Influence of river channel geometry in stream flow modelling and guidelines for field investigation

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題名:	Influence of river channel geometry in stream flow modelling and guidelines for field investigation
作者:	葉高次;Zhang, Hongbo;Zhang, Fan;Shi, Xiaonan;Zeng, Chen;Shih, Dong-Sin;Yeh, Gour-Tsyh;Joswiak, Daniel R.
貢獻者:	地球科學學院應用地質研究所
關鍵詞:	distributed hydrological model;river channel geometry;sensitivity analyses;Tibetan Plateau
日期:	2014-02-15
上傳時間:	2026-04-23 14:59:59 (UTC+8)
出版者:	John Wiley and Sons Ltd;Chichester: Blackwell Publishing Ltd
摘要:	摘要： Fully physics‐based, process‐level, distributed fluid flow and reactive transport hydrological models are rarely used in practice until recent years. These models are useful tools to help understand the fundamental physical, chemical, and biological processes that take place in nature. In this study, sensitivity analyses based on a mountain area river basin modelling study are performed to investigate the effect of river channel geometric characteristics on downstream water flow. Numerical experiments show that reduction in the river channel geometric measurement interval may not significantly affect the downstream water stage simulation as long as measurement accuracy at special nodes is guaranteed. The special upstream nodes include but are not limited to 1) nodes located close to the observation station, 2) nodes near the borders of different land covers with considerable riverbed roughness changes, 3) nodes at entering points of tributaries causing discharge jump and 4) nodes with a narrow cross‐section width that may control the flow conditions. This information provides guidelines for field investigation to efficiently obtain necessary geometric data for physics‐based hydrological modelling. It is especially useful in alpine areas such as the Tibetan Plateau where field investigation capability is limited under severe topography and climate condition. Copyright © 2013 John Wiley & Sons, Ltd. 其他題名： Hydrol. Process 出版者： Chichester: Blackwell Publishing Ltd 出版日期： 2014-02-15 出處： Hydrological processes, 2014-02, Vol.28 (4), p.2630-2638 資源來源： Wiley Online Library 版權： Copyright © 2013 John Wiley & Sons, Ltd. 版權： Copyright © 2014 John Wiley & Sons, Ltd. 識別號： ISSN: 0885-6087 識別號： EISSN: 1099-1085 識別號： DOI: 10.1002/hyp.9837
顯示於類別:	[應用地質研究所] 期刊論文

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