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Hydrological modelling has long been recognised as an essential tool for understanding and predicting water dynamics, particularly in regions where long-term observational data are limited. In Latvia, significant advancements have been made in the development of hydrological models, with the METQ model family becoming one of the most widely applied for the simulation of runoff and groundwater level regimes. Initially developed in the 1980s, METQ has been continuously refined to improve its predictive capabilities,...

The research was carried out to examine the influence of tributary inflows on the hydrochemical properties of the Svete River, which traverses intensive agricultural regions. Sixteen monitoring sites were selected along the main channel and at major tributary junctions. Water samples were collected monthly from surface layers (0 5 cm) over a one-year period, and concentrations of total nitrogen, total phosphorus, and selected metals were evaluated. A multi-parameter probe and an inductively coupled plasma optical ...