Use of slope creation for rehabilitating incised, regulated, gravel bed rivers

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منابع مشابه

Use of slope creation for rehabilitating incised , 3 regulated , gravel bed rivers 4

6 [1] Gravel-bedded channels often become incised and degraded below dams. Gravel can 7 be added to the channel to rehabilitate hydrogeomorphic conditions, including those 8 promoting salmon spawning. When implemented without increasing bed slope, gravel 9 addition at downstream riffles back floods upstream riffles. A 2-year gravel augmentation 10 project was done to test the efficacy of a new ...

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Equivalent roughness of gravel-bed rivers

The relation between the equivalent roughness and different grain size percentiles of the sediment in gravel-bed rivers was determined under the hypothesis that the vertical distribution of the flow velocity follows a logarithmic law. A set of 954 data points was selected from rivers with gravel size sediment or larger, with a non-sinuous alignment and free of vegetation or obstacles. According...

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A procedure for classifying textural facies in gravel-bed rivers

Textural patches (i.e., grain-size facies) are commonly observed in gravel-bed channels and are of significance for both physical and biological processes at subreach scales. We present a general framework for classifying textural patches that allows modification for particular study goals, while maintaining a basic degree of standardization. Textures are classified using a two-tier system of t...

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Bankfull Discharge Recurrence Interval in Gravel-bed Rivers

Bankfull discharge was identified in some 30 gravel-bed rivers representing in total c. 40 gauging stations. The catchment sizes vary from 4km2 to nearly 2700km2. Bankfull discharge value increases with basin size. In the case of gravel-bed rivers developed on an impermeable substratum, the following equation emerges: Qb=0·087 A 1·044. Bankfull discharge recurrence interval was determined by fi...

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Variation in the reference Shields stress for bed load transport in gravel-bed streams and rivers

[1] The present study examines variations in the reference shear stress for bed load transport (tr) using coupled measurements of flow and bed load transport in 45 gravel-bed streams and rivers. The study streams encompass a wide range in bank-full discharge (1–2600 m/s), average channel gradient (0.0003–0.05), and median surface grain size (0.027–0.21 m). A bed load transport relation was form...

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ژورنال

عنوان ژورنال: Water Resources Research

سال: 2007

ISSN: 0043-1397

DOI: 10.1029/2006wr005159