District-by-district and community-specific inventory of water supply structures. Water volume balancing. Assessment of security of supply. Recommendations for action to secure the drinking water supply. GIS data management.

Against the background of the “drought summer 2018” and the increasingly clear signs of climate change, the state of Baden-Württemberg has initiated the “Water Supply Master Plan”. As part of the master plan, the contractor must estimate the future development of water resources, compare this with the growing demand for drinking water and ascertain the structure of the water supply. The surveys and investigations must be carried out by the contractors for each district and for each municipality.

The future development of water resources is to be estimated and compared with the forecast development of water demand. For this purpose, the current groundwater availability must be shown and a forecast with a time horizon up to 2050 must be drawn up using long-term observations, stress tests and climate projections. On the basis of forecasts by the statistical office of the BW, the contractors must estimate the population development and future drinking water demand, especially with regard to the daily peak demand during hot periods. Future additional requirements can be derived from the balance sheets. In addition, the security of supply must be assessed. In addition, data on failure safety and raw water quality must be recorded. Measures are to be derived from the data and assessments collected and recommendations for action to be developed for specific municipalities.

The necessary structural data (extraction wells, water supply structures and pipes, supply areas) with the associated information must be collected digitally using a GIS application. The results of the surveys and investigations are to be made available by the contractors to the responsible authorities and municipalities in the form of reports for each district (with recommendations for action specific to the municipality) and as a state-wide geodata set (GIS) and a digital map layer (GIS) based on it.

At the end of the service provision, the data and results of the surveys are to be entered in a project database at the State Agency for the Environment in Baden-Württemberg in accordance with predefined specifications.

The project is planned for a total of 5 years for the nationwide survey in the 44 rural and urban districts.

The subject of this tender is the survey for so-called "Charge 1". This consists of 11 urban and rural districts, which in turn are grouped into 6 lots. The first batch of surveys is scheduled to begin in September 2021. A processing time of 12-13 months per lot is estimated for the survey and evaluation.

Same wording as lot 1

Same wording as lot 1

Same wording as lot 1

Same wording as lot 1

Same wording as lot 1