In Baden-Württemberg, there are HWGKs for around 11,300 river kilometres throughout the country. The HWGK meet the requirements of the EG-HWRM-RL as well as the very high requirements of §65 of the Water Act BW. They have direct legal effect, which is why the quality requirements are high. In the course of updating the HWGK, extensive data will be made available for processing in all sub-projects, or will be returned as result data. This data transfer is to be guaranteed by the DL1. The incoming data must be subjected to a quality check in a formal check (submission in a uniform, specified data format) as well as in a technical check (plausibility check). Existing data must be checked for its usability. Furthermore, the project management (RPS), the LUBW and the commissioned service providers are involved in questions regarding data (formats, attitude; etc.) and also on the conceptual development of the project.

LOT-0001
Update HWGK - Framework Agreement DL1 Data: Quality Assurance and Expert Advice.
As part of the implementation of the EU Flood Risk Management Directive, Baden-Württemberg had drawn up flood hazard maps (HWGK) on approx. 12,300 river kilometres by 2015 (see www.hochwasserbw.de). Approx. 50 TB of data were created for this purpose, which are stored and visualized at the State Institute for the Environment (LUBW). These are raster data (water levels, flood depths) and vector data. All information is stored in regionally distributed geodatabases (ESRI-GDB). The map and data sets must be updated regularly and adapted to new findings (e.g. terrain modifications, changes in and around the water). Two concepts have been introduced for this purpose: In the "area-by-area update", entire river catchment areas are recreated. Local adjustments are made on an ad hoc basis by a project developer as part of a measure implementation. Only a local area of the HWGK will be replaced. Requirements and methodological description for the preparation / updating of the HWGK are described in the Hydraulics service description and presented in corresponding process diagrams # The RPS is the project manager and coordinates the state-wide work. The technical project management HWGK is made up of the project management (RPS) and service providers (DL) from the areas of data, hydraulics, hydrology, surveying, tendering procedures. You will advise the project management. This also includes committee work and technical advice to the four regional councils, the 44 lower water authorities and the engineering offices commissioned with the hydraulic and hydrological calculations. In addition, the service providers accompany, support and advise in tendering procedures. # The main task is the quality assurance of the submitted result data of the hydraulic and hydrological calculations in the respective specialist areas according to defined technical criteria. These are to be further developed in coordination with the project management and appropriate documentation of the tests is to be prepared. # The other tasks of the DL-Daten are: Further development and maintenance of data management HWGK: The DL-Daten implements the requirements from the service description of the HWGK update into the project templates and the specified templates for the submission of result data and keeps these templates up-to-date. The quality-assured results of the contractors are to be processed, homogenised with the results already available and adopted or exchanged in the existing state-wide HWGK results data set. The updated result data must be handed over to LUBW. At the beginning of a hydraulic order, the DL data compiles the basic data generated in the project, supplements it with the technical data of the HWGK initial preparation and makes it available to the contractor. The DL-Daten is the contact person for the project management for all inquiries about technical data HWGK. # Data preparation and data verification: All input and basic data must be quality assured: In the project, terrestrial surveying and aerial data are collected, which are to be checked by the DL data and prepared for further processing (e.g. HydTERRAIN). It is usually the state-wide GPRO format for water profile surveys as well as high-resolution airborn laser scanning data (red or green laser). In addition, data (dwg, dxf, shp) are regularly provided to the project, which have to be prepared and processed for further processing. The DL data takes the original high-resolution airborn laser scanning data, filters it and creates a RohTERRAIN. This forms the basis for the derivation of further elevation models (depending on the task, e.g. 4x4m surface for the derivation of catchment areas or 0.5x0.5m for the HydTERRAIN). # The DL-Daten supports the tasks of the other service providers (e.g. in the survey of the survey requirements for water profiles) and provides specifically prepared data sets. It creates and maintains the exact course of the water (HWGK Centerline) within the processing scenery. The basis for this recording is the airborn laser scanning data, orthoimages and survey data of the waters. # Creation of HydTERRAIN: As part of the area-by-area update, a hydraulically plausible elevation model (HydTERRAIN) is to be created for the hydraulic calculation of the HWGK in ESRI terrain format. For this purpose, on the basis of the survey data within the HWGK water network, a 3D water hose below the water/land boundary must be diverted by means of fracture edges and incorporated into the raw terrain. In addition, longitudinal structures (e.g. walls, thresholds) that are included in the terrestrial surveys must be incorporated. The HydTERRAIN is to be delivered to the contractors and forms the basis of hydraulic 2D modelling. # Quality assurance HydTERRAIN: In hydraulic processing as part of a region-by-area update, the HydTERRAIN is further processed / corrected / supplemented by the contractors. In the event-related update, the HydTERRAIN is created by the engineering offices commissioned for the hydraulics. The DL-Daten checks and ensures the quality of the HydTERRAIN with regard to data homogeneity and hydraulic usability. # Support of the project management in the evaluation or preparation of the existing HWGK data sets for other stakeholders and specialist information systems in the state (FLIWAS, AKWB, AWGN, etc.) # The requirement profile for the DL data is characterized by comprehensive knowledge of ArcGIS Pro as well as extensive experience in programming in Python. Hydrological and hydraulic experience is an advantage. Based on previous experience, it can be assumed that the scope of the services corresponds to three full-time positions.