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  2. Activity : Evaluation Emergency Reparation (Levee challenge)
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Activity Name:

Evaluation Emergency Reparation (Levee challenge)

Activity Numbre:

129

Activity type

Other

Involved Workpackage

Flood defences
Emergency response
Knowledge infrastructure

Objective

Activity Brief descriptor

Evaluating the incision and the sand bag method after 2 months on the location

Linked to theme(s):

Breaching
Animal- & vegetation-induced anomalies
Erosion processes
Temporary levee repairs
Levee survey & monitoring technique
Prolonged collaboration

Activity Time

Start Date:

March 2, 2021, midnight

End Date:

March 2, 2021, midnight

Active time length:

Days:

1

Hours:

None

Other:

Location

Levee stretch:

VI

Coordinates/ Latitude (WGS):

None

Coordinates/ Longitude (WGS):

None

Coordinates/ Altitude (mTAW):

None

Descriptor:

Other references:

Data

Data: 1

Data type: pdf
Description: link to the reports of the levee challenge candidates
Date availability: None
Find at: https://stowanl-my.sharepoint.com/:f:/g/personal/llhpp_stowa_nl/EhCtJP7v8GBGkO4ujyQ2DKEB3cpuL_1ECro-pyvcUo1kSQ?e=4hh9i5
Media avaliable:
Find media:

Relationships with other activities

Detaled information about the activity

Pre-conditions

Activity Descriptor

Equipments

this activity does not have equipments

Monitoring & Sensors

this activity does not have sensors

Limits

During Activity

After the placing of the emergency measures the measures stayed there for a couple of months. To evaluate how the subsoil behaved and the emergency measure hold in time a group of students from the levee challenge helped. - Grass pulling tests were executed by infram to identify the strength of the grass. The results of the grass pulling test are on the sharepoint. - Friction tests were executed on the grass/ EPDM and The friction tests were difficult as the sand bags were so deteriorated. No clear friction coefficient was found as the underground was so different and full of bumbs. - Pull force of the incision method is tested The incision method was still really strong. It was impossible to pull out the EPDM foil underneath the grass cover with two persons with more than 100kg puling force. - Conditions of the sand bags The sand bags were in really bad condition. After 6 weeks the material is degrading and the sand is flushing out. The anchors don't help the tearing process as these bags deteriorate first.

Post-activity conditions

Immediate Results

Results /Conclusion

The results of the grass pulling tests are on the sharepoint.

Infrastructure Knowledge

Other key information