Exploring the effect of catchment morphology on streamflow characteristics with virtual experiments
Exploring the effect of catchment morphology on streamflow characteristics with virtual experiments
复制标题
通过虚拟实验探讨流域形态对径流特征的影响
DOI：
10.1016/j.jhydrol.2022.127606
复制
发表时间：
2022-02
影响因子：
6.4
通讯作者：
Han Dawei
中科院分区：
文献类型：
--
作者：
Zhang Jun;Dai Qiang;N;ing Nergui;Han Dawei
流域地貌特征对地表径流有重要影响，已被广泛应用于水文预报的经验公式中。以往的研究探讨了径流和地貌之间的关系，但大多是基于当地的观察，这是特定的网站和没有说服力的，被用作一个普遍的原则。在这里，我们采用了一个强大的方法，创建超过2000个虚拟集水区从英国的布鲁集水区使用训练有素的分布式模型，SHETRAN。虚拟集水区的分配范围内的坡度，排水长度和不同的形状与空间均匀降雨的值。通过计算单位线的洪峰时间和洪峰流量，探讨了流域地貌对产流的影响。研究结果与水文学原理一致，即坡度越大，达峰时间越短，峰值越高，而排水路径越长，达峰时间越长，峰值越低。我们发现，在英国官方使用的经验UH方程表示流域地貌差。此外，我们还发现，当接收到不同强度和时间模式的风暴时，径流特性也不同。本研究全面探讨地形对河川流量的影响，避免以往研究中因集水区限制及输入不同类型风暴所造成的问题。虽然它还没有形成一个普遍适用的方程，但更重要的是，它提供了一个可行的方法来研究不同流域的单位线与虚拟流域。
The surface flow is significantly affected by catchment geomorphological characteristics, which have been widely used in the empirical equations in hydrograph predictions. Previous studies have explored the relationship between streamflow and geomorphology however mostly based on local observations, which are site-specific and unconvincing to be used as a universal principle. Here we adopted a robust approach by creating over 2000 virtual catchments from the Brue catchment in the UK using a well-trained distributed model, SHETRAN. The virtual catchments were allocated with a range of values in slope, drainage length and different shapes with a spatially uniform rainfall. We calculated the time to peak and the peak streamflow of unit hydrographs to explore the effect of catchment geomorphology on streamflow generation. The results present a consistent agreement with hydrological principles, i.e. shorter time to peak and higher peak values are observed with larger slope while longer time to peak and lower peak are experienced with longer drainage path. It was found that the shape of catchments can affect the streamflow characteristics. We found the officially used empirical UH equation in the UK represent the catchment geomorphology poorly. In addition, we found the streamflow properties are different when receiving varied intensity and temporal pattern of the storms. This study comprehensively explores the effect of geomorphology on streamflow avoiding the issues caused by catchment limitations in previous studies and imported different types of storms. Although it is away from generating an equation that can be generally adopted, more importantly it provides a feasible approach to investigate the unit hydrograph for different catchments with the virtual catchments.
登录
查看更多内容
DOI：
--
发表时间：
1932
期刊：
--
影响因子：
--
作者：
L. K. Sherman
通讯作者：
L. K. Sherman
影响因子：
4.3
作者：
Rong Zhang;C. Santos;Madalena Moreira;P. Freire;J. Corte-Real
通讯作者：
Rong Zhang;C. Santos;Madalena Moreira;P. Freire;J. Corte-Real
影响因子：
6.4
作者：
V. Gupta;Oscar J. Mesa
通讯作者：
V. Gupta;Oscar J. Mesa
影响因子：
6.4
作者：
M. Weiler;J. McDonnell
通讯作者：
M. Weiler;J. McDonnell
影响因子：
3.3
作者：
R. Rigon;Marialaura Bancheri;G. Formetta;A. de Lavenne
通讯作者：
R. Rigon;Marialaura Bancheri;G. Formetta;A. de Lavenne