Making use of the cartographic-geomorphological method, a case study of the hydrographic confluence at Sielpia made it possible to identify changes in the river and hydrographic networks connected with the development and decline of the Old Polish Industrial District, whose functioning relied on the use of hydropower in iron metallurgy. The formation and disappearance of artificial industrial reservoirs and canals, the drainage networks, and the appearance of catastrophic flash floods as a result of failures of hydrotechnical structures have been reflected in cartographic materials, land relief, and sediments.
The article describes 19 erratic boulders of the northwestern margin of the Holy Cross Mountains pointing to their Scandinavian source area. For each boulder, the location, the form of its protection, petrographic type, morphology, and the present and potential significance are also given.
The Suchedniów water reservoir is located in the central section of the River Kamionka in the northern part of the Holy Cross Mountains of central Poland. This area once belonged to the Old Polish Industrial District that, during the Middle Ages, was very intensively developed by iron metallurgy. Many forges and mills along the rivers used water power, which led to the construction of an anthropogenic, small-scale water retention system. At the beginning of the twentieth century many of these reservoirs were drained after the collapse of metallurgical activities. The present-day reservoir was built in 1974 and drained in 2017. Research into the drained basin has documented various forms and sediments, some of which record present-day depositional processes (fire proof clay layer, inland fan delta), while others represent the historical period (lacustrine sediments of older reservoirs). Traces of catastrophic events have been preserved as well; an assemblage of megaripples marks the sudden drainage caused by a dam break in 1974.
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