Browse by All Cardiff Authors

Shi, Yi, Babatunde, Akintunde, Bockelmann-Evans, Bettina, Li, Qijie and Zhang, Liang 2020. On-going nitrification in chloraminated drinking water distribution system (DWDS) is conditioned by hydraulics and disinfection strategies. Journal of Environmental Sciences 96 , pp. 151-162. 10.1016/j.jes.2020.04.028

Kiiza, Christopher, Pan, Shun-qi, Bockelmann-Evans, Bettina and Babatunde, Akintunde 2020. Predicting pollutant removal in constructed wetlands using artificial neural networks (ANNs). Water Science and Engineering 13 (1) , pp. 14-23. 10.1016/j.wse.2020.03.005

Cowle, Matthew W., Webster, Gordon, Babatunde, Akintunde O., Bockelmann-Evans, Bettina N. and Weightman, Andrew J. 2020. Impact of flow hydrodynamics and pipe material properties on biofilm development within drinking water systems. Environmental Technology 41 (28) , pp. 3732-3722. 10.1080/09593330.2019.1619844

Shi, Yi, Babatunde, Akintunde, Bockelmann-Evans, Bettina and Webster, Gordon 2019. Influence of hydraulic regimes and Cl2/NH3-N mass ratios on the bacterial structure and composition in an experimental flow cell chloraminated drinking water system. Environmental Science: Water Research & Technology 5 (5) , pp. 977-992. 10.1039/C9EW00015A

Stubbs, Alex, Stoesser, Thorsten and Bockelmann-Evans, Bettina 2018. Developing an approximation of a natural, rough gravel riverbed both physically and numerically. Geosciences 8 (12) , p. 449. 10.3390/geosciences8120449

Mhashhash, Aisha, Bockelmann-Evans, Bettina and Pan, Shunqi 2018. Effect of hydrodynamics factors on sediment flocculation processes in estuaries. Journal of Soils and Sediments 18 (10) , pp. 3094-3103. 10.1007/s11368-017-1837-7

Stubbs, Alex, Bockelmann-Evans, Bettina Nicole and Stoesser, Thorsten 2017. Numerical modelling of colmation and decolmation processes for gravel-bed river restoration schemes. Presented at: EGU General Assembly 2017, Vienna, Austria, 8-13 April 2017. Geographical Research Abstract.

Cowle, Matthew, Babatunde, Akintunde and Bockelmann-Evans, Bettina Nicole 2017. The frictional resistance induced by bacterial based biofouling in drainage pipelines. Journal of Hydraulic Research 55 (2) , pp. 269-283. 10.1080/00221686.2016.1212411

Ahmadian, Reza, Falconer, Roger and Bockelmann-Evans, Bettina 2017. Hydro-environmental modelling of a Severn Barrage with very low head turbines. Presented at: 37th IAHR World Congress, Kuala Lumpur, Malaysia, 13-18 August 2017. -.

Cea, L., Bermudez, M., Puertas, J., Blade, E., Corestein, G., Escolano, E., Conde, A., Bockelmann-Evans, Bettina and Ahmadian, Reza 2016. IberWQ: new simulation tool for 2D water quality modelling in rivers and shallow estuaries. IAHR/IWA Journal of Hydroinformatics 18 (5) , pp. 816-830. 10.2166/hydro.2016.235

Mhashhash, Aisha, Bockelmann-Evans, Bettina Nicole and Pan, Shunqi 2016. Explicitly salinity and sediment concentration on flocculation processes in estuaries. Presented at: 3rd International Symposium on River Sedimentation, Stuttgart, Germany, 19-22 September 2016.

Mhashhash, Aisha, Bockelmann-Evans, Bettina Nicole and Pan, Shunqi 2016. Effect of hydrodynamics factors on flocculation processes in estuaries. Presented at: 4th IAHR European Congress, Liege, Belgium, 27-29 July 2016.

Al-Enezi, Eqbal, Bockelmann-Evans, Bettina and Falconer, Roger Alexander 2016. Phosphorus adsorption/desorption processes of estuarine sediment: a case study — Loughor Estuary, UK. Arabian Journal of Geosciences 9 (3) , 200. 10.1007/s12517-015-2014-1

Angeloudis, Athanasios, Ahmadian, Reza, Falconer, Roger Alexander and Bockelmann-Evans, Bettina Nicole 2016. Numerical model simulations for optimisation of tidal lagoon schemes. Applied Energy 165 , pp. 522-536. 10.1016/j.apenergy.2015.12.079

Osei-Twumasi, A., Falconer, Roger Alexander and Bockelmann-Evans, Bettina Nicole 2015. Experimental studies on water and solute transport processes in a hydraulic model of the Severn Estuary, UK. Water Resources Management 29 (6) , pp. 1731-1748. 10.1007/s11269-014-0908-4

Lucas, Rhodri, Earl, E. R., Babatunde, Akintunde and Bockelmann-Evans, Bettina Nicole 2015. Constructed wetlands for stormwater management in the UK: a concise review. Civil Engineering and Environmental Systems 32 (3) , pp. 251-268. 10.1080/10286608.2014.958472

Fenrich, E., Bockelmann-Evans, Bettina Nicole, Kadiri, Margaret Osikhofe, Ahmadian, Reza, Wieprecht, S. and Falconer, Roger Alexander 2015. An input-output approach to assessing the influence of changes in eutrophication potential on estuarine ecosystems due to tidal barrage. Presented at: 10th InternationalSymposium on Ecohydraulics, Trondheim, Norway, 23-27 June 2014.

Kadiri, Margaret Osikhofe, Bockelmann-Evans, Bettina Nicole and Rauen, William Bonino 2014. Assessing the susceptibility of two UK estuaries to nutrient enrichment. Continental Shelf Research 88 , pp. 151-160. 10.1016/j.csr.2014.08.002

Ahmadian, Reza, Falconer, Roger Alexander and Bockelmann-Evans, Bettina Nicole 2014. Comparison of hydro-environmental impacts for ebb-only and two-way generation for a Severn Barrage. Computers & Geosciences 71 , pp. 11-19. 10.1016/j.cageo.2014.05.006

Kadiri, Margaret Osikhofe, Ahmadian, Reza, Bockelmann-Evans, Bettina Nicole, Falconer, Roger Alexander and Kay, David 2014. An assessment of the impacts of a tidal renewable energy scheme on the eutrophication potential of the Severn estuary, UK. Computers & Geosciences 71 , pp. 3-10. 10.1016/j.cageo.2014.07.018

Cowle, Matthew, Babatunde, Akintunde, Rauen, W. B., Bockelmann-Evans, Bettina Nicole and Barton, A. F. 2014. Biofilm development in water distribution and drainage systems: dynamics and implications for hydraulic efficiency. Environmental Technology Reviews 3 (1) , pp. 31-47. 10.1080/09593330.2014.923517

Angeloudis, Athanasios, Ahmadian, Reza, Falconer, Roger Alexander and Bockelmann-Evans, Bettina Nicole 2014. Numerical modelling of a tidal lagoon along the North Wales coast. Presented at: 1st International Conference on Renewable Energies Offshore, Lisbon, Portugal, 24-26 November 2014.

M, Bermudez, Ahmadian, Reza, Bockelmann-Evans, Bettina Nicole, L, Cea and J, Puertas 2014. Sensitivity of an Escherichia Coli Transport Model to the decay rate in a coastal basin. Presented at: 3rd IAHR Europe Congress, Porto, Portugal, 14 - 16 April 2014.

Kadiri, Margaret Osikhofe, Bockelmann-Evans, Bettina Nicole, Zhou, Juntao and Falconer, Roger Alexander 2014. Water quality impacts of a tidal barrage in the Severn Estuary, UK. Presented at: 10th International Symposium on Ecohydraulics, Trodheim, Norway, June 23-27.

Sparks, Tim D., Bockelmann-Evans, Bettina and Falconer, Roger Alexander 2013. Development and analytical verification of an integrated 2-D surface water-groundwater model. Water Resources Management 27 (8) , pp. 2989-3004. 10.1007/s11269-013-0327-y

Kadiri, Margaret Osikhofe, Kay, D., Ahmadian, Reza, Bockelmann-Evans, Bettina Nicole, Falconer, Roger Alexander and Bray, Michaela 2013. Impacts of marine renewable energy scheme operation on the eutrophication potential of the Severn Estuary, UK. Presented at: European Geosciences Union General Assembly 2013, Vienna, Austria, 7-12 April 2013.

Kadiri, Margaret Osikhofe, Bockelmann-Evans, Bettina and Rauen, M. 2013. Nutrient dynamics in two contrasting estuaries in Wales. Presented at: Estuarine Coastal Sciences Association (ECSA) Symposium on the Problems in Small Estuaries, Swansea, Wales, UK, 8-11 April 2013.

Liang, Dongfang, Wang, Xiaolin, Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2013. Study on nutrient distribution and interaction with sediments in a macro-tidal estuary. Advances in Water Resources 52 , pp. 207-220. 10.1016/j.advwatres.2012.11.015

Sparks, Timothy Daniel, Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2013. Laboratory validation of an integrated surface water- groundwater model. Journal of Water Resource and Protection 05 (04) , pp. 377-394. 10.4236/jwarp.2013.54038

Kadiri, Margaret Osikhofe, Ahmadian, Reza, Bockelmann-Evans, Bettina Nicole, Kay, D. and Falconer, Roger Alexander 2013. Impact of different marine renewable energy scheme operating modes on the eutrophication potential of the Severn Estuary. Presented at: 35th IAHR World Congress, Chengdu, China, 8-13 September 2013.

Fenrick, E., Ahmadian, Reza, Bockelmann-Evans, Bettina Nicole, Marx, W., Wieprecht, S. and Falconer, Roger Alexander 2013. An input-output approach to linking ecosystems to water quality effects of tidal power schemes. Presented at: 35th IAHR World Congress, Chengdu, China, 8-13 September 2013.

Harries, Tom, Brammer, James, Bockelmann-Evans, Bettina Nicole and Kwan, Alan Shu Khen 2013. Quantification and visualisation of blockage effects for a savonius type turbine using particle image velocimetry. Presented at: 35th IAHR World Congress, Chengdu, China, 8-13 September 2013.

Kadiri, Margaret Osikhofe, Kay, D., Ahmadian, Reza, Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2013. Potential impacts of a barrage on the eutrophic status of the Severn Estuary, UK. Presented at: 10th European Wave and Tidal Energy Conference Series (EWTEC 2013), Aalborg, Denmark, 2-5 September 2013.

Fenrich, Eva, Wieprecht, Silke, Ahmadian, Reza, Bockelmann-Evans, Bettina Nicole, Marx, Walter and Falconer, Roger Alexander 2012. Modelling tidal renewable energy schemes as building blocks in a low carbon society. Presented at: International Symposium on Dams for a Changing World- Need for knowledge transfer across the Generations & the World, Kyoto, Japan, 5 June 2005.

Ahmadian, Reza, Falconer, Roger Alexander and Bockelmann-Evans, Bettina Nicole 2012. Far-field modelling of the hydro-environmental impact of tidal stream turbines. Renewable Energy 38 (1) , pp. 107-116. 10.1016/j.renene.2011.07.005

Kadiri, Margaret Osikhofe, Ahmadian, Reza, Bockelmann-Evans, Bettina Nicole, Rauen, William Bonino and Falconer, Roger Alexander 2012. A review of the potential water quality impacts of tidal renewable energy systems. Renewable and Sustainable Energy Reviews 16 (1) , pp. 329-341. 10.1016/j.rser.2011.07.160

Kadiri, Margaret Osikhofe, Bockelmann-Evans, Bettina Nicole, Zhou, Juntao and Falconer, Roger Alexander 2012. Water quality model development for estuaries: A combined numerical and experimental approach. Presented at: 10th International Conference on Hydroinformatics (HIC 2012), Hamburg, Germany, 14-18 July 2012.

Fenrich, E., Ahmadian, Reza, Bockelmann-Evans, Bettina Nicole, Marks, W. and Falconer, Roger Alexander 2011. Input-output modelling of tidal renewable energy. Presented at: 34th IAHR World Congress and 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering, Brisbane, Australia, 26 June - 1 July 2011. Published in: Valentine, Eric, Apelt, Colin, Ball, James, Chanson, Hubert, Cox, Ron, Ettema, Robert, Kuczera, George, Lambert, Martin, Melville, Bruce and Sargison, Jane eds. Proceedings of the 34th IAHR World Congress, 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering. Barton, ACT, Australia: Engineers Australia, pp. 1188-1193.

Ahmadian, Reza, Falconer, Roger Alexander and Bockelmann-Evans, Bettina 2011. Comparison of hydro-environmental impacts for ebb-only and two-way generation for the Severn Barrage. Presented at: 34th IAHR World Congress 33rd Hydrology and Water Resources Symposium, 10th Conference on Hydraulics in Water Engineering:balance and uncertainty - water in a changing world, Brisbane, Australia, 26 June - 1 July 2011. Published in: Valentine, E. M., Apelt, C. J. and Ball, J. eds. Proceedings of the 34th IAHR World Congress 33rd Hydrology and Water Resources Symposium, 10th Conference on Hydraulics in Water Engineering : balance and uncertainty - water in a changing world. Barton, A.C.T: Engineers Australia, pp. 1247-1254.

Ahmadian, Reza, Falconer, Roger Alexander and Bockelmann-Evans, Bettina Nicole 2011. Hydro-environmental impact assessment of the significance of the shape of arrays of Tidal Stream Turbines. Presented at: World Renewable Energy Congress - Sweden, Linköping, Sweden, 8-13 May 2011.

Liang, D., Wang, Xiangwei, Falconer, Roger Alexander and Bockelmann-Evans, Bettina Nicole 2010. Solving the depth-integrated solute transport equation with a TVD-MacCormack scheme. Environmental Modelling & Software 25 (12) , pp. 1619-1629. 10.1016/j.envsoft.2010.06.008

Al-Enezi, E., Al-Osairi, Y., Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2010. Modelling of phosphorous adsorption in estuarin sediments. Presented at: Proceedings of 6th International Symposium on Environmental Hydraulics, Athens, Greece, CRC Press, pp. 759-764.

Liang, D., Wang, X., Falconer, Roger Alexander and Bockelmann-Evans, Bettina Nicole 2010. A shock-capturing model for contaminant advection and diffusion. Presented at: 9th International Conference on Hydroinformatics, Tianjin, China, 7-11 September 2010. Proceedings of 9th International Conference on Hydroinformatics, Tianjin, China. Beijing: Chemical Industry Press, pp. 77-84.

Wang, X., Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2010. Numerical simulation of water quality and sediment transport in river Loughor estuary. Presented at: Proceedings of 9th International Conference on Hydroinformatics (HIC 2010), Tianjin, China, pp. 336-343.

Al-Enezi, E., Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2009. Phosphorous adsorption in the Loughor Estuary. Presented at: Proceedings of the 33rd International Association for Hydro-Environment Engineering and Research Congress (IAHR), Vancouver, Canada, IAHR, pp. 7017-7023.

Abdulgawad, Fathia, Bockelmann-Evans, Bettina Nicole, Sapsford, Devin James, Williams, Keith Philip and Falconer, Roger Alexander 2009. Ammonium ion adsorption on clays and sand under freshwater and seawater conditions. Presented at: 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS, Nanjing, China, 20-23 October 2008. Published in: Zhang, Changkuan and Tang, Hongwu eds. Advances in Water Resources and Hydraulic Engineering: Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS. Berlin: Springer, pp. 656-661. 10.1007/978-3-540-89465-0_115

Bockelmann-Evans, Bettina Nicole, Ahmadian, R. and Falconer, Roger Alexander 2009. Nutrient/sediment interactions in estuaries. Presented at: Proceedings of the 33rd IAHR The International Association for Hydro-Environment Engineering and Research Congress, Vancouver, Canada, IAHR, pp. 2141-2148.

Bockelmann-Evans, Bettina Nicole, Davies, R. and Falconer, Roger Alexander 2008. Measuring bed shear stress along vegetated river beds using FST-hemispheres. Journal of Environmental Management 88 (4) , pp. 627-637. 10.1016/j.jenvman.2007.03.044

Abdulgawad, F., Bockelmann-Evans, Bettina Nicole, Sapsford, Devin, Williams, Keith and Falconer, Roger 2008. Ammonium ion adsorption on clays and sand under freshwater and seawater conditions. Presented at: Proceedings of the 16th International Association of Hydraulic Engineering and Research - Asia and Pacific Division (IAHR-APD) Congress and 3rd International Association of Hydraulic Engineering and Research - International Symposium on Hydraulic Structur, Nanjing, China, Tsinghua University Press, pp. 656-661.

Al-Enezi, E., Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2008. Phosphorous adsorption on kaolinite clay. Presented at: Proceedings of the 5th International Conference on Marine Waste Water Discharges and Coastal Environment (MWWD), Cavtat, Croatia,

Bockelmann-Evans, Bettina Nicole, Abdulgawad, F. and Falconer, Roger Alexander 2008. Sampling and modelling water and sediment nutrient concentrations along the salinity gradient in the upper Loughor Estuary. Presented at: ECSA Symposium Estuarine and Coastal Sciences Association 'The Severn Estuary ', Cardiff, UK,

Bockelmann-Evans, Bettina Nicole, Sparks, T. and Falconer, Roger Alexander 2008. Modelling surface water - groundwater interactions in Cardiff Bay. Presented at: Meeting on Cardiff Bay, Cardiff Harbour Authority, Cardiff, UK,

Wang, X., Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2008. Depth averaged modelling of the characteristics of the Arabian Gulf. Presented at: Proceedings of the 16th IAHR-APD Congress and 3rd IAHR-ISHS Symposium, Nanjing, China, Tsinghua University Press, pp. 1207-1212.

Willis, M. R., Masters, I., Falconer, Roger Alexander, Cross, M., Horsfall, I., Wooldridge, Christopher Frederick, Syred, Nicholas, Fryett, Ian Alastair, Williams, A., Croft, N., O'Doherty, Timothy, O'Doherty, Daphne Maria, Lin, BinLiang, Bockelmann-Evans, Bettina Nicole, Cross, N., Evans, P., Gallie, R., Fidler, R., Thomas, S. and Mason-Jones, Allan 2008. Tidal stream turbine site selection procedures and development for a demonstration site within the Bristol Channel. Presented at: World Renewable Energy Conference, Glasgow, UK,

Falconer, Roger Alexander, Lin, Binliang, Bockelmann-Evans, Bettina Nicole, Ahmadian, Reza and Rauen, William Bonino 2008. Strategic environmental assessment, Severn tidal power call for information. [Technical Report]. Cardiff University.

Wang, Xiaolin, Bockelmann-Evans, Bettina Nicole and Liang, Dongfang 2007. Examination of FST-hemispheres for evaluating boundary shear stress in streams. Journal of River Basin Management 5 (2) , pp. 155-163.

Bockelmann-Evans, Bettina Nicole, Schnauder, Ingo, Fenrich, Eva K. and Falconer, Roger Alexander 2007. Development of a catchment-wide nutrient model. Water Management 160 (1) , pp. 35-42. 10.1680/wama.2007.160.1.35

Schnauder, I., Bockelmann-Evans, Bettina Nicole and Lin, BinLiang 2007. Modelling faecal bacteria pathways in receiving waters. Proceedings of the ICE - Maritime Engineering 160 (4) , pp. 143-153. 10.1680/maen.2007.160.4.143

Fenrich, E., Schnauder, I., Bockelmann-Evans, Bettina Nicole and Marx, W. 2006. Effect of land-use change on nutrient pollution in estuaries. Presented at: European Geosciences Union General Assembly, Vienna, Austria,

Bockelmann-Evans, Bettina Nicole, Schnauder, I., Fenrich, E. K. and Marx, W. 2006. Integrating impact of land-use changes into catchment-wide nutrient modeling. Presented at: 7th International Conference on Hydroinformatics (HIC), Nice, France,

Sparks, T., Kountcheva, D., Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2006. Physical and numerical modeling of groundwater and surface water interactions with a conservative tracer. Presented at: Proceedings of ISSMGE: 5th International Congress on Environmental Geotechnics, Cardiff, UK,

Spanoudaki, K., Nanou, A., Stamou, A. I., Christodoulou, G., Sparks, T., Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2005. Integrated surface water-groundwater modelling. Global NEST Journal 7 (3) , pp. 281-295.

Rosetto, R. and Bockelmann-Evans, Bettina Nicole 2005. Groundwater and solute transport numerical modeling: a groundwater management tool for the S Alessio municipal well field. Presented at: Proceedings of Geoitalia 2005, Epitome, Spoleto, Italy,

Rossetto, R. and Bockelmann-Evans, Bettina Nicole 2005. Investigation of the transport and accumulation mechanisms of a herbicide in the river floodplain and groundwater system of the S Alessio Plain, Lucca (Italy). Presented at: Geophysical Research Abstracts, Vienna, Austria,

Schnauder, I. and Bockelmann-Evans, Bettina Nicole 2005. 2D numerical modelling of nutrient pathways for Camarthen Bay, Wales. Presented at: European Geosciences Union General Assembly 2005, Vienna, Austria,

Schnauder, I. and Bockelmann-Evans, Bettina Nicole 2005. A nitrogen transport model for Camarthen Bay, Wales. Presented at: Proceedings of the XXXI IAHR Congress, Seoul, South Korea,

Spanadouki, K., Nanou, A., Stamou, A. I., Christodoulou, G., Sparks, T., Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2005. Integrated surface/subsurface water modelling. Presented at: Proceedings of the 9th International Conference on Environmental Science and Technology, Rhodes Island ,Greece, pp. 1371-1376.

Bockelmann-Evans, Bettina Nicole, Fenrich, Eva K., Lin, BinLiang and Falconer, Roger Alexander 2004. Development of an ecohydraulics model for stream and river restoration. Ecological Engineering 22 (4-5) , pp. 227-235. 10.1016/j.ecoleng.2004.04.003

Bockelmann, Bettina Nicole, Lin, BinLiang, Falconer, Roger Alexander and Namin, M. 2004. Model development for investigation of impact of eutrophication on shellfish ecosystem. Presented at: Proceedings of 5th International Symposium on Ecohydraulics, Madrid, Spain, , vol. Paper.

Bockelmann, Bettina Nicole, Taber, L., Sparks, T., Namin, M. and Falconer, Roger Alexander 2004. Integrated surface/subsurface river basin modelling. Presented at: 6th International Conference on Hydroinformatics, Singapore,, 21-24 June 2004. Proceedings of the 6th International Conference on Hydroinformatics. World Scientific, pp. 1843-1850.

Sparks, T., Namin, M., Bockelmann-Evans, Bettina Nicole and Falconer, Roger Alexander 2004. Integrated river basin modelling - finite difference modelling of surface water and groundwater using DIVAST. Presented at: 12th ACME Association of Computational Mechanics in Engineering Annual Conference, Cardiff, UK,

Bockelmann, Bettina Nicole, Lin, BinLiang and Falconer, Roger Alexander 2003. Ecohydraulics field and modelling study for river restoration. Presented at: Proceedings of 30th IAHR International Association of Hydraulic Research Congress, Thessaloniki, Greece, pp. 473-480.

Bockelmann, Bettina Nicole, Fenrich, E. K. and Falconer, Roger Alexander 2002. Development of an eco-hydraulics model for stream restoration. Presented at: Proceedings 4th International Ecohydraulics Symposium, Cape Town, South Africa,

Bockelmann, Bettina Nicole 2001. Eco-hydraulics model development for a stream restoration scheme. Presented at: Proceedings of the 29th IAHR rnational Association of Hydraulic Engineering and Research Congress, Beijing, China,

Bockelmann, Bettina Nicole and Falconer, Roger Alexander 2001. Eco-hydromorphological model development for a stream restoration scheme. Presented at: Proceedings of Eighth Scientific and Technical Review on Good Ecological Status, EurAqua, Finnish Environment Institute, Helsinki, Finland 2001., Helsinki, Finland,