Impact of climate change on runoff from a mid-latitude mountainous catchment in central Japan

被引:28
|
作者
Shinohara, Yoshinori [1 ]
Kumagai, Tomo'omi [1 ]
Otsuki, Kyoichi [1 ]
Kume, Atsushi [2 ]
Wada, Naoya [3 ]
机构
[1] Kyushu Univ, Sasaguri, Fukuoka 8112415, Japan
[2] Kyushu Univ, Ashoro, Hokkaido 0893705, Japan
[3] Toyama Univ, Ctr Far Eastern Studies, Toyama 9308555, Japan
关键词
stochastic processes; greenhouse warming; water balance; snowmelt; snow hydrology; temperate forest; WATER-CONTROLLED ECOSYSTEMS; ENERGY-BALANCE; SOIL-MOISTURE; SNOW INTERCEPTION; BOREAL FOREST; RIVER-BASIN; EVAPORATION; ACCUMULATION; MODEL; TEMPERATURE;
D O I
10.1002/hyp.7264
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
Hydrologic balance in high-altitude, mid-latitude mountain areas is important in terms of the water resources available to associated lowlands. This study examined how current and historical shifts in precipitation (P) patterns and concurrent increases in temperature (T) affected runoff (Q) and other hydrologic components in a mid-latitude mountain catchment of central Japan, using a combination of long-term data and a simplified hydrologic model, along with their stochastic treatment. The availability of intensive meteorological and hydrological data from the period 1997-2001 allowed the derivation of key relationships for the Current climate that tie the forcing term to the parameters or state variables. By using the data recorded in the period 1965-2001, the force for driving the historical simulation was generated. Based on this model and historical shifts in P and T, the probability density functions of Q (pdf(Q)) was computed. A main novelty in this study is that such a stochastic representation, which is useful for considering the influence of projected shifts in environmental factors on the hydrologic budget, was provided. Despite the large increase in the rate of T in winter and spring, pdf(Q) in spring and summer varied appreciably during the time studied mainly because of all increase in snowmelt. An interannual change in whole-year Q was robust to shifts in T because while Q in spring increased, in summer it decreased, implying a crucial effect of global warming on mountain hydrologic regimes is change in the timing of Q. Copyright (C) 2009 John Wiley & Sons, Ltd.
引用
收藏
页码:1418 / 1429
页数:12
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