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1.
富营养深水水库底栖动物群落与浮游生物相关性分析 总被引：1，自引：0，他引：1
底栖动物和浮游生物通过食物网发生复杂的交互作用,是水库生态系统物质循环的重要组分.南湾水库和汤浦水库均为存在富营养化现象的深水水库,具有较长时间的水温分层期.本文选取这两座供水水库为对象,比较其水体营养状态、底栖动物的群落结构、现存量和多样性.通过群落状态指数(IICS)定量评估底栖动物群落状态,并采用PLS模型、Spearman秩相关以及回归图探讨浮游生物各类群密度与IICS的关系.研究结果显示,南湾水库富营养程度高于汤浦水库,寡毛类在南湾水库占据优势地位,摇蚊类在汤浦水库数量上占优.南湾水库以收集者为主,其数量占比远高于汤浦水库.深水水库通常存在较强的热分层,富营养化会加重水库底部的缺氧或厌氧状态,导致底栖动物遭受周期性的缺氧扰动,影响种类多样性和现存量,改变浮游生物类群与底栖动物群落的相关性,因此底栖动物群落与浮游生物的相关性能够提供判断水库富营养化程度的重要信号,进而为水库管理方提供更多有价值的参考信息. 相似文献
2.
B. V. Adamovich T. V. Zhukova T. M. Mikheeva R. Z. Kovalevskaya E. V. Luk’yanova 《Water Resources》2016,43(5):809-817
Variations of the trophic status of lakes Batorino, Myastro, and Naroch were analyzed over a long period of 1978–2013. The lakes form a system of interconnected water bodies with a wide range of trophic states. In the period under consideration, the trophic conditions in the lakes varied from highly eutrophic (Lake Batorino) to oligotrophic (Lake Naroch), making it possible to analyze the long-term changes in the trophic state of the lakes with the use of different variants of evaluating the Carlson index (trophic state index, TSI), to assess the relationship between the three versions of the index with one another, with phytoplankton biomass, and with hydroecological characteristics, such as the concentrations of total N, seston, and organic matter and biochemical oxygen demand. The possibility to evaluate the index by other characteristics, including phytoplankton biomass, was also considered. 相似文献
3.
广东长潭水库富营养化与浮游植物分布特征 总被引：2，自引：1，他引：1
为掌握梅州市长潭水库富营养化状态与浮游植物分布特征,为控制藻类水华暴发提供科学依据,2011年10月至2012年7月,在长潭水库关键断面选取10个监测点,测定水体理化特征、浮游植物种类、丰度等指标,采用营养状态指数(TLI)和Shannon-Wiener多样性指数法对水质污染现状进行评价,并分析浮游植物类群分布特征.结果表明:长潭水库水体富营养状态在4、10和12月处于中营养级,7月份处于富营养级,营养指数从库区中游上游逐渐降低;观测期间共检出浮游植物4门11科16属,通过丰度比较,发现长潭水库以蓝绿藻为优势种,并且季节变化明显,总体表现为7月 >4月 >10月 >12月;藻类多样性指数分析显示,水库水体污染水平为中度,中游和库区(除7月)为轻度污染,与综合营养指数结果一致;长潭水库污染源调查分析结果表明,该水库主要为氮、磷污染,污染源主要为上游禽畜养殖废水. 相似文献
4.
The objective of this study is the assessment of the typology and the trophic relevant water quality parameters in two Mediterranean lakes (Lake Ziros and Lake Kastoria) under the view of the WFD. Lake types were identified based on characteristics specified in Annex II of the WFD, while trophic indexes (OECD, TSI Carlson) were used in order to assess their trophic status. A modified TSI index appropriate for warmer lakes was also applied. According to our results, Lake Kastoria is classified as eutrophic lake with a tendency to hypertrophication while Lake Ziros is a mesotrophic ecosystem with clear signals of eutrophication. Both ecosystems are considered “at risk” of not fulfilling the WFD environmental objectives due to the existence of certain anthropogenic pressures. 相似文献
5.
Aleksandar Ostoji&#x; Svetlana &#x;ur
i&#x; Ljiljana omi&#x; Marina Topuzovi&#x; 《洁净——土壤、空气、水》2005,33(6):605-613
The Gru?a Reservoir (located at 238…269 m a. s. l., volume 64.6 · 106 m3, surface 934 ha, drainage area 318 km2, max. depth 31 m, mean theoretical retention time 22 months) was investigated during the years 1996 to 2001. The obtained values of trophic state parameters (9…200 μg L?1 total phosphorus, 3…99 μg L?1 chlorophyll‐a, and 0.5…2 m transparency) indicate that water of the Gru?a Reservoir is eutrophic according to three types of classification: Carlson, OECD, and Jones and Lee. It was noticed that values of average biomass abundance are large in the Gru?a Reservoir, and they could indicate a richer trophic state. When these indices are cited in connection with parameters of the trophic state, it is apparent that the Gru?a Reservoir can be classified as a eutrophic water on the basis of total phosphorus content of chlorophyll‐a and hypertrophic water with respect to transparency. 相似文献
6.
基于主客观赋权模糊综合评价法的湖泊水生态系统健康评价 总被引：2，自引：0，他引：2
运用湖泊营养状态指数判断湖泊的富营养化状态,并根据湖泊的水质、沉积物和水生生物群落的现状和特点,运用主观赋权法中的层次分析法和客观赋权法中的熵权法结合模糊综合评价法,对长江中游地区江汉湖群37个湖泊的水生态系统进行健康状态评价.对湖泊富营养化的调查结果表明,海口湖处于中营养状态,18个湖泊处于富营养化状态,18个湖泊处于超富营养化状态.湖泊生态系统健康评价的研究结果表明,37个湖泊中,处于健康状况"优"的湖泊只有海口湖,处于健康状况"良"的湖泊有5个,分别为东西汊湖、花马湖、梁子湖、童家湖和涨渡湖,其余31个湖泊均处于健康状况"差"的状态.经过与湖泊营养状态指数的对照,本研究结果表明,由主观赋权的专家评分的层次分析法结合模糊综合评价法对江汉湖群湖泊水生态健康状态的评价效果相比客观赋权的熵权模糊综合评价法更贴合实际. 相似文献
7.
三峡水库典型支流上游区和回水区营养状态分析 总被引：10，自引：3，他引：7
2006年3、5、8月,对三峡水库成库后5条支流的上游区和回水区水质参数及营养因子分布进行了初步研究.研究结果表明,支流高锰酸盐指数范围在1.00-2.50mg/L、COD范围为6.00-26.5mg/L,上游区与回水区有机物含量差异不大,支流目前未受到有机物污染影响.NH_4~+-N范围为0.039-0.367mg/L,各支流含量均为丰水期最大.TN范围在0.58-1.67mg/L,TP范围在0.005-0.133mg/L,支流回水区TN和TP含量均远高于水体发生富营养化的最低限制值,水体存在发生富营养化的风险.大多支流N/P比值处于适宜藻类生长范围.Chl.a浓度范围为0.94-28.9mg/m~3,各支流回水区Chl.a浓度均为5月最大河流回水区Chl.a浓度高于上游区,上游区、回水区Chl.a含量有显著差异.选用修正的Carlson营养状态指数(Trophic State Index)TSI_M法,评价了支流水体营养状态,TSI_M指数范围在36.0-64.2,上游区除龙河、澎溪河5月达到富营养水平外,其余支流均为贫-中营养水平.回水区各支流均达到中-富营养水平.支流回水区营养状态指数均高于上游区,但各支流增加幅度不同.支流回水区水体营养状态明显受三峡水库蓄水水体流速减缓的影响.Chl.a与COD(n=15,P0.01)呈极显著正相关,与其它营养因子无明显相关关系.三峡水库完工后,支流回水区水体流速减缓,富营养化趋势可能加重. 相似文献
8.
The purpose of this study was to measure the phytoplankton production (PP) and bacterial production (BP) simultaneously in seven lakes in the middle Rio Doce basin (southeast Brazil) during the dry and the rainy seasons. Limnological monitoring was conducted from 1999 to 2001 as well as both PP (radioactive carbon fixation) and BP (3H-Leucine incorporation) in four specific depths (100%, 10%, 1% of incident radiation, and aphotic zone). Furthermore, trophic state of the lakes was analyzed, considering the index proposed by Salas and Martino (1991) and Carlson (1977). In general, some parameters increased during the rainy season such as pH, conductivity, chlorophyll and total nitrogen. In the period of 1999/2000, the rain caused PP reduction in the lakes, excepting Carioca and Águas Claras Lake, but in the years 2000/2001, the lakes did not show a similar pattern. In contrast, the rainy season of both years caused an expressive bacterioplankton production enhancing. Using Salas and Martino index, we observed that some lakes were affected by the seasonal runoff, therefore the typologie of these lakes changed from oligotrophic to mesotrophic conditions, otherwise considering the Carlson index all lakes were classified as eutrophic in both dry and rainy seasons. Indeed, Salas and Martino index demonstrated to be more appropriate to determine the trophic status of the lakes. Finally, our data indicate that until now, in spite of the lakes location, protected and unprotected area, the lakes still maintain their natural characteristics. 相似文献
9.
SERWAN M. J. BABAN 《水文科学杂志》2013,58(6):939-943
Abstract Both the conventional and the Carlson trophic state index (TSI) classification methods were employed to assess the eutrophication state of 26 lakes in the Norfolk Broads, UK. The parameters employed were: Secchi depth, chlorophyll a and total phosphorous which had been obtained previously by using Landsat TM imagery, ground reference data and empirical algorithms for the Norfolk Broads (Baban, 1993). The conventional method did not provide sufficient differentiation between the Broads. The Carlson TSI provided sufficient information to differentiate between all 26 Broads. Consequently, using the Carlson TSI information, these Broads were classified into three groups. The classification was based on the relationship between the calculated Carlson TSI of the external phosphorous loading and its influence on the eutrophication process as deduced from the calculated TSI values for the other two parameters. The results were consistent with all the available knowledge and experience concerning these Broads and demonstrated the potential of combining remote sensing techniques and Carlson TSI in eutrophication assessment, ecosystem checking and watershed analysis. 相似文献
10.
应用聚类分析对水库营养类型分类和0—1高指标判别方法 总被引：2，自引：0，他引：2
以聚类中正相(Q)分析方法对19座水库进行了营养类型的分类,并与模糊聚类分析进行了比较。同时,建立了水库营养类型0—1高指标的判别方法。最后,设计了通用的分析和计算程序,并指出水库营养类型分类中还需进—步解决的问题。 相似文献
11.
12.
为了确保震后高层建筑坍塌墙体修复工程的安全性,提出一种高层建筑震后坍塌墙体修复施工安全管理方法。结合主成分分析法与信息熵法对震后高层建筑坍塌墙体修复施工管理的控制特征量进行提取,确定模型评价指标权重;根据加权学习法对坍塌墙体修复的施工进行量化控制;通过灰阶量化评估进行约束参量分析,构建安全管理控制模型;采用管理因素模糊调度算法实现施工安全管理控制,并完成优化决策。通过仿真实验验证坍塌墙体修复施工管理控制的管理效益与累积评价百分率。分析结果表明,采用该方法进行震后高层建筑坍塌墙体修复施工管理控制的管理效益最高可达83.32%,累积管理效果回报率较高,累积评价百分率平均约为75%,能够有效提高施工过程的安全管理效能,确保施工安全。 相似文献
13.
《Limnologica》2017
Eutrophication has become a crucial issue for water resource management in recent years. In addition, reservoir trophic states are varied with environmental and water quality variables. The objectives of this study were to apply the DFA model to examine which water quality variables significantly affect variations of trophic state index (TSI) factors (i.e. total phosphorus (TP), chlorophyll-a (Chl-a), and Secchi disk transparency (SD)) and use classification and regression tree (CART) to determine the trophic states of the Shinmen Reservoir based on the levels of TSI factors during spring 2001–winter 2009. Results showed that the optimal DFA model contained one common trend (the underlying processes influencing trophic states, which can be rainfall intensity or runoff volume) and 7 explanatory variables. Turbidity (TB), pH, and dissolved oxygen (DO) influence concentrations of TP, while ammonium nitrogen (NH3-N), organic nitrogen (O-N), and nitrate nitrogen (NO3-N) control variations of Chl-a, and TB is related to SD. The CART model can specify trophic states only using two dominant driving factors, i.e. TP and Chl-a. The results of the CART illustrated that eutrophication could be occurred in the Shihmen Reservoir if TP is greater than 31.65 μg/L or if Chl-a is greater than 5.95 μg/L while TP concentration is less than 31.65 μg/L. Runoff nonpoint source pollution resulted from heavy storms may be the important factor affecting reservoir trophic states. Establishing vegetative filter strips along the riparian zone may able to effectively reduce this pollution in a reservoir. The integrated DFA and CART serves as good-fit relationships among trophic states, TSI factors, and water quality variables and provide control strategies for managing water quality in the Shihmen Reservoir. 相似文献
14.
Analysis is presented of many-year spectrometric data in the visible band of electromagnetic spectrum collected for the Don R., including the Tsimlyansk Reservoir in 2010–2013 with a period of ~15 days. An algorithm has been proposed for separating spectral brightness coefficient of the rising radiation from water into six categories. A nomenclature scale of the trophic status of water bodies has been constructed. The obtained scale coincides with the nomenclature scales constructed by chlorophyll a concentration for water bodies under different physiographic conditions. The unquestioning advantage of remote sensing methods for assessing water body (WB) trophic status is emphasized, i.e., the possibility to carry out real-time studies within minutes at high representativeness of the results with respect to the examined aquatic ecosystem. 相似文献
15.
ABSTRACTIn this study, we developed a method to assess reservoir-type water source vulnerability (WSV) and adapted the method to the Yuqiao Reservoir (in Tianjin in North China). First, we identified the factors that influence reservoir vulnerability and selected suitable indexes for vulnerability assessment. Second, the CRITIC, AHP and integrated weighting methods were applied to quantify the index weight. Third, the information diffusion method was applied to process the index data. Finally, the vulnerability of the Yuqiao Reservoir was assessed, and the results showed that the vulnerability of the Yuqiao Reservoir is high, with social factors (i.e. the road traffic system, automatic management control system, potential menace in evaluation scope, destructive man-made accidents, emergency management plan, and per capita water consumption) being the main reasons. 相似文献
16.
L. A. Shchur 《Water Resources》2009,36(5):568-576
The structural characteristics of phytoplankton in the water-cooling reservoir at Berezovskaya SDPP-1 (the Bereshskoe Reservoir)
are considered. The character of Willis distribution (species distribution over the number of genera) and the genera-averaged
index showed that the reservoir alga-flora is at the stage of saturation. Depending on the season and the year, the trophic
status of the reservoir varied from a median gradation, eutrophic category, to a very high gradation, hypertrophic category;
the degree of blooming in alga development varied from 2nd initial to 4th intensive. Based on phytoplankton characteristics,
water quality was estimated by the 3rd class, water was classified as satisfactorily clear, weakly polluted, and β-mesosaprobic. 相似文献
17.
新疆玛纳斯县城场地类别模糊综合评定 总被引：4，自引：0，他引：4
采用苏经宇等提出的场地类别模糊综合评定方法对玛纳斯县城的场地类别进行划分。该方法采用多因素综合评定,充分占有判断信息,其结果合理、可靠。为把该方法应用于其他中小城镇及重要场区,简要介绍了该方法的基本原理并详细说明了该方法的计算机过程。模糊综合评定包括了模糊一级评定和二级评定结果。 相似文献
18.
震后建筑火灾涉及因素多,传统评估模型忽略了建筑截面温度变化与建筑形变程度的影响,导致评估准确度较低。为解决此问题,通过模糊数学方法建立震后建筑火灾危险性评估模型。在建立判断矩阵的基础上,获取评估模型权重,确定隶属度矩阵;通过确定震后建筑火灾后截面温度变化评估的因素集与评语集,进行单因素评判,为评估因素集中的因素赋予权重,实现一级模糊评估;再将一级评估结果作为二级评估的单因素评估,结合模糊数学分析完成对震后建筑火灾危险性的评估。实验中以建筑横梁截面温度变化与形变程度为指标,对震后建筑火灾危险性进行评估。实验结果表明,采用所提模型进行危险性评估,震后在发生火灾时建筑结构受到火灾影响,横梁截面温度越高,导致形变程度越大,危险性更高,模拟实验结果与实际情况更加接近,所提模型评估精度高。 相似文献
19.
Evaluation for the ecological quality status of coastal waters in East China Sea using fuzzy integrated assessment method 总被引：5，自引：0，他引：5
This research presented an evaluation for the ecological quality status (EcoQS) of three semi-enclosed coastal areas using fuzzy integrated assessment method (FIAM). With this method, the hierarchy structure was clarified by an index system of 11 indicators selected from biotic elements and physicochemical elements, and the weight vector of index system was calculated with Delphi-Analytic Hierarchy Process (AHP) procedure. Then, the FIAM was used to achieve an EcoQS assessment. As a result of assessment, most of the sampling stations demonstrated a clear gradient in EcoQS, ranging from high to poor status. Among the four statuses, high and good, owning a ratio of 55.9% and 26.5%, respectively, were two dominant statuses for three bays, especially for Sansha Bay and Luoyuan Bay. The assessment results were found consistent with the pressure information and parameters obtained at most stations. In addition, the sources of uncertainty in classification of EcoQS were also discussed. 相似文献
20.