Hydrodynamics of heterogeneous vegetation patches

2020 ◽  
pp. 1523-1526
Author(s):  
V. Chembolu ◽  
S. Dutta
Keyword(s):  
Vegetation Patches ◽  
Heterogeneous Vegetation

scholarly journals The response of Orthoptera to grazing on flood defense embankments in Europe

2018 ◽  
Vol 27 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Kimberley Fargeaud ◽  
Tim Gardiner
Keyword(s):  
Late Summer ◽  
Food Resources ◽  
Moderate Intensity ◽  
Sheep Grazing ◽  
Flood Defense ◽  
The Impact ◽  
Vegetation Patches ◽  
Oviposition Sites ◽  
Heterogeneous Vegetation

European flood defense embankments form an excellent habitat for Orthoptera. To be effective against storms, these vegetated earth embankments have to be managed by grazing or mowing. However, grazing can impact invertebrates such as grasshoppers and crickets (Orthoptera). This management can lead to dispersal toward undisturbed grassland and reductions in the quality of habitat, food resources and oviposition sites. In most cases, orthopteran insects require heterogeneous vegetation patches with swards of varying height. The impact of grazing depends on the type of livestock; it is very important to choose appropriate animals, timing and intensity. Sheep grazing in late summer (September-October) at a moderate intensity seems to be favorable for Orthoptera. If grazing is carefully monitored, it can promote Orthoptera conservation while maintaining flood defense integrity.

scholarly journals Sediment transport and roughness coefficients generated by flexible vegetation patches in the emergent and submerged conditions in a semiarid alluvial open-channel

2021 ◽  
Vol 125 ◽  
pp. 107472
Author(s):  
Douglas Monteiro Cavalcante ◽  
Maria Tatiane Leonardo Chaves ◽  
Gabriella Moreira Campos ◽  
José Ramon Barros Cantalice ◽  
Genival Barros Junior
Keyword(s):  
Sediment Transport ◽  
Open Channel ◽  
Flexible Vegetation ◽  
Vegetation Patches ◽  
Submerged Conditions

scholarly journals Functional strategies and distribution of climbing plant communities in different vegetation patches in a subtropical dry forest, central Argentina

2017 ◽  
Vol 12 (1) ◽  
pp. 23-33 ◽  
Author(s):  
María Cecilia Ferrero ◽  
Sebastián R Zeballos ◽  
Juan I Whitworth-Hulse ◽  
Melisa A Giorgis ◽  
Diego E Gurvich
Keyword(s):  
Plant Communities ◽  
Dry Forest ◽  
Central Argentina ◽  
Climbing Plant ◽  
Vegetation Patches

scholarly journals Riparian Vegetation Density Mapping of an Extremely Densely Vegetated Confined Floodplain

Hydrology ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 176
Author(s):  
István Fehérváry ◽  
Tímea Kiss
Keyword(s):  
Riparian Vegetation ◽  
Woody Species ◽  
Submerged Vegetation ◽  
Vegetation Types ◽  
Vegetation Density ◽  
Vegetation Zone ◽  
Density Mapping ◽  
Vegetation Zones ◽  
Branch Density ◽  
Vegetation Patches

The most crucial function of lowland-confined floodplains with low slopes is to support flood conveyance and fasten floods; however, obstacles can hinder it. The management of riparian vegetation is often neglected, though woody species increase the vegetation roughness of floodplains and increase flood levels. The aims are (1) to determine the branch density of various riparian vegetation types in the flood conveyance zone up to the level of artificial levees (up to 5 m), and (2) to assess the spatial distribution of densely vegetated patches. Applying a decision tree and machine learning, six vegetation types were identified with an accuracy of 83%. The vegetation density was determined within each type by applying the normalized relative point density (NRD) method. Besides, vegetation density was calculated in each submerged vegetation zone (1–2 m, 2–3 m, etc.). Thus, the obstacles for floods with various frequencies were mapped. In the study area, young poplar plantations offer the most favorable flood conveyance conditions, whereas invasive Amorpha thickets and the dense stands of native willow forests provide the worst conditions for flood conveyance. Dense and very dense vegetation patches are common in all submerged vegetation zones; thus, vegetation could heavily influence floods.

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