Category Archives: News

Spring meeting: Hydrological Extremes (Utrecht)

Theme: Hydrological extremes

Date: April 20th, 2018
Location: Botanical Garden Utrecht University, Budapestlaan 17, 3584 HD Utrecht
Costs: free of charge

Preliminary Program:

09:30 – 10:00         Welcome
10:00 – 10:30         keynote Philip Ward
10:30 – 10:45         Pitches floods
10:45 – 11:00         Coffee/tea
11:00 – 11:30         keynote Henny van Lanen
11:30 – 11:45         Pitches Drought
11:45 – 12:30         Lunch

12:30 – 13:00         Travel to KNMI

13:00 – 13:10         Welcome – Patrick van den Hoek
13:10 – 13:30         Introduction KNMI – Patrick van den Hoek
13:30 – 13:50         KNMI climate scenarios – Janette Bessembinder
13:50 – 14:20         Precipitation scaling – Geert Lenderink
14:20 – 14:50         New insights in sea level rise – Sybren Drijfhout
15:00 – 15:30         Excursion: Measurement field – Corné Oudshoorn
15:30 – 16:00         Excursion: Weather room / 3D

16:00 Drinks and snacks

Lecture by Birdsdall-Dreiss Award winner: Ed Harvey

Friday June 30th, Ed Harvey will give a lecture at UNESCO-IHE, Delft (start 16:00h). Ed Harvey is the 2017 Birdsdall-Dreiss Award winner. Further information about Ed Harvey and the award can be found here.

When – Friday 30 June 
16:00 – Birdsall-Dreiss Distinguished Lecture
17:00 – Reception

Where – IHE Delft Institute for Water Education, Westvest 7, 2611 AX Delft The Netherlands (Google Map)

The Birdsall-Dreiss Lectureship began in 1978, as part of a bequest left to the Geological Society of America – Hydrogeology Division.  The bequest is used to provide travel funds for outstanding scientists working in the field of hydrogeology to visit other institutions and give talks on their research.

About the Lecture – On August 25, 1916, President Woodrow Wilson signed the act creating the National Park Service, a new bureau in the Department of the Interior. This “Organic Act” directed the Park Service “to conserve the scenery and the natural and historic objects and the wild life therein and to provide for the enjoyment of the same in such manner and by such means as will leave them unimpaired for the enjoyment of future generations.” This conservation, enjoyment and protection mandate also applies to water resources within parks.

 Unlike most park resources, that are located largely within park boundaries, or are completely under the management control of the National Park Service, park water resource issues and management often involve greater challenges. These challenges arise from the fact that surface water and aquifer boundaries often extend beyond park boundaries and because the legal authority to allocate and manage water resources typically resides with the states. Thus, parks often need to consider resource issues at a larger landscape, or seascape scale, and manage collaboratively with neighbors and partners to protect, manage and restore water resources. In addition, water resource expertise is not always available within a park, resulting in the need to partner with other agencies, universities, friends groups, or regional and national offices. Lastly, many park water resource issues have broader legal, political, socioeconomic, and cultural implications requiring park managers to consider more than just the science alone when making a water resource management decision. 

The lecture, using a series of examples from various parks across the United States, will explore the process of how parks identify water resource needs, issues and concerns, and how they develop and apply the necessary scientific information needed to make water resource management decisions. Specific challenges to decision making and park water resource management will be presented and explored including trans-boundary issues, partnership building, scientific uncertainty, funding and personnel/expertise, and making science-based decisions that also appropriately consider the legal, political, socioeconomic, and cultural impacts of the decision. As part of the visit, the lecturer will also present future water resource research and management needs in parks and across the nation, present information about engaging in water resources research within parks, and advise students on programs for seasonal and permanent employment as a water resource professional within the National Park Service.


Boussinesq Lecture 2017

Date: Thursday, October 26, 2017, 10.00 – 18.00 h
Speaker: Chris Kummerow, Colorado State University, USA
Location: Science Center Delft, Delft, The Netherlands
Subject: Precipitation
Other speakers: Ruud van der Ent (Utrecht University) and Aart Overeem (KNMI)


10.00 – 12:15 Short presentations by PhD-students

10:00-10:15 Camille le Coz (TU Delft): “An overview of rainfall products over Africa”
10:15-10:30 Jeewanthi Sirisena (IHE): “Comparison of four precipitation products for hydrological simulation in the Irrawaddy Basin in Myanmar”
10:30-10:45 Kingsley Kumah (ITC)
10:45-11:00 Lotte de Vos (WUR): “High resolution urban rainfall monitoring by opportunistic sensing”
11:00-11:15 Coleen Carranza (WUR): “Using lagged dependence to identify (de)coupled surface and subsurface soil moisture values”
11:15-11:30 Pleun Bonekamp (UU): “The impact of spatial resolution on resolving spatial precipitation patterns in complex terrain”
11:30-11:45 Thomas Janssen (VUA):”Improving the representation of Amazon forest drought responses in land surface models”
11:45-12:00 Laurene Bouaziz (TUD): “Rainfall-runoff modelling of the Meuse catchment”

12.15 Lunch for PhD event attendees

13.30 Introduction by chairman
13.40 Chris Kummerow (Colorado State University): “Global precipitation – the successes and shortcomings at different space and time resolutions”
14.40 Coffee break
15.00 Ruud van der Ent (Utrecht University): “Origin and residence times of precipitation, and why that matters in hydrology”
15.45 Aart Overeem (KNMI): “Towards operational rainfall monitoring with microwave links from cellular telecommunication networks”
16.30 Closure and drinks


Ruud Schotting wins 2016 STW Open Mind award

Professor Ruud Schotting (Utrecht University) has won one the five 2016 STW Open Mind awards for his idea ‘Towards drought preparedness: How simple can it be?’ Fifteen short-listed ideas from all technological fields competed for the awards of 50,000 euro each to realize a prototype of the proposed idea.

More information about the STW Open Mind award and the about the idea of Ruud can be found on the website of STW.

Boussinesq Summer Event 2016: Amsterdam

On Friday July 8 the Boussinesq Spring/Summer event was held at the Vrije Universiteit Amsterdam. During the morning session exciting talks by Hugo de Boer (carbon and water fluxes by plants), Josh Dean (carbon in rivers) and Monique Heijmans (carbon in peat soils) set the stage for an inspiring day on the theme Water and Carbon with 29 participants.

After lunch we departed to the Ilperveld. Here we boarded for a 2 hour boat trip through this amazing peatland complex. Michel Hensens guided us through the history of the region. Surprisingly, the now scenic wetlands appeared to have a long history as waste dumpsite of the city of Amsterdam, including being a dump site for hospitals up to the late 1950s. Michel explained how this pollution, which is still in the ground, is being managed and how this improved the botanical and water quality of the area during the last decades.

Halfway the tour, we met up with Ko van Huissteden. Ko explained what equipment he and his research group use in the Ilperveld to measure carbon fluxes coming from peat in order to establish if this site is a net source or sink of green house gases. At 5 o’clock we were back at the Vrije Universiteit, nicely in time to finish the day with well-deserved drinks and snacks.


Martijn Westhoff, Ype van der Velde and Margreet van Marle


09:30 doors open
10:00 Hugo de Boer (UU): Plants: the green pumps in the terrestrial hydrological cycle
10:45 Josh Dean (VU): Terrestrial carbon cycling and the role of the “aquatic pathway”
11:30 Coffee break
11:45 Monique Heijmans (WUR): Water and carbon and (peat) mosses
12:30 Lunch
13:00 Departure to Ilperveld
~16:30 Leave Ilperveld, back to Vrije Universiteit

50th anniversary symposium “State of the art measurements of catchment-scale hydrological processes”

On the occasion of the 50th anniversary of the Hydrology and Quantitative Water Management Group at Wageningen University and the 50th anniversary of the Hupsel Brook experimental Catchment, we organize a scientific symposium with the theme “State of the art measurements of catchment-scale hydrological processes” on Thursday 10 September. The symposium is organized within the framework of the Euromediterranean Network of Experimental and Representative Basins (ERB), the Netherlands Hydrological Association (NHV) and the Boussinesq Center for Hydrology.

The symposium will consist of five sessions, covering five main themes: precipitation, evaporation, soil moisture, groundwater and discharge, with special focus on closing water budgets. Each session will contain an international keynote and two invited speakers from (near) the Netherlands.

In addition, there will be a (Dutch) symposium and reunion on Friday 11 September, highlighting 50 years of research and education in the Hupsel Brook catchment and at the Hydrology and Quantitative Water Management Group.

When: Thursday 10 September 2015 (English symposium) and/or Friday 11 September 2015 (Dutch symposium + reunion)
Where: Campus Wageningen University
Cost: None
Registration: Email before 15 August to
Information: and flyer

We look forward to welcoming you in Wageningen on September 10th and 11th, 2015.

The organizing committee,

Remko Uijlenhoet, Tjitske Geertsema, Piet Warmerdam, Han Stricker and Claudia Brauer

Boussinesq Summer Event 2015

On Wednesday August 26th the second Boussinesq Spring event was held in Delft. Twenty three participants enjoyed the lectures of Nick van de Giesen, Pieter Stuyfzand, and Ype van de Velde on the theme “Towards long-term hydrological sites?”. After lunch, we made a walk, via the Boussinesqweg, to the laboratories of Deltares. After some coffee we got a tour through the immense hydraulic lab, the geotechnical lab, and a glimpse on the brand new ‘Delta-goot’. The BBQ was canceled due to the hydrological weather, so the day was ended with drinks and indoor pizzas.

Some impressions of the excursion:2015-08-26 14.28.302015-08-26 14.41.482015-08-26 15.16.082015-08-26 15.58.05

Theme “Towards long-term hydrological sites?”
Date: Wednesday August 26th, 2015
Location: PSOR cafe (ground floor, south side), Faculty of Civil Engineering, TU Delft
Costs: none

09:30-10:00 Coffee and tea
10:00-10:45 Prof. Nick van de Giesen (TUD): TAHMO-project
10:45-11:00 Pitches (3)
11:00-11:30 Break
11:30-12:00 Prof. Pieter Stuyfzand (KWR): Lysimeter site Castricum
12:00-12:20 Dr. Ype van de Velde (WUR): Hupselse Beek
12:20-12:35 Pitches (3)

12:35-13:30 Lunch

13:30-16:30 Excursion to labs of Deltares (by foot)
16:30-18:00 Drinks

18:00 BBQ (a small contribution will be asked)

NHV bestaat 25 jaar

Op 11 juni vieren we dat de Nederlandse Hydrologische Vereniging 25 jaar bestaat. Ook bestaat het lijfblad Stromingen 20 jaar.

Daarom organiseert de NHV een feestelijke bijeenkomst met een interessant programma over verdamping. Meer info.

Daar de NHV website momenteel vervangen wordt kunt u zich aanmelden via het secretariaat van de unit Bodem en Grondwatersystemen van Deltares: Graag onder vermelding van “Aanmelding NHV” in het onderwerp.

U dient de volgende gegevens te vermelden in de aanmeldingsmail:

  • naam
  • nhv lid ja/nee
  • factuuradres
  • onderdeel waar u zich voor wilt aanmelden

1st Boussinesq Spring meeting 2014

(by Lieke Melsen)


On Monday the 7th of April the first Boussinesq Spring meeting took place. Especially organised for young and early-career scientist, but of course everyone with a scientific background in hydrology was welcome. The meeting, held at Wageningen University, started off with an interesting presentation from Bob Sue (ITC) on land surface fluxes. After the key note the first pitch round started, with only 2 minutes per presentation. The pitch round was a perfect opportunity for all participants to present their current research, ask for advice, shameless advertise the EGU poster or talk, or just to drop an idea. There was a large variety in the talks and the response of the public on the pitch-concept was exclusively positive. There were just some people that had difficulties with sticking to the two-minutes limit…


2014-04-07 14.55.25

After a long break with coffee, tea, and chocolate-eggs for the spring feeling, the morning continued with a presentation from Miriam Coenders on a novel method to estimate surface fluxes and a presentation from Bram te Brake on the use of satellite data to identify clay swelling and shrinkage. Again, this part of the day was closed with a 2-minutes-pitch round.

After three presentations and sixteen pitches, it was definitely time for a good lunch. On long tables we enjoyedthe soup, the muffins, the sandwiches and the fresh fruit, to gain some energy again for the afternoon excursion.

For the excursion, a visit to the Speulderbos-site was planned. After a bus trip and a nice walk through one of the oldest forests of the Netherlands, we reached the measurement site and the flux tower. It was a pity that RIVM had just decided two months earlier to remove most of the measurement equipment, but with some fantasy we could imagine the equipment on the tower ourselves. And of course, there was still the possibility to go to the top of the tower! Some sportive people chose to go up in the tower with the stairs, but also the comfortable option (the elevator) was used to enjoy the view on top of the tower. We were lucky with the nice weather and the views were stunning! The whole program of the day was in the end slightly delayed and therefore we had to skip the afternoon discussions, but of course there was plenty of time for an informal drink to have a chat with all the attendees. The goal of this day, to meet some colleague-scientists and to exchange ideas, was definitely achieved!




Morning program:
09:30 Walk in/coffee
10:00 Bob Su keynote
10:45 Pitches
11:00 Break
11:30 Miriam Coenders (TUD): ‘Measuring evaporation and transpiration rates with DTS’
11:50 Bram te Brake (WUR): ‘In situ and InSAR estimations of changes in clay soil water content’
12:10 Pitches

Afternoon program:
12:30 Lunch
13:30 Visit to field site
16:00 Discussion with drinks
17:00 More drinks