Estimation and comparison of bottom snowmelt at an open and a forest site for a snow cover period: -a study of bottom snowmelt (2)-

摘要

In the past, surveys on bottom snowmelt have been conducted relatively often. However, since it is not easy to distinguish between bottom snowmelt and that caused by other factors, long-term surveys or studies have been limited to certain severely cold areas. And it has been vet), difficult to estimate how the bottom snowmelt affects fiver runoff. In the meantime, there have been few surveys on bottom snowmelt in forestland, a predominant part of most mountainous basins. By applying a heat balance-based calculation method of bottom snowmelt at an open site and a deciduous forest site for a snow-covered period, changes m daily bottom snowmelt were estimated, thereby clarifying the different amounts of bottom snowmelt at the two sites. Furthermore, a snowfall simulation was conducted, evaluating how snow depth affects bottom snowmelt, The simulated result qualitatively matched the surveyed one.