Wieloletnia zmienność odpływu z małej zlewni rzecznej w regionie Puszczy Kozienickiej

Kozienice Forest (central Poland) belongs to very valuable areas from touristic and ecological point of view. Water resources are important factor of further development of this region. Analysis of 49−year (1963−2011) annual and seasonal rainfall and runoff characteristics from a small (82 km²) catchment of Zagożdżonka River, with forestation ratio of 0.40, indicated a statistically significant decrease for six of the nine considered parameters. Mann−Kendall test was used for trend analysis. Decreased trend was indicated for annual runoff and annual runoff coefficient, median discharge, summer half−year runoff coefficient, median summer discharge and for low mean 30−day discharge. No trend was detected for annual precipitation and summer half year precipitation nor for summer half year runoff.