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中国沙漠  2015 

黑河上游天涝池流域草地蒸散发模拟及其敏感性分析

DOI: 10.7522/j.issn.1000-694X.2014.00107

Keywords: 蒸散发,天涝池流域,模拟,草地,敏感性分析

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Abstract:

根据野外气象站观测资料,利用Penman、FAO-Penman、FAO-Penman-Monteith、Priestley-Taylor和FAO-Radiation等5个蒸散发模型模拟黑河上游天老池流域草地日尺度和小时尺度的蒸散发,对模拟值与观测值进行了比较,并进行了相关变量的敏感性分析。结果表明:在日尺度上,FAO-Penman-Monteith模型的模拟效果最好,FAO-Radiation模拟效果最差,其余3种模型的模拟效果较好;在小时尺度上,Priestley-Taylor模型的模拟效果最好,其余模型都不适合该地区草地小时尺度的潜在蒸散发模拟。模型输入参数对蒸散发模拟效果影响强弱顺序为辐射>气压>相对湿度>气温>风速。当地表辐射变动±10%时,模拟值变化幅度20%左右;在其他参数变动±10%时,模拟值变化幅度在8%以下,说明辐射以外的参数是模型模拟较不敏感因素。

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