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Найдено документов в текущей БД: 2

    Land use impacts on river hydrological regimes in Northern Asia
/ A. Onuchin [et al.] // IAHS-AISH Publication. - 2009. - Vol. 331: Symposium JS.4 at the Joint Convention of the International Association of Hydrological Sciences, IAHS and the International Association of Hydrogeologists, IAH (6 September 2009 through 12 September 2009, Hyderabad) Conference code: 83573. - P163-170 . -

Кл.слова (ненормированные):
Afforestation -- Clear cuts -- Forest logging -- Hydrological regime -- Precipitation -- River catchments -- River flow -- Afforestation -- Clear cuts -- Forest logging -- Hydrological regime -- Precipitation -- River catchments -- River flow -- Catchments -- Decision making -- Groundwater -- Hydrogeology -- Land use -- Landforms -- Reforestation -- Runoff -- Stream flow -- Water resources -- Watersheds -- Rivers -- afforestation -- assessment method -- catchment -- clearcutting -- decision making -- environmental indicator -- human activity -- hydrological regime -- hydrology -- land cover -- land use change -- logging (geophysics) -- regional climate -- river flow -- runoff -- sustainability -- water quality -- watershed -- Siberia

Аннотация: River flow is vitally important to many human activities. River flow is influenced by climatic and land-cover changes. Land-use practices have a significant effect on water flow and quality. Land use can change surface runoff, which in turn can be used as an environmental indicator of a land use level of sustamability. Along with the regional climate, hydrological processes occurring in river basins in Siberia and mountainous Kyrgyzia are controlled by forest logging and afforestation. The method used to analyse annual river flow genesis to date allowed the onset of, and assessment of, the level of human activities in the watersheds. Moreover, river flow genesis can be used in land use decision-making. River flow reflects all watershed changes, which can have opposite effects, thus compensating for each other. This study confirmed that river flow changes in time, thus reflecting land cover changes in watersheds. Copyright В© 2009 IAHS Press.

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Держатели документа:
V. N. Sukachev Institute of Forest Siberian Branch, Russian Academy of Sciences, 660036, Academgorodok, Krasnoyarsk, Russian Federation
P. A. Gan Institute of Forest and Nut Plantation, Kyrgyzian Academy of Sciences, Kargachevaya rosha, 15, 720015, Bishkek, Kyrgyzstan

Доп.точки доступа:
Onuchin, A.; Burenina, T.; Gaparov, K.; Ziryukina, N.
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    Hydrological Consequences of Timber Harvesting in Landscape Zones of Siberia
/ A. Onuchin, T. Burenina, I. Pavlov // Environments. - 2017. - Vol. 4, Is. 3. - Ст. 51, DOI 10.3390/environments4030051. - Cited References:58. - Government of Krasnoyarsk Territory according to the research project NO 16-44-242145. . - ISSN 2076-3298
РУБ Agricultural Engineering
Рубрики:
WATER-YIELD REDUCTION
   CHINA
Кл.слова (ненормированные):
Siberia -- West Sayan -- Angara River -- timber harvesting -- clear-cut -- runoff -- water balance

Аннотация: Despite a large number of publications covering various aspects of the influence of climatic factors on runoff, this direction in hydrological research acquires a new meaning in connection with global climate change and the increase in anthropogenic press on river systems. The authors of this work focused on the impact of anthropogenic factors on river runoff. Many rivers of Siberian taiga drain areas have experienced a dramatic land-cover change, with a decrease in overall forest area and a relative increase in deciduous trees. Land cover change in forest catchments impact water balance and accordingly, river flow. The study areas, the West Sayan and Northern Angara regions located in Central Siberia, are now a mosaic of forest regeneration sites including both post-human and post-fire regeneration patterns. Data of our own hydrological experiments conducted on clear cuts of different ages and reference materials for regular hydrological observations were analyzed. Dynamics of river flow under influence of timber harvesting were studied for 11 river basins in different landscape zones of Siberia. The studies showed that, in Siberia, forest cover changes lead to either reduction of, or increase in water yield depending on forest structure and climate. Dynamics of river flow after forest logging differ for continental and humid climates. Where precipitation is excessive, water yield increases twice that of control plots during the first several post-cutting years, due to reduction of transpiring phytomass. It takes 30-40 years and sometimes even over 50 years, depending on forest succession trajectories, for water yield to recover to the pre-cutting level. In an extremely continental climate, extensive forest cutting results in decreasing water yield during the first post-clearcutting years, because wind activity increases and enhances snow evaporation on vast clear cuts. Water yield exhibited an average annual decrease of 0.5-1.0 mm during the first two decades after cutting, i.e., until when clear cuts began to regenerate. With further development of forest vegetation, water yield increased by 1.5-3 mm annually. Obtained results show that at the regional level in conditions of anthropogenic press on the forests at the catchments of medium and small rivers, the climatic trends are offset by the felling and subsequent reforestation dynamics at clear cuts.

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Держатели документа:
Russian Acad Sci, Forest Siberian Branch, VN Sukachev Inst, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Onuchin, Alexander; Burenina, Tamara; Pavlov, Igor; RFBR; Government of Krasnoyarsk Territory [16-44-242145]
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