“Water is the driving force of all nature.”
— Leonardo da Vinci

Water is life

Water shapes the future of our cities, communities and environment.

At YonSen Group, we value water projects as an opportunity to create resilient infrastructure, reduce climate risk and support more sustainable and regenerative development for people and nature.


We bring many years of international project experience, but like water, we are always moving forward — adapting, learning and developing new ways to solve each client’s specific challenges.

Hydrology & Flood Risk Assessment

We assist with understanding water systems, catchments, rainfall patterns and flood risks. This includes analysis of extreme rainfall, runoff, river flooding, coastal interactions and urban flood pathways.

Typical support includes:

  • Catchment and runoff analysis
  • Flood risk screening and mapping
  • Rainfall and design storm assessment
  • Climate change impact assessment
  • Hydraulic boundary conditions
  • Flood mitigation planning
  • GIS-based analysis and mapping

Urban Drainage & Stormwater Management

We support the planning and design of urban drainage systems that are prepared for both daily operation and future climate conditions.

This can include:

  • Stormwater drainage layouts
  • Pipe network planning
  • Detention and retention systems
  • Pumping station concepts
  • Culvert and channel assessments
  • Cloudburst and extreme rainfall strategies
  • Sustainable drainage solutions

Hydraulic Modelling & Simulation

Our team and trusted partners bring experience with hydraulic and hydrological modelling tools used for planning, design and decision-making.

Typical support includes:

  • 1D and 2D flood modelling
  • River and drainage network modelling
  • Model calibration
  • Urban flood simulations
  • Scenario testing
  • Model review and quality assurance
  • Result interpretation and visualisation and runoff analysis

Relevant software experience includes tools such as HEC-RAS, SWMM, MIKE, SewerGEMS, GIS platforms and CAD-based workflows.

Nature-Based Solutions

We believe that future water projects should do more than simply move water away. Well-planned solutions can reduce flood risk, improve urban environments, restore natural systems and create social value.

We support the integration of:

  • Nature-based solutions
  • Blue-green infrastructure
  • Wetlands and retention landscapes
  • Sponge city principles
  • Regenerative water management
  • Local environmental improvements
  • Solutions that support biodiversity and community value

Our vision is to contribute to water projects that create a positive footprint — for people, cities and nature.

WWF’s inspiring video highlights how rivers can support people, nature and climate resilience in urban areas.
At YonSen Group, we help develop similar ambitions into practical water projects through hydrology, flood risk assessment, drainage planning, hydraulic modelling and nature-based solution concepts. Our goal is to support resilient infrastructure that protects communities, strengthens biodiversity and creates greater value for people and the environment.

BBC’s video highlights how Copenhagen is preparing for extreme cloudbursts by combining flood protection with multifunctional urban spaces and nature-based solutions.
At YonSen Group, we possess Danish expertise in developing similar climate-resilient water solutions — from small local drainage challenges to large-scale flood mitigation and urban adaptation projects. We support clients with hydrology, hydraulic modelling, drainage planning and practical nature-based concepts that create value for both communities and the environment.

See our video: