Smartphones indispensable tools for flood abatement

Flood events in Kumasi, the second biggest and fastest growing city in Ghana, are becoming more frequent and severe due to changes in the climate and rapid urbanization growth. The natural flood plains are increasingly being used for urban construction. Increasing population also brings along more solid (plastic) waste on the streets and into the […]

Improper waste management as a major cause of flooding, and how to fix it

Driven by an expanding population following rapid urbanization, global waste generation is growing at a fast pace with plastic waste being a problematic aspect. The growing use of plastic as an essential resource has caused many environmental problems. Not only are the seas being contaminated, but cities are also facing big problems. In the city […]

TWIGA management, a look behind the scenes

The TWIGA project started over a year ago when all TWIGA partners signed a Grant Agreement with the European Commission, consisting of a description of the action and legal parts. If TWIGA were a restaurant, the Grant Agreement basically is our promised menu (including a lot of terms at the back). In our previous TWIGA […]

From “nice idea” to “actionable information

An important output of the TWIGA project will be new geo-services (twenty!) based on the application of innovative sensors. In order to speed up the development of these services, a Hackathon was organized from 19 through 23 November 2018 at the Kwame Nkrumah University of Science and Technology in Kumasi Ghana. The objective was to […]

Open Data Cube and Deep Learning to Exploit Earth Observation Data Precipitation

In this video, Mónica Estébanez Camarena, Ph.D. candidate at TU Delft, talks about the Schools and Satellites (SaS) project (, in which she has been working since 2019. The project was born as a collaboration between TU Delft, TAHMO, PULSAQUA, Smartphones4Water, and the Ghana Meteorological Agency (GMet). SaS is one of the pilot projects of […]

How hot is the soil?

The Surface Energy Budget While the sun is beating down on the Earth’s surface, it is generating fluxes of energy that play an important role in determining our weather and climate. In a way, it functions as a gigantic solar panel that absorbs solar radiation. The absorbed energy can be either emitted back to the […]

Getting location right: from meter to cm positioning accuracy

Prototyping a low-cost continuous GNSS monitoring network for positioning and atmospheric purposes in Ghana Imagine you bought a plot of land and need to map the exact boundaries. However, your positioning device (often referred to as GPS) can only measure up to several meters of accuracy unless you rent a very expensive positioning instrument. This […]

Field work alternatives during COVID 19

Towards the end of 2019, a good number of students at TU Delft were eager to travel to Africa for TWIGA field work in what we call Q4 (4th quarter, April-June). Unfortunately, as we all know, COVID-19 intervened and made travel all but impossible until now. We had to come up with alternatives to pursue […]