What do we offer?

We strengthen

The resilience of cities to floods and climate change.

We efficiently manage

Flow rates, volumes and quality of runoff with Sustainable Drainage Systems (SuDS).

We create

And improve the urban habitat with multifunctional spaces that promote biodiversity and recreation.

We empower

The efficient use of water resources and respect for the environment.

We add value

Using advanced hydrological-hydraulic modelling design tools.


What we do?

Green Blue Management is a pioneer company in the implementation of Sustainable Drainage Systems (SuDS) in Spain. We have been developing innovative solutions in rainwater management for almost two decades, and we have been responsible for the drafting of the first SuDS design guides published in Spain.

At GBM we provide technical assistance throughout the life cycle of SuDS, from the planning and strategy phase, to their maintenance, through all the design and project phases. We are specialists in hydrological-hydraulic modelling, using specialised and advanced software, compatible with BIM. At GBM we have designed numerous drainage systems, combining SuDS techniques with conventional systems, and in regions with very different climates.

Our main services are encompassed in three main areas:



SuDS provide a TRIPLE BENEFIT by being advantageous to the economy, the environment and communities.

Sustainable Drainage Systems (SuDS) take advantage of the properties of the soil.

SuDS are Nature-Vased Solutions (NBS) for the smart management of rainwater collecting and treating the water where the rain drops: roofs, squares, streets, roads, etc.

The SuDS enable a transition towards a circular economy in the city, by restoring its drainage capacity and closing the water cycle with a wide range of techniques such as rain gardens, permeable pavements, infiltration-attenuation basins, harvesting systems, among others.

SuDS substantially reduce the total amount of water discharged to sewers or watercourses.

This way, SuDS constitute a strategy for adaptation to climate change in the urban environment, by increasing the resilience of drainage systems to cope with extreme weather events, and reducing the risks from flooding and drought.

Moreover, SuDS improve the quality of the urban landscape, providing natural habitats for fauna and flora, as well as spaces for coexistence within the city. In addition, they enhance the improvement of the state of water bodies.

The sustainable drainage concept implies the increase in permeable and green surfaces, which can reduce the urban “heat island” effect that occurs in cities.

SuDS intervention can include informative boards which are a useful tool for educational and communication purposes.


The Sustainable Development Goals are made up of 17 specific objectives of universal application that have been proposed by the United Nations to direct efforts to comply with the 2030 Agenda.

Water is a scarce good and an essential support for life and therefore several of the SDGs focus on improving the management of water resources and improving the quality of water bodies. It is at this point where the SuDS can contribute in a very important way to the achievement of these objectives by:

  • Improving the quality of water bodies
  • Protection against floods and droughts
  • Adaptation to climate change

The green areas associated with SuDS improve the quality of the air and therefore, people’s health in general.

SuDS absorb pollutants from the water and efficiently attenuate runoff, improving the quality of water discharged into the natural environment.

In addition to improving the hydrological behaviour of cities, SuDS contribute to creating attractive urban environments and improving the energy efficiency of buildings.

SuDS help to alleviate stormwater flooding in cities and improve their resilience to climate change.

By improving the quality of the water discharged, SuDS contribute to improving underwater life and limiting nutrients discharged to the sea.

The green areas associated with the SuDS promote the creation of new habitats and ecosystems.

The SuDS require a change in urban mentality that involves several stakeholders, both public and private.

Years of experience in sustainable drainage
Studies and projects carried out
Public and private clients
Presentations at conferences and congresses
Specialized courses taught
European projects carried out
Technical publications