Hybrid statistical-machine learning approach for analyzing legacy and new phosphorus losses from subsurface drainage systems. [PDF]
J Environ QualAbstract Phosphorus (P) is essential for crop growth but leaches through subsurface drainage discharge, impacting water quality. This study's objectives are to (1) apply hybrid statistical‐machine learning to quantify the contributions of incidental (new) and legacy (old) P in drainage discharge from organic site and inorganic site and (2) evaluate the
Aniekwensi E, Ghane E.
europepmc +2 more sources
Multiyear changes in snowmelt phosphorus runoff with soil P drawdown or application of struvite to an organic forage crop. [PDF]
J Environ QualAbstract In this study, changes in P runoff losses from three field‐scale small watersheds in the Northern Great Plains region (Manitoba, Canada) under organic management were evaluated over a 7‐year period (2017–2023). A perennial forage crop was grown through this time period, either with biennial addition of a slow‐release fertilizer to maintain ...
Wilson H +6 more
europepmc +2 more sources
Evaluating the potential for snowmelt phosphorus losses from perennial forage crops. [PDF]
J Environ QualAbstract In cold regions, there is concern that losses of P with snowmelt runoff following freeze and thaw of vegetation may be greater from perennial forages relative to annual crops. We evaluate the drivers of P losses with snowmelt runoff over a network of field‐scale small watersheds in Manitoba, Canada, following annual crops (59 site‐years ...
Wilson H +4 more
europepmc +2 more sources
Head Discharge Relationship of Thin Plated Rectangular Lab Fabricated Sharp Crested Weirs
Journal of Applied Fluid Mechanics, 2016 Measuring open channel flows has been a major challenge at the field level. Because of the fact that the measuring devices are to be made from procedures and materials prescribed in standard codes.
S. A. Tekade, A. D. Vasudeo
doaj +1 more source
Flow pattern formed over steps at a low-head dam: Salmon River Dam
Water Science, 2023 Building Stepping way over the low-head dams has been proposed to reduce the risk of drowning in submerged flow conditions. In the Salmon Barrier, adding two steps downstream of weir was previously suggested as an effective method for reducing the risk ...
Gholamhossein Beygipoor +1 more
doaj +1 more source
The effect of crest shape on discharge coefficient at linear weirs
Građevinar, 2023 A detailed experimental laboratory analysis of the effect of crest shape on the discharge coefficient of sharp-crested weirs is presented in the paper. The experiments were conducted for four different crest shapes. The experiments and analyses show that
Yusuf Dogan, Nihat Kaya
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Hydraulic Performance of Sharp-Crested Labyrinth Weir
Academic Journal of Nawroz University, 2022 Weirs are used as a control structure in the waterways. Among the influencing geometrical parameters on the weir performance is the total crest length. Experimental work on 27 geometric models of two-cycle Labyrinth shape crest weir is tested. The tested physical models consist of three weir heights, three apex widths and the sidewall angle is between (
Rangeen Shihab Mohammed +1 more
openaire +2 more sources
Numerical modelling of flow over sharp-crested rectangular contracted weir [PDF]
, 2021 Weirs are flow control structures that can be used for flow diversion purposes. They are classified according to section geometry or their length in the flow direction.
Mosselman, Erik +3 more
core +1 more source
Numerical Investigation of Geometric Parameters Effect of the Labyrinth Weir on the Discharge Coefficient [PDF]
Journal of Rehabilitation in Civil Engineering, 2018 Weirs, as overflow structures, are extensively applied for the measurement of flow, its diversion, and control in the open canals. Labyrinth weir as a result of more effective length than conventional weirs allows passing more discharge in narrow canals.
Somayeh Emami +2 more
doaj +1 more source
Overflow Characteristic of Cylindrical Shape Crest Weirs over Horizontal Bed
Tikrit Journal of Engineering Sciences, 2011 The most common types of weirs are the broad-crested weir, the sharp-crested weir, the circular crested weir and the ogee crested weir. Advantages of the cylindrical weir shape include the stable overflow pattern, the ease to pass floating debris, the ...
Emad Abdul-Gabbar Al Babely +2 more
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