Effects of changes in canopy interception on stream runoff response and recovery following clear-cutting of a Japanese coniferous forest in Fukuroyamasawa Experimental Watershed in Japan
Effects of changes in canopy interception on stream runoff response and recovery following clear-cutting of a Japanese coniferous forest in Fukuroyamasawa Experimental Watershed in Japan
复制标题
日本袋山泽实验流域日本针叶林砍伐后冠层截留变化对溪流径流响应和恢复的影响
DOI：
10.1002/hyp.14177
复制
发表时间：
2021
影响因子：
3.2
通讯作者：
Suzuki Masakazu
中科院分区：
文献类型：
--
作者：
Oda Tomoki;Egusa Tomohiro;Ohte Nobuhito;Hotta Norifumi;Tanaka Nobuaki;Mark B Green;Suzuki Masakazu
了解森林更新过程中蒸散量的变化，对于预测森林采伐后径流和恢复的变化是至关重要的。林冠截留是蒸散的重要组成部分，但由于观测有限，林冠截留在林木采伐后再生长过程中的变化及其对径流的影响尚不清楚。这项研究的目的是研究冰川变化对采伐后再生的日本雪松和日本柏林的长期径流的影响。这项研究是在日本福山泽实验流域的两个1公顷的成对水源集水区进行的。集水区100%被日本针叶人工林覆盖，其中一处在1999年被100%砍伐，当时该林已有70 树龄。在经过处理的集水区，采伐后第二年的年径流量增加了301 mm/年(占降雨量的14%)，而在幼龄更新林中，与未采伐的估计径流量相比，12-14 年的年径流量仍高出185 mm/年(占降雨量的7.9%)。采伐后冰量变化为−358 mm/年，占降雨量的17%；与采伐前相比，12-14年生再生林的冰量变化为−168 mm/年，占降水量的6.7%。各季节径流量均呈增加趋势，冰川变化是整个观测期内各季节蒸散量变化的主要部分。这些结果表明，Ic的变化是这片针叶林采伐后径流响应和随后径流恢复的主要原因。
Understanding changes in evapotranspiration during forest regrowth is essential to predict changes of stream runoff and recovery after forest cutting. Canopy interception (Ic) is an important component of evapotranspiration, howeverIcchanges and the impact on stream runoff during regrowth after cutting remains unclear due to limited observations. The objective of this study was to examine the effects ofIcchanges on long‐term stream runoff in a regrowth Japanese cedar and Japanese cypress forest following clear‐cutting. This study was conducted in two 1‐ha paired headwater catchments at Fukuroyamasawa Experimental Watershed in Japan. The catchments were 100% covered by Japanese coniferous plantation forest, one of which was 100% clear‐cut in 1999 when the forest was 70 years old. In the treated catchment, annual runoff increased by 301 mm/year (14% of precipitation) the year following clear‐cutting, and remained 185 mm/year (7.9% of precipitation) higher in the young regrowth forest for 12–14 years compared to the estimated runoff assuming no clear‐cutting. TheIcchange was −358 mm/year (17% of precipitation) after cutting and was −168 mm/year (6.7% of precipitation) in the 12–14 years old regrowth forest compared to the observedIcduring the pre‐cutting period. Stream runoff increased in all seasons, and theIcchange was the main fraction of evapotranspiration change in all seasons throughout the observation period. These results suggest that the change inIcaccounted for most of the runoff response following forest cutting and the subsequent runoff recovery in this coniferous forest.