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Riverine and Flood Modeling Software
Published in Saeid Eslamian, Faezeh Eslamian, Flood Handbook, 2022
Mustafa Goodarzi, Saeid Eslamian
The Mike Flood model is a dynamically coupled modeling system, consisting of a one-dimensional river model, Mike 11, and a two-dimensional river model, Mike 21, that is capable of hydrodynamic simulation of the combined flows in the river and floodplains. To model the flood events, a Mike 11 and a Mike 21 model must be created and introduced into the Mike Flood model. In Figure 16.5, the Mike Flood Editor window is shown. In this window, the various combinations of the model connection can be applied (DHI, 2017). This model simulates and solves the equations of energy, continuity, and momentum (Navier-Stokes equations) in one- and two-dimensional modes. In order to simulate the flood in the Mike Flood model, the topographic data of the study area are processed in the ArcGIS environment and converted into a suitable format for the river bed topography in the Mike Flood software. Then, by calibrating the model based on one or more flood events, the validated model can be used for simulating the flood events in the region (Ghasemi et al., 2018).
Rainfall-runoff modelling
Published in Amithirigala Widhanelage Jayawardena, Fluid Mechanics, Hydraulics, Hydrology and Water Resources for Civil Engineers, 2021
Amithirigala Widhanelage Jayawardena
MIKE SHE solves the partial differential equations governing overland and channel flow, unsaturated flow and saturated subsurface flow. In the complete model, processes such as snowmelt, interception and ET are also included. The flow equations are solved numerically using finite difference methods. In the horizontal plane, the catchment is discretized into a network of grid squares. The river system is assumed to run along the boundaries of these. Within each square, the soil profile is described at a number of nodes, which above the groundwater table may become partly saturated. Lateral subsurface flow is only considered in the saturated part of the profile. The commercially available MIKE-11 is a comprehensive, one-dimensional modelling system for the simulation of flows, sediment transport and water quality in estuaries, rivers, irrigation systems and other water bodies. Its two-dimensional counterpart MIKE-21 is a comprehensive modelling system for two-dimensional free surface flows applicable to studies of lakes, reservoirs, estuaries, bays, coastal areas and seas where stratification can be neglected.
Historical development of hydrological modelling
Published in A. W. Jayawardena, Environmental and Hydrological Systems Modelling, 2013
MIKE SHE solves the partial differential equations governing overland and channel flow, unsaturated and saturated subsurface flow. In the complete model, processes such as snow melt, interception, and evapo-transpiration are also included. The flow equations are solved numerically using finite difference methods. In the horizontal plane, the catchment is discretized into a network of grid squares. The river system is assumed to run along their boundaries. Within each square, the soil profile is described at a number of nodes, which above the groundwater table may become partly saturated. Lateral subsurface flow is only considered in the saturated part of the profile. The commercially available MIKE-11 is a comprehensive, 1D modelling system for the simulation of flows, sediment transport, and water quality in estuaries, rivers, irrigation systems, and other water bodies. Its 2D counterpart MIKE-21 is a comprehensive modelling system for 2D free surface flows applicable to studies of lakes, reservoirs, estuaries, bays, coastal areas, and seas where stratification can be neglected.
Assessing the role of location and scale of Nature Based Solutions for the enhancement of low flows
Published in International Journal of River Basin Management, 2022
Jessica Fennell, Chris Soulsby, Mark E. Wilkinson, Ronald Daalmans, Josie Geris
To address our objectives, we required a coupled hydrological/hydraulic model and selected MIKE SHE - MIKE 11 for our approach. MIKE SHE is a physically-based, deterministic, fully-distributed 3D catchment model which simulates the land-based phase of the hydrological cycle (Abbott et al., 1986). When dynamically-coupled with the MIKE 11 1D hydraulic model, this enables: detailed river network modelling with an integrated module for structures (e.g. RAFs); overland flow to - and out-of-bank flooding from – the river network; and river – baseflow reservoir exchange (Butts & Graham, 2005). Thus overflow from RAFs and their impact on different flow pathways (Fennell et al., 2020) could be simulated. MIKE SHE – MIKE 11 has been applied on scales ranging from <10 km2 to nationwide (Al-Khudhairy et al., 1999; Henriksen et al., 2003), for varied purposes, e.g. investigating stream temperatures (Fabris et al., 2018), water conservation structures (Ramteke et al., 2020), river and floodplain restoration (Clilverd et al., 2016) and climate change impacts (Thompson et al., 2017).
Modelling snowmelt runoff in Lidder River Basin using coupled model
Published in International Journal of River Basin Management, 2020
Yasir Altaf, Manzoor Ahangar, Mohammad Fahimuddin
In this study, the MIKE SHE model was combined with the stream directing model MIKE 11, a one-dimensional river model, to simulate the full hydrological cycle of the watershed, including ET, infiltration, unsaturated flow, saturated flow, overland flow, and streamflow. The main input parameters for the model setup include hydro meteorological data, land use data, streamflow data, leaf area indices, root depth, elevation map, digital elevation model, ET values obtained from FAO, soil hydraulic properties, horizontal and vertical hydraulic conductivities, specific yield, river morphology, river depth and cross sections, drainage depth, porosity etc. Unsaturated flow and ET were simulated using the two-layer water balance model designed for applications in the areas with a shallow groundwater table (DHI 2004). The model divides the unsaturated zone into a root-zone where ET occurs, and into a below-root-zone where ET does not occur.
Integrated 1D and 2D numerical model simulations for flushing of sediment from reservoirs
Published in ISH Journal of Hydraulic Engineering, 2019
H. P. Chaudhary, Neena Isaac, S. B. Tayade, V. V. Bhosekar
The long-term sediment deposition pattern and life of reservoir are estimated in the present study using one-dimensional numerical model MIKE 11. MIKE 11 is capable of simulating flow and water level, water quality and sediment transport in rivers, flood plains, reservoirs and other water bodies. The computational core of MIKE 11 is the hydrodynamic (HD) module. The HD module provides fully dynamic solution to the complete non-linear 1-D Saint Venant equations, diffusive wave approximation and kinematic wave approximation, Muskingum method and Muskingum–Cunge method for simplified channel routing. It can automatically adapt to subcritical flow and supercritical flow. It has ability to simulate standard hydraulic structures such as weirs, culverts, bridges, pumps, energy loss and sluice gates. ST/GST module is non-cohesive sediment module. It simulates transport, erosion and deposition of non-cohesive and graded non-cohesive sediments, including simulations of river morphology.