Oasis Innovation Hub for Catastrophe
and Climate Extremes Risk Assessment

WP2.1.3: Support for large scale investments in infrastructure and climate resilience – water treatment plant of Novi Sad

Novi Sad


The aim is to demonstrate the added value of the climate services and risk information generated in WP2 beyond the insurance sector, viz. to support adaptation decision making in the public and investment sectors.We will do this on the example of a planned large infrastructural investment in the Danube basin, a new waste water treatment plant for the city of Novi Sad, the second largest city in Serbia. It is worth noting that the implementation of the treatment plant is on the list of the Serbian investment plan for the EU Instrument for Pre-accession Assistance (IPA II)


The Future Danube model suite and OASIS Loss Model Framework will be applied to support the design of the planned waste water treatment plant of Novi Sad. The Pre-Feasibility Study (PFS) for the Novi Sad Wastewater Treatment Plant (WWTP) has been prepared within the Western Balkans Investment Framework (WBIF) as the main output defined within the approved Project Grant Application Form (PGAF) coded TA3-SER-ENV-01. The PGAF identifies following phases in the preparation of the documentation for the Novi Sad WWTP:

  • Elaboration of the PFS with Conceptual (General) Design;
  • Elaboration of the Feasibility Study with Preliminary Design;
  • Preparation of the Environmental Impact Assessment Study;
  • Preparation of the Tender documents using the FIDIC1 Yellow Book.

The Future Danube model suite and OASIS LMF Loss Model Framework will be applied in the second phase of the documents preparation process, in order to support the design of the planned WWTP of Novi Sad, which is on the list of the Serbian investment plan for the EU Instrument for Pre-accession Assistance(IPA II). Wastewater treatment plants are heavily affected by intense precipitation, resulting in flash floods, and by too high river water levels, which are expected to become more severe in the future (Hattermann et al. 2014). Thus, for the safety of operations, it is essential to ensure their climate resilience i.e. that their capacity and technology is adapted to possible extreme events under current and climate change conditions.

A serious problem is for example that floodwaters are usually contaminated with infectious microorganisms. In addition, floodwaters may also contain agricultural or industrial chemicals and hazardous agents present at flooded hazardous waste sites. Water contaminated with microorganisms, organic/inorganic chemicals and trace pollutants can heavily affect wastewater treatment plants, residential septic systems and municipal sanitary sewer systems during and after the flood event.

The investigation will further follow the non-paper of the European Commission called ‘Guidelines forProject Managers:

Making vulnerable investments climate resilient to current climate variability and future climate change’. FTNis preparing the feasibility study for the investment, and PPISwill apply the guidelines of the Commission. The guidelines define 7 modules to assess vulnerability and adaptation options while planning and executing the project.

Project Achievements

Preliminary activities involved analysing current climate and hydrological conditions, engaging the relevant data providers, stakeholders and policy makers and evaluating what relevant local data would be useful for the study. The data collected was applied to test and improve the Future Danube Multi-hazard, Multi-risk Model (FDM), a catastrophe model implemented in the OASIS Loss Modelling Framework (Oasis LMF). The model was implemented for the entire Danube Basin. High-resolution components for pluvial flood risks were further implemented for the city of Novi Sad, Serbia, after successful testing in the Budapest region. To assess vulnerability, observations and model results were used in a climate change impact assessment. The results clearly suggested pluvial flood risks and protective measures as part of the Novi Sad wastewater treatment plant (WWTP) construction, under current and future climate conditions. The most important outcome was that the implementation of the Climate Change Risk Assessment in the Feasibility Study of the WWTP in Novi Sad was approved.

Success comes from cooperation with Public Utility Company Waterworks and Sewerage Novi Sad, Republic Hydro-meteorological Service of Serbia, Public Water Management Company Vode Vojvodine, through workshops and technical meetings. During the first and second year of the Project, two Stakeholder Workshops were held in Novi Sad (March 5th 2018 and February 5th 2019).



The planned next steps are appraisal of adaptation options and proposal of adaptation action plan for the WWTP construction. Expected outcomes of the WP2.1.3. are to improve climate change resilience of the WWTP by adapting its design and construction, retentions, pipelines and pumping stations. This will facilitate better hygienic conditions in Novi Sad and safeguard potable water resources and quality of the environment in areas downstream and under the influence of the Danube River.

Project Results


Novi Sad Danube River Flood Recurrence Interval Projections


Novi Sad 100-year Fluvial Flood Map


Overlay Order


Expected Pluvial 10-year Flood Levels


Expected Pluvial 100-year Flood Levels


Extreme Climatic Conditions - Stochastic Climate Data (IMAGEv2)

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