Lake sediments will provide information about long-term hydrological variability and evolution of water quality. Quantification of runoff, meltwater and groundwater contributions to the hydrological budget will allow to test the effects of hydrological events on the aquatic ecosystem as well as help to disentangle these components archived in lake sediment records. Overall, the identification of the local components of the water balance and an integral approach of surface and subsurface flow modeling with water balance studies will provide assessments of past and future dynamics of water fluxes and water quality.