Sale M. C. (2007) The value of freshwater inflows into the Kowie, Kromme and Nahoon Estuaries Nelson Mandela Metropolitan University

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Sale M. C., Hosking S. G. & Du Preez M. (2009) Application of the contingent valuation method to estimate a recreational value for the freshwater inflows into the Kowie and the Kromme Estuaries Water SA 35: 261–270

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Scharler U. M. & Baird D. (2003) The influence of catchment management on salinity, nutrient stochiometry and phytoplankton biomass of Eastern Cape estuaries, South Africa Estuarine, Coastal and Shelf science 56: 735–748

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Scharler U. M. & Baird D. (2005) A comparison of selected ecosystem attributes of three South African estuaries with different freshwater inflow regimes, using network analysis Journal of Marine Systems 56: 283–308

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Schumann E. H. (2010) Oceanic exchanges and temperature variability in the Knysna Estuary Transactions of the Royal Society of South Africa 55: 123–128

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Schumann E. H. (2015) Keurbooms estuary floods and sedimentation South African Journal of Science 111: 1–9

Keywords: barrier dune, estuary morphology, mouth migration, ocean waves, river floods

Russell I. A. & Randall R. M. (2017) Effects of prolonged elevated water salinity on submerged macrophyte and waterbird communities in Swartvlei Lake, South Africa WaterSA 43: 666–672

Keywords: Swartvlei Lake, estuarine lake, drought, flood, macrophyte senescence, biotic interactions, environmental change, global warming

Russell I. A., Randall R. M. & Hanekom N. (2014) Spatial and temporal patterns of waterbird assemblages in the Wilderness lakes complex, South Africa Waterbirds 37: 1–18

Keywords: Depth variability, salinity, submerged macrophytes, swartvlei estuary, Touw estuary, turbidity, waterbird communities

Russell I. A., Randall R. M., & Kruger N. (2010) Garden Route National Park, Knysna Coastal Section, State of Knowledge SANParks

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Russell I. A. (2015) Spatio-temporal variability of five surface water quality parameters in the Swartvlei estuarine lake system, South Africa African Journal of Aquatic Science 40: 119–131

Keywords: Dissolved oxygen, long-term monitoring, pH, salinity, tempreture, turbidity