MIKE 21 Flow Model FM Hydrodynamic Module User Guide MIKE 2020 2 PLEASE NOTE COPYRIGHT This document refers to proprietary computer software which is pro- tected by copyright. All rights are reserved. Copying or other repro- duction of this manual or the related programs is prohibited without prior written consent of DHI A/S (hereinafter referred to as “DHI”). For details please refer to your 'DHI Software Licence Agreement'. LIMITED LIABILITY The liability of DHI is limited as specified in your DHI Software Licence Agreement: In no event shall DHI or its representatives (agents and suppliers) be liable for any damages whatsoever including, without limitation, special, indirect, incidental or consequential damages or damages for loss of business profits or savings, business interruption, loss of business information or other pecuniary loss arising in connection with the Agreement, e.g. out of Licensee's use of or the inability to use the Software, even if DHI has been advised of the possibility of such damages. This limitation shall apply to claims of personal injury to the extent permitted by law. Some jurisdictions do not allow the exclusion or limitation of liability for consequential, special, indirect, incidental damages and, accordingly, some portions of these limitations may not apply. Notwithstanding the above, DHI's total liability (whether in contract, tort, including negligence, or otherwise) under or in connection with the Agreement shall in aggregate during the term not exceed the lesser of EUR 10.000 or the fees paid by Licensee under the Agree- ment during the 12 months' period previous to the event giving rise to a claim. Licensee acknowledge that the liability limitations and exclusions set out in the Agreement reflect the allocation of risk negotiated and agreed by the parties and that DHI would not enter into the Agree- ment without these limitations and exclusions on its liability. These limitations and exclusions will apply notwithstanding any failure of essential purpose of any limited remedy. 3 4 Hydrodynamic Module FM - © DHI A/S CONTENTS 5 1 About This Guide . 11 1.1 Purpose . 11 1.2 Assumed User Background . 11 1.3 General Editor Layout . 11 1.3.1 Navigation tree . 11 1.3.2 Editor window . 11 1.3.3 Validation window . 12 1.4 Online Help . 12 2 Introduction . 13 2.1 Short Description . 13 2.2 Application Areas . 14 3 Getting Started . 15 4 Examples . 17 4.1 General . 17 4.2 Wind Set-up in a Rectangular Lake . 17 4.2.1 Purpose of the example . 17 4.2.2 Defining the problem . 18 4.2.3 Analytical solution . 18 4.2.4 Presenting and evaluating the results . 19 4.2.5 List of data and specification files . 20 4.3 Retention Basin by River . 20 4.3.1 Overall model description . 20 4.3.2 Sim1: Benefit of using a weir structure to simulate overflow . 22 4.3.3 Sim2: Combining weir and culvert to simulate a flooding scenario . 24 4.3.4 Sim3: Effect of specifying a QH boundary type for downstream flow . 25 4.3.5 Sim4: Simulating bank failure using dike structure . 27 4.3.6 Sim5: Simulating bank failure using depth correction . 30 4.3.7 Sim6: How to restrict inflow from river to basin using a gate . 33 4.3.8 Sim7: How to control outflow from basin to river using a gate . 34 4.3.9 Sim8: How to enable flow past a dry area using a culvert . 36 4.3.10 List of data and specification files . 38 4.4 Bed Resistance . 39 4.4.1 Purpose of the example . 39 4.4.2 Defining hydrodynamic model . 39 4.4.3 Presenting and evaluating the results . 41 4.4.4 List of data and specification files . 44 4.5 Infiltration . 44 4.5.1 Purpose of the example . 44 4.5.2 Defining hydrodynamic model . 45 4.5.3 Presenting and evaluating the results . 47 4.5.4 List of data and specification files . 49 4.6 Infrastructure . 50 4.6.1 Purpose of the example . 50 4.6.2 Defining hydrodynamic model . 50 4.6.3 Presenting and evaluating the results . 54 6 Hydrodynamic Module FM - © DHI A/S 4.6.4 List of data and specification files . 55 4.7 Flow Modelling in the Sound, Denmark . 56 4.7.1 Purpose of the example . 56 5 BASIC PARAMETERS . 57 5.1 Domain . 57 5.1.1 Mesh and bathymetry . 57 5.1.2 Domain specification . 59 5.1.3 Boundary names . 60 5.1.4 Material and infrastructure . 61 5.2 Time . 63 5.2.1 Remarks and hints . 63 5.3 Module Selection . 64 5.3.1 Inland flooding . 65 5.3.2 Mud, Debris or Oil . 65 6 HYDRODYNAMIC MODULE . 67 6.1 Solution Technique . 67 6.1.1 CFL number . 67 6.1.2 Remarks and hints . 68 6.2 Depth Correction . 68 6.2.1 General description . 69 6.3 Flood and Dry . 69 6.3.1 General description . 70 6.3.2 Recommended values . 71 6.3.3 Remarks and hints . 71 6.4 Density . 71 6.4.1 Recommendation . 72 6.4.2 Remarks and hints . 72 6.5 Fluid Properties . 72 6.5.1 General description . 72 6.5.2 Recommended values . 73 6.5.3 Remarks and hints . 75 6.6 Eddy Viscosity . 75 6.6.1 Horizontal eddy viscosity . 76 6.6.2 General description . 76 6.6.3 Recommended values . 77 6.6.4 Remarks and hints . 77 6.7 Bed Resistance . 77 6.7.1 General description . 79 6.7.2 Recommended values . 80 6.7.3 Remarks and hints . 80 6.8 Coriolis Forcing . 81 6.9 Wind Forcing . 81 6.9.1 Wind friction . 82 6.9.2 General description . 82 6.9.3 Remarks and hints . 83 7 6.10 Ice Coverage . 83 6.11 Tidal Potential . 85 6.11.1 Remarks and hints . 86 6.12 Precipitation-Evaporation . 86 6.13 Infiltration . 87 6.13.1 Infiltration specification . 87 6.13.2 General description . 89 6.14 Wave Radiation . 91 6.14.1 Recommendations . 91 6.14.2 Remarks and hints . 91 6.15 Sources . 92 6.15.1 Source specification . 92 6.16 Infrastructure . ..