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Water Flow Modeling Articles & Analysis
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Choosing and placing valves carefully is important for fire sprinkler systems to meet code requirements. The Inspector’s Test Valves and Test and Drain Valves are frequently confused. This is because they perform similar functions but have distinct characteristics and applications. Understanding the differences between these valves is crucial to ensure their proper ...
In stormwater design, frequency curves are used to determine return periods for the design of stormwater infrastructure. For instance, a stormwater pipe may have a design return period for a 1 in 20-year rainfall event. With a frequency curve, engineers can do risk analysis, comparing the annual savings from mitigated floods (benefits) against various levels of flood mitigation infrastructure ...
Client: Lake Simcoe Region Conservation Authority: Mr. David Lembcke, Manager, Environmental Science and Monitoring, 120 Bayview Pkwy, Box 282, Newmarket, ON L3Y 4X1 (905.895.1281) Key Personnel: Spencer Malott, E.J. Wexler The Lake Simcoe Region Conservation Authority (LSRCA) has adopted the Environmental Flow (E-Flow) approach to meet the requirements of the 2009 Lake Simcoe ...
Drainwells are small diameter wells that can collect water laterally from the various more permeable layers in the overburden and then gravity drain it to a lower layer – often the coal seam being mined – where it can be removed by pumping wells or sumps located in the bottom of the pit. A ground-water flow model ...
Currently, ground freezing is used to isolate the ore from ground-water sources. Localized depressurising of the freezing drifts is being considered to increase their ground-stability. Cross-hole flow and shut-in tests in eight NQ-size coreholes were conducted in the basement rock that is adjacent to a fault contact with the overlying 500 m thick sandstone unit. ...
Abstract: Pre-mining depressurising of a deep ore body at the McArthur River mine in northern Saskatchewan was considered to decrease the risk associated with mining near 5 MPa water pressure and increasing the amount of ore that can be extracted. Based on a limited amount of field data, a three-dimensional finite element ground-water flow ...
The presence of dissolved oxygen (DO) in water flows is an important factor to ensure the aerobic conditions recognised as beneficial to preventing the occurrence of detrimental effects. ...
Most often, HEC-RAC – a one dimensional, open-channel flow, hydraulic computer model – is issued to determine water surface elevations and is the industry standard for floodplain delineation projects. ...
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Three public authorities in Sri Lanka are responsible for various tasks in water management and they all depend on hydro-meteorological data. However, the existing monitoring network was in poor condition and reliable, up-to-date measurement values were often missing. ...
An integrated management system was developed for the efficient operation of a storm water treatment unit to assist in the management of urban river water quality and flow. The SWMM hydrological model was calibrated and then used to predict the hydrograph and concentration graphs of surface runoff from a storm events based on ...
In this paper, a two-dimension coupling model is presented to simulate water flow, sediment transport and bed evolution based on the shallow water assumption, depth-averaged integration as well as morphological evolution. A new term accounting for the sediment effect on the momentum conservation of water–sediment ...
A Decision Support System (DSS) was set up based on WEAP, a software that represents the interaction between water resources and users by simulating flow mechanisms directly or coupled to external models. MODFLOW-2000, one of such models, was used to represent groundwater flow in the carbonatic and in the ...
In hydrological models, variably saturated flow is often described using the Richards equation, either in a fully three-dimensional (3D) implementation or using a quasi-3D framework based on the 1D Richards equation for vertical flow and a flow-approximation for the other two dimensions. However, it is unclear in which configuration or under which boundary conditions these approximations can ...
This enabled a UK water company to propose an ‘operational flow conditioning’ maintenance plan that reduces discolouration risk, improves network resilience and asset condition and yet does not require the trunk main to be decommissioned for invasive cleaning. ...
Rapid socio-economic development in suburban areas of developing countries has induced changes in agricultural waste and nutrient management, resulting in water pollution. The study aimed at estimating agricultural nutrient cycles and their contribution to the water environment. A material flow model of nitrogen (N) and ...
Rapid socio-economic development in suburban areas of developing countries has induced changes in agricultural waste and nutrient management, resulting in water pollution. The study aimed at estimating agricultural nutrient cycles and their contribution to the water environment. A material flow model of nitrogen (N) and ...
The use of groundwater for rice paddy irrigation was considered as well as a water supply from outside of the watershed (Kasumigaura Lake). The model parameters were calibrated and validated with reference to the predictability of river water flow and the groundwater level. Using the calibrated model, ...
The inverse simulation function of the HYDRUS software was used to calibrate the water flow model. The observed effect of water flowing faster along the column wall was included in the inverse simulations. The biokinetic model was calibrated by fitting heterotrophic biomass growth to measurements ...
The property presented a series of unique challenges including multiple LNAPL plumes, LNAPL identified within karst bedrock, bedrock fractures impacted with LNAPL with identified impacts over 180-ft below grade, and impacts to private drinking water supplies. Solution: Site assessment activities included hollow-stem auger drilling, air-rotary drilling, down hole video ...
A modelling study on a multi-layered confined/unconfined alluvial aquifer system was performed to quantify surface water/groundwater interactions. The calibrated groundwater flow model was used to forecast climate change impacts by implementing the results of a downscaled A1B model ensemble for the Po river ...