Hydropower dam implications and saltwater intrusion on a tropical estuary in the southern Gulf of Mexico
Cita: Alcérreca-Huerta, J.C., Callejas-Jiménez, M.E., Carrillo, L., Castillo, M.M.2018. Hydropower dam implications and saltwater intrusion on a tropical estuary in the southern Gulf of Mexico. International Conference on Marine Science: towards a sustainable ocean. Medellín, Colombia.
International Conference on Marine Science: towards a sustainable ocean
Periodo de realización: 2018/11/20 al 2018/01/01
Lugar(es) de estudio: Medellín, Antioquia, Colombia
Resumen: "Estuaries are highly productive ecosystems that form a transition between riverine and maritime environments. Salt-freshwater exchanges are influenced by tides, waves and freshwater discharge. In Tropical estuaries, periodic advances and retreats of the influx of saline water are dependent on seasonality as well as on episodic and intense river flows. Modifications upriver due to dam systems are among the stressors that might alter the hydrological regime in the river inducing changes in the estuarine environments and the adjacent coastal areas. In this regard, monthly field measurements for characterization of the seasonal behavior of the salt-water intrusion, temperature and water discharge in the upper-estuary of the Grijalva River in the southern Gulf of Mexico were conducted. Results of the analysis of a 4 dam-system are also presented in relation to the historical induced changes that could have influenced the estuarine environment: i) changes on mean annual wáter discharges, ii) general loss of seasonality and iii) threatening to the hydrologic regime related to the dam-system development. Management plans and policies associated to the modification of the hydrological regime and possible consequences to the estuarine environment are discussed. Implications on the changes on the current upper-estuary condition measured will be drawn, which aim to contribute to the better understanding of estuarine systems due to long-term anthropic perturbations motivated by hydropower developments."