TY - JOUR
T1 - A model to estimate annual forest evapotranspiration in Japan from mean annual temperature
AU - Komatsu, Hikaru
AU - Maita, Eiichi
AU - Otsuki, Kyoichi
N1 - Funding Information:
We would like to thank Dr. Tomonori Kume (Kyushu University, Japan) and Dr. Shinji Sawano (The University of Tokyo, Japan) for fruitful discussion. Thanks are also due to the editor and two anonymous reviewers, whose comments greatly improved this manuscript. This research has been supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Scientific Research (#17380096 and #18810023) and by funds from Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (Type B-3; 18441).
PY - 2008/1/15
Y1 - 2008/1/15
N2 - 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 (°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.
AB - 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 (°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.
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U2 - 10.1016/j.jhydrol.2007.10.006
DO - 10.1016/j.jhydrol.2007.10.006
M3 - Article
AN - SCOPUS:36849074670
SN - 0022-1694
VL - 348
SP - 330
EP - 340
JO - Journal of Hydrology
JF - Journal of Hydrology
IS - 3-4
ER -