| 摘要: |
| 【目的】探讨北京密云水库集水区油松人工林的生态水文过程和影响机理。【方法】基于2006-05-10的21场降雨和气象及林分结构资料，用修正的Gash林冠截留模型对油松人工林林冠截留量进行模拟。【结果】北京密云油松人工林林冠截留量、树干茎流量和穿透雨量的模拟值分别为57.33，1.03和229.51 mm，林冠截留量和树干茎流量的模拟值分别比实测值减小12.6和0.39 mm，相对误差分别为18.02%和27.46%，穿透雨量模拟值高于实测值13.17 mm，相对误差为6.09%；累计林冠截留量模拟值小于实测值，累计林冠截留量相对误差最小值为6%，最大值为32.64%，相对误差在20%～30%的占76.2%，平均累计林冠截留相对误差为25.2%。【结论】模型可以较好地模拟北京密云油松人工林的累计林冠截留量，但模型在本试验区域油松林中应用时，模拟出的累计林冠截留量应加上25.2%的实测林冠截留量值加以校正。 |
| 关键词: 北京密云 油松人工林 修正的Gash模型 林冠截留 |
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| 基金项目:环保公益性行业科研专项（200809084）；国家林业局林业公益性行业科研专项（201104005） |
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| Canopy interception simulation of pine plantation in Miyun of Beijing |
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| Abstract: |
| 【Objective】The study explored the eco-hydrological processes of pine plantation in Miyun reservoir watershed of Beijing and its mechanism.【Method】In this paper,revised Gash canopy interception model was applied to simulate the canopy interception amount of Pine plantation based on the 21 field rainfall data,weather information and forest structure data from May to October in 2006.【Result】The total amounts of canopy interception,trunk runoff and throughfall were 57.33,1.03 and 229.51 mm.The simulated values of canopy interception and trunk runoff decreased by 12.6 mm and 0.39 mm respectively compared with the measured value,with the relative error being 18.02% and 27.46%.The simulated values of throughfall was higher than the measured value through 13.17 mm,with the relative error being 6.09%.The simulated values of cumulative amount of canopy interception was less than the measured value,with minimum relative error being 6%,maximum 32.64%,76.2% between 20%-30% and average 25.2%.【Conclusion】Model could better simulate cumulative amount of canopy interception of pine plantation in Miyun of Beijing.However when the model was applied in pine plantation of this area,the simulated values of cumulative amount of canopy interception should add 25.2% of the measured value to achieve accuracy. |
| Key words: Beijing Miyun pine plantation revised Gash model canopy interception |
