Abstract
In this study, allometric relations between all parts of lake-catchment systems have been investigated. Inflow and outflow discharges were the main hydrological factors of terrestrial part of the system. Lake water chemistry was presented not simply as ion concentration, but as ion mass accumulated in the lake basin, taking into account the volume of water stored in the lake basin at that time. Redundancy analysis was used to determine the most significant relations between hydrometeorological factors and lake water chemistry. Power of scaling was calculated afterward. The obtained results showed the strongest relations between the following: inflow 2 (I2) and total phosphorus (TP), outflow and magnesium (Mg2+) and chlorides (Cl−), flushing time (Tf) and phosphate (PO4 3−), as well as precipitation (P) and calcium (Ca2+)—inverse relation. In most cases, negative allometry was observed. The most stable allometric relations occurred between I2 and TP, the least stable between Tf and PO4 3−. Negative allometry proved a dominant role of hydrological conditions in shaping lake water chemistry. The inverse relationship between P and Ca2+ resulted from the fact that Ca2+ originated from Cretaceous sediments weathering, not atmospheric input.
Highlights
Lake-catchment systems are two-dimensional and are composed of terrestrial and aquatic part
Where LI1, ionic load transported by the first inflow; LI2, ionic load transported by the second inflow; LO, ionic load transported by the outflow
The lowest concentration of Ca2? in inflow 1 and inflow 2 waters was observed in April (110 and 108 mg L-1, respectively), whereas the highest in September (176 and 167 mg L-1, respectively)
Summary
Lake-catchment systems are two-dimensional and are composed of terrestrial and aquatic part. Hydrochemical dynamic of a lake catchment area makes up an external load, shaping the direction and intensity of ionic translocation. These processes are consubstantial and affect each other. The power of connections between individual parts of lake-catchment systems subject to the scaling laws and may be presented with allometric theory. Hydrological dynamic of a catchment is a driving force of in-lake processes, e.g., flushing time, the degree and rate of ionic transformation (Muller et al 1998; Lee et al 2009; Liu et al 2011). Surface tributaries transport the loads of domestic sewage and agricultural practices shaping the quality of water in a large scale (Ravinda et al 2003)
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