Comparative study determining the impacts of broadleaved and Needle leaved forest harvesting on hydrology and water yield: State of knowledge and research outlook

2020 ◽  
Keyword(s):  
Comparative Study ◽  
Forest Harvesting ◽  
Water Yield ◽  
Leaved Forest ◽  
Yield State

scholarly journals Spring Creek Representative and Experimental Watershed Project

2016 ◽  
Vol 92 (01) ◽  
pp. 43-46 ◽  
Author(s):  
Graham Hillman ◽  
Richard Rothwell
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Agricultural Land ◽  
Forest Harvesting ◽  
Water Yield ◽  
The Novel ◽  
Land Use Conversion ◽  
Basin Morphology ◽  
Effects Of Land Use ◽  
Northern Alberta

The Spring Creek Representative and Experimental Watershed Project was initiated in 1965 to understand the effects of land-use conversion from boreal forest to agricultural land on mid-size watersheds typical to northern Alberta. The initial project was deactivated in 1986 and the treatment was never completed. In 1991, Daishowa-Marubeni International Ltd. and the Alberta Department of Environmental Protection restarted the project with new objectives to determine the hydrologic effects of aspen harvesting and the hydrologic recovery of water yield post-harvest. The impacts of basin morphology and forest harvesting on water quality were also investigated. The objectives of this manuscript are to summarize the novel results and data collected for this project.

scholarly journals Effects of Selective Forest Harvesting on Organic Matter Inputs and Accumulation in Headwater Streams

2004 ◽  
Vol 21 (1) ◽  
pp. 19-30 ◽  
Author(s):  
David P. Kreutzweiser ◽  
Scott S. Capell ◽  
Frederick D. Beall
Keyword(s):  
Organic Matter ◽  
Headwater Streams ◽  
Canopy Cover ◽  
Basal Area ◽  
Experimental Period ◽  
Forest Harvesting ◽  
Riparian Buffers ◽  
Water Yield ◽  
Buffer Strips ◽  
Selective Harvesting

Abstract Organic matter inputs and accumulation were measured in streams of low-order forest watersheds across a gradient of selective harvesting with no protective riparian buffers assigned. Comparisons were made among sites in selection-cut (average 29% basal area removal), shelterwood-cut (average 42% basal area removal), diameter limit-cut (average 89% basal area removal), and undisturbed tolerant hardwood catchments. The diameter limit harvest was an intentionally high-disturbance treatment and is not a normal silvicultural prescription for tolerant hardwoods in Ontario. Time trend analyses were conducted to examine differences among sites over a pre- and postharvest experimental period. Selection-based harvesting at up to 42% basal area removal with no riparian buffers did not significantly alter average over-stream canopy cover, leaf litter and other organic matter inputs, benthic particulate organic matter accumulation, or woody debris abundance. Harvesting impacts on over-stream canopy cover and organic matter inputs appeared to be minimized by natural crown architecture (overlap in crowns of over-stream trees, residual mid-crown canopy) and by careful logging practices including retention of many immediate streamside trees (within a few meters of the stream channel) and avoidance of felling directly into the streams. Dissolved organic matter fluxes increased slightly for 1 year after harvest and were associated with increased water yield. At the diameter limit harvesting intensity (about 89% basal area removal), significant effects on organic matter inputs and accumulation in streams were detected. The results indicate that selective harvesting of hardwood forests at up to about 42% basal area removal can be conducted without causing significant reductions in organic matter inputs and accumulation in headwater streams, even without prescribed streamside buffer strips.

scholarly journals Impacts of forest changes on hydrology: a case study of large watersheds in the upper reaches of Minjiang River watershed in China

2012 ◽  
Vol 16 (11) ◽  
pp. 4279-4290 ◽  
Author(s):  
X. Cui ◽  
S. Liu ◽  
X. Wei
Keyword(s):  
Climate Change ◽  
Land Cover ◽  
Spatial Scales ◽  
Yangtze River Basin ◽  
Forest Harvesting ◽  
Water Yield ◽  
River Watershed ◽  
Minjiang River ◽  
Different Types ◽  
Hydrological Effects

Abstract. Quantifying the effects of forest changes on hydrology in large watersheds is important for designing forest or land management and adaptation strategies for watershed ecosystem sustainability. Minjiang River watershed, located in the upper reach of the Yangtze River basin, plays a strategic role in the environmental protection and economic and social well-being for both the watershed and the entire Yangtze River basin. The watershed lies in the transition zone from Sichuan Basin to Qinghai-Tibet Plateau with a size of 24 000 km2. Due to its strategic significance, severe historic deforestation and high sensitivity to climate change, the watershed has long been recognized as one of the highest priority watersheds in China for scientific research and resource management. The purpose of this review paper is to provide a state-of-the-art summary on what we have learned from several recently completed research programs (one of them known as "973 of the China National Major Fundamental Science" from 2002 to 2008). This summary paper focused on how land cover or forest change affected hydrology at both forest stand and watershed scales in this large watershed. Inclusion of two different spatial scales is useful, because the results from a small spatial scale (e.g. forest stand level) can help interpret the findings on a large spatial scale. Our review suggests that historic forest harvesting or land cover change has caused significant water yield increase due to reduction of forest canopy interception and evapotranspiration caused by removal of forest vegetation on both spatial scales. The impact magnitude caused by forest harvesting indicates that the hydrological effects of forest or land cover changes can be as important as those caused by climate change, while the opposite impact directions suggest their offsetting effects on water yield in the Minjiang River watershed. In addition, different types of forests have different magnitudes of evapotranspiration (ET), with the lowest in old-growth natural coniferous forests (Abies faxoniana Rehd. et Wils.) and the highest in coniferous plantations (e.g. Picea asperata Mast.) among major forest types in the study watershed. This suggests that selection of different types of forests can have an important role in ET and consequently water yield. Our synthesis indicates that future reforestation and climate change would likely produce the hydrological effects in the same direction and thus place double the pressure on water resource as both key drivers may lead to water yield reduction. The findings can support designing management strategies for protection of watershed ecological functions in the context of future land cover and climate changes.

scholarly journals Forest Harvesting and Water Management

1968 ◽  
Vol 44 (6) ◽  
pp. 5-12 ◽  
Author(s):  
W. W. Jeffrey
Keyword(s):  
Water Management ◽  
Resource Management ◽  
Land Tenure ◽  
Land Use Planning ◽  
Technical Problem ◽  
Forest Harvesting ◽  
Water Yield ◽  
Administrative Organization ◽  
Environmental Goals ◽  
Social Importance

Forest harvesting affects water management. Total water yield, flow regime and water quality are affected. Usually, in Western Canada, these effects — whether for good or ill — are accidental and are not taken into consideration in management. This is at least partly due to resource management people being resource oriented (technocentric) rather than society oriented (democentric) in their attitudes. Forest harvesting-water management interactions represent a technical problem of ultimate social importance. To cope with this problem requires coordination of resource uses, improved communication and administrative organization, more democentricity, expanded research into socio-economic factors, more attention to long-term environmental goals, examination of land tenure systems, more land use planning, re-orientation of resource management education, a broadening of social conceptual awareness, and increased professional staffing.

Author response for "Laminar distribution of cortical projection neurons to the pulvinar: A comparative study in cats and mice"

2020 ◽  
Author(s):  
Bruno Oliveira Ferreira de Souza ◽  
Éve‐Marie Frigon ◽  
Robert Tremblay‐Laliberté ◽  
Christian Casanova ◽  
Denis Boire
Keyword(s):  
Comparative Study ◽  
Author Response ◽  
Projection Neurons ◽  
Cortical Projection ◽  
Laminar Distribution
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