Abstract
Seston fluxes in the dam of a Colombian tropical reservoir
Highlights
Reservoirs are forced systems (Gálvez et al, 1989), acting as a hybrid between the lakes and the river that fills; for these reason a reservoir is a forced system that is always in flux and never found in equilibrium with the functions of force (Thorton et al, 1990)
The ANOVA determined that the majority of material fluxes showed significant differences at the time and vertical profile except for total dissolved solid (TDS)
In general there are significant differences between samples which are associated with the variation of the thermal profile of the reservoir and the oscillation of the mixing depth, caused by the strong winds that occur in the area, despite this water column showed a stable thermal stratification since last May to end sampling on July (Figure 3)
Summary
Reservoirs are forced systems (Gálvez et al, 1989), acting as a hybrid between the lakes and the river that fills; for these reason a reservoir is a forced system that is always in flux and never found in equilibrium with the functions of force (Thorton et al, 1990). The variation of sedimentation rates of materials that enter and are produced in an aquatic ecosystem is evident in the sediment This compartment accumulates material dragged (allochthonous), or produced in the same body of water (autochthonous) and mineral (evaporites, clay, stone fragments or clastic materials, minerals formed within the water) or organic origin (organisms who dying, and dead bodies fragmented, excrement, organic matter flocculated, detritus allochthonous). The composition of these materials and their speed of accumulation in the sediment express the activity of the lake basin as a receiver and as a center of biological activity (Margalef, 1983). This variable can be evaluated as sediment flux (g.m-2.d-1), sedimentation speed (m.d-1) or removal rate (d-1) (Imboden and Lerman, 1978)
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