柏树林的间伐增加了地下径流,但减少了暴雨径流的峰值:一项渗湿计观测

IF 0.6 Q4 WATER RESOURCES Hydrological Research Letters Pub Date : 2019-01-01 DOI:10.3178/hrl.13.49
K. Kuraji, Mie Gomyo, A. Nainar
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引用次数: 10

摘要

为了实现有效的水资源管理,需要更好地了解疏林等森林管理措施引起的径流变化。我们在日本生态水文研究所犬山研究林的一个22年的柏树人工林中建立了匹配的(坡度为20°)62%间伐处理和草地控制渗湿计样地。径流(地表和地下)被引导到一个带有90°v形缺口堰出口的收集水箱中。在薄化处理前后进行了测量,并与草地对照进行了比较。2011年3月至2014年12月,每个月通过测量筒和秒表对地下径流进行人工测量,得出了18次减薄前和24次减薄后的观测结果。此外,通过水位数据记录仪连续记录了26组间伐前和24组间伐后的风暴事件测量数据。在间伐之后,地下径流和峰值暴雨径流分别变化了+133%和-80%。通过控制地质、土壤特征和水文路径,我们能够将这些结果分别归因于砍伐原木的蒸腾减少和地面阻力增加,这表明管理良好的高强度间伐可能有利于增加供水和控制洪水。然而,这只有在砍伐的原木沿着山坡上的等高线排列时才能实现。
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Thinning of cypress forest increases subsurface runoff but reduces peak storm-runoff: a lysimeter observation
Changes in runoff caused by forest management prac‐ tices such as thinning need to be better understood for effective water resource management. We established matched (20° slope) 62%-thinning treatment and grassland control lysimeter plots in a 22-year-old cypress plantation in the Inuyama Research Forest of the Ecohydrology Research Institute, Japan. Runoff (surface and subsurface) was directed into a collection tank with a 90° v-notch weir outlet. Measurements were made before and after the thin‐ ning treatment and were compared with grassland control. Monthly manual measurements of subsurface runoff (March 2011–December 2014) performed via a measuring cylinder and stopwatch yielded 18 pre-thinning and 24 post-thinning observations. In addition, 26 pre-thinning and 24 post-thinning sets of storm-event measurements were continuously recorded via a water level data logger. Fol‐ lowing thinning, subsurface runoff and peak storm-runoff changed by up to +133% and –80% respectively. By con‐ trolling the geology, soil characteristics and hydrological pathways, we were able to attribute these outcomes to reduced transpiration and increased ground resistance from felled logs respectively, suggesting that well-managed high-intensity thinning may be beneficial for increasing water supply and controlling floods. However, this is only achievable if felled logs are aligned along contour lines on the hillslopes.
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来源期刊
CiteScore
1.90
自引率
18.20%
发文量
9
审稿时长
10 weeks
期刊介绍: Hydrological Research Letters (HRL) is an international and trans-disciplinary electronic online journal published jointly by Japan Society of Hydrology and Water Resources (JSHWR), Japanese Association of Groundwater Hydrology (JAGH), Japanese Association of Hydrological Sciences (JAHS), and Japanese Society of Physical Hydrology (JSPH), aiming at rapid exchange and outgoing of information in these fields. The purpose is to disseminate original research findings and develop debates on a wide range of investigations on hydrology and water resources to researchers, students and the public. It also publishes reviews of various fields on hydrology and water resources and other information of interest to scientists to encourage communication and utilization of the published results. The editors welcome contributions from authors throughout the world. The decision on acceptance of a submitted manuscript is made by the journal editors on the basis of suitability of subject matter to the scope of the journal, originality of the contribution, potential impacts on societies and scientific merit. Manuscripts submitted to HRL may cover all aspects of hydrology and water resources, including research on physical and biological sciences, engineering, and social and political sciences from the aspects of hydrology and water resources.
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