Estimate of the drainage water behaviour in shallow lakes

A theoretical estimate of the explicit time dependence of the drainage water in shallow lakes is proposed as an important contribution for understanding the lake dynamics. This information can be obtained applying the mathematical techniques largely used in fitting experimental data, as a sum of Lorentzian functions. These functions were chosen because their centre and width yield a good description of the water basin behaviour. The coefficients of these functions are extracted using results of calculated data for the state variables describing the shallow West Lake, Hangzou. This procedure can also be applied to other shallow lakes generating information about their drainage basin, one of the most important parameters to describe their micrometeorological behaviour. One concludes this work emphasizing the relevance of the explicit time dependence of the drainage variables. This is important to simulate the state functions. It is also necessary to have measured data to validate this approach.