Associations between substrate and hydraulic variables and the distributions of a sculptured and an unsculptured unionid mussel

2019 ◽  
Vol 38 (3) ◽  
pp. 543-553
Author(s):  
Daniel D. Goodding ◽  
Marsha G. Williams ◽  
David F. Ford ◽  
Lance R. Williams ◽  
Neil B. Ford
Keyword(s):  
Hydraulic Variables

Auxiliary Hydraulic Variables

2017 ◽  
pp. 309-342
Author(s):  
Jochen Aberle ◽  
Colin D. Rennie ◽  
David M. Admiraal ◽  
Marian Muste
Keyword(s):  
Hydraulic Variables

Sensitivity of Modeled Channel Hydraulic Variables to Invasive and Native Riparian Vegetation

2017 ◽  
Vol 8 (4) ◽  
pp. 47-61 ◽  
Author(s):  
Adriana E. Martinez
Keyword(s):  
Invasive Species ◽  
Riparian Vegetation ◽  
Native Species ◽  
Plant Density ◽  
Dominant Role ◽  
Individual Species ◽  
Stream Velocity ◽  
Plant Characteristics ◽  
Vegetation Patches ◽  
Hydraulic Variables

Quantifying the roughness of riparian vegetation is important where it plays a dominant role by reducing water velocity. Vegetation roughness was calculated based on the plant characteristics of three dominant herbaceous plants, including one invasive, along the Sprague River, Oregon. E. palustris and invasive P. arundinacea exhibit higher and similar roughness values whereas C. vesicaria is lower. To determine differences, hydraulic channel conditions were modeled within NAYS 2DH. First, current conditions were modeled by populating the channel banks with roughness, plant density, and height of vegetation patches. Next, along the same reach, monocultures were modeled assuming dominance of individual species. In comparing the two native species to the invasive species, monoculture conditions show that plant density and roughness causes the native E. palustris to have the highest ability to decrease stream velocity. In areas where the invasive species is outcompeting E. palustris, such changes could cause increases in velocity and less stable bank surfaces.

scholarly journals Impact of network sectorisation on water quality management

2017 ◽  
Vol 20 (2) ◽  
pp. 424-439 ◽  
Author(s):  
Hooman Armand ◽  
Ivan Stoianov ◽  
Nigel Graham
Keyword(s):  
Water Quality ◽  
Large Scale ◽  
Water Quality Management ◽  
Cost Effective ◽  
Pressure Control ◽  
Supply Networks ◽  
Potential Impact ◽  
And Control ◽  
The Impact ◽  
Hydraulic Variables

Abstract The sectorisation of water supply networks (WSNs) includes the permanent closure of valves in order to achieve a cost-effective leakage management and simplify pressure control. The impact of networks sectorisation, also known as district metered areas (DMAs), on water quality and discolouration has not been extensively studied and it remains unknown. In addition, hydraulic variables used in the literature for assessing the likelihood of potential discolouration are limited and inconclusive. This paper investigates a methodology to evaluate the impact of networks sectorisation (DMAs) on water quality and the likelihood of discolouration incidents. The methodology utilises a set of surrogate hydraulic variables and an analysis of the hydraulic condition in pipes with historic discolouration complaints. The proposed methodology has been applied to a large-scale WSN, with and without sectors, in order to assess the potential impact of DMAs on water quality. The results demonstrate that the sectorisation of WSN (DMAs) could compromise the overall water quality and increase the likelihood of discolouration incidents. The results of this study and the proposed surrogate hydraulic variables facilitate the formulation of optimisation problems for the re-design and control of WSNs with sectorised topologies.

Testing for reach-scale adjustments of hydraulic variables to soluble and insoluble strata: Buckeye Creek and Greenbrier River, West Virginia

Geomorphology ◽  
2003 ◽  
Vol 56 (1-2) ◽  
pp. 201-217 ◽  
Author(s):  
Gregory S Springer ◽  
Ellen E Wohl ◽  
Julie A Foster ◽  
Douglas G Boyer
Keyword(s):  
West Virginia ◽  
Hydraulic Variables
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