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Siberian Journal of Forest Science

2014 year, number 1

Impact of Forest Harvesting and Forest Regeneration on Runoff Dynamics at Watersheds of Central Siberia

A.A. Onuchin, T.A. Burenina, N.V. Ziryukina, S.K. Farber
V.N. Sukachev Institute of Forest, Russian Academy of Sciences, Siberian Branch
Academgorodok, 50/28, Krasnoyarsk, 660036 Russian Federation
Keywords: Angara river region, forest logging, forest regeneration, hydrological regime, river catchments, water balance, precipitation, evaporation, river flow


In the paper disturbance of Angara river region forests were estimated and peculiarities of forest regeneration after logging and wild fires were analyzed. According to the landscape classification of the regional study, three groups of landscapes differencing on types of forest successions were developed. It was shown that water protective and water regulate functions of the Angara river region forests change under commercial forest harvesting. Comparisons of the inventory and hydrological data detected that hydrological consequences of commercial forest harvesting are dependent on climatic parameters and forest regeneration peculiarities. In the continental climate conditions, when forest regeneration is delayed, snow storms are more active, snow evaporation increases and runoff reduces. In the process of logging sites overgrown with secondary small-leaved forest, snow accumulation increases and runoff increases, exceeding the value of annual runoff at undisturbed watersheds.