Poland moves to renature rivers to reduce flood and drought risk

Decades of river regulation in Poland—straightening channels, draining wetlands and building dams—have altered the natural water‑retention capacity of river basins. Experts cite that regulated rivers now act like drainage ditches, accelerating runoff, deepening agricultural droughts and intensifying flood waves that threaten towns and farmland. Statistical data from the Central Statistical Office show that the peak of river‑bed engineering occurred in 2003, with 858.5 km of waterways modified, while the extent of such work fell to 47.4 km by 2023. Dr Kinga Krauze of the European Regional Centre for Ecohydrology (Polish Academy of Sciences) notes that “regulated rivers, very deeply cut into the landscape, have become simple drainage ditches.”

In response, Poland’s State Water Management authority now promotes river renaturation and “blue‑green infrastructure” as core elements of its water‑resource strategy. Restoring natural river courses is intended to improve groundwater recharge, revive wetlands that store water during rainstorms, and release it gradually during dry periods, thereby enhancing resilience to climate‑driven extremes.