Anti – flood Measures to Protect Prague Zoo and the Troja riverfront |
Tender for the study is already published on this profile: www.tenderarena.cz. Candidates can participace in the tender until 12. 8. 2019 at 10:00.IntroductionThe Prague Institute of Planning and Development (IPR) drafted the Conception of the general landscaping solution of Císařský Island and its surroundings (2015-2017), in which it defined the main values of the Troja Valley alluvial plain and proposed solutions improving the transport and pedestrian accessibility of the area, strengthening the character and ecological values of the alluvial plain, and defining the natural water management revitalization of the Vltava River (“Wild Vltava“) with the aim of compensating the impacts of the newly constructed wastewater treatment plant line on the local landscape.
The focal point of the proposed solution is Císařský Island, and the solution was prepared in the form of a groundwork study by authors from a team led by architect Petr Pelčák, including landscape architect Eva Wagnerová, water management engineer Miloslav Šindlar and traffic engineer Václav Malina. The broader surroundings of Císařský Island was included primarily to allow for a quality solution of the landscape conception and certain other area connections and permeability possibilities. The Troja riverfront solution will also require a more detailed verification because the Concept did not initially address the linear anti–flood measure protecting Prague ZOO.
IPR Prague , acting under a commission from Prague City Council, and in line with recommendations formulated by the council’s Standing Committee for Anti – flood Protection, is tasked with procuring and processing groundwork documentation for a study addressing the “model evaluation of the impact of increased anti – flood protection for Prague Zoo (and Troja Chateau) during the passage of high waters through Troja Valley.” The procurement of documentation and definition of the linear anti – flood protection measures do not in and of themselves guarantee the sensitive integration of infrastructure into the landscape or a solution to the problems and potentials of the adjacent areas. The Concept recommends that quality architectural and landscape solutions are produced for individual projects that would compensate for any potential detriments in the monitored parameters, from the perspective of potential flood throughflow (model survey) and the perspective of landscape and nature (an architect/landscape architect team). The reason for this commission is to involve a team able to produce an urbanistic/architectural/landscape solution and to integrate the construction work into its environs, including subsequent solutions for public spaces and open areas. Such a process will also facilitate discussion of the anti – flood measures themselves. Purpose of the studyThe objective of the commission is to obtain an urbanistic/architectural/landscape solution proposal, including integration of the anti – flood measures into their environs, and including public space and open area solutions (taking into account the migration of protected species such as the dice snake, the directions of collisional recreational routes along the riverfront, public spaces and certain heritage sites). The design and definition of the anti – flood measures will take place in close cooperation with the author of the groundwork documentation for the model survey.
Specification of requirements for the assessment criteria Coordination schedule – detailed Coordination schedule – simplified
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River revitalization of the Wild Vltava |
Objective of the studyThe “Wild Vltava” project aims to revitalize the Vltava River in a natural way along Císařský Island, including broadening the riverbed, new islets and a passage crossing Císařský Island. The main contributions of this project are to improve throughflow conditions during flooding, to strengthen alluvial plain values, to renew natural river processes and to expand recreational and educational opportunities.
This project is defined in more detail in the Císařský Island Action Plan, Measure 2, P.2 and in the Císařský Island Concept (drawings section, see the chapter addressing the Water Management Compensation Measures on pp. 73-81 and the text part in the Report, sub-chapter addressing Vltava River Revitalization on pp. 22–27). We anticipate the revision and elaboration of the proposed solution, however the overall concept and principles of the proposal should be retained or discussed in detail with the contracting authority. The proposal will be verified using mathematical and physical modeling. The detailed timeline and individual synergies are described in the coordination timeframe in a separate annex → Annex / 03, 04
The main emphasis focuses on completion of the architectural/landscape/water management solution taking into consideration optimization of the compensation anti – flood measures, improvement in the hydro – morphological and ecological condition of the site, recreational use, ownership relationships, maintenance and administration, the various competing interests of the involved subjects etc. More information is provided in ‘Project Objectives.’
Main objectives of the study
Tender Tender for the study explained above is already published on this profile: www.tenderarena.cz. Candidated can participace in the tender until 17. 7. 2019 at noon (12:00). |
Documents to download |
Various interests come together on the alluvial plains of Troja Valley: economical, infrastructural – related, recreational, environmental and more. Individual projects therefore need to address a wide range of perspectives, while the proposed solutions need to be sensitively integrated into the Valley in line with the Císařský Island development concept and other aspects. From the perspective of anti – flood measures, Troja Valley represents one of the narrowest and most critical points in Prague. Individual projects and plans therefore need to be mutually coordinated and evaluated from the perspective of their impact on the throughflow of large amounts of water and, where necessary, need to compensate for any negative impacts.
Through the Resolution, Prague Institute of Planning and Development (IPR) was commissioned to prepare a number of partial studies under the title ‘Revitalization and Anti – flood Protection of Troja Valley in the form of a partial fulfillment of the Císařský Island Action Plan.’ The main outputs stemming from a joint evaluation undertaken using mathematical and physical flooding models under the determined guidelines should be the following studies:
- Anti – flood protection of Prague Zoo (and Troja Chateau) including a Troja riverfront
- Natural revitalization of the Vltava River – the Wild Vltava project
- A new connection between Bubeneč and Císařský Island and Troja via a new footbridge
Main goals of the projects
1. Anti – flood measures and revitalization of the river
- Anti – flood measures protecting the Zoo (and Troja Chateau)
- Improvement of conditions for the passage of floodwater through the Vltava flow profile
- Renewal of the hydro – morphological conditions of the Vltava River in Troja Valley
- Improvements in permeability for migrating fish
2. Landscape development
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Landscape revitalization – reconstruction of landscape values in the alluvial plains and the watercourse – from both the perception and cultural perspectives
- Integration of individual infrastructure projects into the Troja Valley landscape and compensation for any potential negative impacts
- Reconstruction and development of natural ecological relations, support for biodiversity and target species’ habitats
3. Use
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Creation of new opportunities for recreation, play and leisure time activities for the denizens of Prague
- Creation of new opportunities for education and awareness
Approximate timeframe
- Proposal drafting: 4.5 months
- Evaluation of the mathematical model (modification of proposals and elaboration of solutions independent of the anti – flood modelling): 3 months
- Physical modelling (elaboration of solutions independent of the anti – flood modelling): 4 months
- Final evaluation of the mathematical model: 2,5 months
- Discussion: 2 months
Involved stakeholders
A wide range of parties will be involved in this project. The core will be formed by a working group that will meet on a regular basis, including engineers and other experts from the given fields. Working groups defined in the timeframe will meet with all the relevant professional consultants – engineers.
In order to involve other parties, a project platform will be set up to meet 4 times during the project term. The objective of the platform is to foster open discussion about all individual requirements, which should assist the engineers in finding the optimal, discussable solution. Individual consultations of projects with individual experts will take place as required.
In addition, there will be a presentation prepared by IPR Prague, allowing the general public to participate in the process. Engineers will be provided with results obtained from the participative mapping process at the beginning of the project. Subsequently, a participative walkthrough will take place, and a participative meeting over the first draft of the proposal at the end of the 1st phase. More detailed information is provided in the detailed coordination timeline. A preliminary list of the individual participants involved in the process follows:
The Wild Vltava project is defined within the Action Plan for Implementation of the Conception of the general landscaping solution of Císařský Island and its surroundings, approved by the Prague City Council through its Resolution No. 2054 dated on 29 August 2017. The Action Plan defines this project as a pilot and priority investment project.
The pre – implementation preparation for the Wild Vltava project will ensure a multi – purpose, verified and feasible solution for the subsequent investment project. The Wild Vltava project also forms a part of the implementation plan within the Prague Climate Change Adaptation Strategy approved through Resolution No. 1650 on 26 June 2018 and in the R1 Realisation Programme within the Prague Strategic Plan.