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Oil Sands Environmental Management Bibliography

The Cumulative Environmental Management Association (CEMA)partnered with the Oil Sands Research and Information Network (OSRIN) to create the new Oil Sands Environmental Management Bibliography, which includes documents relevant to the environmental management of oil sands development in Alberta. The majority of the documents focus on the mineable oil sands in the Athabasca deposit, though some documents relate to in-situ developments. This bibliography was last updated in November 2014.

Variation in toxicity response of Ceriodaphnia dubia to Athabasca oil sands coke leachates

Year of Publication: 2010

Abstract:
Coke from the Athabasca (Alberta, Canada) oil sands operations may someday be integrated into reclamation landscapes. It is hypothesized that the metals associated with the solid coke may leach into the surrounding environment. Therefore, the main objectives of this study were to characterize the toxicity and chemistry of coke leachates collected from two field lysimeters (i.e. shallow lysimeter and deep lysimeter) over a period of 20 months, as well as from other oil sands coke storage sites. In addition, a batch renewal leaching of coke was conducted to examine the rate of metals release. Chronic toxicity of key metals (e.g. Al, Mn, Ni and V) found in lysimeter coke leachate was evaluated separately. Toxicity test results revealed that whole coke leachates (100% v/v) were acutely toxic to Ceriodaphnia dubia; the 7-day LC50 values were always <25% v/v coke leachate. The deep lysimeter leachate was generally more toxic than the shallow lysimeter leachate, likely because of significantly higher concentrations of vanadium (V) found in the deep lysimeter leachate at all sampling times. Vanadium concentrations were higher than all other metals found in the leachate from both lysimeters, and in the batch renewal leaching study. Furthermore, V found in leachates collected from other oil sands field sites showed a concentration–response relationship with C. dubia survival. Mass balance calculations indicated that 94–98% of potentially leachable V fraction was still present in the coke from two field lysimeters. Evidence gathered from these assessments, including toxic unit (TU) calculations for the elements of concern, suggests that V was the likely cause of toxicity of the deep lysimeter leachate, whereas in the shallow lysimeter leachate both Ni and V could be responsible for the observed toxicity.

Vegetation and soil water interactions on a tailings sand storage facility in the Athabasca oil sands region of Alberta, Canada

Year of Publication: 2011

Abstract:
The relationship between vegetation and soil water was studied on the Syncrude South West Sand Storage facility in the Athabasca Oil Sands region of Alberta, Canada. Soil water and relevant soil chemical and physical properties were measured at the soil surface, as well as above and below the reclamation soil and tailings sand interface, in areas of low and high vegetation cover. The interface between the reclamation soil and the tailings sand acted as a capillary barrier. Water content was highest under low vegetation cover but soil water conditions above field capacity were rare and unlikely to have impacted vegetation. Periods of water stress occurred, where volumetric water content was below wilting point; these periods were of short duration and generally typical of ecosystems in the study area. Differences in surface soil water between the two vegetation covers were attributed to evapotranspiration and/or canopy interception. Differences above and below the interface were attributed to variation in canopy cover at the surface and resulting quantities of water available for percolation through the soil profiles. At the interface of the reclamation soil and tailings sand, water movement was restricted. High and low canopy covers responded differently to precipitation events; low vegetation cover areas had greater fluctuations in volumetric water content at all depths. The occurrence of a capillary barrier effect will need to be accounted for in developing reclamation soil profiles.

Vegetation communities in continental boreal wetlands along a salinity gradient: Implications for oil sands mining reclamation

Year of Publication: 2009

Abstract:
Oil sands mining is a major disturbance to boreal landscapes in north-eastern Alberta, Canada. Freshwater peatlands dominate the landscape prior to mining, but the post-mining reclamation landscape will have wetlands that span a salinity gradient. Little is known about the native vegetation communities in subsaline and saline marshes in the boreal region, yet these communities offer the best potential for reclamation of wetlands after oil sands mining. The overall intent of this study is to provide information on natural wetland communities along a gradient of salinities that can be used to enhance oil sands wetland reclamation. Our specific study objectives were to: (1) characterize environmental conditions of industrial and natural wetlands, (2) characterize vegetation communities (composition and diversity) in these wetlands, (3) and explore how vegetation communities (composition and diversity) may be influenced by environmental conditions. We surveyed vegetation communities and environmental variables in 25 natural boreal wetlands along a salinity gradient and in 10 industrial marshes in the oil sands mining region. We observed an electrical conductivity (EC) range of 0.5–28mScm−1 in the wetlands, indicating that salinity similar to or higher than anticipated for oil sands reclamation is naturally present in some boreal wetlands. We observed low species richness in both industrial and natural wetlands. There were 101 plant species observed in all the wetlands, with 82 species recorded in the natural wetlands and 44 species in industrial wetlands. At the plot level, richness decreased with increasing EC and pH, but increased with soil organic matter. Using Cluster Analysis and indicator species analysis we defined 16 distinct vegetation community types, each dominated by one or two species of graminoid vegetation. In general these communities resembled those of boreal or prairie marshes. Electrical conductivity, pH, and water depth were important factors correlating with community composition of the wetlands, however peat depth and soil organic content did not differ among community types. Not all community types were present in industrial wetlands, indicating that these communities may need to be planted to enhance overall diversity in future reclaimed oil sands wetlands.

Vegetation community development of reclaimed oil sands wetlands

Authors Cooper, N. J.
Year of Publication: 2004

Abstract:
"Naphthenic acids" comprise a group made up of hundreds of chemically and structurally related alkanoic compounds, which are natural components of bitumen. They are believed to be the main cause of acute toxicity of bitumen processing wastewaters, but also have commercial applications. The naphthenic acids distributions of extracts from several Athabasca oil sands ores, tailings ponds, as well as commercial mixtures were analyzed by gas chromatography-mass spectrometry of their t -butyldimethylsilyl derivatives. Statistical methods for comparing the resulting three-dimensional fingerprints were developed. An HPLC method was adapted for analysis of naphthenic acids concentrations in laboratory cultures. The biodegradation of Kodak salts and Merichem acids was characterized by measuring the rate of mineralization, naphthenic acids loss, toxicity decrease, and changes in component distribution.

Vegetation diversity and biomass: Response to oil sands tailings disposal in Fort McMurray, Alberta

Authors Roy, M. - C., & Foote L.
Year of Publication: 2010

Abstract:
While covering the bottom of constructed wetlands with a layer of oil sands tailings has been proposed as a means of disposal, the salts and naphthenic acids (NA) in tailings may have negative impacts on wetland vegetation development. This study was conducted to determine if wetlands constructed with oil sands tailings have a lower vegetation diversity and biomass than constructed wetlands that are not amended with tailings. The effects of NA and salinity on the vegetation in natural, constructed, and tailings-impacted wetlands were evaluated in 30 sites in the Fort McMurray region. Results of the study indicate that the presence of tailings negatively impacted both vegetation diversity and biomass. Salinity was identified as the primary causal factor.

Vegetation stress survey in the vicinity of the Syncrude and surrounding oil sands leases August 2001

Authors
Year of Publication: 2002

Abstract:
Syncrude Canada Ltd. and Suncor Inc. operate oil sands processing facilities in the Fort McMurray area that emit acidic emissions including sulphur, nitrous oxide and heavy metals. A study of the vegetation stress was conducted in a study area within the vicinity of the Syncrude Canada Ltd. and Suncor Inc. oil sands leases in order to document conditions in 2001. This is the fifth assessment of vegetation stress in the area since 1978. The study consisted of the interpretation of false colour infra-red (FCIR) air photographs with a nominal scale of 1:10 000, a field inventory to ground-truth the interpretation and final mapping of the extent of vegetation stress. The air photographs were obtained in early August and field inventories were conducted in late August of 2001. Stress factors of insect infestations, disease, excess moisture stress (natural and man-caused) and fire were documented and ranked based on the amount of vegetation displaying symptoms of injury or stress. Trees and shrubs known to be sensitive to acidifying emissions, including trembling aspen, jack pine and alder were examined to document the extent of impact. The overall vegetation health within the study area is good to very good, thus reducing the amount of stress from all causes. The major causes and areas of stress within the study area are: • insect and disease damage (1 685 ha); • natural moisture excess (191 ha); • man-caused moisture excess (41 ha); and • fire (1 777 ha). Based on interpretation of FCIR photography and field survey, no visual evidence of vegetation stress related to air pollution was found within the study area.

Vegetation studies pertinent to the AOSERP study area: A literature review

Authors Steen, O. A.
Year of Publication: 1979

Abstract:
The objective of this literature review is to briefly discuss and summarize the available vegetation literature pertinent to the Alberta Oil Sands Environmental Research Program (AOSERP) study area. It is intended that this review provide one basis for evaluating the current progress regarding vegetation descriptions in this area and for designing certain future vegetation studies. This review considers only vegetation studies from northern Alberta or Saskatchewan as they are pertinent to the AOSERP study area. It is not a comprehensive review of boreal vegetation literature.

Very high resolution meteorological satellite study of oil sands weather "A feasibility study"

Year of Publication: 1977

Abstract:
Imagery from both meteorological and environmental satellite sensor systems was analyzed to determine its applicability in monitoring weather conditions at the Alberta oil sands. Two sensor systems were the objects of investigation, the multispectral scanner (MSS) aboard the environmental LANDSAT satellites and the Very High Resolution Radiometer (VHRR) aboard the NOAA meteorological satellites. Weather conditions such as clear and cold, convective cloudiness, and widespread precipitation were studied with the available satellite imagery. The images and known weather conditions were then compared to determine the capability of the satellite-based sensors to identify specific meteorological phenomena. Particulate and thermal conditions of rivers and lakes were also considered. LANDSAT could resolve meteorological features, such as single cloud elements, but since a given spot is observed only once every nine days, it is quite unsuitable for studying the motion of weather patterns. Slow-changing phenomena such as lake ice, snow cover and particulate content of water bodies are more effectively defined. NOAA satellites provide the twice-daily coverage needed for monitoring fog, smoke, plumes, and small-scale cloud patterns. Unfortunately, the resolution of the NOAA-VHRR was generally inadequate for identification of small meteorological features associated with industrial development. Satellites of the near future will have better instruments for covering the meteorology of the oil sands but no combination of their output is expected to provide ideal time and space resolution. Future studies of this type should find satellite images easily available because of rapidly improving Canadian sources and because of the explanation of image acquisition given in this study.

Voices from the shadows: Investigating the identity and wellbeing of male mobile workers in the contemporary 'boom-sphere' context of the Alberta oil sands

Authors Angel, A. C.
Year of Publication: 2014

Abstract:
Mobile workers are those individuals who commute to and from resource development projects and who live temporarily in work camps, lodges, hotels, private rental suites, or other short-term accommodations. My thesis specifically explores the over-stereotyped and under-researched lives of male mobile workers living and working away from home in the industrial mega-project of the Alberta Oil Sands. The aim of my research is three-fold: 1. to develop a more accurate understanding of the contemporary boomtown context; 2. to gain a fuller, more nuanced understanding of the lived experiences and identities of male mobile workers in the Alberta Oil Sands; and 3. to better understand how the mobile work arrangement affects mobile worker wellbeing. To elucidate the lived experiences of male mobile workers I used a narrative approach, informed by narrative inquiry and the life story interview. This study is based on qualitative semi-structured interviews with 34 research participants. My research participants comprise three categories: mobile workers (16 in total); key informants in the helping profession (11 in total); and 'mobile work experts' (7 in total). From these narratives, I documented the 'storied identities' of mobile workers and explored mobile worker wellbeing as it is conceptualized in the Being, Belonging and Becoming model developed by Dr. Dennis Raphael and colleagues (Raphael et al. 1996, 1997). Additionally, in following with my narrative approach, and interweaved within my thesis, are what I term 'narrative threads'. These narrative threads consist of my own personal stories related to mobile work, as well as stories told by my research participants; together, these stories vividly illustrate and reinforce my key research themes. My research findings speak to the three research areas that I have described above. First, to account for the new 'liquid modern era' (Bauman 2001a) and the 'new world of work' (Beck 2000), I reconceptualize the traditional notion of the boomtown and offer a new boomtown model that specifically centers on the mobile worker's experience. The boom-sphere comprises the 'home-sphere', the 'commute-sphere', and the 'work-camp-sphere'. Second, in terms of mobile worker identity, my research reveals that mobile workers generally fall into one of two 'archetypal' identities that I conceptualize as existing at two different ends of a sliding continuum. The 'Thrivers' -- those who are doing fairly well to very well by overcoming the challenges of mobile work, such as being away from family, working long hours for an extended period of time, living in remote settings, on one end; and the 'Strugglers' -- those who are really struggling with the mobile work lifestyle due to issues related to money, relationships, and substance abuse -- on the opposing end. Third, I identify five key themes related to how the mobile work arrangement affects worker wellbeing. These themes are: 1. the 'identity-tension' and stress experienced by workers as they move along the 'home-sphere', 'commute-sphere', and 'work-camp-sphere' trajectory; 2. the danger and opportunity of high pay (facilitates the accumulation of debt/facilitates the achievement of goals); 3. the identity-limiting and alienating spaces of some work camps that made workers feel like they were in prison; 4. 'The Oil Comes First' maxim that was loudly implicit within the work sites during the oil boom and that left workers feeling undervalued, alienated, and feeling like a mere "cog in the machine"; and 5. the 'Shaking of the Pop Bottle' phenomenon, which involves some workers putting their mental and physical health 'on hold' due to the pressures of shiftwork and due to the 'Big Boys Don't Cry' work culture, and then eventually reaching a 'breaking point'. In terms of the policy implications of my research, I introduce the idea of a Mobile Worker Wellbeing Assessment Tool as a way to assess and improve mobile work environments and, ultimately, as a way to enhance mobile worker wellbeing. Finally, I identify a number of future research areas, including the need to better understand the relationship between masculinity and worker wellbeing in contemporary resource development settings.

Walleye and goldeye fisheries investigations in the Peace-Athabasca Delta - 1975

Year of Publication: 1976

Abstract:
The following report presents the results of- investigations on walleye and goldeye in the Peace-Athabasca Delta in 1975. The report is divided into four main sections that concern the following topics: (1) walleye in the Richardson Lake – Lake Athabasca system; (2) goldeye in the Lake Claire – Mamawi Lake system; (3) field observations of the completed Little Rapids weir on Riviere des Rochers; (4) assessment of field trials of the feasibility of marking fish with acrylic dye. Spawning success, movement, distribution, age structure, and several other biological characteristics of walleye and goldeye in the Peace-Athabasca Delta are discussed. The results of fisheries investigations in 1975 were generally incomplete because of the late initiation (mid-July) of the field work, and must therefore be interpreted carefully. BACKGROUND AND PERSPECTIVE The study on walleye and goldeye in the Peace-Athabasca Delta was sponsored by the Aquatic Fauna Technical Research Committee of AOSERP, in cooperation with the Peace Athabasca Delta Monitoring Group. This group is a multidisciplinary committee composed of representatives from governments of Alberta. Saskatchewan and Canada, and charged with the responsibility of monitoring the effects of remedial measures taken to restore water levels in the delta region. AOSERP funded the investigation in order to gain insight into baseline conditions with respect to walleye and goldeye in the Peace-Athabasca Delta. Walleye Investigations The primary objectives of this study were to delimit fry production in Richardson Lake during 1975 and to obtain the current age structure of the Lake Athabasca walleye population. A secondary objective was to obtain length-weight, age-length relationships and to determine sex ratios for the Lake Athabasca walleye. Studies on walleye fry numbers in the Delta region, surveys of some Saskatchewan streams along the south shore of Lake Athabasca and studies on life history and population dynamics of walleye in the delta have provided evidence that Richardson Lake is a major spawning ground for walleye arid that spawning in Richardson Lake provides most of the annual recruitment to the Lake Athabasca walleye population. Although all areas in the delta have not been surveyed, no other region in the delta has been identified as a major walleye spawning area. Much of Richardson Lake, and its outlet stream, Jackfish Creek, freeze to the bottom during winter. Walleye migrate from Lake Athabasca to the Athabasca River by Big Point Channel during March. Due to ice thickness and the lack of flowing water, walleye cannot enter Richardson Lake until flood waters from the Athabasca River flow into Richardson Lake via Jackfish Creek. These flood waters normally lift the ice in late April, or soon thereafter, and the spawning migration proceeds into Richardson Lake. It is possible that unusually low waters in the spring could cause conditions which would prevent or delay walleye from spawning in Richardson Lake. In view of the present situation, it appears that Richardson Lake is critical to the recruitment of walleye in Lake Athabasca and that the spawning success of this species could be seriously disrupted by unusually low water, during the spring. Goldeye Investigations The major objectives of this study were to determine the age structure of the goldeye population in the Claire-Mamawi Lakes system; and to estimate spawning success of goldeye in the system. A secondary objective was to collect information concerning seasonal movements of goldeye. Results from past studies indicate that goldeye migrate into waters of the Peace-Athabasca Delta in the spring to spawn and move back into the Peace River during summer and autumn. These studies suggest that the Chenal des Quatre Fourches is a major spring migration route for adult and juvenile goldeye as well as a major summer and autumn migration route for goldeye adults, juveniles and fry. Concern has arisen that water level control structures may block) this migration route. It was not possible to absolutely assess the spawning success of goldeye in 1975 because the number of spawners was unknown. In relative terms spawning in 1975 appeared to be less successful than in previous years. Little Rapids Weir On the basis of data gathered during ground and aerial inspections, several sites close to and on both sides of the weir and fishway have been identified as being suitable for setting gillnets. Nets cannot be set close to the weir or fishway due to strong turbulence. The dam constructed across the Flett bypass channel of Riviere des Rochers was also inspected. Water in this channel can flow through the rockfill dam, but fish cannot pass through this structure. Acrylic Dye Marking of Fish A total of 38 walleye were marked during September 1975, in Lake Athabasca near Fort Chipewyan. Most walleye were injected in the operculum (gill cover) and several were injected in the lower jaw. Injection was accomplished more easily in the operculum than in the lower jaw but because pigmentation in the lower jaw is lighter, the dye was more visible. During October 1975, 47 goldeye were marked above the weir at Little Rapids. They were injected at the origin of the anal fin. Between 30 and 40 northern pike and lake whitefish respectively were also marked. The most suitable injection site of a northern pike was at the base of either pelvic fin. Blue dye was easily visible anywhere on the ventral surface of lake whitefish, but was most visible at the base of the adipose fin. ASSESSMENT In depth investigations of spawning success, movement, distribution, age structure and other biological characteristics of walleye and goldeye populations in Peace-Athabasca Delta were conducted for the Aquatic Fauna Technical Research Committee of AOSERP. The study provides baseline information on walleye and goldeye populations with respect to the “before conditions” faced by the Athabasca Delta fisheries in view of the prospect of present and increased levels of oil sands development. This “before condition” is in the context of the “after condition” produced by remedial measures implemented after the Peace-Athabasca Delta Project Investigations into the effects of the Bennett Dam constructed on the Peace River in 1968. The report has been reviewed extensively by Research Secretariat of Alberta Environment and the Aquatic Fauna Research Committee and has been approved for publication. The content of this report does not necessarily reflect the views of Alberta Environment, Environment Canada or the Oil Sands Environmental Study Group. The mention of trade names for commercial products does not constitute an endorsement or recommendation for use. The Aquatic Fauna Committee acknowledges the importance of this report with respect to future fisheries studies in the Peace-Athabasca Delta. It will serve as the basis for studies into the effects of other manmade, structures in, the Athabasca River basin. Such basic investigations: are important since the Peace-Athabasca Delta is one of the most productive regions in Alberta. It is recognized by the Oil Sands Environmental Study Group that although innovative research methodology was not employed in the study, changes in methodology are difficult to accommodate during or after completion of a field project. The OSESG does acknowledge that the research objectives have been met and compliments the researchers on addressing themselves directly to the research subjects. The Aquatic Fauna Technical Research Committee of the Alberta Oil Sands Environmental Research Program accepts \"Walleye and Goldeye Investigations in the Peace-Athabasca Delta - 1975\" as an important and valid research document, and thanks the researchers for their scientific contributions.

Water availability and forest growth in coarse-textured soils

Year of Publication: 2011

Abstract:
A method of evaluating the influence of soil layering and climatic variability on plant available water for forest growth is presented. This method enables species-specific levels of maximum sustainable plant transpiration to be evaluated. A calibrated HYDRUS-1D model was used with a 60-yr meteorological record to simulate actual evapotransipration (ETa) of dominant tree species with different values of leaf area index (LAI) for three sites in northern Alberta. A probability distribution of ETa was developed for each case. The relationships between LAI, plant above-ground primary production (ANPP), and ETa were used to estimate the minimum water demand to support plant growth at specific sites. The developed frequency curves of ETa and the minimum water demand can be used to determine the maximum sustainable LAI and the risk associated with revegetating a particular site with a dominant tree species. The effect of different tree species on the minimum water demand and the maximum sustainable LAI was also illustrated. The results indicated that layering of coarse-textured soils can provide more plant available water and support a higher maximum sustainable LAI than homogeneous soils of a similar texture.

Water odour Athabasca River February and March 1993

Year of Publication: 1994

Abstract:
The purpose of this study was to determine the potential for off-flavour tainting of water and/or fish in the Athabasca River by compounds discharged by bleached kraft and chemi-thermomechanical pulp mills. The opportunity to determine in-stream occurrence of common tainting compounds prior to the startup of the Alberta-Pacific mill was exploited. This study combined three different analytical methods commonly used in monitoring for the presence of odorous compounds in water supplies. Two trained flavour profile panels were used to characterize the odour of the samples, two trained analysts evaluated the samples using olfactory GC and all samples were quantitatively analyzed for the presence of target odour compounds using GC/MS. These three techniques all provide quite different information and all have certain limitations. The flavour profile panel work, involving two independent panels, clearly indicated an impact of Hinton combined effluent on the odour of the Athabasca River for substantial distances downstream. The odour contributions to the Athabasca River from tributaries were minor. The odour contributions from other effluent sources (sewage treatment plants and chemi-thermomechanical pulp mills) were less distinctive than the Hinton combined effluent and their role in affecting downstream odour is not as clear. Notwithstanding these observations, the observed impacts on raw water odour could not be detected in the treated drinking water at Ft. McMurray, possibly because of removal of odorous compounds in treatment and / or masking of the raw water odour with chlorinous odours. The raw water supply at Ft. Chipeweyan was not particularly odorous and the finished water exhibited a very strong chlorine odour that would have masked any subtle odours present. The CLSA-GC/MS for target compounds also suggests that there was limited contribution of odour compounds from the tributaries. None of the effluent samples, including the Hinton combined effluent, contributed substantial concentrations of the target odour compounds to the Athabasca River, with the possible exception of geosmin. Notwithstanding these findings, there was a very distinctive rise in 3,4,5-trichloroveratrole and a measurable, but less distinctive rise in 2,4,6-trichloroanisole in the Athabasca River downstream of Hinton. Because neither of these compounds were present in substantial concentration in the Hinton combined effluent, and their concentrations increased downstream of Hinton, there is not a simple explanation for a possible role of this effluent source in the observed Athabasca River system concentrations for these compounds. In any case, none of the target odour compounds, by themselves would explain the odour character that was perceived by the flavour panel in the Hinton combined effluent and affected downstream samples. The OGC should have provided a separate approach to account for non-target odorous compounds that might explain the odours perceived by the flavour panel. However, there were very few extra odour peaks detected by OGC with perhaps only a sulfiiry / septic odour and a sulfury/mercaptan/crude oil odour that were likely to have contributed in any substantial way to the pulp mill odour character. Identifying these compounds would likely assist the odour characterization process, but there are likely other contributing compounds that have not yet been detected by the methods employed in this survey. This possibility suggests the need for a better characterization of the compounds that are primarily responsible for creating the odour of pulp mill effluents.

Water odour, Athabasca River, 1994 (POST ALPAC)

Authors Kenefick, S.
Year of Publication: 1996

Abstract:
The purpose of the study was to determine the potential for off-flavour tainting of water and/or fish in the Athabasca River by compounds discharged from bleached kraft and chemi-thermomechanical pulp mills. This study combined three different analytical methods commonly used in monitoring for the presence of odorous compounds in water supplies.

Water problems in in-situ oilsands development: The water resources of the Gregoire Lake Basin

Authors Hallock, M. C.
Year of Publication: 1976

Abstract:
An investigation of the potential dangers of in-situ development of oilsands at Amoco's Gregoire Lake Experimental Site might have on the water resources of the Gregoire Lake Basin.

Water quality and aquatic resources of the Beaver Creek diversion, 1977

Year of Publication: 1978

Abstract:
The Beaver Creek Diversion System was investigated from March to November, 1977, to describe post-diversion conditions in Beaver Creek, Ruth Lake and Poplar Creek and to characterize the two newly created water bodies in the system. Ten sites in the system were sampled regularly for physical-chemical parameters, phytoplankton, zooplankton and benthic macroinvertebrates. Additional surveys were done for fish, aquatic macrophytes, stream drift and stream habitat.

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