioration from algal blooming due to increased nutrient influx from river inflow, the model was run for several inflow water conditions. Effects of inflow nutrient concentration, inflow volume, inflow water temperatures are presented separately. The effect of each factor is considered in isolation although in reality more than one factor can change simultaneously. From the results it is clear that inflow nutrient concentration, inflow volume and inflow water temperature show very regular and reasonable impacts on lake water quality. 相似文献
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通过对乌鲁木齐市柴窝堡湖水质现状及11年水质变化趋势的分析,预测了柴窝堡湖"十二五"水质变化情况。通过综合分析,找出污染成因,并提出对策建议,为区域水环境保护和水体污染防治提供科学依据。 相似文献
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新疆水环境质量监测现状、问题及对策 总被引:1,自引:0,他引:1
水环境质量监测是环境质量监测的重要组成部分,其任务是说清区域水环境质量现状、问题及变化趋势,为环境管理决策提供依据。本文简要介绍了新疆环保系统的水环境质量监测工作现状及存在问题,并提出了相应的对策建议,以期为进一步改进新疆水环境质量监测与管理工作提供参考。 相似文献