2019 Japan flood reports are published

The reports of levee failures, etc. in 2019 Typhoon Hagibis is published in English by the Japanese Geotechnical Society. The reports are open access.
https://www.sciencedirect.com/journal/soils-and-foundations/vol/61/issue/2#article-22
Including, “Levee damage and bridge scour by 2019 typhoon Hagibis in Kanto Region, Japan”
https://www.sciencedirect.com/science/article/pii/S0038080621000226

Backslope erosion by overtopping at the Naka River levee (Photo : Hirotoshi Mori)

A WG webinar on animal activity on levees

We are very pleased to announce the first webinar of the Working Group on Levees and Flood Defences of the European Club of ICOLD, about animal activity on our levees, which will be held June 30th from 11:00 to 12:30 CET. Please email Patrik if you want to attend. He will send you an appointment which you can also forward to any others you think would be interested.  Three presenters will be given the floor to share experiences and expertise with respect to prevention, detection, assessing severity, repairing, regulation and any other issue related to animal activity challenging the integrity of levees, in particular from the levee managers’ point of view. After these presentations, a large part of the session will be devoted to discussion and further exchanges between all of the participants.

Please email  Adrian/Patrik/Rémy by Friday 4 June

  1. If you would like to be a presenter for the 30 June webinar. Presentations will be up to 15 minutes long. Depending on the number of responses we may have to select who will be a speaker.
  2. We are considering organising a second knowledge sharing session in autumn of this year. Let us know what topics you would like to hear about it.

Adrian Rushworth

Patrik Peeters

Rémy Tourment

Photo source and copyright : https://commons.wikimedia.org/wiki/File:Badger-badger.jpg

Special session in the FLOODrisk conference on risk based decision making for levees

During the FLOODrisk 2020 conference (happening in June 2021) , a special session  ‘Risk Informed Decision Making for Levees and Flood Defences’ will take place virtually on Tuesday 22 June 2021 from 13:30 to 15:00. This special session is organised by EUCOLD LFD WG and ICOLD TC members.

Special Session: Risk Informed Decision Making for Levees and Flood Defences

For more information visit the Special Session Hub. To access this page, you will need to be registered online. If you haven’t done so yet, tou need to  Register Now Here.

Grass roots

Very interesting post in Linkedin about grass roots, which shows we still have a lt to learn on this topic :  link

Discovery of ancient levee in the Netherlands

Near the town of Vlaardingen, remnants have been found of an ancient construction that probably served as a low levee. The construction was about 1 metre in height, at least 20 metres long, and consisted of a dual construction consisting of wooden piles and braided willow branches, that was subsequently filled with earth.

The levee was probably constructed over 2000 years ago, during the 2nd century BC. As such, it is probably the most ancient levee discovered so far in the Netherlands.

 

See https://nos.nl/artikel/2373863-mogelijk-oudste-dijkje-van-nederland-ontdekt-in-vlaardingen.html  for some pictures.

FLOODrisk conference

The FLOODrisk international conference on Food Risk management, postponed from 2020, is now scheduled from 21st to 25th June 2021 online. You can find all details here: https://floodrisk2020.net/news/floodrisk2020-virtual-conference-information/ 

Registration is open.

EGU virtual conference – Submissions deadline January 20th.

I received from a colleague  this information that I wanted to share with you:

DO NOT FORGET THAT… Is that time of the year were we get crazy and excited about submitting abstracts for EGU ! Deadline for abstract submission is extended to the 20th of January 2021, 13:00 CET. This 2021 promises an even more exciting event as we started our session on “Advances in modelling, failure assessment and monitoring of levees and other flood defences”. We want to start this session as a tradition for dikes and other flood defences practioners and researchers to have the opportunity to meet in a yearly basis and share our findings and relate to other world known flood risk experts. Please submit your abstract and contribute to the start of this hopefully yearly tradition for flood risk and flood resilience enthusiasts.  Please feel free to forward the invitation to any dike enthusiast who you think may be interested either in submitting something or attending to the session. Looking forward to your abstract submission !

In situ overflowing experiments at Living Lab Hedwige-Prosperpolder by POLDER2C’s

POLDER2C’s has started with the execution of levee overflow tests near the Dutch-Belgian border. Besides well-maintained levee sections, we aim to test anomalies like presence of a cliff, animal burrows and a tree.

https://www.vrt.be/vrtnws/nl/2020/11/13/dijken-doel/

https://polder2cs.eu/

Patrik Peeters
Flanders Hydraulics Research

Presentation of the French version of the ILH

The French association of levee managers France Digues organises a presentation of the French edition of the International Levee Handbook. Because of the COVID19 situation, this event, which was supposed to happen in Paris as a physical meeting, will beheld online so more people will potentially be able to attend. More details here : Programme de la matinée JT Guide ILH  and inscriptions here : Formulaire d’inscription

Reflections on the ICOLD LE TC meeting September 2020

The ICOLD Levees Technical Committee (LE TC) 2020 met over the last three days of September for our 2020 meeting. These are some of my personal reflections.

The current restrictions in response to COVID19 were overcome by having a teleconference on each of the days. I think the importance of Levees worldwide was seen by the range of countries that joined the meeting despite the large time differences for some. We were also pleased to Welcome Michael Rogers, the current President of ICOLD, to one of our meetings. Each day had a different theme.

Day 1: On the Monday we considered the Levees situation report. The report is well developed containing information, including a section with detailed information about levees within many countries. The version of the Levee Situation Report tabled at the meeting was approved.

Day 2: The focus for Tuesday was the dams-levees comparison report. Chapter include design, construction and inspections. Draft chapters were considered with feedback for the authors. The report is developing into a useful source and signpost for information and will help learning across dam and levee practitioners.

Day 3: The Wednesday meeting considered general topics. I particularly noted the importance of effective national backing groups to support TC members as the reports are nearing completion. It was also an opportunity for suggestions for future bulletins.

I was again impressed by the importance of levees across the world combined with the knowledge and enthusiasm of those managing them.

Adrian Rushworth

Webinar on International Levee Databases

Last week TU Delft hosted a webinar on their International Levee Performance Database, as well as similar initiatives from France and the USA. The webinar also discussed the applications of such databases and the necessity for closer collaboration in developing them.

Over 150 participants joined online from around the world, representing private consultancies, academic and research institutes and local and national authorities.

A recording of the event can be found through the below link, as well as links to videos on the use of the ILPD;

Webinar:                                                                                                         https://www.youtube.com/watch?v=lVSmvdaCVCE
ILPD in general:                                                                                           https://youtu.be/p4B6biRk0EM
Assessment and design (In Dutch,with English subtitles)  https://youtu.be/3wQk77_vuiU
Crisis management:                                                                                   https://youtu.be/eecNYsiJh6k
Data Science:                                                                                                 https://youtu.be/k2_IcEISeWA

We hope to continue this initiative, and welcome any comments or suggestions through our email: leveefailures@tudelft.nl.

I.S. Rivers conference

The 4th International Conference  IS. Rivers will take place from June 21 to 25, 2021.
I.S.Rivers is an international conference focused on research and action in the service of large rivers in Europe and the world, a meeting between scientists and practitioners.
The French National Dams Committee CFBR is a partner of this event. More details here : http://www.graie.org/ISRivers/a_index.php

SafeLevee webinar on failure databases

Dear colleagues,

Over the last 5 years the SAFElevee project team at TU Delft has investigated levee failures and has set up an open-access database (the international levee performance database – ILPD) with over 1500 levee failure and performance cases.

You are warmly invited to attend a webinar on the SafeLevee project and ILPD database.
The event will be held on Friday 25th September from 13.30 – 15.30 CEST, and the program outline is as follows (further details will be made available at a later stage).

Block 1: SAFElevee, the international levee performance database and its use for levee managers

  • Introduction to the program, SAFElevee project and International Levee Performance Database
  • The use of levee performance information for levee managers (design, crisis management etc.) – 4 short videos on this theme have been prepared by HKV consultants and will be shown
  • Open discussion on use by levee managers with contributions from Rijkswaterstaat and other levee managers and participants.

 

Block 2: International collaboration in collecting, sharing and analysing levee failures

  • Short Introduction (Bas Jonkman, TU Delft)
  • Presentations by other similar database initiatives (EDF, France and others)
  • Panel and open discussion on future use and sharing of levee failure and performance data

Please confirm your attendance by emailing leveefailures@tudelft.nl, and feel free to share with others you think may be interested. More details will be provided to attendees prior to the event, including a detailed agenda and access details.

Free ICFM webinar on flood events China, JP, USA (26 Aug)

Under the title “The Flood Challenge to Resilience” ICFM will share the experience with (i) major flooding in China that affected/s millions of people and hundreds of river basins; (ii)  flooding in Japan caused by truly extraordinary amounts of rain falling over the island of Kyushu; and (iii) flooding in Michigan (US) that interacted with aging infrastructure and resulted in failure of two dams.

Three highly regarded speakers – Professor Jun XIA, Professor Toshio KOIKE and Dr. Molly FINSTER –  will introduce these topics and set the stage for the discussion by the audience. See the webinar invitation/registration page at www.icfm.world/Webinars.

Building a resilient flood protection system, including to overtopping. Summer 2019: creating openings in an existing railway

History of the project

On the left bank of the south of the Rhône river (in France), between the cities of Tarascon and Arles, a railway embankment has performed for many years as a flood protection structure although it was not a role falling under its owner (the French National Railway company) responsibility. In December 2003, because of breaches in appurtenant embankments, the north of the city of Arles was flooded for many weeks.

Fig. 1: breaches on appurtenant embankments in 2003

In the aftermath of this centennial flood, the State and local authorities have put in place a vast flood prevention plan at the scale of the catchment area, called Plan Rhône, which notably provides for the complete renovation of the levees of the Rhône Delta over 20 years. Among this ambitious program, was decided the creation of a levee resistant to overtopping up to the 100 year flood, parallel to the railway embankment, and the creation of 10 openings (concrete structures) in the railway in order for it to be “hydraulically transparent” (see Fig. 2). This segment of levee and the reinforcement of the rest of the system against all other deterioration and failure mechanisms allows the whole levee system to withstand floods up to the 1000 year with a 50 cm margin (the crest level of the levees not-resistant to overtopping). Floods above the protection level (100 year) will flood the protected area in a controlled way and with many times less water volume and speed than any previous scenario with the same probability (see Fig. 3). A second line levee will prevent the flood going over the new levee to reach the densely inhabited suburbs of Arles.

Fig. 2: schematics of. the future overtopping resistant levee and the railway embankment with the transparency structures

Fig. 3: compared modelled consequences of the historic flood (1856 – 250 years event) before and after the project (Source: SYMADREM)

References  on the design of the system: 

Cheetham, M., Mallet, T., Chastel, E., Tourment R., Robustelli, P., Pelt, P., - - 2015. Building a resilient system of defence against flooding from the Rhône. Proceedings of the Institution of Civil Engineers-Water Management, vol. 168, n° 2, p. 74-84

Cheetham, M., Tourment, R., Pelt, P. - 2016. Risk assessment and economic appraisal of protection methods for the Tarascon-Arles railway embankment. 3rd European Conference on Flood Risk Management FLOODrisk 2016 17/10/2016-21/10/2016, Lyon, FRA. E3S Web Conf. Volume 7, 2016. 3rd European Conference on Flood Risk Management (FLOODrisk 2016). 8 p.

Summer 2019

During the summer of 2019, over two periods of barely more than 48 hours, five out of the ten opening structures(like the one in figure 4)  were put in place in the railway embankment. The planning of these operations started years in advance, as it involved the disruption of the rail traffic on a major line of train transport for both passengers and goods. The five other ones are being constructed now at a short distance along on the side of the railway embankment and will be put in place during the summer of 2020. During each of these sequences of non-stop operation, the following steps have to be successively completed:

  • Cutting the rails
  • Creating an opening in the embankment (Fig.5),
  • Adding a layer of material to support the structure,
  • Moving the concrete structure in its final place and checking its proper placement (Fig. 6), as well as smaller parts on each side, also prefabricated (Fig. 7),
  • Filling the space between the embankment and the concrete with new embankment and compacting it (Fig. 8)
  • Adding railway ballast
  • Repairing the rail line and setting it to ensure its performance (Fig.9)

The hazard of a flood happening during these crucial phases was considered and measures were taken to minimize the risks, including being able to close the embankment openings in case of a flood not foreseen when the operation started.

The openings are temporarily closed until the new levee is completely built, in order to keep ensuring the current protection level (Fig. 10). Afterwards stilling basins can be added (Fig. 11)

Marseille 2021 ICOLD Congress

During the Marseille 2021 ICOLD congress, one of the field trips will be organised in this area and the whole complex system will be presented: overtopping resistant levee, opening structures, second line of defence and flood water management.

Fig. 4: one of the opening structures and the equipment used to move it

Fig. 5: open railway embankment

Fig. 6: moving the structure and controlling its placement

Fig. 7a & 7b: additional prefabricated concrete structures for the bottom of the slopes of the embankment

Fig. 8a, 8b & 8c: placing and compacting the new material between the existing embankment and the concrete structure

Fig. 9: the specific engine in charge of placing the railway ballast in order to ensure performance of the rails

Fig. 10: concrete slabs to temporarily close the openings until the new levee is operational

Fig. 11: a stilling basin in construction

Fusion of information from geophysical and geotechnical investigations for levee assessment

The identification of levees constitutive materials, as well as the detection of possible interfaces and anomalies, are crucial for site characterization. During investigation campaigns, complementary geophysical and geotechnical methods are usually used. These two sets of methods yield data with very different spatial scales and different levels of incompleteness, uncertainty and inaccuracy. On the one hand, geophysical methods are generally non-intrusive and provide physical information on large volumes of soils but with significant potential uncertainties. These uncertainties are due in particular to the integrative and indirect aspects (relative to the parameters related to failure modes limit state equations) of the methods as well as to the resolution of the inverse problems. On the other hand, geotechnical investigation methods are intrusive and provide more local information but also more accurate and very often directly related to parameters related to failure modes limit state equations. An important issue to improve the characterization of subsoils and existing levees is to be able to combine acquired geophysical and geotechnical data, while taking into account their respective uncertainties, inaccuracies and spatial distributions. The complementarity of these two sets of methods is often underused since the uncertainty and inaccuracy associated with each method are rarely considered. Furthermore, results are usually only graphically superimposed and considered with an expert opinion instead of being mathematically merged. These works propose a specific methodology in order to manage conflictual information and different levels of uncertainties and inaccuracies from different investigation methods, expanding geotechnical information between borehole positions. It presents a new way of mathematically combining data from these two types of information sources, taking into account the specificities of each kind of method. This new methodology considers the framework fixed by the theory of belief masses and improves the characterization of lithological sets within levees and their foundation. It provides information on the level of conflict between information sources while proposing a confidence index associated with the results.

By: Théo Dezert

Figure 1: Section of a levee with representation of lithological materials having the highest belief mass values after fusion process between electrical resistivity, granulometry and CPT data (left) and their associated belief mass values (right).

Figure 2: Levee modeled resistivity longitudinal section obtained by inverting Wenner-Schlumberger apparent resistivity data
Figure 3 : ISBT vertical profiles for each CPT test and associated soil classes
Figure 4 : Representation of the levee section displaying borehole positions in dashed lines and associated ISBT (white dotted line) and particle size distribution (white solid line) corresponding classes

 

References :

Journal articles:
  • Dezert, T., Fargier, Y., Lopes, S. P., & Côte, P. (2019). Geophysical and geotechnical methods for fluvial levee investigation: A review. Engineering Geology, 105206.
  • Dezert, T., Lopes, S. P., Fargier, Y., & Côte, P. (2019). Combination of geophysical and geotechnical data using belief functions: Assessment with numerical and laboratory data. Journal of Applied Geophysics, 170, 103824.
Conference papers:
  • Dezert, T., Fargier, Y., Palma-Lopes, S., & Côte, P. (2019, September). Levee Characterization by Means of Data Fusion of In-Situ Geophysical and Geotechnical Information. In 25th European Meeting of Environmental and Engineering Geophysics (Vol. 2019, No. 1, pp. 1-5). European Association of Geoscientists & Engineers.
  • Dezert, T., Fargier, Y., Palma-Lopes, S., & Cote, P. (2018, September). Application of Belief Functions to Levee Assessment: chapter X in: Belief Functions: Theory and Applications.

https://hal.archives-ouvertes.fr/hal-01891806/

  • Dezert, T., Lopes, S. P., Fargier, Y., & Cote, P. (2018, September). Geophysical and Geotechnical Data Fusion for Levee Assessment-Interface Detection with Biased Geophysical Data. In 2nd Conference on Geophysics for Mineral Exploration and Mining (Vol. 2018, No. 1, pp. cp-566). European Association of Geoscientists & Engineers.

https://www.earthdoc.org/content/papers/10.3997/2214-4609.201802536

ICOLD Meeting 2020 New Delhi

UPDATE (4 March) : the meeting has been postponed due to the Coronavirus epidemic. The new dates are: Sat. 26 Sept. – Th. 01 Oct. 2020.
The dates for the WG workshop and meeting are on Sunday 27th and Monday 28th respectively.


The 2020 ICOLD meeting will be in New Delhi, India, from 4 to 10 April. Registration is now open and the early bird rate ends at the end of January, so hurry if you want to benefit from this reduced rate. Information and registration here : https://www.icold2020.org  The third bulletin is available on line on the same web site.

The Levees Technical Committee of ICOLD (ICOLD LE TC)  will hold a workshop on Monday  6 and a meeting on Tuesday 7. During registration attendees have to indicate which TC workshop and meeting they plan to attend. We invite all our levees community members to register for these TC events, wether a member of the LE TC, of  the EUCOLD LFD WG or simply interested in levees, and to encourage your colleagues and relations to do the same. It is important that we have a large attendance for a wide exchange of information and knowledge, and it is also important to register for logistic reasons (room size).

NB: LE TC members not able to attend are strongly advised to have a colleague from their national dam committee to attend the TC workshop and meeting on their behalf.

new geotechnical software

Rijkswaterstaat has launched new geotechnical software for slope stability on November 28th

This was developed together with Deltares and our dike reinforcement program HWBP (The Slope Stability Project / POV Macrostabiliteit).

Raymond van der Meij from Deltares was the main driving force behind the development. Meindert Van was one of the initiators.

We have merged the knowledge from five different initiatives in the Netherlands on slope stability in the new software.

 

It will be available on the Deltares and on the Rijkswaterstaat website (Helpdeskwater.nl)

It will be in the English language. The software is available to everyone (free of charge). Support for users who assess or design flood defenses in the Netherlands is covered by Rijkswaterstaat. Support for user in other countries will go through Deltares (this is not free of charge).

 

The user manual is available on

https://www.helpdeskwater.nl/publish/pages/169760/user_manual_d-stability_v20_1.pdf

 

Request: information on drought effects (e.g., cracks) in levees

Dear all,

During last month’s EURCOLD Symposium I presented a paper on drought effects on levees; see https://www.researchgate.net/publication/336641742_Mitigating_drought_risk_for_levees_Mitigating_drought_risk_for_levees . For the Sept2020 Floodrisk Symposium, I wish to extend this work and include some more experiences regarding drought effects on levees. However, it turned out to be quite hard to find publications and data (such as drought crack dimensions+position and other properties, drought crack development and recovery, best practices on remedial measures, etc.). Who can help me out, and send me some useful weblinks/publications and/or [summarized] data?

Thanks in advance!

Marcel Bottema

ECMSGE 2019

The XVIIth ECSMGE conference, held in Reykjavik  with the theme “Geotechnical Engineering, ​foundation of the future” on September 1-6, had a lot of content related to levees and also to dams.
​ISSMGE TC201 on “Geotechnical aspects of Dykes and Levees” has some members in common with ICOLD LE TC and EUCOLD LFD WG.  We will in the future continue to exchange information between our ICOLD groups and TC201, as well as encourage actual collaboration (see report).
With the help of Meindert Van for review and of Cor Zwanenburg for a list of levee papers, we produced a report on the conference with links to additional information, that we encourage you to read.

The report is available for download from our “Members only” menu in the web site.

FLOODrisk2020 : last week to submit an abstract

FLOODrisk 2020

Attention – 1 week left to end of abstract submission

We would like to remind you all that the call for abstracts for the 4th European Conference on Flood Risk Management, that will take place in Budapest will close on 16th September 2019.

FLOODrisk2020 is committed to attract, coach and listen to the next generation of scientists and practitioners who will future-proof our research methods and help to improve our flood risk management practice in order to better cope with deep uncertainty and therefore the 4th conference will focus on the issue of Science and practice for an uncertain future.

YOU NOW HAVE LESS THAN 1 WEEK LEFT TO SUBMIT YOUR ABSTRACT on https://floodrisk2020.net/authors-area/

New issue of our LFD WG newsletter

Hello

we have  issued a new issue of our Levees and Flood Defences  Working Group  newsletter. You can find it available for download on our website.

It concentrates on the different levees related conferences of this year: the ICOLD annual meeting, the ECSMGE conference, and the EUCOLD symposium. It also includes a special feature presenting the extreme flood events on the Missouri in the USA.

Thanks to all the contributors, particularly Noah Vroman from USA for the long paper, and Sam Leonard from UK for the editorial task.

I hope you enjoy it.

Rémy

EUCOLD 2019 Symposium

We encourage all our members to attend the EUCOLD Symposium on October 2-4  (https://www.eurcold2019.com) and particularly the two days organized  by our WG (https://www.eurcold2019.com/eucold-wg-lfd) on Sept. 30 and Oct. 1

Please also disseminate this information among your contacts interested in levees and flood defences.

FLOODrisk2020

 

The deadline for submitting abstracts to the next FLOODrisk conference has been extended to the 16th September : https://floodrisk2020.net/news/abstract-submission-deadline-extension/

Levees and Flood Defences are definitely a topic and I encourage every EUCOLD LFD WG and/or ICOLD LE TC to submit an abstract.

Call for contributions for the 4th Edition of the Levee Working Group Newsletter!

We are looking for articles relating to the engineering, operation, maintenance of Levees… and anything else Levee related that you think will be of interest, for the 4th edition of the Levee Working Group Newsletter.

Article length should be around 500 words or less, and include a photo, map or diagram.

The Newsletter will be published soon, so please can you send contributions by  5th of July,.

Please send any articles to the editor – Sam Leonard (sam.leonard@environment-agency.gov.uk)

Thanks 🙂

Call for newsletter articles

Issue 3 of the Newsletter has recently been published. The EUCOLD Levee Working Group Newsletter is now looking for article contributions for the 4th issue which will be published later in summer of 2019.

We will be looking for articles relating to the engineering, operation, maintenance of Levees… and anything else Levee related that you think will be of interest.

Please send any articles onto the editor – Sam Leonard (sam.leonard@environment-agency.gov.uk)

 

Newsletter issue 03 (April 2019)

A new issue of our LFD WG newsletter is available on the dedicated page of our web site : https://lfd-eurcold.inrae.fr/index.php/wg-newsletter/

Thanks to the editorial team, particularly Sam Leonard and Adrian Rushworth of the UK Environment Agency and also

to to all contributors.

Digues 2019 conference : success and deliverables

The third French Conference on Levees (“Digues 2019”) was held in Aix en Provence on 20-21 March 2019 with technical visits on the Rhône levees on the 22.

It was a success with 100 abstracts submission, 300 participants, 77 final papers, 50 oral presentations and 26 posters.

The book of abstracts is available, with English abstracts, in the “Levee related documents” page of our web site. Full text papers are available online on zenodo.org.

Deadline to submit abstracts for EUCOLD symposium

Last days to send an abstract for the 11th ICOLD European Club Symposium. Deadline is Monday 18th February 2019. All topics refer to all dams – large and small, reservoirs, levees and flood defenses.

Important Dates

Abstracts Submission (300 words max)Monday 18th February 2019
Abstracts AcceptanceFriday 15th March 2019
Full Paper Submission (10 pages max)Monday 30th of April 2019
Full Paper AcceptanceFriday 31st of May 2019

New Year newsletter

Now it is 2019 it is time to think of the next group newsletter. A lot is happening in the world of Levees and it will be good to share what you have been doing. As a guide articles between a quarter and a whole page work well. Photographs and pictures are useful to bring an article to life.

So, please send your articles by the 27 January to Sam Leonard (Sam.Leonard@environment-agency.gov.uk) or Justin Watts (Justin.Watts@environment-agency.gov.uk)

Assessing and managing the risks of transitions in flood defence infrastructure

 

Workshop on  “Assessing and managing the risks of transitions in flood defence infrastructure”

The Environment Agency has teamed up with international experts to help risk management authorities to consider the risks associated with transitions in flood defence structures. The international consortium, made up of HR Wallingford, Royal HaskoningDHV, Deltares, IRSTEA and USACE, integrates current international knowledge and practice on transitions combined with working UK knowledge and practice on risk based tools for asset inspection and management. The project aims to:
• consider the presence of transitions during flood defence condition assessment
• quantify the effects of transitions on flood defence performance and flood risk
• manage the risk of transitions with improved design and retrofit solutions.


Credit: Royal HaskoningDHV

Credit: Royal HaskoningDHV

On 9 October a stakeholder meeting was hold in London to provide the opportunity to influence the direction of the project and to benefit from stakeholder’s experience managing flood defences. The animated discussion focused on specific reliability methods for transitions and the approaches for inspecting them. The workshop also provided the opportunity to hear about the management strategies being employed in the US, France and the Netherland to mitigate the risks associated with transitions.

More information about the project here: http://www.hrwallingford.com/projects/assessing-and-managing-risks-with-transitions-in-flood-defence-infrastructure

Photo OwenTarrantPhoto Owen TarrantPhoto Owen Tarrant

Thoughts on ICOLD Congress, Vienna

 

photo by Ilze Plomp – van der Sar

This was my first ICOLD meeting and was the first formal ICOLD Technical Committee on Levees (TC LE) after it had been setup at the meeting in Prague. Here are a few of my thoughts.

Not only was this the first formal meeting of the LE TC the Congress was also important because Q103 for the congress was on the subject of small dams and levees. Rémy Tourment from France was the general reporter for this question who is also the chairman of the ICOLD TC LE. An interesting range of Reports were presented in four sessions with worthwhile discussion at the end of each session.

ICOLD TC LE also held a workshop on Monday 2 July. Other than providing an opportunity for presentations from new member countries, a significant amount of time was spent in gathering ideas for the dams and levees intercomparison report, using a facilitated brainstorming process. By the end we had a wall of Post It notes with very useful material. One point for the future is to use stickier notes as several did not stay on the wall. This material will be used by a small team from the Committee to further develop the report.

Adrian Rushworth (with thanks to Jonathan Simm for material)