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首页> 外文期刊>Journal of the American Water Resources Association >A Water Yield-Oriented Practical Approach for Multifunctional Forest Management and its Application in Dryland Regions of China
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A Water Yield-Oriented Practical Approach for Multifunctional Forest Management and its Application in Dryland Regions of China

机译：面向水产量的多功能森林管理实践方法及其在中国干旱地区的应用

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摘要

Mountainous forest areas are vitally important for water supply in dryland regions which suffer from high erosion risk and severe water shortage. Massive afforestation, mainly for erosion control, may reduce the water yield and threaten local water supply security. Moreover, many over-dense forests due to a strict logging ban policy have produced remarkably negative impacts for both forests (e.g., low timber quality, restricted natural regeneration, and high stand instability) and water yield. To satisfy the rapidly increasing demands on water supply and other services, a practical approach for managing forest stands in a multifunctional way, which particularly addresses water yielding, is urgently required. For this purpose, we integrated the existing knowledge and experience, designed an ideal stand structure to represent multifunctional forest (MFF) and determined its key parameters (a ground coverage of >0.7, a canopy density around 0.7, and an H/DBH ratio (tree height [m] to the diameter at breast height [cm]) of <0.7). Moreover, a decision process for MFF stand management was recommended as: (1) investigating the site quality; (2) identifying the site-specific main forest functions; (3) quantifying the stand structure; (4) diagnosing the stand structure by comparing with the ideal one; and (5) arranging the functions/structure-oriented management measures. In this way, the water-yielding function can be improved and meanwhile other forest functions can be promoted.
机译：山区森林对干旱风险高，缺水严重的干旱地区的供水至关重要。主要用于控制侵蚀的大规模造林可能会降低水的产量并威胁当地的供水安全。此外，由于严格的伐木禁令政策，许多高密度森林对森林（例如，木材质量低，自然再生受限制以及林分不稳定）和水产量均产生了显着的负面影响。为了满足对供水和其他服务的迅速增长的需求，迫切需要一种以多功能方式管理森林林的实用方法，特别是解决水的产生问题。为此，我们整合了现有的知识和经验，设计了一种代表多功能森林（MFF）的理想林分结构，并确定了其关键参数（地面覆盖率> 0.7，树冠密度约为0.7和H / DBH比（树高[m]到胸高[cm]）的直径<0.7）。此外，建议对MFF摊位进行管理的决策程序为：（1）调查场地质量； （2）确定特定地点的主要森林功能； （3）量化展位结构； （4）通过与理想支架的比较来诊断支架结构； （五）制定职能/结构导向的管理措施。这样，可以改善水的生产功能，同时可以促进其他森林功能。

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