scholarly journals Timber sheet pile-vegetation model for stream bank retaining structure

2019 ◽  
Vol 92 ◽  
pp. 12013 ◽  
Author(s):  
Abhijith Kamath ◽  
Wolfgang Gard ◽  
Jan-Willem Van de Kuilen
Keyword(s):  
Riparian Vegetation ◽  
Root Systems ◽  
Physical Parameters ◽  
Preliminary Estimate ◽  
Sheet Pile ◽  
Vegetation Model ◽  
Mechanical Reinforcement ◽  
Retaining Structures ◽  
Retaining Structure ◽  
Stream Bank

Timber sheet piles are widely used to protect canal and stream banks. Quite often, riparian vegetation also grows along these retaining structures. Roots of riparian vegetation mechanically reinforce the soil with their root systems. A timber sheetpile- vegetation model is developed taking into account the mechanical reinforcement of the vegetation roots. The model uses easy to obtain physical parameters, which makes it suitable to have a preliminary estimate of how the forces on the bio engineered structure would evolve.

scholarly journals Different Hatching Rates of Floodwater Mosquitoes Aedes sticticus, Aedes rossicus and Aedes cinereus from Different Flooded Environments

Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 279
Author(s):  
Anders Lindström ◽  
Disa Eklöf ◽  
Tobias Lilja
Keyword(s):  
Tap Water ◽  
Soil Samples ◽  
Mosquito Larvae ◽  
Retaining Structures ◽  
Retaining Structure ◽  
Large Numbers ◽  
Random Samples ◽  
Nuisance Species ◽  
Flooding Events ◽  
Hatching Rates

In the lower Dalälven region, floodwater mosquitoes cause recurring problems. The main nuisance species is Aedes (Ochlerotatus) sticticus, but large numbers of Aedes (Aedes) rossicus and Aedes (Aedes) cinereus also hatch during flooding events. To increase understanding of which environments in the area give rise to mosquito nuisance, soil samples were taken from 20 locations from four environmental categories: grazed meadows, mowed meadows, unkept open grassland areas and forest areas. In each location 20 soil samples were taken, 10 from random locations and 10 from moisture retaining structures, such as tussocks, shrubs, piles of leaves, logs, and roots. The soil samples were soaked with tap water in the lab, and mosquito larvae were collected and allowed to develop to adult mosquitoes for species identification. Fewer larvae hatched from mowed areas and more larvae hatched from moisture retaining structure samples than random samples. The results showed that Aedes cinereus mostly hatch from grazed and unkept areas and hatched as much from random samples as from structures, whereas Aedes sticticus and Aedes rossicus hatched from open unkept and forest areas and hatch significantly more from structure samples. When the moisture retaining structures in open unkept areas where Aedes sticticus hatched were identified it was clear that they hatched predominantly from willow shrubs that offered shade. The results suggest that Ae. sticticus and Ae. cinereus favor different flooded environments for oviposition.

RIPARIAN VEGETATION CLASSIFICATION USING THE DYNAMIC RIPARIAN VEGETATION MODEL

2019 ◽  
Author(s):  
TAKASHI ASAEDA ◽  
BHAGYA NALLAPERUMA ◽  
MAHENDRA B BANIYA ◽  
SENAVIRATHNA MDH JAYASHANKA
Keyword(s):  
Riparian Vegetation ◽  
Vegetation Classification ◽  
Vegetation Model

Riparian vegetation model to predict seedling recruitment and restoration alternatives

2020 ◽  
Vol 276 ◽  
pp. 111339
Author(s):  
Rohan Benjankar ◽  
Andrew W. Tranmer ◽  
Dmitri Vidergar ◽  
Daniele Tonina
Keyword(s):  
Riparian Vegetation ◽  
Seedling Recruitment ◽  
Vegetation Model

Riparian Vegetation Effects on Freeze-Thaw Cycling and Desiccation of Stream Bank Soils

2003 ◽  
Author(s):  
Theresa Wynn ◽  
Saied Mostaghimi ◽  
H.E. and Elizabeth F. Alphin
Keyword(s):  
Riparian Vegetation ◽  
Vegetation Effects ◽  
Freeze Thaw ◽  
Stream Bank

scholarly journals Implementing a dynamic riparian vegetation model in three European river systems

Ecohydrology ◽  
2012 ◽  
Vol 6 (4) ◽  
pp. 635-651 ◽  
Author(s):  
A. García-Arias ◽  
F. Francés ◽  
T. Ferreira ◽  
G. Egger ◽  
F. Martínez-Capel ◽  
...  
Keyword(s):  
Riparian Vegetation ◽  
Vegetation Model ◽  
River Systems

scholarly journals Study on Deformation and Stability of Rock-Like Materials Retaining Structure during Collaborative Construction of Super-Adjacent Underground Project

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Hongfu Qu ◽  
Lihua Wang ◽  
Chunlei Feng ◽  
Hualao Wang ◽  
Xuan Zhang
Keyword(s):  
Limit Equilibrium ◽  
Adjacent Area ◽  
Underground Engineering ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Retaining Structures ◽  
Retaining Structure ◽  
Collaborative Construction ◽  
Measured Deformation ◽  
The Difference

The collaborative construction of undercrossing tunneling of Gongchang Road and the adjacent Metro Line 6 extension station section in Shenzhen is difficult and of high risk. In view of these characteristics, this paper studied the deformation and stability of rock-like material retaining structures in the process of underground engineering collaboration by combining the measured deformation data and the circular slide theory based on the limit equilibrium method. The results show that due to the difference between the supporting systems of rock-like materials on both sides and other reasons, the upper part of the retaining structure and the limited soil in the adjacent area tilt greatly to one side at the same time, and the surface settlement in the limited soil area also increases with the increase of the excavation depth of the foundation pit. On the basis of measured deformation data analysis, the mechanical model for calculating the stability concerning the relationship between the adjacent distance L of the deep foundation pit and the vertical distance D ′ between the lowest support of the foundation pit and the bottom of retaining structures was established. Then, the calculation formula for the against basal heave stability covering different adjacent degrees was established. Besides, the applicability of the calculation method was verified by combining it with the actual engineering and related prediction theories, which further proves that the research results have certain theoretical value and engineering significance, and can provide a reference for the rock-like material retaining structures design and stability analysis of similar projects.

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