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首页> 外文期刊>Journal of the American Water Resources Association >FOREST HARVESTING AND STREAMWATER INORGANIC CHEMISTRY IN WESTERN NORTH AMERICA: A REVIEW
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FOREST HARVESTING AND STREAMWATER INORGANIC CHEMISTRY IN WESTERN NORTH AMERICA: A REVIEW

机译：北美西部的森林采伐和流域无机化学：回顾

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摘要

The solution chemistry of forested streams primarily in western North America is explained by considering the major factors that influence this chemistry - geological weathering; atmospheric precipitation and climate; precipitation acidity; terrestrial biological processes; physical/chemical reactions in the soil; and physical, chemical, and biological processes within streams. Due to the complexity of all these processes and their varying importance for different chemicals, stream water chemistry has exhibited considerable geographic and temporal variation and is difficult to model accurately. The impacts of forest harvesting on stream water chemistry were reviewed by considering the effects of harvesting on each of the important factors controlling this chemistry, as well as other factors influencing these impacts - extent of the watershed harvested, presence of buffer strips between streams and harvested areas, nature of post-harvesting site preparation, revegetation rate following harvesting, pre-harvesting soil fertility, and soil buffering capacity. These effects have sometimes reinforced one another but have sometimes been counterbalancing or slight so that harvesting impacts on stream water chemistry have been highly variable. Eight major knowledge gaps were identified, two of which - a scarcity of detailed stream chemical budgets and knowledge of longitudinal variation in stream chemistry - relate to undisturbed streams, while the remainder relate to forest harvesting effects.
机译：通过考虑影响该化学反应的主要因素来解释主要在北美西部的森林溪流的溶液化学性质。大气降水和气候；沉淀酸度陆地生物过程；土壤中的物理/化学反应；以及溪流中的物理，化学和生物过程。由于所有这些过程的复杂性以及它们对不同化学物质的重要性的变化，溪流水化学已表现出相当大的地理和时间变化，并且难以准确建模。通过考虑采伐对控制该化学过程的每个重要因素的影响以及影响这些影响的其他因素（包括分水岭的范围，溪流和收获之间的缓冲带的存在），回顾了森林采伐对溪流水化学的影响。地区，收获后场地准备的性质，收获后的植被恢复率，收获前的土壤肥力和土壤缓冲能力。这些影响有时会彼此增强，但有时会达到平衡或轻微，因此收获对溪流水化学的影响变化很大。确定了八个主要的知识差距，其中两个-缺乏详细的河流化学预算和关于河流化学纵向变化的知识-与未受干扰的河流有关，而其余与森林收获效应有关。

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