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Karaouzas I Lambropoulou DA Skoulikidis NT Albanis TA 《Journal of environmental monitoring : JEM》2011,13(11):3064-3074
In this study, nutrients, trace metals and priority pesticide compounds were investigated for the first time in water and sediment samples in streams of the Evrotas River basin (S.E. Greece) from 2006 to 2008. The most important sources of contamination were from the entry of pesticides and nutrients into surface waters and sediments as a result of the intensive agricultural activity as well as from the uncontrolled disposal of olive mill and citrus processing wastewaters. Aquatic risk assessment revealed that all insecticides detected showed high risk, suggesting adverse effects on the stream biota. Among the metals analyzed, Cr, Ni and Ba presented the highest concentrations in sediments, however, due to natural geological processes. Multivariate statistical techniques applied for data compression, exploration and interpretation proved to be useful tools for identifying the most critical pollutants affecting the surface water quality. The findings of this study suggest that the inclusion of streams with small catchment areas into WFD monitoring and assessment programs is essential, especially those of the Mediterranean region. 相似文献
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V. Markogianni E. Dimitriou I. Karaouzas 《Environmental monitoring and assessment》2014,186(8):5009-5026
Degradation of water quality is a major problem worldwide and often leads to serious environmental impacts and concerns about public health. In this study, the water quality monitoring and assessment of the Koumoundourou Lake, a brackish urban shallow lake located in the northeastern part of Elefsis Bay (Greece), were evaluated. A number of water quality parameters (pH, temperature, dissolved oxygen concentration, electrical conductivity, turbidity, nutrients, and chlorophyll-a concentration) were analyzed in water samples collected bimonthly over a 1-year period from five stations throughout the lake. Moreover, biological quality elements were analysed seasonally over the 1-year period (benthic fauna). Statistical analysis was performed in order to evaluate the water quality of the lake and distinguish sources of variation measured in the samples. Furthermore, the chemical and trophic status of the lake was evaluated according to the most widely applicable classification schemes. Satellite images of Landsat 5 Thematic Mapper were used in order for algorithms to be developed and calculate the concentration of chlorophyll-a (Chl-a). The trophic status of the lake was characterized as oligotrophic based on phosphorus and as mesotrophic–eutrophic based on Chl-a concentrations. The results of the remote sensing application indicated a relatively high coefficient of determination (R 2) among point sampling results and the remotely sensed data, which implies that the selected algorithm is reliable and could be used for the monitoring of Chl-a concentration in the particular water body when no field data are available. 相似文献
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Groundwater risk assessment at a heavily industrialised catchment and the associated impacts on a peri-urban wetland 总被引:4,自引:0,他引:4
Dimitriou E Karaouzas I Sarantakos K Zacharias I Bogdanos K Diapoulis A 《Journal of environmental management》2008,88(3):526-538
Industrial and agricultural activities often impose significant pressures to the groundwater quality and consequently degrade wetland ecosystems that depend mostly on subsurface water flow. Groundwater vulnerability and risk mapping is a widely used approach to assess the natural protection of aquifers and the associated pollution potential from human activities. In the particular study, the relatively new Pan-European methodology (COP method) has been applied in a highly industrialized peri-urban wetland catchment, located close to Athens city, to map the intrinsic vulnerability of the aquifer and evaluate the risk potential originating from local land uses. Groundwater analysis results for various parameters, including Phenols, PCBs and nutrients, have been used to validate the vulnerability and risk estimations while a biological assessment occurred to associate the mapping results with the wetland's ecological status. The results indicated that even though the natural protection of the aquifer is relatively high due to the dominant hydrogeologic and geomorphologic conditions, the groundwater pollution risk is considerable, mainly because of the existing hazardous land uses. The water quality of the groundwater accredited these findings and the ecological status of this peri-urban wetland also indicated significant impacts from industrial effluents. 相似文献
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Ioannis Karaouzas Elias Dimitriou Nikolaos Skoulikidis Konstantinos Gritzalis Eva Colombari 《Environmental Modeling and Assessment》2009,14(6):677-689
Ecological (biological and hydrochemical assessment) and hydrogeological (vulnerability and pollution risk mapping) tools
have been combined to assess the ecological quality and hydrogeological vulnerability of an agricultural river basin. In addition,
the applicability of the recently developed vulnerability assessment approach (COP method) in the particular environmental
conditions was tested by comparing its results with hydroecological assessment tools (i.e., pollution metrics). Five sampling
sites were selected and sampled for benthic macroinvertebrates and physicochemical variables during summer and spring. Overall,
sites ranged from moderate to poor ecological quality. The results illustrated that 26% of the study area was of moderate
pollution risk, while 65% was classified as of low and very low risk zones. However, the higher elevation zones where calcareous
rock formations are encountered presented moderate to high pollution risk that was accredited by the ecological quality assessment.
Pollution metrics facilitated from hydrochemical analysis indicated a significant association with groundwater vulnerability,
thus validating vulnerability and risk estimations. This study indicated that the particular groundwater pollution risk mapping
methodology and the water quality assessment indices can be well combined to provide an integrated evaluation tool at a catchment
scale. 相似文献
5.
Kanellopoulos Theodore D. Kapetanaki Natalia Karaouzas Ioannis Botsou Fotini Mentzafou Angeliki Kaberi Helen Kapsimalis Vasilios Karageorgis Aristomenis P. 《Environmental science and pollution research international》2022,29(30):45190-45190
Environmental Science and Pollution Research - 相似文献
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Kanellopoulos Theodore D. Kapetanaki Natalia Karaouzas Ioannis Botsou Fotini Mentzafou Angeliki Kaberi Helen Kapsimalis Vasilios Karageorgis Aristomenis P. 《Environmental science and pollution research international》2022,29(30):45171-45189
Environmental Science and Pollution Research - This study is a first attempt to assess the trace element contamination status in the surface sediments of the Hellenic Seas since the first... 相似文献
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