This paper presents the transformation of the hydrographic network of the middle section of the river Peony covering at microcatchment joint sosnowickich. The analysis was based archival topographic maps of the nineteenth and twentieth centuries. The first civil works executed during the interwar period included the construction of fish ponds and a system of ducts to water them. As a result of the work carried out in the village Sosnowica established 25 pond, currently function 11. Major changes in the economy in the area of joint Sosnowica occurred in connection with the construction of Wieprz–Krzna Canal, where in the 60’s upgraded almost all the ponds. Changed the source of water supply and water management system of the system of independent bead canal. In 1963, as a result of dehydration of the project was building drainage Piwonia-Uhnin. Inventoried length of the water in 2011 was: River Piwonia – 2.9 km, KWK – 3.0 km, furrows – 11 km, ditches joint –30 km. The total length of the hydrographic network was 45 km in the catchment area of the ponds sosnowickie 28.7 km² which corresponds to a density of 1 km · km^–2.

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