Odpływ podziemny w małych zlewniach górskich Sudetów
Groundwater runoff in small catchments of the Sudety Mountains

Summary/Abstract: The aim of the paper was to identify groundwater runoff in small mountain catchments draining crystalline rocks and compact sedimentary rocks. The research consisted of field measurements taken in the hydrogeological year 2013 in four test catchments (Machowski Stream, Inflow at the foot of Mount Grodziec, Podgórna, Mostowy Stream) with areas up to 4.5 km2 .The measurements were the basis for the calculation of total, underground and spring runoff, the ratio of spring runoff in groundwater runoff, groundwater recharge coefficient and spring recharge coefficient. The results indicate that crystalline rocks have a lower storage capacity but a higherconductivity than compact sedimentary rocks. The subsurface runoff coefficient was from 11 to 20% of precipitation and 57% of groundwater runoff is directed towards river beds (linear drainage). At the same time, small mountain catchments are the recharge area. The calculated values show that ca. 20% of groundwater is present in deeper circulation (in the regional circulation process) and recharge the lower located river systems. Groundwater renewable resources for the whole area (14.9 km2 ) were 5974 m3 •d–1.

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