The paper calculates the magnitude of water erosion and proposes optimal scenarios for changes in agricultural space to reduce its degrading effects. Three assumptions were made based on the principles of good agricultural practices. The study used publicly available high-resolution thematic layers and analysed climatic conditions, physiographic conditions, land use structure, and agrotechnical work directions. The magnitude of water erosion was estimated based on the USLE equation. The individual parameters of the model were developed using methods of computerised spatial data analysis. The results showed that almost 75% of the catchment area was affected by water erosion (with an intensity ranging from 0,001 to 308,595 Mg · ha–1 · year–1). Changing the direction of agricultural practices (from a slope-wise to a cross-slope arrangement) reduced soil loss by 13,64 Mg. Replacing corn and potatoes with spring oats and winter wheat reduced water erosion by 3,55 Mg. Simultaneous changes in field practices and crop selection reduced soil erosion by 15,85 Mg, while replacing some arable land with grassland reduced soil loss by 24,71 Mg, reducing the amount of soil material washed out of the field by as much as 73% compared to the baseline. The study showed that already adopting one anti-erosion measure, alongside good agricultural practices and measures to protect soil from water erosion can significantly reduce soil loss.