Drag coeffcient and hydraulic roughness generated by an aquatic vegetation patch in a semi-arid alluvial channel

Filho, José Adalberto da Silva; Cantalice, José Ramon Barros; Guerra, Sergio Monthezuma Santoianni; Nunes, Elves Obede dos Santos; Santos, Júlio César Pinheiro; Corrêa, Marcus Metri; Barros, Genival; Silva, Valdemir de Paula

doi:10.1016/j.ecoleng.2019.105598

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…The effect of elevation roughness by the vegetation was reflected in reduced erosion rates, the instantaneous breakdown rate of soil and the soil losses. The protection degree of soil by T1 and T2 allowed soil losses within tolerable limits protecting the soil to prevent erosion than T3 similar relationships were obtained by Silva Filho et al (2019).…”

Section: Resultssupporting

confidence: 64%

“…The climate in the regions is classified as BWh according to the Köppen type hot and dry. The climate of the region, according to the Köppen classification, fits in the type Bwh, called semi-arid, hot and dry, with summer-autumn rains with an annual average of 647 mm year -1 and average annual temperature above 25ºC (Silva Filho et al, 2019). Precipitation data during the period of collection and monitoring of the experiment (Figure 1).…”

Section: Characterization Of Experimental áReamentioning

confidence: 99%

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Sediment Delivery Ratio from a small Semiarid Watershed of Brazil

Piscoya

Melo

Filho

et al. 2021

Rev. Bras. Geog. Fis.

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Assessing technologies based on sediment yield in watersheds is increasingly important to determine the delivery rate. This work aimed to determine values of sediment delivery of the hydrographic basin of the river Jacu in the semiarid of Pernambuco and its relations with the soil and vegetation. Therefore, it was calculated the rates of interrill and rill erosion by yield testing under shrub and uncovered Inceptisols conditions, and it was carried out direct measurement campaigns of suspended sediment and bedload, by means of US DH -48 e US BLH -84, respectively. The sediment yield obtained in Jacu stream was considered low. The soil loss due to interril erosion under uncovered conditions equal to 8.43 t ha -1 was considered high, as well as the same way for the values of rill erosion with erodibility equal to 0.0021142 kg N -1 s -1 and critical shear stress equal to 2.34 Pa. The mean value of sediment delivery ratio of Jacu watershed was equal to 0.165 and ranged from 0.29 in the year 2008 to 0.026 in 2010. This variation is associated with the natural variability of semiarid environment, indicating the necessity of assessment in a large period of years to improve the knowledge about the sediment delivery ratio of Jacu semiarid watershed.

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Section: Resultssupporting

confidence: 64%

Section: Characterization Of Experimental áReamentioning

confidence: 99%

Sediment Delivery Ratio from a small Semiarid Watershed of Brazil

Piscoya

Melo

Filho

et al. 2021

Rev. Bras. Geog. Fis.

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“…Meandering streams are one of the most ubiquitous patterns in fluvial morphology [1]. Previous research revealed that the uniqueness and applicative importance of these nearly regular loops in river planimetry have attracted the interest of several researchers in fluid mechanics and morpho-dynamics [2], geomorphology [3][4], river engineering [5], riparian ecology [6][7], and ecological engineering [8][9]. The stream processes itself is directed by fluid velocity and morphodynamical processes, which cause lateral bank erosion and the constant migration of meanders, as well as by intermittent cutoffs that prevent self-intersections of the stream and create sudden reductions in stream length and sinuosity [8].…”

Section: Introductionmentioning

confidence: 99%

Examining meandering stream by using geomorphological characteristics with GIS-based analysis

Tallar,

Pattipawaej,

Desiani

et al. 2023

E3S Web Conf.

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An assessment of the meandering stream type using its classification system to geomorphology characteristics combined with GIS-based analysis is presented in this paper. It describes geomorphology characteristics consisting of 8 parameters with GIS-based analysis that differ in the zone of sediment position, stream width, stream sinuosity, amplitude, wavelength, bend sharpness, meander pattern, and slope. The selected case study in this paper is the Barito Stream, South Kalimantan, Indonesia. Based on the results, the variability varied in all the geomorphology characteristics except bend sharpness and slope. The transport zone is the longest zone with classified as a very wide river with moderate sinuosity and high amplitude (< 1500). It is also categorized as a moderate wavelength and sharp bend with a relatively shallow slope. This approach is a simple, appropriate, and easy-to-use practice in examining meandering stream since there is no data or lack of supporting field data. The implementation of this meandering stream classification method is suitable for stream restoration projects, fish habitat enhancement, and water resource management. Further research is the study of possible geomorphic responses of a channel to natural and anthropogenic disturbances including channel-bed degradation, channel-bed aggradation, channel widening, and channel straightening.

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