Through its independent citizen science research and consultancy PULSAQUA helps build a sustainable world, leading the field when it comes to water-related environmental problems where society is involved. With our citizen science and water management expertise, we help government agencies, NGOs and industries achieve structural change by working together with society.

PULSAQUA advises on citizen science (CS) use, creates CS (monitoring) projects, and delivers environmental impact assessments together with citizen scientists. We help NGO’s, government agencies, and industries to track and monitor specific desired changes that society needs to go through, together with that same society.  For information about our current and previous projects and deliverables, please have a look at the Portfolio page.

Our General Terms and Conditions are applicable on all our offers, quotations, and agreements.

What is in a name

As you might understand, the name PULSAQUA refers to momentum or so-called impulsive force, which is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction in three-dimensional space. If m is an object’s mass and v is the velocity (also a vector), then the momentum is

P = M x V

To induce an impulsive force on water, we just multiply input of many citizen scientists (creating a big mass) with a well-directed velocity (work done by PULSAQUA and finance from clients).

Therefore, a warm welcome to all (future) citizen scientists and clients, together we will be able to bring momentum and change.


A world where people and companies are aware of their own actions and the effect of those actions on their fresh- and saline water environment, in that way achieving the (water-related) Sustainable Development Goals.


To induce an impulsive force on water issues and awareness concerning these issues by advising, creating, and investigating via Citizen Science.


By 2025, start seeing effects on the behavior of people, policies, and companies towards a sustainable future.

Sandra de Vries


In January 2019 I founded PULSAQUA. I am a Water Management engineer, experienced in project set-up and management, citizen science research methods, and connecting science to policy and people. I aim to work with people interested to reach a certain goal, using citizen science methods. I do this in a creative way, not immediately taking the obvious and straightforward route, resulting in surprising and upbeat projects. I hold a guest-researcher position at the Delft University of Technology

Topics of knowledge include:

  • Water-related sustainable development goals (SDG) monitoring
  • Fieldwork for hydrology purposes
  • Green Infrastructure in the urban environment
  • Environmental problems related to water management
    • Plastic waste in the fresh-water system
    • Groundwater over-abstraction
  • Open Science
  • Data analysis and interoperability
  • And of course, citizen science

Jesse Kamstra

Society and Sustainability Specialist

Since January 2022 I am part of the PULSAQUA team. With a background in sustainable business, I am interested in the role of organizations in addressing pressing societal and environmental challenges. In my role of Society & Sustainability Specialist at PULSAQUA I am helping organizations to use and implement citizen science into their projects. Since citizens are directly affected by many (water-related) issues, it is only logical to involve them in the creation of solutions for these issues. 

Topics of knowledge include:

  • Sustainable business model & SDG implementation
  • Stakeholder analysis and management
  • Qualitative and quantitative data collection and analysis
  • Cross-sector collaboration

Jordy Janssen

Intern Impact analysis 

From January till June, I did an internship at PULSAQUA for my master's in Biology and Science Communication at Leiden University. Although I am more used to doing research in the natural sciences, this internship was the practical conclusion of my recent orientation towards the more social aspects of science, such as citizen science.

During my internship, I focused at the outcomes that people experienced as a result of participating in the Delft Measures Rain Project. The main goals was determining what these citizens gained from participating in this project. My findings contributed to making citizen science projects more beneficial and valuable for both science & society. 

In September 2022, I returned to PULSAQUA to work on papers that are related to my thesis research.


Thijs van Dijk

Intern Product Design

In September 2022, I started my graduation internship at PULSAQUA. As I am finalizing my studies of Industrial Product Design, I want to put the skills that I learned during my studies into practice by developing a new product that collects water-quality related data. One of the main challenges of the product that I want to design is that it needs to be very accessible and easily understandable on the one hand, but that it also needs to collect and measure data that is usable and valuable for deeper analysis.

I believe that product design is a powerful tool to have a significant impact on people, but just as much on nature itself. For me, the creative freedom and dealing with a project’s unpredictability are the most beautiful aspects of designing. In this internship, I will be challenged to convert the many ideas that I have for a product into a useful and tangible product.

Topics of knowledge include:

  • Product design (idea to shelf)
  • Prototyping
  • Human-centered design
  • Creative problem solving
  • Creative thinking

Anita Milisav

Intern Storytelling & Social Media

In February 2023 I joined the PUSLAQUA team as part of the finalization of my MSc studies in Bio-pharmaceutical sciences and communication (Leiden University). Coming from the field of natural sciences, where I spent most of my time in the lab, I am very excited to step out of the research bubble and combine my background knowledge with the more social aspect of science during my 6-month internship here.

As a science communicator, I am passionate about making science available to everyone, which aligns very well with the idea of citizen science where anyone can make a contribution and do something with their passion for the environment. During my internship, I will focus on optimizing  certain tools that PULSAQUA uses for the Science Citizens platform. I will be involved in the promotion of this platform. In this way, I want to help provide the public with easy access to the handles PULSAQUA offers to help them start their own citizen science journeys.

Topics of knowledge;

  • Chemistry
  • Biology
  • Creative writing
  • Literature research


Are you interested in learning more?
Contact us today!
We will get back to you as soon as we can!
Our General Terms and Conditions are applicable on all our offers, quotations and agreements.

Blue City Building, Maasboulevard 100,
3063NS Rotterdam, The Netherlands

+31 6 22413966