Stress test providers

A “climate stress test” enables you to identify the locations in your area that are prone to urban flooding, waterlogging, drought, or heat. This will give you a clear picture of the issues that a local adaptation strategy needs to address. The Stress Test Light Manual enables you to simply conduct an initial exploration into potentially vulnerable locations in your area. An exploration in accordance with this manual counts as a “standardised stress test”, which all governments must have conducted by the end of 2019 as stipulated in the Delta Plan on Spatial Adaptation.

In addition, (in-depth) stress tests are offered by several parties in the Netherlands. Some of these providers are listed below. The list of providers is neither selective nor filtered. Consequently, a place on the list below does not mean that the stress test offered meets a particular standard, or that the standard stress test will automatically be conducted.




Climate change prompts increasingly more municipalities to commission stress tests. Such tests serve a twofold goal, viz. mapping out high-risk areas and drawing up measures aimed at realising a climate-adaptive environment. Adcim consulting engineers commands a great deal of experience in mapping out and analysing locations prone to waterlogging, and in designing feasible solutions.

Bottlenecks, if any, in these systems are mapped out using a hydraulic calculation model of the sewer and water system. Subsequently, the elevation model of the surrounding area is analysed in order to map out low-lying and consequently high-risk areas. Any combination of a bottleneck in the sewer system and a low-lying location at ground level involves an especially vulnerable situation. A 2D calculation in combination with the sewer model will provide insight into the scope of the risk. Appropriate solutions are devised in collaboration with the stakeholders.

In addition to more frequent and more intensive downpours, climate change is also causing temperatures to rise. This poses a particular challenge for urban environments. In this respect, Adcim can also support you in mapping out high-risk areas, and in devising and elaborating appropriate solutions. They thus contribute to the liveability of residential areas.

Contact: Arjan de Kloe I I I 0184-677500

Antea Group



Antea Group have developed various methods to predict and prevent pluvial flooding of urban areas. These methods provide insight, at various levels of detail, into how rainwater drains away underground and above ground during an extreme downpour, and where this could cause inconvenience or nuisance. Collaboration with other institutes, such as Deltares, enables them to incorporate the latest data and models.

The results are presented on a map and in 3D animations, which makes them accessible to a wide audience. This enables administrators, residents, and engineers jointly to explore resources and measures to reduce and prevent pluvial flooding.

Contact: Benno Steentjes I I I 06-10947421




Municipalities, district water boards, and other partners have joined forces to climate-proof cities. In actual practice, some of the measures taken still lack the interconnectivity that is aimed for, and stagnation occurs in the implementation stages. ARCADIS can help you accelerate and structure climate adaptation using our Climate-Proof City road map. The first step in this road map involves a climate stress test.

Since 2014, Arcadis has conducted stress tests for municipalities using the KlimaatTRAP methodology, to map out the consequences of climate extremes in terms of pluvial flooding, heat stress, drought, and air quality. The information used is publicly available, thus eliminating the need for major efforts on your part. The well-organised map material and the appealing reports provide you with a means of communication to involve administrators and stakeholders in the climate taskings and future-resilient choices. Working together to climate-proof the city!

Contact: Bas Bierens I I I 06-50736783

Aveco de Bondt

aveco quickscan


The liveability of our cities is being put under increasing pressure. The proper design of new developments and the proper re-design of existing structures can prevent or resolve a great deal of distress. To help you achieve such designs, Aveco de Bondt has developed quick scans for:

  • Heat stress
  • Pluvial flooding in extreme precipitation situations
  • Vegetation index
  • Opportunities and risks of dykes and dams – flood risk management, groundwater, NGEs [Dutch size units]
  • Opportunities for participation

Examples are available on the website.

Contact: Thijs Visser I I I 06-51085947


Stresstest BOOT


BOOT Engineers has developed several stress tests to map out where our living environment is vulnerable to extreme weather situations. The stress tests provide insight into the locations and underlying causes of such vulnerabilities.

BOOT has ample experience in visualising the performance of urban water systems. The waterlogging stress test developed by BOOT provides insight into both subsoil runoff (sewers) and surface runoff, and into the interaction between these two components. In addition to above-ground measures, the result attained thus also comprises subsoil measures.

To map out vulnerable locations prone to heat stress, BOOT has developed the National Heat Stress Map. This map shows the areas throughout the Netherlands that are vulnerable to heat stress. Further analyses generate more details on each specific area.

The climate tasking is addressed in collaboration with the stakeholders and on the basis of the insights gained. An effective schedule of measures enhances the climate resilience of our living environment. BOOT commands all the expertise required to this end.

Contact: Bertrick van den Dikkenberg I I l I 06-57719549


BWZ Ingenieurs


As a multi-disciplinary engineering office, BWZ is actively engaged in mapping out bottlenecks in the fields of waterlogging, drought, heat, and urban flooding. On behalf of parties such as municipal authorities, they explore the impact of climate change (such as changes in groundwater level) on trees and the associated heat stress in urban areas. A great deal can be done on the basis of existing data and a stress test by BWZ Ingenieurs can rapidly identify an area’s opportunities and bottlenecks.

Since outdoor spaces involve the convergence of many aspects, their civil engineers, greenery experts, designers, and hydrologists work together in a single team. This approach generates measures that factor in all the aspects of a well-designed space. For the visualisation of preventative measures, BWZ will perform calculations and design, inter alia, quays and dykes. They will also identify and design the required (emergency) water storage facilities at the lot, area, or neighbourhood level.

BWZ has a tool that can be used efficiently for determining and enhancing the natural value of the greenery designed. Greenery that is designed in such a climate-adaptive manner is more vigorous, has that location as its natural habitat, is healthier, lasts longer, and entails lower maintenance costs.

Contact: Marcel van Dorst  I I I 06-21633730

Cobra adviseurs

Cobra adviseurs


Weather in the Netherlands is becoming warmer, drier, wetter, and more extreme. This has a major impact on the living environment. Cobra Consultants will map out the problems and how the changing climate will impact the trees in the street. They are familiar with the green living environment, and they know all the trees in the Netherlands, where they are located, and what value they represent.

They create stress tests in the fields of greenery, temperature, water, ecology, and CO2, or map out which trees will be the first to succumb when the weather becomes drier. Cobra Consultants not only know how the climate will impact the sustainability of the tree population, they also know how trees affect the urban climate! To this end, they combine the Tree Monitor, covering the nearly one hundred million trees in the Netherlands, with “nearly live” heat and moisture stress maps. They also provide up-to-date maps showing the extent to which gardens or public spaces are paved.

The combination of comprehensive information and live sensor data produces a rock-solid concept. They measure tree safety, ambient temperature, luminous intensity, and air and soil humidity “nearly live”. Thus, they map out how the climate in our environment is doing.

Contact: Joost Verhagen I I I 088 – 262 72 22




Fugro is a specialist in the fields of (ground)water and the subsoil. Fugro commands expertise and holds comprehensive sets of data to support you in drawing up reliable stress tests, and to conduct research into the (short-term, medium-term, and long-term) impact of climate change on waterlogging, excessive groundwater levels, drought, settling, and foundations.

Among other things, the Fugro database contains a wide range of probing and foundation data. This data can form the basis for conducting an initial analysis of the risks and opportunities, and for drawing up specific and pragmatic advisory reports for the climate-adaptive design of existing and new development areas. If need be, a detailed study can be conducted, utilising the expertise of specialised (field) researchers and specialist consultants.

Contact: Wouter Kooijman I I 06-51350982




Gebiedsmanagers Engineering Consultancy operates at the heart of the civil engineering field. Here, they perceive the impact of climate change: extremes in terms of heat, precipitation, and drought. This increasingly urgent tasking calls for pragmatic adaptation. Gebiedsmanagers views climate adaptation as an integrated tasking for which they pursue practical, feasible solutions.

To this end, Gebiedsmanagers has developed an innovative, area-specific application: an online area portal. This portal offers a simple method to identify heat stress, waterlogging, and vulnerable locations. The portal is combined with available public data such as aerial photos, the Key Register of Topographical Information (BGT), the Key Register of Addresses and Buildings (BAG), and zoning plans.

The portal is online, which means it can be consulted anytime and anywhere. It is thus a pragmatic and efficient means of communication that can be used for presentations or for providing your stakeholders with transparent information. This enables you to garner broad support for sustainable solutions with added value. The Gebiedsmanagers application enables you to attain your project goals and to innovate.

Contact: Maarten de Hoog I I I 088-1228100




Climate-proofing involves the question as to what degree dangerous weather will impact on social and economic life. To map out climate resilience, it is important to know how dangerous weather will affect your municipality. What can you expect and how can you anticipate the consequences? An important subsequent question: what is the action perspective?

On the basis of their ample experience with dangerous weather and climate change, collaborating partners HydroLogic and Weather Impact offer a unique point of departure for helping you put the right questions. Their expertise enables you to conduct a stress test that is geared to the local situation of your municipality or region. Together, you will map out the main risks and vulnerabilities, and set up a plan to safeguard the municipality’s liveability and safety.

Contact: Matthijs van den Brink I I 06-50636712


hkv (1)


HKV offers a range of climate stress tests and has developed various tools within its own R&D programme that have already been used to conduct a great many analyses. This enables them to provide rapid insights and ensures a lean and mean approach.

Extreme precipitation: HKV has developed waterlogging maps for all the built-up urban areas in the Netherlands, enabling municipalities to conduct an initial estimate of the impact of extreme precipitation. Several extreme downpours have been calculated for each area, based on the new precipitation statistics. These maps are available free of charge through the Water on the Street app (iOS and Android). For more information, see Waterlogging Stress Test.

Drought: HKV is an expert in the impact of extreme drought and the effects of mitigating measures in sectors such as agriculture, nature, shipping, and drinking water. Their analyses focus on both the probability of drought and its impact. For their analyses, they use hydrological and effect models identical to the ones that are used in regional drought studies and the Delta Programme on Freshwater Supply.

Urban flooding: Location-specific information on potential water depths and the probability of urban flooding at the push of a button? Helpful if you would like to know how vulnerable the vital infrastructure in your area is, and to weigh up the costs and benefits of measures. See and the product brochure.

Contact: Teun Terpstra | | | 0320 294242

Imber advies



Your municipality is affected by waterlogging, or you wish to know which areas will be prone to waterlogging in the event of more extreme precipitation in the future? And you wish to prevent rainwater from flooding or damaging houses, businesses, and/or important infrastructure? Imber Advies can conduct a made-to-measure stress test on your behalf. Their work generates transparent maps, highly detailed animations, and thoroughly substantiated recommendations. Dozens of parties working on precipitation-proofing have led the way.

With the stress test, they provide insight into the locations in your municipality (or area) that are prone to waterlogging and what the underlying causes are, now and in the future. To this end, they employ sophisticated software (InfoWorks ICM) and integrated calculation models for sewer systems, surface water, and ground level. On the basis of local expertise/insights and the results of the simulations, Imber Advies develops solutions, together with you, that are geared to the specific situation in your municipality.

Contact: Ferry van den Eng I I I 06-17028782




The Kragten agency will be happy to support you in mapping out your local situation by drawing up vulnerability maps. Kragten uses STRATUS for its high-level hydraulic calculations. STRATUS is their integrated dynamic flow model which enables sewerage, surface water, and surface run-off in both urban and rural areas to be taken into consideration in a single calculation effort. In addition, they will map out areas that are prone to drought and heat. These maps are combined into an integrated, comprehensible climate map for everyone.

This stress test provides a full overview of your vulnerable areas and high-risk objects. It also visualises issues that are not immediately apparent to everyone. For example, that nature close to urban areas is not merely beautiful but also entails risks in terms of, e.g., forest fires. The stress test provides proper insight in these types of situations and enables well-considered choices.

What Kragten deems important with respect to stress tests is that they are expressly used as aids. As far as Kragten is concerned, a stress test constitutes a starting point rather than a final image. A starting point for a collective dialogue, from various disciplines and together with the community. This dialogue must not only focus on the technical interventions required to protect such vulnerable areas and high-risk objects; it also needs to deal with what we together find important. Once we have a clear perception of such matters, we can use this as a basis to collectively make integrated choices. This is what Kragten regards as true spatial adaptation.

Contact: Petra Thijs – Spee I I I 088 33 66 122




Lokinas conducts stress tests by collecting and assessing detailed data on a municipality. For example, for the waterlogging stress tests Lokinas uses detailed data on the sewer system, open water, the terrain situation, and elevations. This provides municipal authorities with a realistic picture of the bottlenecks and effects of measures. Lokinas operates in accordance with the guidelines for standardised stress tests.

Lokinas uses several tools to provide insight into the results of the stress tests. This facilitates communication on the results and encourages users to collaborate more efficiently, for example, in the risk dialogues with stakeholders.

Municipal authorities, finally, can integrate this work environment into the Lokinas digital climate atlas. Thus, they can give the public, businesses, and other governments access to the final results of a stress test. The atlas contains narratives on the effects and bottlenecks of climate change, and on appropriate measures. It helps users to find their way through all the information available.

Contact: Herman Assink │ │ │ 06-22393526




Movares wants to assist municipalities, grid managers, and other asset managers to proceed from Analysis to Ambition and Action. To this end, they have developed the Stress Test Plus. The PLUS in this test is the risk-based approach that is used in an interactive process, together with you, to create insight into the risks that you deem acceptable. After completion of the test, you will have a clear picture of where and why potential measures are advisable, and in what priority. If so desired, a multi-year investment agenda may be provided.

Contact: Mattijs Hehenkamp I I I 00316-23025447

Natuurlijke zaken

Natuurlijke Zaken


Natuurlijke Zaken helps your municipality to develop a natural substantiation and design for public space. Natuurlijke Zaken thus contributes to the elaboration of the stress test and to enhancing your municipality’s climate resilience.

Green-blue structures in the public space play a crucial role in this respect. Greenery and water not only boost climate resilience, they also raise housing values, promote public health, and enhance peoples’ general well-being.

In addition to design, Natuurlijke Zaken is experienced in garnering support and creating shared responsibility for green outdoor spaces. In many projects, we have collaborated with stakeholders such as residents, housing corporations, project developers, and municipal sewer departments. In this respect, they can also provide support.

Contact: Hartger Griffioen I I 06-47168753

Nelen & Schuurmans



Experience has taught us that a map with a detailed visualisation of the impact of climate change is the best way to encourage both internal and external stakeholders to embrace climate adaptation in their operations. That is why more than 50 municipalities (from Amsterdam to Zutphen) and a host of district water boards (HHNK, Delfland, WDOD) have joined forces with Nelen & Schuurmans to conduct stress tests and climate adaptation strategies. Nelen & Schuurmans can conduct stress tests quickly and reliably using the 3Di hydrological model, and present the results in an interactive online climate adaptation atlas.

The climate adaptation atlas quantifies the effects and risks of climate change in great detail. Nelen & Schuurmans confer with the client on which images would be relevant to include in the map. The analyses reveal bottlenecks and opportunities, which are used as the basis for drawing up, together with the client, a targeted plan of approach for climate-proofing a municipality.

Contact: Olga Pleumeekers I I I 06-14 89 18 64




Conducting a stress test marks the start of a spatial adaptation process. Stakeholders collectively discover the urgency of developing measures. This shared sense of urgency constitutes the basis for subsequent steps. That is why ORG-ID focuses, from the very beginning, on ownership of and support for spatial adaptation within your organisation and among your partners.

They support, advise, and assist you: advice in the form of recommendations, e.g., on the parties or departments to be involved, the information that could or should be available, the manner in which available tools could be used; assistance in the form of running a climate workshop, producing map materials, and drawing up a report or administrative memorandum. They frequently collaborate with Hydrologic and GrondRR.

Contact: Roelof Westerhof I I I 06-51064791




PROquint conducts climate adaptation stress tests in collaboration with other agencies. The tests are conducted according to the “Natural Alliance” method, and geared to the physical and social features of the area. They identify exposure and map out vulnerabilities. In conclusion, a follow-up strategy is suggested.

Contact: Hans Olsthoorn I I I 00316-53811584




Keeping our cities liveable and safe in the future requires a proper approach to climate change, urban densification, and water management. This calls for creativity and making the right choices. In addition to visualising the various climate effects (river and coastal flooding, pluvial flooding, drought, and heat), the Climate Stress Test conducted by RHDHV also provides insight into the impact on vital infrastructure and vulnerable objects in the chains. Supplementary to conducting vulnerability scans and stress tests (light), the services comprise the organisation of inspirational sessions and climate workshops, and the development of adaptation strategies and implementation programmes. RHDHV prefers to set down the results of a stress test in a report combined with an atlas.

Contact: Nanco Dolman I I I 00316-52351893


Roelofs picture


Roelofs uses the InfoWorks ICM tool. All sewer system calculations are performed using a fully integrated 1D-2D sewer model. The outcomes of these calculations provide an accurate picture of the risk of waterlogging.

The construction of calculation models, the performance of calculations, and the analysis of calculation results use large quantities of data. Roelofs has developed an ArcGIS viewer to open up this data to its principals. The viewer displays the calculated water depths at ground level, the various subsoils, but also the calculated pressure heads in wells, as well as flow rates and flow current velocities in the pipes and at overflows. Photos and short films on waterlogging may also be incorporated into the viewer.

The viewer and the calculation outcomes constitute the basis for the waterlogging stress test. Adding vulnerable functions to the viewer, such as hospitals, through roads, tunnels, shopping centres, and schools will enable the determination of the level of waterlogging at each location.

Roelofs conducts a risk analysis in the purview of its waterlogging stress test. To this end, downpours are calculated with different repeat times, running up to 100 years. For each repeat time, the severity of waterlogging is subsequently determined, as is the design risk.

Contact: Peter Wonink | | I 0546 67 88 88 |




The Sobolt GreenHeat can be used to conduct the “heat” part of a stress test. This heat island analysis provides a highly accurate picture of the heat islands in a municipality, based on satellite measurements.

Are you planning to pursue a municipal policy to combat the heat island effect? Or are you planning to conduct a risk dialogue and is heat a key issue? Either way, it is important for you to be able to rely on the right information. A GreenHeat analysis provides multiple valuable insights:

  • Heat island outline map, based on satellite measurements;
  • Annual comparison: maps covering 2016, 2017, 2018, and 2019;
  • Comparison with other municipalities;
  • Analysis of vulnerable groups;
  • Vegetation opportunities map to combat the heat island effect.

Contact: Daan Kaptein I I I 06-14930816




Sweco conducts climate scans throughout the country. They assist municipalities and local administrators in preparing for the changing climate by offering technical support and helping them organise collaboration with other parties. The approach follows the basic guidelines of the stress test, but will also address your specific situation and wishes. The process is supported by supporting calculations and the Sweco climate app, if so desired.

Contact: Martijn Steenstra I I I  00316-22371791




Rather than a goal in itself, this stress test is an instrument to give impetus to adaptation at various scale levels and among relevant actors. Tauw has gained years of experience in more than 40 municipalities in garnering internal and external support for climate adaptation using the stress test process. At the client’s request, Tauw will use its own GIS models, Tygron, existing maps, or a combination of these elements.

They offer analyses for a range of issues, in which the vulnerable functions constitute the starting point. The issues involve waterlogging, heat stress, drought stress, flood risks, and a host of related climate effects such as water shortage, soil subsidence, vegetation scanners, and water quality. Attention is focused on cross-domain linkage to the measures to be implemented. The result of the stress test ties in seamlessly with the subsequent steps: drawing up an ambition and adaptation strategy, embedding climate adaptation at the administrative and organisational levels, and drawing up the practical implementation agenda for the municipality.

Contact: Edwin van der Strate I I I 00316-653166613




Tygron supplies software for the fast, transparent, and integrated exploration and coordination of design options. In a realistic 3D environment, government authorities, experts, policy makers, and local residents can plan and experiment with scenarios and area development strategies in an intuitive manner.

The Tyron engine is much faster than regular software. As a client, you will have access to our super computer, enabling you to calculate more than 100x faster than usual at an extremely high resolution: 10,000x higher than usual. You will have automatic access to a host of open data sources, but you may also enter your own data.

The Tygron engine allows you to map out bottlenecks in the purview of the stress test and develop adaptation measures focused on issues such as waterlogging, heat stress, and soil subsidence. You may combine this with other themes that are relevant to area development, such as construction tasking. Tygon works in partnership with consultants. Municipalities and district water boards also support their area processes with Tygron software.

Contact: Florian Witsenburg I I I 070-2060126




Flooded streets, water in crawl spaces, foundations running dry, subsiding ground levels, and heat in the city. Identifiable problems that are gaining in significance due to our changing climate. The Wareco stress test maps out the focus areas in an integrated manner.

Wareco has made its mark with its integrated, practice-oriented, and made-to-measure approach. Each project commences with an exploratory risk scan. Subsequently, we zoom in on high-risk spots with detailed model calculations and a field visit. The many interfaces of urban water, groundwater, buildings, soil, public spatial planning, and greenery warrant interconnected consideration, in order to develop viable and sustainable solutions.

The results of the stress tests are bundled into a single, clear outline map with guidelines for practical decisions by administrators and individual residents. The map is provided in an online viewer or printed in a large format to take outside. This integrated map is the tool enabling practical decisions regarding the (re)development of both public and private space.

Contact: Erik Spronk I I I 06-22858895


stresstest WenR


Wageningen Environmental Research (Alterra) offers expertise and support when drawing up regional stress tests. As the pre-eminent knowledge institute for the green space, WEnR commands all the expertise needed to fully integrate climate change into a system approach. The advantage of such an approach is that problems caused by climate impact are tackled closer to the source, whilst minimising evasion of responsibilities.

The subsoil, or better put, the natural basic system (soil, water, greenery) of cities is decisive for the effectiveness of adaptation strategies. WEnR uses various tools and models to map out the impact of the KNMI'14 scenarios. Collaboration with regional partners bolsters the concentration of strengths, efficiency gain, and coordination within the region. Furthermore, tying in with the regional landscape system on the one hand and local ambitions on the other ensures an integrated approach. WEnR has contributed to the Climate Impact Atlas and the Spatial Adaptation knowledge portal; they have also introduced climate workshops in the Netherlands. They ensure alignment with the development of the standard stress test in order to meet all the requirements stipulated by the Delta Plan on Spatial Adaptation.

Contact: Tim van Hattum I I I 0317-48 34 41




Witteveen+Bos provides climate adaptation stress tests as a product and as a process. The product entails a substantive analysis of an area’s vulnerabilities ensuing from climate change: flood risk management, pluvial flooding, drought, and heat. The Climate Impact Atlas enables you to conduct your own stress test light. Contact Witteveen+Bos to provide any expert assistance or advice. The experts have developed efficient tools that provide you with rapid, tailored, and more reliable insights. Comprehensive interests (vital infrastructure, vulnerable target groups, major risks) call for a thorough area analysis by Witteveen+Bos, entailing an integrated exploration of sustainable solutions. If you opt for a process, they offer you support in going through the steps of the Vulnerability Scan and the Adaptation Planning (as outlined in the Guide), together with you and area-based partners.

Contact: Jaap Klein I I  I 06 - 51450912