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Streamflow estimation for six UK catchments under future climate scenarios

机译:未来气候情景下英国六个流域的流量估算

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Possible changes in streamflow in response to climate variation are crucial for anthropologicanand ecological systems. However, estimates of precipitation under future climate scenarios arnnotoriously uncertain. In this article, rainfall time series are generated by the generalized lineanmodel (GLM) approach in which stochastic time series are generated using alternative climatenmodel output variables and potential evaporation series estimated by a temperature method.nThese have been input to a conceptual rainfall–runoff model (pd4-2par) to simulate the dailynstreamflows for six UK catchments for a set of climate scenarios using seven global circulationnmodels (GCMs) and regional circulation models (RCMs). The performance of the combinednmethodology in reproducing observed streamflows is generally good. Results of future climatenscenarios show significant variability between different catchments, and very large variabilitynbetween different climate models. It is concluded that the GLM methodology is promising, andncan readily be extended to support distributed hydrological modelling.
机译:流量响应气候变化可能发生的变化对于人类学和生态系统至关重要。但是,在未来气候情景下的降水估计却非常不确定。在本文中,降雨时间序列是通过广义线性模型(GLM)方法生成的,其中,使用替代气候模型输出变量和通过温度方法估算的潜在蒸发序列来生成随机时间序列。n这些已输入到概念性降雨-径流模型中(pd4-2par)使用七个全球环流模型(GCM)和区域环流模型(RCM)来模拟一组气候情景下英国六个集水区的日流量。组合方法在再现观察到的流中的性能通常很好。未来气候情景的结果表明,不同流域之间的变化很大,而不同气候模型之间的变化很大。结论是,GLM方法是有前途的,并且可以很容易地扩展以支持分布式水文建模。

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