Modeling of the flood pulse in the lake Boa (colombian Amazon) ; Modelización del pulso de inundación en el lago Boa (Amazoníoa colombiana)

Based in the hydrologic characteristics, several models created with the Stella language were set out to explain the physical andchemical functioning of the Lake Boa, a meandric lake of the River Metá located in the Middle Caquetá Basin at the Colombian Amazon. The first model exhibited the changes in the water column level due to the regional flood pulse. The other models considered the effects that the hydrological pulse causes over the chemical variables in the lake, especially on total phosphorus (TP) and dissolved organic carbon (DOC). The models revealed that the flood pulse was the main force that modified the chemical and physical lake characteristics; however during time that lake is disconnected from the river, the lake gained chemical autonomy and some elements were re-suspended from the sediments, or they were affected by other processes not measured in this study like primary production, bacterial production, and excretion. The development of the models for the TP and the DOC had in consideration the fact that each one of these substances has a determined pattern of movement in the aquatic ecosystem. Some observations with respect to the utility of the models developed in the prediction of the dynamics of the Lake Boa are included. ; Se proponen varios modelos basados en la simbología Stella que explican, a partir de sus características hidrológicas, el funcionamiento físico y químico del lago Boa, un meandro del río Metá localizado en la cuenca media del río Caquetá en la Amazonía colombiana. El primer modelo se refiere al aumento de volumen de agua en el lago como reflejo del pulso de inundación en la región. Los demás modelos tratan de los efectos que provoca dicho pulso hidrológico sobre las variables químicas del agua en el lago, con especial referencia al fósforo total (PT) y al carbono orgánico disuelto (COD). La modelización permitió determinar que el pulso de inundación es el principal modificador de las características físicas y químicas, pero que en la época de desconexión del río con el ...