Quantitative characteristic and qualitative transportation of bedload in experimental catchment of Wilczy Potok in Karkonosze Mts. in 1994-99
2002
Katrycz, M. (Uniwersytet Wroclawski, Wroclaw (Poland). Inst. Geograficzny)
In 1989 a measuring overflow was built on a small water-course in the East Karkonosze Mountains in order to determine the dynamics of flow and bedload transport. The data collected in a 0.99 square kilometers basin reveal that the bedload mass in valley river-beds is considerably bigger than in slope streams. It has been shown that the bedload transport process is different for the naturally afforested areas and in conditions of anthropopressure, in which the material transport increases drastically. The observed minor retention of bedload in river-beds and its fast renewal indicate that big precipitation and ablation stimulate quick bedload transport and renewal of its resources during the settling of the flood wave. Since the measurements commenced, an upward trend of bedload transport has been noticed, which results from the increasing influx of water into the basin as well as from the progressing anthropogenisation of the whole area. It has been noted that the main bedload mass is carried out of the basin during intensive summer rainfall, when floods are the biggest although they take place rarely: once in a few years. In all, the flowing water has carried from the basin area over 50 tons of river bedload, there of 8.8 tons by the slope stream system
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