Arctic demo site

Troms, NO

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Prognosis

Global warming is particularly strong at high latitudes. Change in precipitation and wind patterns will alter snow conditions and affect risks of avalanches. Higher temperatures and change of winds and precipitation will affect aquaculture and change conditions for fishery. In addition, climate change will lead to sea level rise, more intense precipitation, and stronger storms which increase the risk of flooding and storm surges.

Situation

The IMPETUS Arctic demonstration site, Troms County, is situated in the northernmost mainland of Norway, beyond the Arctic circle. This region of 26 000 km2 shares its eastern borders with Sweden and Finland, and has 170 000 inhabitants.

Seafood (form fishery and aquaculture) and tourism are the largest economic sectors, in terms of income  value to the region. In addition, reindeer herding plays an important cultural role. The region with its infrastructure and small communities is facing risk from landslides, rockfalls, avalanches and fjord tsunamis triggered for instance by landslides or rockfalls.  These natural hazards may increase in severeness due to climate-change-driven changes such as warming, intense precipitation, unstable snow cover, glacial retreat, flooding and sea level rise.

Climate related problems

Sustainable management of fisheries and aquaculture

Climate change has already had a significant impact on fisheries and aquaculture in Northern Norway, e.g. though marine heatwaves facilitating more parasites and warmer seas causing changes in fish migration routes.

Increasing natural hazard risks

Increasing temperatures and precipitation give more natural hazard events such as landslides and avalanches.

Flooding and water management

Rising sea levels and increased precipitation increase risks of flooding and challenge the urban infrastructure and water management along the coast, both today and in a long-term perspective.

Key actions

  • Marine spatial planning for marine protection and sustainable fishery.
  • Assessment of future avalanche problems, development of avalanche-danger forecasting tools and early-warning systems, and suggestion of adaptation pathways to mitigate avalanche risks.

  • Awareness raising involving stakeholders, and risk assessment related to sea level rise and flooding in inhabited areas.

Contact us

Demonstration site leader

Rune Grand Graversen

rune.graversen[@]uit.no

Co-leaders

Marie Stetzler

marie.stetzler[@]uit.no

Kai-Uwe Eiselt

kai-uwe.eiselt[@]uit.no

Events

News

Resources

Relevant sectors:

Municipality

Coastal zone planning

Public administration

Fishery

Aquaculture

Ski tourism industry

National road service

Urban planning

Citizens

Urban developers

Our ambitions

Climate change imposes threats to human life, infrastructure, and environment. We aim to provide knowledge and tools to plan for a safe transition of societies in the Arctic area. In our demonstration site we focus on coastal flooding, aquaculture and fishery, and snow hazards.

We develop a digital twin of a section of the coastal area in Northern Norway, Troms County. The digital twin will include relevant data for the area and provide 3D visualisation techniques.

We aim at contributing to the adaptation and climate-proofing of Tromsø city’s infrastructural systems, such as urban water management and a municipality project on climate adaptive development along the waterfront. We will also improve prognoses of future snow hazards and suggest solutions to mitigate these.

Our goal is that the developed tools can be adopted by planners to meet the climate challenges of the future and mitigate risks.

  • Introductory meetings with stakeholders
  • Introduce and engage key stakeholders to the digital tools and solutions being developed
  • Develop digital tools
  • Test digital tools with stakeholders and gather feedback
  • Public engagement
  • Apply and further integrate tools to support decision makers within the region
  • Share tools and knowledge with others
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Issues

Region-specific solutions

Early warning system for avalanches, rockslides, or landslides

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The risk posed by natural hazards on Arctic communities is expected to change as the Arctic becomes warmer and wetter under climate change.

To mitigate this risk, early warning systems, hazard maps and other avoidance measures can be used as a risk-reduction strategy. Two types of gravitational natural hazards occurring in the Arctic are slushflows and rock avalanches. A greater understanding of the physical processes taking place during hazard events, and of the initiation/timing of events, can help authorities to fine-tune the early warning and forecasting systems. This could also lead to enhanced risk reduction in the form of planning avoidance measures.

Our approach:

  • Increase the understanding of movements in unstable rock slopes and how weather and climate may lead to catastrophic rock avalanches. Data produced from the monitoring of the high-risk, unstable rock slope Gámanjunni-3 in northern Norway will be analysed for movements under different weather and temperature changes.
  • Develop a method for hazard mapping of the slushflow hazard. Development of a classification system for wet- snow avalanches andto slushflows is necessary to describe the diversity of behaviors observed.

This work is linked with:

  • NVE‘s monitoring and early warning system for rock slopes, NGU‘s hazard mapping of rock slopes in Norway.

Digital Twin for freshwater and marine management

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Evaluation of climate change risks is traditionally undertaken by combining impact modelling under different climate scenarios, with vulnerability and exposure assessments.

In most planning situations, the risk assessment is generated by overlapping different Geographic Information System (GIS) data layers. This is an effective methodology, which, however, is not easy for non-technical people to use or interpret. It is therefore difficult to use within stakeholder co-design processes.

 Our approach:

  • Demonstrate the potential of using state-of-the-art GIS representation of multiple variables with 3D visualization techniques.
  • Generate a digital twin of the region, providing visualisation of risk areas and possible impacts in an effective and user-friendly way.
  • Use the digital twin to support the co-design of Marine Spatial Planning decisions for better planning of fishery, aquaculture, and other marine uses.
  • Use the digital twin to support the co-design of climate-proofing actions to protect coastal cities from sea-level rise, storm surge, and flooding.

Our approach focuses on the co-creation of solutions by actively involving key stakeholders in both the design and validation of the tools. We use open datasets from national spatial data infrastructures and the Harmful Algae Event Database (HAEDAT).

This work is linked with:

  • Troms County Marine Spatial Planning programme 2021-2024
  • EU Destination Earth Initiative, DestinE
  • Water Framework Directive, Digital Single Market Strategy
  • Netherlands Delta Program
  • Greenathon by the Hellenic Ministry of Environment and Energy
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Sustainable management of fishery and aquaculture

Rising sea temperatures, ocean acidification, rising sea levels, along with more frequent and severe extreme weather events, significantly impact fish habitats, migration patterns, and reproduction cycles.

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"As marine environments are put under stress by increasing temperatures and a higher demand for space in the coastal zone, we hope to see that the integration of the Marine spatial planning framework leads to better informed decision-making and climate adaption in the region."

Andreas H. Hagset, Project Manager, Troms Fylkeskommune

Issue

Global warming and the resulting consequences influence fishery productivity, fish reproduction and health, as well as aquatic habitats. This leads to shifts in the distribution and abundance of fish stocks, affecting fishery, and in the suitability of sites for sustainable aquaculture. The climate change-related increase in extreme weather events further worsens these issues and enhances biological risks such as harmful algal blooms. These climate-related challenges necessitate adaptive planning strategies for both the short and long term.

To address this, the Arctic Demo site is developing a Geographic Information System (GIS)-based visualization tool to support the co-design of Marine Spatial Planning decisions between planners and stakeholders, for better planning for fishery, aquaculture, and other marine sectors.

Flooding and water management
Natural hazard risks increasing
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Natural hazard risks increasing

Northern Norway is a unique landscape with mountains jetting up out of the sea and fjords. This provides a major challenge for the road network, power transmission lines, and other important infrastructure.

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"Slushflows and wet snow avalanche occurrence will increase as rainfall in the Arctic increases by up to 40% with climate change. We must be prepared to adapt to these hazard events to ensure a safer society in the mountains, on roads and in settlements."

Louise Vick, UiT The Arctic University of Norway

"The risk of landslides to society in the Arctic is increasing due to event frequency increase due to climate change and from urbanisation. We do not fully understand the links between event drivers such as rainfall and mountain slope collapse leading to landslides. This relationship must be investigated further to have reliable and robust early warning."

Louise Vick, UiT The Arctic University of Norway

Issue

Many settlements and roads are built on the flatter terrain located at the bottom of a mountain slope near the coast or in valley bottoms. This leaves much of the infrastructure exposed to gravitational natural hazards such as snow avalanches, shallow landslides, and rockfalls.

With a warmer and wetter climate in northern Norway it is expected that the magnitude and frequency of gravitational natural hazards will change.

Sustainable management of fishery and aquaculture
Flooding and water management
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Flooding and water management

Tromsø city is located on an island in Arctic Norway, with the center being built mostly along the shore. Tromsø has been a fast-growing city for many years, and new buildings and infrastructure are settled at water areas through land reclamation.

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Issue

Increased precipitation, higher temperatures, and sea-level rise may affect urban water systems through more frequent storm surge and flooding. Other low-lying areas, such as the heritage district (“Gamlebyen”), built heritage sites, and commercial sites will be affected by flooding from extreme sea levels.

Tromsø is also affected by flooding due to sudden snow melting, occurring when temperature abruptly rises far above the melting point during winter, often associated with heavy rain. Such events are expected to increase with climate change.

These climate risks are challenging for the adaptation planning, both in a short and long-term perspective, as they are interdependent, complex, and affecting both public and private properties.

The Arctic Demo site is developing a digital twin as a tool to support municipal adaptive planning.

Natural hazard risks increasing
Sustainable management of fishery and aquaculture
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Flood risk

By 2050, sea-level within this region is predicted to rise by 15-40 cm, with more frequent extreme weather and more (severe) storms triggered by climate change. These changes will exacerbate the natural risk of flooding in the IMPETUS ‘Atlantic’ region, because it is surrounded by rivers and the sea, and is below sea level.

*Risk takes into account two aspects; the chance that an event will occur and the negative impact of such an event once it occurs. When there is a low chance that an event will occur, but its impacts are huge, the risk is still significant.

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Zeeland dike
Elevation map of Rotterdam and Zeeland
Elevation map of the IMPETUS 'Atlantic' site (© N&S)
Flood risk map of Rotterdam and Zeeland
Flood risk map of the IMPETUS 'Atlantic' site (© N&S)
Elevation map of part of the Netherlands
Elevation map of part of the Netherlands (© N&S)

“In the Netherlands, an extensive system of dikes protects us against sea and river flooding. We have always put our faith in this defence and focused almost solely on flood prevention. However, pressure on our system will increase with climate change and rising sea levels. To adapt and maintain a safe living environment, we should develop other safety measures, like more robust spatial planning and contingency plans."

Martine Rottink, Nelen & Schuurmans

Issue

Rotterdam city, is located in Rijnmond – ‘mouth of the Rhine’. The Rhine river flows through this densely populated area and characterises the region. Protections such as sea dikes and storm surge barriers have been constructed to protect the region, but flooding still occurs.

People living in the city are accustomed to seeing smaller floods. The changing climate affects the interplay between rainfall, river levels and sea storms, increasing the flooding risk. Water levels could rise by a few metres, even in populated areas, with potentially massive impacts. 

Mitigation measures such as storm surge barriers reduce the chance that high water reaches the city, but to minimise the impact of floods when they do occur, adaptation strategies are also needed. A city that can adapt to be safe from floods must be carefully designed. How best to design such an adaptive city?

Critical infrastructure, such as hospitals and evacuation routes, must be accessible at all times. Planning how to best protect them, homes and lives is complex. Flood water behaves in a complex way and flood risks show strong spatial variations. The IMPETUS Atlantic team is developing a digital tool to support regional decision making for adaptive city planning. 

Energy and waste water
High temperatures
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Energy and waste water

To become climate-neutral by 2050, climate mitigation* efforts are crucial in our strategy for how to deal with climate change. Reducing our energy consumption is a significant mitigation step. In the Netherlands, 15% of energy is consumed in the Rijnmond area around the port of Rotterdam, in large part by a major petrochemical industry cluster.

*Climate mitigation encompasses measures such as technologies, processes, or practices that reduce carbon emissions or enhance the sinks of greenhouse gases.

Map of Zeeland and Rotterdam in the Netherlands
Zeeland and Rotterdam in the Netherlands (© ESCI)
Zeeland dike
Zeeland dike

Issue

The Rotterdam port petrochemical industry cluster is Europe’s largest. It consumes 70% of the Rijnmond region’s energy. A large part of this energy is wasted (64%, 203 petajoules). More than half of that energy is lost with wastewater. In addition, most energy processes within these industries rely on fossil fuels, which has a significant impact on the climate.

Energy use must be minimised and fossil fuels should be replaced by renewable sources if climate change is to be mitigated. Electrification of processes opens up the possibility to use more renewable energy and can greatly impact decarbonisation. Recovering wasted heat would significantly reduce energy consumption and is a first step towards a more circular industry. 

Supporting industries in a transition towards climate-neutrality depends on identifying how best to reduce their carbon footprint without sacrificing production or performance. The IMPETUS Atlantic team is creating a digital tool that supports decision making about pathways towards an effective energy transition for EU industry.

High temperatures
Flood risk
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Oversvømmelse og vannforvaltning

Tromsø by ligger på en øy i det nordlige Norge, og sentrum er bygget langs sjøsiden. Tromsø har vært en by i rask vekst i mange år, og ny bebyggelse er bygget ut i havet gjennom masseutfylling.

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Problemstilling

I Tromsø by er ny bebyggelse og infrastruktur spesielt sårbar for havnivåstigning og stormflo. Andre lavtliggende områder som gamlebyen, bygde kulturminner og nærings- og industriområder, er også berørt.

Tromsø påvirkes også av flom på grunn av plutselig snøsmelting, som oppstår når temperaturen om vinteren plutselig stiger langt over smeltepunktet, værsitasjoner aom ofte er forbundet med kraftig regn. Slike hendelser forventes å øke med klimaendringer.

Disse klimarisikoene er utfordrende for planlegging av tilpasning, både på kort og lang sikt, ettersom de er komplekse og påvirker både offentlige og private eiendommer.

Det arktiske demonstrasjonsområdet utvikler en digital tvilling som et verktøy til støtte for kommunal tilpasningsplanlegging.

Risikoen for naturfarer øker
Bærekraftig forvaltning av fiskeri og havmiljø
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Risikoen for naturfarer øker

Nord-Norge er et unikt landskap med fjell som stiger opp av havet og fjordene. Dette utgjør en stor utfordring for veinettet, kraftoverføringslinjer og annen viktig infrastruktur.

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"Forekomsten av sørpeskred og våte snøskred vil øke etter hvert som nedbøren i Arktis øker med opptil 40 % med klimaendringer. Vi må være forberedt på å tilpasse oss disse skredfarene for å gjøre det trygt i fjellet, på veiene og i bygder."

Louise Vick, UiT The Arctic University of Norway

"Risikoen for jordskred for arktiske lokalsamfunn øker på grunn av økt skredfrekvens som følge av klimaendringer og urbanisering. Vi forstår ikke fullt ut sammenhengen mellom hendelsesfaktorer som nedbør og fjellskråningskollaps som fører til jordskred. Denne sammenhengen må undersøkes nærmere for å få pålitelige og troverdige varslinger."

Louise Vick, UiT The Arctic University of Norway

Problemstilling

Mange landsbyer og veier er bygget i flatt terreng nederst i en fjellskråning ved kysten eller i en dalbunn. Dette gjør at mye av infrastrukturen er utsatt for tyngdekraftssrelaterte naturfarer som snøskred, jordskred og steinsprang.

Med et varmere og våtere klima i Nord-Norge forventes det at omfanget og hyppigheten av tyngdekraftsrelaterte naturfarer vil endre seg.

Bærekraftig forvaltning av fiskeri og havmiljø
Oversvømmelse og vannforvaltning
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Bærekraftig forvaltning av fiskeri og havmiljø

Økende havtemperaturer, havforsuring, stigende havnivå og hyppigere og kraftigere ekstremværhendelser har betydelig innvirkning på fiskens leveområder, vandringsmønstre og reproduksjonssykluser.

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"Etter hvert som havmiljøene utsettes for stress på grunn av klimaendringene, og samfunnet har større behov for plass i kystsonen, håper vi at integreringen av Marin arealplanleggings rammeverket vil føre til bedre informerte beslutninger og til bedre klimatilpasning i regionen."

Andreas H. Hagset, Project Manager, Troms Fylkeskommune

Problemstilling

Global oppvarming og konsekvenser av denne påvirker fiskeriproduktivitet, fiskens reproduksjon og helse, samt endrer havmiljøet. Dette fører til endringer i fiskebestanders utbredelse og størrelse, noe som påvirker fiskerinæringen og lokale områders egnethet for bærekraftig havbruk. Økningen i ekstreme værhendelser som en del av klimaendringene forsterker disse problemene ytterligere, og øker risikoen for biologisk ubalanse, for eksempel på grunn av skadelige algeoppblomstringer. Disse klimarelaterte utfordringene krever planleggingsstrategier for klimatilpasning på både kort og lang sikt.

For å løse dette utvikler det Arktiske demonstrasjonsområdet et Geografisk informasjonssystem (GIS)-basert visualiseringsverktøy, som skal støtte utforming av beslutninger om marin arealplanlegging i samarbeid mellom planleggere og berørte parter for bedre planlegging for fiskeri, havbruk og andre marine sektorer.

Oversvømmelse og vannforvaltning
Risikoen for naturfarer øker
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Extreme events

Reports from European Environment Agency indicate that over the past decades, Europe has been experiencing frequent and severe weather and climate-related natural hazards like droughts, forest fires, heatwaves, storms and heavy rain. Climate change will make these events even more intense and more frequent. The summer of 2024 was the hottest on record for Europe and globally. While up to recently the extreme events were not considered usual in Zemgale region, experience from few previous seasons raise precautions. In summer 2024, there were heaviest rains that Latvia has experienced since 1945.

The impact of various extreme weather events has been particularly pronounced in places with high population density, such as the city of Jelgava. The region’s flat topography and land surface elevation relative to sea level result in high groundwater levels, which place additional stress on the city’s drainage and storm water drainage systems.

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Storm in Zemgale – damage on tourism infrastructure, 2023 (© Latvian Radio)
Storm in Zemgale – damage on tourism infrastructure, 2023 (© Latvian Radio)
Storm in Zemgale, 2023 (© Latvian Radio)
Storm in Zemgale, 2023 (© Latvian Radio)
Damaged corn field in Zemgale, 2023 (© Latvian Radio)
Damaged corn field in Zemgale, 2023 (© Latvian Radio)

Issue

In Jelgava, the main challenges from rainfall include high risk of flooding and damage to infrastructure during prolonged rainfall. The Lielupe River and its tributary floodplains, as well as low topography and high-water tables, make drainage and stormwater drainage systems difficult to operate. The extreme rainfall of July 2024 confirms that the existing sewerage system is inadequate to cope with such situations.  In the region’s rural areas, the threats affect both settlements and villages and fertile agricultural land, which plays an important role in the region’s economy.

Storms are the second most pronounced weather extreme in the region and, although on average winds are not expected to change significantly over the 21st century, by the end of the century (relative to the period 1971-2000) there will be a greater number of both windless days and stormy days per year.  In recent years, the Zemgale region has been severely affected by thunderstorms and storms that have brought heavy rainfall in the form of both rain and hail, destroying agricultural crops and damaging infrastructure in many places. Severe storms in summer and early autumn, when trees and shrubs are still in leaves, have caused severe damage.

Climatologists believe that the current extreme values will become the norm in the future, while extreme weather events will cause even more damage. Climate models also predict an increase in total annual precipitation over the 21st century, with an average annual precipitation in Latvia of 775.7 [±60.0] mm for minor, 806.5 [±72.8] mm for moderate and 814.2 [±79.7] mm for major climate change. Predictions foresee substantial increase in duration of heatwaves from climatic norm of 8 days to 16 [±8] days for minor, 22 [±9] days for moderate and 33 [±12] days for major climate change.

Forecasting extreme weather events is quite complicated task, as these events are characterized by short-term nature, they and spatially limited, and thus short warning times are operational. Measures for adaptation to climate change thus become essential by preparedness for more days with extreme temperatures and for more extreme precipitation events. Decision-makers and local authorities need data and information to make the necessary preparations in advance by adapting to the different scenarios and possible consequences.

Within activities of IMPETUS project, the Adaptation Pathways are elaborated for Zemgale region with particular focus on flooding occurrences from river spring floods and heavy rain events:

  • Adaptation pathways are developed to support in better management of river flood risks and heavy rain floods (flash floods).
  • Aimed to implement a set of measures for reducing the frequency and extent of flooded areas in both rural (agricultural) land and urban settlements.
  • In exchange with the stakeholders, adaptation options are identified, assessed and included in the pathways to increase adaptive capacity in Zemgale region.
  • Structural measures, e.g., upgrading of existing drainage and stormwater drainage systems, and aligning them with nature-based solutions for water retention in rural and urban areas, and cleaning of riverbeds are considered.
  • Non-structural measures for improving flood risk early warning system (EWS), increasing awareness of inhabitants and improving the efficiency of actions of competent authorities in case of floor risks are addressed.
Flooding
Eutrophication
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Flooding

Zemgale is a very flat region, located in a lowland area with a high density of rivers. The Lielupe River is characterized by its slow course, due to Zemgale’s flat topography and the low gradient of the riverbed. The height of the Lielupe floodplain does not exceed 1 m above water level. Downstream of Jelgava, the Lielupe River drops only 5-10 cm/km. The riverbed is much lower than the average level of the Baltic Sea.

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River Svēte in Jelgava; Photo by Valters Toropovs
River Svēte in Jelgava; Photo by Valters Toropovs
Flooded area in city of Jelgava; photo by Zemgale planning region
Flooded area in city of Jelgava; photo by Zemgale planning region

Issue

Climate change in the Zemgale region by the end of the 21st century will have a major impact on the hydrological regime.  One of the most significant changes will be increased precipitation: under a moderate climate change scenario, winter precipitation will increase by 24-38%, while under a significant climate change scenario, precipitation is expected to increase by as much as 35-51%. Maximum daily precipitation will increase by about 3-6 mm, in some places by as much as 10-12 mm. On a seasonal basis, the greatest increases in precipitation are expected during the winter and spring seasons, so that the risk of flash flooding increases significantly during the cool season, when evapotranspiration is not intense. Periods of high rainfall will alternate with prolonged droughts, which will have a particular impact on heavy rainfall events, increasing the frequency of flash floods. During heavy rainfall, short, localised flooding can be observed in both larger and smaller towns, as well as in flat rural areas.

One of the activities in Zemgale in the IMPETUS project is the improvement of the Flood Early Warning System using the HEC-RAS 2D model. This model simulates water flow in two dimensions, which is particularly useful for flood modelling and forecasting. The HEC-RAS 2D model uses two-dimensional Diffusion Wave Equations to calculate the water flow. The developed model performs 2D

Key Benefits of Using Such a Hydraulic Model

  1. Accuracy and Detail: The HEC-RAS 2D model provides high accuracy and detail, which is essential for flood risk assessment and management.
  2. Integration: The HEC-RAS 2D model can be integrated with other geographic information systems (GIS), facilitating data processing and visualization.
  3. Early Warning Systems: The model is crucial for the development of early warning systems, as it allows for the prediction of flood spread and impact, thereby helping to timely warn residents and take necessary measures.
  4. This solution automatically reads hydrological forecast data from the forecast system of the Latvian Environment, Geology and Meteorology Centre.

These model results are crucial for the operation of the Early Warning System, which uses this data to identify potential flood areas and prepare warnings at the property (cadastral unit) level.

Eutrophication
Extreme events
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High temperatures

Record-breaking summertime temperatures have been recorded in the Netherlands in recent years. With global temperatures rising, such extreme weather events will occur more often, and for longer periods. Prolonged high temperatures, with warm nights as well as hot days, can cause heat stress* and related health issues, particularly among city populations.

*Heat stress occurs when the human body cannot get rid of excess heat and can impact wellbeing through conditions such as heat stroke, exhaustion, cramps and rashes.

Map of Zeeland and Rotterdam in the Netherlands
Zeeland and Rotterdam in the Netherlands (© ESCI)
Heat stress map of Zierikzee in Zeeland
Heat stress map of Zierikzee in Zeeland (© N&S)

"We want to enable municipality decision makers who are working on spatial developments to identify heat stress 'hot spots' and cool areas, analyse the future effects of climate change, and model the effect of different heat stress-reducing measures. The tool must provide them with an easy starting point to integrate heat stress risks in their projects."

Martine Rottink, Nelen & Schuurmans

Issue

Despite the cooling effect of the sea in the region of Zeeland, the growing risk of heat stress has become a concern.

Elderly and other vulnerable people are more impacted by the effects of prolonged heat, which can cause headaches, dizziness, insomnia and other health issues – even death. Excess temperatures also affect general comfort and liveability of cities. Water quality can be reduced, both for drinking and swimming, and infrastructure can be affected. Buildings and concrete surfaces trap heat, potentially leading to damage, and release it during the night, keeping temperatures warm.

During heat waves, it is important that everyone has access to a cool and comfortable place. Appropriate spatial planning can help to decrease and deal with heat stress. Environmental factors like water bodies, trees, and shade have a major impact on stress caused by high temperatures. Therefore, planting trees, removing concrete surfaces, creating green roofs and cool spaces can improve our comfort and health. The IMPETUS Atlantic team is developing a digital tool to support regional decision making for city planning to address these needs.

Flood risk
Energy and waste water
icon_flood

Issue name

Record-breaking summertime temperatures have been recorded in the Netherlands in recent years. With global temperatures rising, such extreme weather events will occur more often, and for longer periods. Prolonged high temperatures, with warm nights as well as hot days, can cause heat stress* and related health issues, particularly among city populations.

*Heat stress occurs when the human body cannot get rid of excess heat and can impact wellbeing through conditions such as heat stroke, exhaustion, cramps and rashes.

Map of Zeeland and Rotterdam in the Netherlands
Zeeland and Rotterdam in the Netherlands (© ESCI)
Heat stress map of Zierikzee in Zeeland
Heat stress map of Zierikzee in Zeeland (© N&S)

"We want to enable municipality decision makers who are working on spatial developments to identify heat stress 'hot spots' and cool areas, analyse the future effects of climate change, and model the effect of different heat stress-reducing measures. The tool must provide them with an easy starting point to integrate heat stress risks in their projects."

Martine Rottink, Nelen & Schuurmans

Issue

Despite the cooling effect of the sea in the region of Zeeland, the growing risk of heat stress has become a concern.

Elderly and other vulnerable people are more impacted by the effects of prolonged heat, which can cause headaches, dizziness, insomnia and other health issues – even death. Excess temperatures also affect general comfort and liveability of cities. Water quality can be reduced, both for drinking and swimming, and infrastructure can be affected. Buildings and concrete surfaces trap heat, potentially leading to damage, and release it during the night, keeping temperatures warm.

During heat waves, it is important that everyone has access to a cool and comfortable place. Appropriate spatial planning can help to decrease and deal with heat stress. Environmental factors like water bodies, trees, and shade have a major impact on stress caused by high temperatures. Therefore, planting trees, removing concrete surfaces, creating green roofs and cool spaces can improve our comfort and health. The IMPETUS Atlantic team is developing a digital tool to support regional decision making for city planning to address these needs.

Flood risk
Energy and waste water
icon_fertilizer

Eutrophication

Due to its fertile soils, Zemgale region in Latvia is characterised by an intensive agriculture where large-scale farming dominates. Agricultural activities are well developed and focus on the cultivation of crops.

During the last decade, the area of croplands in the region has increased along with application of high amounts of mineral fertilisers. Excessive loading of nutrients (nitrogen and phosphorus) lead to eutrophication of water bodies e.g., causing overgrowing of rivers, and thus putting a pressure on biodiversity and natural habitats.

Crop fields in Zemgale
Crop fields in Zemgale
Crop fields in Zemgale
Crop fields in Zemgale
Eutrophication in a water body in Zemgale
Eutrophication in a water body in Zemgale
Ecological quality of water in water bodies of Latvia in 2021 (source: State Limited Liability Company “Latvian Environment, Geology and Meteorology Centre” - LEGMC)
Ecological quality of water in water bodies of Latvia in 2021 (source: State Limited Liability Company “Latvian Environment, Geology and Meteorology Centre” - LEGMC)

Issue

Municipal wastewater effluent is another source of eutrophication in the region. Quite often performance of wastewater treatment facilities is not sufficiently effective to ensure complete purification of waste waters causing water pollution with nutrients. As the result the ecological water quality of the rivers in Zemgale region is mostly moderate or bad.

According to water quality monitoring data of 88 waterbodies located within the Lielupe River basin district, there are 53 waterbodies having significant disperse pollution load and 14 water bodies where point source pollution load prevails (Source: LEGMC, 2024).

Climate change related increase of temperature catalyses eutrophication processes in water bodies. Climate models predict continuation of the increase of temperature thus intensifying the symptoms of eutrophication in freshwaters. Therefore, along with reduction of use of fertilisers, improvement of municipal wastewater treatment facilities, application of additional measures to prevent nutrient runoffs from agricultural land and urban environment to water bodies is of pivotal importance.

Together with regional and local stakeholders in Zemgale region, IMPETUS project partners in Latvia are developing Zemgale regional climate change adaptation plan, that will highlight the possibilities and intention of implementation of nature base solutions, e.g., constructed wetlands in Zemgale region to reduce the nutrient leakages/runoffs, reduce eutrophication intensity and improve the quality of surface waters.

Extreme events
Flooding