The study deals with the analysis of hydrological conditions dynamics of MtIbb soil within melioration object Piwonia Górna I localized in Piwonia river valley on Łęczyńsko-Włodawski Lake District. Results achieved during hydrometric and soils survey made during vegetation periods of 2004–2007 were subject to analysis. The object that disposes water resources exclusively from atmospheric precipitations, despite of abundant summer rainfalls after long drought periods, was characterized by a slight increase of water surface level. The water surface level is associated with melioration ditches system. Regardless of unfavorable meteorological parameters and bad condition of melioration devices, no water deficiency in the soil was present.

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