Peak flow responses and recession flow characteristics after thinning of Japanese cypress forest in a headwater catchment
Peak flow responses and recession flow characteristics after thinning of Japanese cypress forest in a headwater catchment
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DOI：
10.3178/hrl.6.35
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发表时间：
2012
影响因子：
1.1
通讯作者：
B. Dũng;T. Gomi;S. Miyata;R. Sidle
中科院分区：
文献类型：
--
作者：
B. Dũng;T. Gomi;S. Miyata;R. Sidle
我们评估了森林间伐对日本三重县水源集水区暴雨径流的洪峰流量和衰退特征的影响。在集水区M5，58.3%的茎被删除，而集水区M4作为对照集水区保持未处理。从2004年6月至2007年1月，对疏伐前（113起事件）和疏伐后（103起事件）的暴雨降水和径流进行了监测。基于M5和M4之间的配对集水分析，削薄后峰流量没有显著增加。衰退常数K增加，而降雨径流衰退时间没有显着差异，前和后间伐期。风暴过程线衰退往往是渐进的（即，较高的K值），由于在间伐后增加有效土壤水分与较高的净降水量和减少蒸散。由于在间伐过程中土壤扰动最小，因此峰值流量没有变化。我们在成对集水区的过程线分析表明，变薄可能会改变特定的内部水文路径，如地下水流和地下水流。
We evaluated the effects of forest thinning on peak flow and recession characteristics of storm runoff in headwater catchments at Mie Prefecture, Japan. In catchment M5, 58.3% of stems were removed, whereas catchment M4 remained untreated as a control catchment. Storm precipitation and runoff was monitored from June 2004 to January 2007 for the pre-thinning period (113 events) and from March 2007 to June 2009 for post-thinning (103 events). Based on paired-catchment analysis between M5 and M4, volumes of peak flow did not increase significantly after thinning. Recession constant K increased, while recession time of storm runoff did not differ between pre- and post-thinning periods. Storm hydrograph recession tended to be more gradual (i.e., higher K values) after thinning due to increases in available soil water associated with higher net precipitation and decreased evapotranspiration. The lack of changes in peak flow can be attributed to the minimal soil disturbance during thinning. Our hydrograph analysis in paired catchments indicates that thinning may alter specific internal hydrological pathways, such as subsurface flow and groundwater flow.