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1.
Comparison of metal(loid) concentrations in water, sediments and fish from two large shallow lakes 总被引：2，自引：0，他引：2
J. Zeng L. Y. Yang X. M. Chuai X. F. Chen H. Y. Zhao Q. L. Wu 《International Journal of Environmental Science and Technology》2013,10(6):1209-1218
Hulun Lake and Taihu Lake are both large shallow lakes in China. In summer and winter of 2009, water, sediments and fish samples were collected from the two lakes and the concentrations of metal(loids) were analyzed. The results demonstrated that aqueous concentrations of arsenic (As), chromium (Cr), cadmium (Cd), nickel (Ni) and copper (Cu) in Hulun Lake were significantly higher than those in Taihu Lake. Especially, the As concentrations (about 130 μg/L) in Hulun Lake dramatically exceeded the permissible level of drinking water. Compared with Taihu Lake, metal(loid) concentrations in the sediments of Hulun Lake were significantly lower, which might have less impacts on the metal exchanges between water and sediments. In contrast, concentrations of the measured metal(loids) (including As) in fish from Hulun Lake and Taihu Lake were comparable, suggesting that the dramatic difference in aqueous and sediment metal(loid) concentrations had less influence on the metal(loid) bioavailability. The higher concentrations of dissolved organic carbon (DOC) and cations (e.g., Na+, K+ and Mg2+) in lake water might contribute to the reduced metal(loid) bioavailability to fish in Hulun Lake. 相似文献
2.
根据中国东部浅水湖泊受人类活动影响较严重的情况,将季节分解的非参数局部线性回归模型、频率分析和几何分块自助法有机结合,提出了一种基于非参数方法的湖泊参照状态确定的新方法。该方法首先将季节分解模型用于湖泊营养盐及其响应物的观测值,选取出适合用于推断参照状态的时间段;其次使用频率分析法分析此时间段内的观测值,并给出湖泊总氮、总磷和叶绿素a的参照状态值;最后用几何分块自助法给出各自的置信区间。该方法能有效克服前人提出方法的缺点。以太湖为例,采用该方法推断了参照状态浓度,总氮为0.78mg/L,总磷为0.030mg/L,叶绿素a为2.63μg/L;给出相应的95%置信区间分别为0.57~0.83mg/L、0.025~0.046mg/L和1.86~2.65μg/L。该方法也可适用受人类活动影响较大的中国东部其他浅水湖泊。 相似文献
3.
长江中下游不同类型湖泊沉积物营养盐 蓄积变化过程及其原因分析* 总被引：7，自引：10，他引：7
在长江中下游的洪湖、太湖、巢湖采集了沉积柱样,测定了总有机碳、总氮、磷,并采用210 Pb和137 Cs定年。洪湖1950年以来沉积物中营养元素急剧增加,巢湖在20世纪70年代以来营养元素开始增加,而在太湖中则为80年代。结果表明草型湖中有机质增加比藻型湖迅速,洪湖湖泊沉积物有机质迅速增加与围垦活动开始时间一致。沉积物中总磷的变化不如总有机碳、总氮的变化规律性明显。洪湖两钻孔总磷背景值为0.7~0.8g/kg,太湖钻孔其总磷本底为0.6g/kg,梅梁湾大量钻孔表明总磷本底在0.5g/kg;巢湖的则更低。对比湖泊类型来看,目前为藻型湖的沉积本底磷偏低,而目前为草型湖的沉积本底磷偏高,这可能与不同生态类型湖泊营养元素的生物地球化学循环与积累的方式有关。 相似文献
4.
Integration of monthly water balance modeling and nutrient load estimation in an agricultural catchment 总被引：1，自引：1，他引：0
P. Tian G. Zhao J. Li J. Gao Z. Zhang 《International Journal of Environmental Science and Technology》2012,9(1):163-172
Non-point sources pollution has become a serious environmental problem in the aquatic systems throughout the world. The Xitiaoxi catchment is located in the southwest of Taihu Basin, contributing large amounts of runoff and associated nutrients to Taihu Lake. Thus, identifying critical non-point sources pollution in this catchment is urgent and essential to control water pollution, improve the water quality, and reduce the pollutants drained into water bodies. The present study integrated a monthly water balance model with the export coefficient model for total nitrogen and total phosphorus loads estimation in the Xitiaoxi catchment in southeastern China. The simulated monthly runoff are in good agreement with the observed streamflow at both Hengtangcun and Fanjiancun stations with Nash?CSutcliffe coefficients higher than 0.80. The predictions showed reasonable ranges from 1687 to 2046?t/y (2002?C2005) for total nitrogen loads, and from 106 to 157?t/y for total phosphorus loads (1999?C2007), respectively, which are consistent with the observed values at Hengtangcun. Overall, the monthly export coefficient model coupling monthly water balance simulation to export coefficient model presented both the seasonal dynamics and magnitude for streamflow and nutrients loads, which generally match well with the observations. These findings demonstrate that the proposed model can provide encouraging results and can be used as an efficient tool to identify the pollution sources for planning and management of large-scale agricultural catchment. 相似文献
5.
太湖水体氮、磷赋存量的逐月变化规律研究 总被引：5，自引：0，他引：5
基于中国科学院太湖湖泊生态系统研究站2005~2009年对太湖逐月叶绿素a、氮、磷各形态因子及水深的监测,结合太湖大浦水文站的逐日水位数据,估算出2005~2009年太湖的逐日水量,并运用泰森多边形法,估算出太湖水体总氮（TN）、总磷（TP）、溶解性总氮（TDN）、溶解性总磷（TDP）、硝态氮（NO3）、铵态氮（NH4）、亚硝态氮（NO2）、反应性活性磷（PO4）、颗粒态总氮（TPN）、颗粒态总磷（TPP）、浮游藻类叶绿素a（Chla）的逐月动态变化过程。结果表明:（1）太湖2005~2009年TN、TDN、NO2、NO3、NH4、TP、TDP、PO4、TPN、TPP、Chla的平均赋存量分别为1.36×104t、1.02×104t、0.02×104t、0.37×104t、0.25×104t、514.34 t、147.30 t、51.44 t、0.34×104t、367.04 t、7.92 t,不同月份、年际之间变化剧烈,变幅分别为106%、142%、657%、252%、233%、95%、196%、276%、236%、131%、276%;（2）2007年6月无锡贡湖水厂"饮用水危机"事件之后,截止到2009年12月,太湖水体各形态氮及总磷赋存量的下降趋势不明显,溶解性总磷、反应性活性磷的赋存量反而增高,反映出营养盐控制任务的艰巨性。本研究表明,对于年水量变幅巨大的大型湖泊,全湖水体营养盐赋存量在评估水体营养盐污染状况中是一个有价值的指标;对于太湖流域的污染控制效果,仅从浓度角度评价具有一定的缺陷,有必要从水体营养盐赋存量的变化规律上探讨其治理效果。 相似文献
6.
长江中下游典型湖泊近代环境变化研究 总被引：7，自引：0，他引：7
选择长江中下游的典型湖泊洪湖、巢湖、石臼湖和太湖,采集了沉积柱样,测定了总有机碳、总氮、总磷,并采用210Pb和137Cs定年以研究湖泊近代环境演变。根据洪湖137Cs蓄积峰得到过去50 a里洪湖沉积速率经历了一个由慢到快再变慢的过程,1963~1986年之间沉积速率最大,达0.174 cm/a,这可能是因为当时湖区大规模开垦有关。巢湖钻孔核素的研究发现20世纪70年代以来随着深度的减少,巢湖钻孔中沉积通量在增加,可能与流域内水土流失逐步加重有关。对营养盐的分析表明,洪湖50年代以来沉积物中营养元素急剧增加,巢湖70年代以来营养元素开始增加,在太湖中体现为80年代,石臼湖中则为近百年来营养元素开始快速增加。从营养盐增加的幅度来看,草型湖的洪湖、石臼湖要大于藻型的巢湖以及太湖藻型区域。本文尝试利用总有机碳、总磷获取了湖泊环境变化的速率。研究表明总有机碳和总磷的变化速率存在波动性,这可能与湖泊的自我调节有关。而总有机碳的变化速率在最近时间阶段内基本呈正值,对于洪湖来说在80年代初,石臼湖在1970年左右,太湖在80年代初,巢湖在60年代。总有机碳、总磷变化速率的振荡幅度与周期也许对理解当今湖泊处于何种位置,由此采取何种湖泊管理手段提供重要认识。 相似文献
7.
2002～2005年在长江中下游的洪湖、固城湖和太湖分别采集了沉积物柱样钻孔,测定了总有机碳（TOC）和金属元素包括Pb,Al,Fe,Ti等,并采用210Pb和137Cs进行了近代沉积物定年。研究结果表明,洪湖钻孔平均沉积速率为0.15cm/a,固城湖平均沉积速率在0.067cm/a,太湖平均沉积速率为0.35～0.41cm/a。根据湖泊沉积物中铅元素与参考元素（Al,Fe和Ti）浓度和TOC的相关关系建立了回归方程,线性关系极显著（p<0.001）。根据回归方程获取了钻孔中铅的背景值变化,研究表明近代沉积物中金属铅不仅仅来源于自然的作用,而人类活动导致铅的累积发生时间都在20世纪70年代,从一个侧面也说明利用沉积物铅含量变化进行断代存在可能性。对太湖钻孔而言,其污染程度要高于洪湖和固城湖。研究结果表明近30年来洪湖和固城湖人为造成湖泊沉积物铅累积量在不断增加,其沉积物铅污染有进一步加重的趋势,应受到科学家和管理部门的关注。 相似文献
8.
通过对2007~2010年环太湖水文巡测及降水调查,进行了湖体总氮平衡分析,在充分调查现有与规划的各类型污染源总量控制工程措施的基础上,量化出具有空间分布的流域总氮污染削减率,利用构建的太湖流域及湖体水环境数学模型模拟污染削减后的太湖湖体总氮浓度场,并提出水质可控目标。结果表明:太湖出入水量共127.8亿 m3,其中通过降水进入太湖的水量为24.9亿 m3,占入湖总水量的19.5%;全年总氮收支量达到4.47万t,其中通过干湿沉降进入太湖的总氮量为0.70万t,占入湖总通量的15.5%,可见干湿沉降进入太湖的污染物不容忽视,其变化趋势与太湖地区降水特征相关性较好。同时通过模型推算,定出2015年太湖湖体不同功能区总氮的可控目标,整个湖体平均值约为2.3 mg/L,为太湖总量控制提供科学依据。 相似文献
9.
J. K. Biswas B. Bera R. Chanda S. K. Sarkar J. Majumdar S. Majumder S. Hazra 《International Journal of Environmental Science and Technology》2018,15(9):1867-1878
Lakes are functionally integral and biologically complex freshwater ecosystems which provide a vast array of ecosystem goods and services to society. Nowadays aquatic ecosystems are being used, misused and abused by diverse anthropogenic activities at an unprecedented rate. The management of lake water quality is usually directed to resolution of conflicts between maintenance of desirable water quality and human-induced degradation of aquatic environment. Nutrients play a decisive role in determining lake’s environmental state through regulation of its primary production. The present study on Saheb Bundh Lake located in Purulia District, West Bengal, India, was undertaken to assess the status of nutrients (nitrogen and phosphorus) subject to certain anthropogenic activities, and to construct models using best subset method which could be adopted as a nutrient management tool. The water samples were monitored for different physicochemical parameters adopting standard methods. It was found that the set of variables including turbidity, temperature, pH, redox potential and total hardness has been championed as the best subset of water quality explaining the dynamics of total phosphorus concentration of freshwater Saheb Bundh Lake. The suite of factors comprising dissolved oxygen, pH, temperature, turbidity and total hardness has been proved as the best subset for estimating total nitrogen concentration. The models developed have been validated for total phosphorus and total nitrogen concentration. For total phosphorus, the model values were found to be very close to the measured values but the values varied widely for total nitrogen, championing the former as a very potent down-to-earth model. 相似文献
10.
水深作为重要的湖泊水文因子,对湖泊水动力过程、化学过程和生态过程具有重要的影响。通过对1993-2002年太湖水深水质实测资料的回归分析,建立了太湖7个分区的水深与总氮、总磷、叶绿素a浓度的回归方程。结果表明,叶绿素a浓度对水深变化的响应并不显著。一般情况下,水深变化对营养盐浓度的影响不显著,但在特定的湖区,如梅梁湾,水深变化对营养盐浓度的影响显著。鉴于水深变化可以对太湖局部区域的水环境具有显著的影响,因此存在通过太湖流域水利工程的联合运行,人为调控特定湖区水深,在一定程度上改善水质的可能性。 相似文献
11.
Detection of algal bloom and factors influencing its formation in Taihu Lake from 2000 to 2011 by MODIS 总被引：1，自引：0，他引：1
Changchun Huang Yunmei Li Hao Yang Deyong Sun Zhaoyuan Yu Zhuo Zhang Xia Chen Liangjiang Xu 《Environmental Earth Sciences》2014,71(8):3705-3714
Time-series MODIS data were used to extract and characterize algal blooms from the Taihu Lake study area. Water quality data including total nitrogen, total phosphorus, and dissolved oxygen; local meteorology data; and global climate trends were examined to reveal the factors influencing the formation of the algal blooms. Results for the 2000–2011 study period show that the annual algal bloom typically begins between March and May in Taihu Lake. All large-scale blooms originate from northern Taihu Lake (Meiliang Bay and Zhushan Bay). Some small-scale blooms originate from southwestern Taihu Lake, but the duration of these blooms is very brief because of episodes of turbulent mixing due to high wind speed. Nutrient supply is the main factor influencing algal mass propagation during bloom periods, and temperature changes may trigger algal recovery. The algal bloom area significantly decreased when wind speed is greater than 4 m/s, causing turbulence and changes in algal buoyancy. A strong East Asian summer monsoon transporting warm air to the lake is shown to extend the duration of algal blooms in Taihu Lake, as occurred in 2007. 相似文献
12.
选择长江中下游49个湖泊进行不同季节的水体溶解无机氮(DIN)、总氮(TN)、总磷(TP),溶解性无机磷(DIP)以及叶绿素a(Chla)等环境参数分析,开展不同营养水平湖泊水体环境变化特征及生物响应机制研究。结果表明:DIN、TN/TP随TP的变化规律反映了不同营养水平和季节下地球化学作用的影响;氨氮(NH4-N)、TP、DIP、Chla尤其是NH4-N的季节性变化规律与营养水平关系密切;TP<0.05 mg/L时,NH4-N随总磷升高的趋势夏季大于其他季节,TN/TP与硝态氮(NO3-N)、TN相关性好,营养源组成和氨化作用是主要影响因素;0.05 mg/L4-N随总磷升高的趋势基本相同,TN/TP与亚硝态氮(NO2-N)、NO3-N、TN相关好,水生植物利用、氨化和反硝化作用是主要影响因素。TP>0.1 mg/L,冬季NH4-N随总磷升高的趋势明显大于其他季节,TN/TP在冬季和春季与TN、NO3-N相关性好,夏季和秋季与TP相关性好,其主要原因在于夏季和秋季水生植物对DIN的利用量、反硝化作用和湖泊内源释放的显著增强。 相似文献
13.
Total organic carbon (TOC), Total nitrogen (TN) and the phosphorus species concentrations of sediment cores taken from Zhushan Bay, Meiliang Bay, and East Taihu Lake regions in Taihu Lake, a large shallow lake in China, were determined. Experimental results showed a conspicuous eutrophication trend in the northern area of Taihu Lake. Inorganic P was found to be the main phosphorus form. Fe-bound P accounted for the largest proportion of Inorganic P in Meiliang Bay, an alga-type lake region. In East Taihu Lake, a macrophytic lake region, Ca-bound P was found in higher proportions than in other lake regions, with Organic P present in similarly large proportions. With respect to Taihu Lake sediment cores, the date at approximately 20 cm layer depth was roughly identified as 1950s, while upper 5 cm layers corresponded to the turn of the century. The drastic increase in phosphorus species concentration except for Ca-bound P was indicative of the large quantities of effluent discharge into Zhushan Bay owing to the increased industrial and agricultural production from the 1950s onwards. TN, Inorganic P, Organic P, and total phosphorus (TP) concentrations increased by over 2, 2.5, 2 and 2.5-fold, respectively, over the past five decades. A large proportion of Organic P accounted for TP, and high C/N ratios indicated that East Taihu Lake can be properly classified as an oligotrophic lake. 相似文献
14.
依据1989年至2019年云南大理地区所辖12个气象站点的气候数据和洱海水质监测资料等文献,分析大理地区气候变化特征和洱海富营养化变化趋势,并总结洱海水质综合营养状态指数与降水量、气温的相互关系。结果表明,1989年至2019年期间,大理地区的年平均气温呈波动上升趋势,气候变暖明显,冬季气温升温幅度最大;年降水量总体呈波动下降趋势,秋季降水量减少最为显著。洱海水质的综合营养状态指数及单因子总氮、总磷、高锰酸盐指数等总体呈升高趋势,而水体透明度呈降低趋势;进一步可分成2个阶段,即2003年之前呈快速上升或下降变化趋势;2003年之后呈波动稳定趋势。洱海综合营养状态指数与年平均气温呈正相关,与年降水量呈负相关关系;总氮、水体透明度分别与年平均气温正相关和负相关,与年降水量则呈负相关和正相关;而总磷与冬季平均气温、高锰酸盐指数与夏季或冬季平均气温均呈正相关关系。年内变化上,洱海污染指数、综合营养状态指数在最近的2015—2019年期间呈现6—10月份明显增高,显示非汛期水质明显好于汛期状况。总之,1989—2019年期间,受大理地区气温升高、降水量减少导致入湖水量减少的影响,洱海综合营养状态指数呈升高趋势,湖泊富营养化进程加剧状况没有得到改善,洱海水环境仍然比较脆弱。 相似文献
15.
Impact of aquaculture on eutrophication in Changshou Reservoir 总被引：1，自引：1，他引：1
1INTRODUCTION EUTROPHICATIONCANBEUNDERSTOODASAPHENOME NONOFTHEENRICHMENTOFNUTRIENTSINAWATERBODY.THE MOSTIMPORTANTNUTRIENTSTHATCAUSEEUTROPHICATIONARE PHOSPHATES,NITRATESANDAMMONIA(CAIQINGHUA,1993;HORNEANDGOLDMAN,1994).THEMOSTPROMI NENTFEATURESOFEUTROPHICWATERSARETHEHIGHCONTENTS OFNUTRIENTSANDTHEABUNDANCEOFPLANKTONSORATTACHED ALGAE.EUTROPHICATIONISACOMMONPHENOMENO… 相似文献
16.
认识流域湖泊水体富营养化的演变和趋势是湖泊污染控制和治理中的重要研究课题。本文将在分析和论证太湖流域营养盐自然本底、人类活动作用急剧增加的近50年来太湖流域营养盐的变化情况、以及全球气候变化和流域经济发展未来30年太湖流域营养盐变化趋势等三方面的基础上,对太湖流域营养盐产量变化做出评估和预测。研究表明,在未来气候变化概率分析和区域经济发展规划基础上,太湖流域未来30年营养盐流域产量将比现代（2000s）增加25%～33%,这将增大太湖水体污染的压力。 相似文献
17.
构建了基于韦伯-费希纳定律(Weber-Fechner Law,W-F)的湖泊富营养化及公众满意度综合评价方法,选取透明度(SD)、高锰酸盐指数(CODMn)、总氮(TN)、总磷(TP)、叶绿素a(Chla)5个评价因子,应用熵权系数法确定各评价因子权重分别为0.124 2、0.176 8、0.214 0、0.203 4和0.281 6,明确了湖泊富营养化综合影响指数Ki值与营养指数之间的函数关系,探讨了将公众对湖泊营养状态的感受与Ki值间建立定量的关系,根据Ki值变化范围、变化率与营养等级的对应关系,将公众对湖泊营养状态的满意度划分为4个等级:优、中、差和很差,以反映公众对湖泊富营养程度变化的响应.并以海河流域典型湖泊白洋淀为例,对方法进行了验证,结果显示:白洋淀Ki值为0.052 3,Ki值变化率为304.67,处于重度富营养化状态.不同空间的8个点位富营养化严重程度排序:南刘庄>圈头>王家寨>光淀张庄>烧车淀>枣林庄>采蒲台>端村.公众对白洋淀8个点位Ki值变化范围确定为0.029 3~0.100 6,营养状况的公众满意程度均为差,富营养状态及对公众的影响存在空间差异. 相似文献
18.
Application of allochthonous organic carbon and phosphorus forms in the interpretation of past environmental conditions 总被引：2，自引：0，他引：2
Changwei Lü Jiang He Huimin Sun Hongxi Xue Ying Liang Saruli Bai Ying Sun Lili Shen Qingyun Fan 《Environmental Geology》2008,55(6):1279-1289
Organic matter in sediments, for instance, carbon, nitrogen and phosphorus, can be used to reconstruct the paleoecological
and pollution history of lakes and their catchment basins. In this paper, the contents of allochthonous organic carbon (allochthonous
OC) and autochthonous organic carbon (autochthonous OC) in sediment cores taken from Wuliangsuhai Lake and Daihai Lake in
northern China are quantified by using a binary model, and phosphorus forms in the sediment cores from the two lakes are extracted
by sequential extraction techniques. The results indicate that the palaeoenvironment and paleoclimate of Daihai Lake and
its catchment basin in the recent 250 years can be well reconstructed based on the content of allochthonous OC. The climate
was relatively humid and warm in the period of 1865–2005, while relatively dry and cold in the period of 1765–1865. The sedimentary
information of allochthonous OC in the 22–42-cm portion of the sediment cores in Daihai Lake corresponds to the final cold
fluctuation of the Little Ice Age that occurred since the Middle Holocene. The difference of phosphorus forms in the sediment
cores between the two lakes indicates that phosphorus input to the lakes and the correlation between phosphorus forms and
distribution and the changes of environment are influenced by the eutrophication mechanisms and environmental conditions of
the two lakes. 相似文献
19.
Correlations between algae and water quality: factors driving eutrophication in Lake Taihu, China 总被引：3，自引：0，他引：3
Y. P. Li C. Y. Tang Z. B. Yu K. Acharya 《International Journal of Environmental Science and Technology》2014,11(1):169-182
Rapid population increase and economic growth in eastern China has lead to the degradation of many water bodies in the region, such as Lake Taihu, the third largest freshwater lake in China. Using data from recent investigations, the correlations between algae (measured as chlorophyll-a) and water quality indices in Lake Taihu were described by multivariate statistical analyses, and the key driving factors for the lake eutrophication were identified by principal component analysis. Results revealed strong spatiotemporal variation in the correlations between algae and water quality indices, suggesting that the limiting factor for the dominant algae growth depends on seasonality and location and it is necessary to reduce both nitrogen and phosphorus inputs for a long-term eutrophication control in this hyper-eutrophic system. Water temperature was another important controlling factor for algal growth in the lake. Using principal component analysis, nutrient contaminations from anthropogenic and natural inputs were identified as the key driving factor for the water quality problems of the lake. Moreover, five principal components were extracted and characterized with high spatial and seasonal variations in Lake Taihu. The key driving factors were believed to influence spatial variations including heavily polluted areas located in the northern and northwestern parts of the lake, where many manufacturing factories were built and wastewater from domestic and industrial plants was discharged. Based on this analysis, attention should be paid to effective land management, industrial wastewater treatment, and macrophytic vegetation restoration to reduce the pollutant loads and improve water quality. Principal component analysis was found to be a useful and effective method to reduce the number of analytical parameters without notably impairing the quality of information in this study. 相似文献
20.
太湖东部湖湾水生植物生长区底泥氮磷污染特征 总被引：6，自引：0，他引：6
为了解太湖东部湖湾(贡湖湾、光福湾、渔洋湾)表层底泥中氮、磷的污染特征及其与水生植物生长的关系,采集了各湖湾滨岸带水生植物生长区的表层底泥,探讨了水生植物的生长与分布对表层底泥中总氮(TN)、总磷(TP)及总有机碳(TOC)等含量的影响,并对表层底泥进行营养评价.结果表明,水生植物生长密集区底泥中TN、TP、TOC的含量均显著低于水生植物零星生长区,说明水生植物的生长对太湖东部湖湾表层底泥中营养盐与有机碳含量具有较为明显的影响;相关性分析显示,表层底泥中TOC与TN含量呈显著相关性(R2=0.832 8),而与TP的相关性则较弱(R2=0.166 5),反映了TOC在湖泊底泥中的沉积可能成为湖泊氮的重要来源,而对磷的影响较小.利用有机指数与有机氮指数两种方法分别对东部各湖湾底泥进行污染评价,贡湖湾、光福湾、渔洋湾底泥有机指数平均值分别为0.142 7、0.228 6与0.208 6,均属较清洁与尚清洁水平,而各湖湾有机氮指数平均值均为Ⅲ与Ⅳ级,说明底泥已遭受了一定程度的氮污染.因此,对水生植物零星生长区表层底泥中氮含量的控制与削减有利于湖泊富营养化的预防与治理. 相似文献