A model to estimate annual forest evapotranspiration in Japan from mean annual temperature
A model to estimate annual forest evapotranspiration in Japan from mean annual temperature
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DOI：
10.1016/j.jhydrol.2007.10.006
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发表时间：
2008-01-15
影响因子：
6.4
通讯作者：
Otsuki, Kyoichi
中科院分区：
文献类型：
--
作者：
Komatsu, Hikaru;Maita, Eiichi;Otsuki, Kyoichi
在日本，森林地区通常位于城市和农业区的上游。因此，估计这些森林地区的年水量对水资源管理至关重要。为此目的，需要估计每年的森林蒸散量。基于43个流域水平衡数据集，建立了估算日本森林年蒸散量E的经验模型。模型将E表示为E (mm) = 31.4T（℃）+ 376，其中T为年平均气温。该模式对森林集水区观测到的E值进行了估算，相对于年降水量的平均误差为6%。由于降水的空间异质性，该误差与降水数据中的误差相当或小于。高质量的气温数据在日本普遍可用，因此该模型是一个实用的工具，用于估算森林地区的年水量，从而管理水资源。(c) 2007 Elsevier B.V.版权所有
In Japan, forested areas are usually located upstream of urban and agricultural areas. Estimating annual water yield from such forested areas is therefore crucial for water resources management. For this purpose, estimating annual forest evapotranspiration is required. We developed an empirical model for estimating annual forest evapotranspiration E in Japan based on 43 catchment water balance datasets summarized from earlier publications. The model formulated E as E (mm) = 31.4T (degrees C) + 376, where T is mean annual air temperature. This model estimated E observed in forest catchments with an average 6% error relative to incident annual precipitation. This error was comparable to or smaller than the error included in precipitation data due to the spatial heterogeneity of precipitation. High-quality air temperature data are commonly available in Japan, thus this model is a practical tool for annual water yield estimates from forested areas and therefore water resources management. (c) 2007 Elsevier B.V. All rights reserved.