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Determination of flood hazard maps for the Pützer Bach
Ermittlung von Hochwassergefahrenkarten für den Pützer Bach — original title
Your path to submission
- Deadline: 6 November at 12:00 — 5 days left.
- You submit on evergabe.NRW — not here and not by e-mail. ↗ Free bidder account on the cosinex platform required (created instantly); offers go through the bidding tool, usually plain text form suffices — no qualified signature. Sort out account and signature first — not on submission day.
- Collect your evidence — the eligibility requirements are listed on this page; for many of them the analysis explains how to obtain them.
What the buyer is looking for
In accordance with Article 6 of Directive 2007/60/EC of the European Parliament and of the Council of 23 October 2007 on the assessment and management of flood risks (EC-HWRM Directive) [1], flood hazard maps and flood risk maps are drawn up. For this purpose, flood areas of various scenarios for defined water sections must be determined on behalf of the District Government of Cologne (hereinafter referred to as "BRK") (see Part II, Chapter 2). In addition, the water depths, the water level positions and the flow velocities must be calculated. Compared to the 1st and 2nd The procedure for drawing up flood hazard and risk maps has changed over the course of the cycle. In 3. Cycle creates and publishes the maps standardized by the state of NRW. The basis for this is defined result data, which are stored in a central database of the country. Within the scope of this project, this result…
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… data will be developed. In addition, maps for the participatory procedure for the formal establishment of the flood plain shall be drawn up for the flood plains of the centenary flood. The Pützer Bach has a catchment area of 36 km2. Due to the relatively small size of the catchment area, it can be assumed that heavy rainfall and flood events are directly related throughout the catchment area and are very likely to occur at the same time. Therefore, a flat precipitation load of the 2D model takes place. For the preparation of the flood hazard maps, a delimitation of the water-related flooding areas is then necessary. Scope of the service The following steps must be carried out by the contractor (hereinafter referred to as the "Office") and are further specified in Part II and Part III of these specifications: - Determination of the geodetic input variables, adoption and testing of the terrestrial water survey carried out by the Erftverband, creation of a digital terrain height model. - Creation of a 2D hydraulic model for the entire catchment area of the Pützer Bach (including Kalrather Fließ). The water area, including the river hose, must be mapped with a flexible net. A grid based on DGM1 shall be used for the remaining area of the catchment area. - Calibration of the 2D hydraulic model by simulating the heavy rain/flood event of 08/09/09/2025 and comparison with existing flood marks and information on this flood event. - Loading of the calibrated model with model rain (KOSTRA 2020). Analysis and comparison of model rain variants with existing runoff target values. Determination of drainage lines/outflows for the waters Pützer Bach and Kalrather Fließ on the basis of the performed 2D calculations with model rain. - Separate hydraulic calculation of the water level layers (2D) and flow velocities of the flood drains for the waters. - compilation of the data for the flood hazard maps (grids of water levels and water depths (GIS) as well as the areas of floodplains and flood-prone areas (LAWA designation "protected areas") as geopackage (qpkg file) [4]). - drawing up the maps for the participatory procedure for the formal identification of the floodplain. - Carrying out meeting appointments.
Contract
Type of service
Clement What the numbers say about this buyer
- In this sector the buyer awards roughly every 6 months (30 awards, most recently October 2026) — the next award is due around April 2027 by that rhythm. The last award went to MILAN Geoservice GmbH.n = 30
- 38% of the bids received came from other countries (8 procedures with a bid mix) — all bidders, not just the winners. Sector: 2%.n = 8
- The median procedure drew 6 bids (114 procedures with a bid count); 16% ended with a single bidder. Sector: median 3 bids.n = 114
- 42% of this buyer's awards went to companies that had already won here before (119 awards since 2017, spread over 65 companies). 58% went to new names.n = 119 awards since 2017
- 4% of awards went to companies from abroad (119 awards with a known winner country). Sector average: 0%.n = 119
From this buyer's documented awards; comparison values from the same sector and country. Not a forecast, not legal advice. As of 01/11/2026.
Who has won at this buyer so far
Across all contract types of this buyer — not just this sector. A city buys software and fire engines through the same purchasing office.
| Company | Awards | Period |
|---|---|---|
| Hansa Luftbild AG | 9 | 2011–2025 |
| BSF Swissphoto GmbH · Schönefeld | 9 | 2009–2024 |
| GeoFly GmbH | 6 | 2021–2025 |
| AVT Airborne Sensing GmbH · Greven | 6 | 2022–2026 |
| PRIMIS spol. s r. o. | 6 | 2024–2026 |
How often this buyer tenders this kind of work
Contracting authority contact
Tactics
When this buyer has awarded in this sector, usually 6 or more bids came in. Many compete here — price and references decide. (Based on 95 completed awards — not a statement about this procedure.)
This procedure allows 14 days between publication and deadline — typical in this country is 32 (median of 20,496 procedures). Much tighter than usual: the first week counts.
Foreign bidders
In Germany · Architecture & engineering, 404 contracts went to foreign companies over the last 3 years (of 111,169 recorded awards) — mostly from Austria, Switzerland, Poland.
How to bid
Guide: how to apply on cosinex Vergabemarktplatz / DTVP → Registration, signature, fees — from the operator's bidder manual.
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