Field study for determine Manning´s roughness coefficient with different flow conditions

Schügerl, Radoslav

doi:10.31577/ahs-2019-0020.02.0017

Cited by 1 publication

(5 citation statements)

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“…For modelling the influence of canal sediment deposits on the groundwater regime in the study area, the TRIWACO 4.0 model (Royal Haskoning, 2004;Velstra et al, 2014) was chosen.…”

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

“…The GW flow simulation in TRIWACO is solved by partial differential equations, which follow from Darcy's law and the equation of continuity, and the Finite Element formulation of these equations. Based on the Dupuit-Forchheimer assumption, the equation for steady-state groundwater flow can be written as (Royal Haskoning, 2004):…”

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

“…In TRIWACO q is divided into four distinctive components, depending on the origin of the water (Royal Haskoning, 2004): qa -recharge from the top aquifer due to precipitation, infiltration etc. ; ql -leakage between the aquifers; qr -recharge/discharge from rivers, canals and drains; qs -recharge/discharge from sources or point sinks.…”

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

“…the recharge/discharge from the canals to the aquifer. The inflow or drainage rate at each canal node is calculated as follows (Royal Haskoning, 2004):…”

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

“…The river (canal) resistance in natural conditions usually has different values for infiltration (hr > h) and for drainage (hr < h). Model TRIWACO offers the possibility to define a different resistance for drainage and for infiltration (Royal Haskoning, 2004). Brunner et al (2009) described spatial and temporal aspects of the flow transition from connection to disconnection between SW and GW.…”

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

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Impacts of riverbed aggradation on groundwater regime in a lowland area

Bara,

Dulovičová,

Velísková

et al. 2024

Journal of Hydrology and Hydromechanics

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In this study, the influence of riverbed silting on the groundwater regime in a lowland area was investigated. The study area is situated at the Rye Island (Žitný Ostrov) in Slovakia, along the Gabčíkovo – Topoľníky canal, which is part of the drainage-irrigation canal system constructed in this locality. The Rye Island is an area with very low slope (0.25 10–4) and good climatic conditions for aquatic vegetation, therefore the canals are influenced by intensive silting processes. The spatial and temporal patterns of surface water – groundwater exchange are significantly influenced by the thickness of riverbed sediments and their permeability. The aim of this study was to evaluate the thickness and hydraulic conductivity of bed sediments in the Gabčíkovo – Topoľníky canal and to examine their influence on the groundwater – surface water interaction in the area. The hydraulic conductivity of the sediments was assessed from undisturbed samples by the falling head method. The obtained data were used for numerical simulations of groundwater heads by the TRIWACO model for different drainage and infiltration resistance conditions in the area of interest. The results of this study can support the planning of canal maintenance.

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“…For modelling the influence of canal sediment deposits on the groundwater regime in the study area, the TRIWACO 4.0 model (Royal Haskoning, 2004;Velstra et al, 2014) was chosen.…”

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

“…the recharge/discharge from the canals to the aquifer. The inflow or drainage rate at each canal node is calculated as follows (Royal Haskoning, 2004):…”

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

Section: Modelling Of Sw-gw Interaction With the Triwaco Model Brief ...mentioning

confidence: 99%

See 3 more Smart Citations