Critical depths for passage in braided rivers, Canterbury, New Zealand
作者:
M. Paul Mosley,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1982)
卷期:
Volume 16,
issue 3-4
页码: 351-357
ISSN:0028-8330
年代: 1982
DOI:10.1080/00288330.1982.9515978
出版商: Taylor & Francis Group
关键词: rivers;stream flow;fluvial morphology;water resources;recreational waters;fish;boats;Canterbury
数据来源: Taylor
摘要:
Riffles and points of divergence of branch channels in braided rivers are critical controls upon passage of fish and recreational boats because they are points at which depths are at a minimum. Depths on randomly selected riffles were measured in braided reaches of the Ashley, Hurunui, and Rakaia Rivers and related to discharge; minimum depths encountered in extended reaches of these rivers at a range of flows have also been measured. The data can be used to predict minimum available passage depths at a specified flow, or conversely, to predict the discharge required to maintain a specified minimum passage depth. However, presently available estimates of critical minimum depths required for various instream uses (migration of salmonids, jetboating) appear excessively conservative, and minimum depth requirements must be more accurately determined before instream flow needs can be properly assessed.
点击下载:
PDF (1354KB)
返 回