Journal of Rainwater Catchment Systems
Online ISSN : 2186-6228
Print ISSN : 1343-8646
ISSN-L : 1343-8646
Snow Accumulation and Melt in Open and Forest Areas in a Snowy Temperate Region of Japan
Tomomichi HirataYoichi FujiharaKeiji TakaseEiji IchionShunsuke Chono
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ジャーナル フリー

2021 年 26 巻 2 号 p. 27-33

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  Understanding snowmelt characteristics in forest areas is essential for the effective use of water resources because forests cover most of the mountainous areas in Japan. However, most previous studies investigating the snowmelt characteristics in open and forest areas have been conducted in March or later in the spring. In Japan, few studies have analyzed the energy balance of the snowmelt over an entire winter season, including the severe winter months. We selected Ishikawa Prefecture as the study area to clarify the characteristics of the energy balance for snowmelt in open and forest areas over the entire period of snow cover. The reduction of shortwave radiation by the forest was small during the severe winter months between December and February. The amount of longwave radiation was greater by approximately 25−85 MJ m-2 day-1 in the forest, which is significantly higher than that observed in the open area. We found that there are cases in which the energy available for snowmelt in the forest is larger than that in the open area, and that forests had no effect in terms of slowing the snowmelt during the severe winter months.

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