Submarine ground-water discharge (SGD) is a widely overlooked source term for some dissolved constituents as they make their way to the nearshore marine environment (Burnett et al. 2001a, b, 2003a, b, 2006; Moore, 1996, 1999; Slomp and Van Cappellen, 2004; Swarzenski, 2004a, 2007; Taniguchi et al., 2002, 2006)