Assessment of the tidal currents and pollutants dynamics associated with shrimp aquaculture effluents in SAMARE coastal lagoon (NW Mexico)

Abstract

The pollutant dispersion induced by the tidal hydrodynamics was investigated through a modified model in Santa María-La Reforma coastal lagoon, a body water that receives effluents containing chemicals that are used in shrimp aquaculture. Maxima tidal currents (0.7 ms À1 ) were predicted within the main channel. Residual currents, of the order of 0.01 ms À1 , were also predicted. The hypothetical pollutant, released at four selected sites that receive effluents from shrimp aquaculture and agriculture within the lagoon, spread towards the northern and southern inlets. The advection and diffusion processes allow the pollutant in most of the cases, to reach the inlets in about 120 h. The spreading of the pollutant in the coastal lagoon seems to be modulated by the tidal velocity fields. The presence of an area where tidal currents converge in the eastern part of Talchichitle Island suggests that a potential accumulation of pollutants occurs in this site.

Lead, cadmium and mercury in the blood of the blue-footed booby (Sula nebouxii) from the coast of Sinaloa, Gulf of California, Mexico

“…In the Gulf of California, agriculture, aquaculture, mining, and harbor activities result in the transport of materials from the watershed to coastal areas (Frías-Espericueta et al, 2014;Montaño-Ley and Paéz-Osuna, 2012;Páez-Osuna and Osuna-Martínez, 2015;Ruiz-Fernández et al, 2009). In Sinaloa, the occurrence of lead (Pb), cadmium (Cd) and mercury (Hg) has been reported in coastal organisms (Frías-Espericueta et al, 2014;Ruelas-Inzunza and Páez-Osuna, 2007;Ruelas-Inzunza et al, 2011).…”

Effect of shrimp farm effluent on water and sediment quality parameters off the coast of Sonora, Mexico

“…Globally, several studies have been conducted on the effect of aquaculture discharges on the receiving water bodies (Molnar et al 2014, Suárez-Abelenda et al 2014. In Mexico, however, few such studies have been carried out (Páez-Osuna 2001), especially in the northwestern part of the country where most of the shrimp farms are located (Páez-Osuna et al 2003, Montaño-Ley andPáez-Osuna 2014).…”

“…A nivel mundial se han realizado estudios relacionados con el efecto de descargas acuícolas sobre los cuerpos de agua receptores (Molnar et al 2014, Suárez-Abelenda et al 2014. En México, sólo se han realizado algunos estudios (Páez-Osuna 2001), de los cuales los que corresponden al noroeste del país, que es donde mayormente se ha desarrollado la acuicultura, son escasos (Páez-Osuna et al 2003, Montaño-Ley y Páez-Osuna 2014.…”

Sediment dynamics in a complex coastal lagoon system of the Gulf of California

“…The bed load transport modeling, in flow models in which the transport is parameterized as a function of the depth averaged velocities, has been given by Huthnance (1982); Hulsher (1993); Schuttelaars and De Swart (1996); Van Rijn (1993); Montaño-Ley (2003); Montaño and Carbajal (2008); Carbajal and Montaño (1999) and Carbajal and Montaño (2001). The volumetric sediment flux S b = (S bx , S by ) in the active layer, given by Van Rijn (1993) is:…”