Numerical River Modelling
River Rhine "Mehrum" Section Case Study

Preparation of the GIS project

• create a new project folder and a new ArcGIS map
• change the default properties of the data frame -> Layers -> Properties
  -> Coordinate reference system:ETRS 1989 UTM Zone 32N

Part 1: Import of the River Rhine cross section point data

Step-by-Step

1. add Rhein_punkte.txt to GIS Map
   using import tool: 3D Analyst Tools -> Conversion -> From File -> ASCII 3D to Feature Class
   use as parameter :
       Input File Format -> GENERATE
       Output Feature Class Type -> POINT
       Coordinate System -> DHDN_3_Degree_Gauss_Zone_2
       (Gauss-Krüger Potsdam Datum Zone 2) EPSG 31466
   predefined CRS in ArcGIS: Projected Coordinate Systems -> National Grids -> Germany
2. adapt data CRS to map CRS
   using tool:Data Management Tools -> Projections and Transformations -> Project
       new CRS: ETRS_1989_UTM_Zone_32N EPSG 25832
       using Transformation DHDN_To_ETRS_1989_4
   
3. add z coordinate (elevation) to attributes
   using tool:Data Management Tools -> Add Geometry Attributes
   or/and     3D Analyst Tools -> 3D Features -> Add Z Information
4. adapt visualization using new field (elevation)
   select Properties for the shape file -> Symbology
   change the standard symbols to other modes
   (e.g. Quantities -> Graduated colors -> use Z )

Part 2: Import of the Polder Mehrum DEM

Step-by-Step

1. add dgmfull.e00 to GIS Map
   using import tool: Conersion Tools -> To Coverage -> Import from E00
   
2. adapt data CRS to map CRS
   using tool: Data Management Tools -> Projections and Transformations -> Raster -> Project Raster
       new CRS: ETRS_1989_UTM_Zone_32N EPSG 25832
       using Transformation DHDN_To_ETRS_1989_4
   
3. add PolderMehrumMesh.dat to GIS Map
   rename PolderMehrumMesh.dat to PolderMehrumMesh.txt
   using import tool: 3D Analyst Tools -> Conversion -> From File -> ASCII 3D to Feature Class
       Input File Format -> GENERATE
       Output Feature Class Type -> POINT
       Coordinate System -> DHDN_3_Degree_Gauss_Zone_2
       (Gauss-Krüger Potsdam Datum Zone 2), EPSG 31466
   predefined CRS in ArcGIS: Projected Coordinate Systems -> National Grids -> Germany
4. adapt data CRS to map CRS
   using project tool: Data Management Tools -> Projections and Transformations -> Project
       new CRS: ETRS_1989_UTM_Zone_32N EPSG 25832
       using Transformation DHDN_To_ETRS_1989_4
   
5. add z coordinate (elevation) to attributes
   using tool: Data Management Tools -> Add Geometry Attributes
   or/and      3D Analyst Tools -> 3D Features -> Add Z Information
6. adapt visualization using elevation
   select Properties Symbology
   choose same visualization rules/limits as for the other elevation data

Part 3: Additional GIS data and services

WMS-Services

1. navigation map (recommended)
   WMS Server: https://via.bund.de/wsv/ienc/wms?
   Service Name: InlandENCs der WSV
2. topographical map
   WMS Server: https://www.wms.nrw.de/geobasis/wms_nw_dtk100
   Service Name: WMS NW DTK100 WMS Server: https://www.wms.nrw.de/geobasis/wms_nw_dtk10
   Service Name: WMS NW DTK10

How to add WMS services to your map ?
example: https://via.bund.de/wsv/ienc/wms?
click on the thumbnails to get full images:

use the Add Data Icon, select GIS Servers and Add WMS service:

specify the URL of the WMS service, click on Get Layers, select the service you need

select the new insert WMS service in the list of WMS servies:

select the map you need (here IENC Karten (maps)):

the sevice is using WGS84, transformation should be done automatically:

Shape files / raster data

1. Gewässerstationierungskarte NRW: water body chainage / positioning map)- (recommended)
   Link: https://www.opengeodata.nrw.de/produkte/umwelt_klima/wasser/oberflaechengewaesser/gsk3c/
   gsk3c_stationierung.shp -> chainage points
   gsk3c_gew_kanal_plm.shp -> river polyline
   gsk3c_gew_flaeche.shp -> river polygon (main river bed)
2. Überschwemmungsgebiete in NRW als Shape
   Link: https://www.opengeodata.nrw.de/produkte/umwelt_klima/wasser/hochwasser/uesg/
   festgesetzte_Ueberschwemmungsgebiete.shp -> river polygon (main river bed plus flood plains)
3. Digital Topograhical Maps
   Link: https://www.opengeodata.nrw.de/produkte/geobasis/tk/
4. SRTM Germany
   Link: http://www.opendem.info/download_srtm.html
5. Openstreetmap Nordrhein-Westfalen
   Link: 0http://download.geofabrik.de/europe/germany/nordrhein-westfalen.html