Salt Fluxes within a Very Shallow Subtropical Estuary

Circulation and salt balance in the São Francisco river Estuary (NE/Brazil)

“…First, the presence of strong river discharge that remained constant in the region during the spring tidal period resulted in an seaward current strength during the last stage of the ebb period (MANTOVANELLI et al, 2004), and second, a slightly high flood currents within the estuary main channel due to the high tide conditions contributed to enhance the coastal water flow into the estuary (VAZ et al, 2005). Moreover, as mentioned earlier, the predominant wind blows towards the estuary head at SE-NW direction, which might also contribute in strengthen the upstream currents (ALI et al, 2010;LEWIS;LEWIS, 1983). On the other hand, our data show that salinity remained stratified in both spring-neap tides indicating a minimum salinity gradient during low water as a result of the advective flux pushing less saline water downstream during the ebb tide, similar to what was found by Miranda et al (2004).…”

Macroinfauna Dynamics and Sediment Parameters of a Subtropical Estuarine Lake—Coombabah Lake (Southern Moreton Bay, Australia)

“…Furthermore, the lake is a protected fish habitat area (Fisheries Act 1994) and provides a nursery for commercially and recreationally important fish, prawn and crab species. The lake is open to the Gold Coast Broadwater (a barrier island lagoon), through Coombabah Creek, and is subject to a mixed semidiurnal tidal regime with salinity ranging from~10 to 33 (Ali, Lemckert, and Dunn, 2010). The tidal and hydrodynamic conditions characteristics of the lake are described by Knight et al (2008), Ali, Zhang, andDunn (2010).…”

“…The lake is open to the Gold Coast Broadwater (a barrier island lagoon), through Coombabah Creek, and is subject to a mixed semidiurnal tidal regime with salinity ranging from~10 to 33 (Ali, Lemckert, and Dunn, 2010). The tidal and hydrodynamic conditions characteristics of the lake are described by Knight et al (2008), Ali, Zhang, andDunn (2010). Annual rainfall for the region is approximately 1400 mm, with intense rainfall events common throughout the summer period.…”

Sediment Dynamics of a Very Shallow Subtropical Estuarine Lake

“…Over the past five decades, human activities surrounding Coombabah Lake (including the clearing of land for golf courses and the construction of a sewage treatment plant on the eastern margin of the lake) have significantly altered the catchment and surrounding land use. According to the regional importance of the lake and surrounding wetlands, the region has been the focus of recent scientific efforts (e.g., Ali, Lemckert, and Dunn, 2010;Ali, Zhang, and Lemckert, 2009;Dunn et al, 2007aDunn et al, , 2007bDunn et al, , 2008Dunn et al, , 2012Knight et al, 2008), with most efforts being aimed at understanding the physical and biogeochemical processes within the lake. Previously, Ali, Lemckert, and Dunn (2010) quantified salt fluxes of Coombabah Lake and determined the dominant mixing processes of this estuarine system and recommended further modelling studies.…”

“…According to the regional importance of the lake and surrounding wetlands, the region has been the focus of recent scientific efforts (e.g., Ali, Lemckert, and Dunn, 2010;Ali, Zhang, and Lemckert, 2009;Dunn et al, 2007aDunn et al, , 2007bDunn et al, , 2008Dunn et al, , 2012Knight et al, 2008), with most efforts being aimed at understanding the physical and biogeochemical processes within the lake. Previously, Ali, Lemckert, and Dunn (2010) quantified salt fluxes of Coombabah Lake and determined the dominant mixing processes of this estuarine system and recommended further modelling studies. Subsequently, Ali, Zhang, and Lemckert (2009) carried out a hydrodynamic modelling study of this shallow intertidal system to understand the hydrodynamics of Coombabah Lake and similar systems; however, knowledge of sediment dynamics within the system is still poor.…”