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  2. Activity : Overflow tests - Rock bag emergency measures
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Activity Name:

Overflow tests - Rock bag emergency measures

Activity Numbre:

132

Activity type

Other

Involved Workpackage

Flood defences
Emergency response
Knowledge infrastructure

Objective

To test emergency measures on its strenght.

Activity Brief descriptor

The rock bags are placed during an WP2 activity.

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 31, 2021, midnight

End Date:

March 31, 2021, midnight

Active time length:

Days:

None

Hours:

None

Other:

Location

Levee stretch:

Other

Coordinates/ Latitude (WGS):

None

Coordinates/ Longitude (WGS):

None

Coordinates/ Altitude (mTAW):

None

Descriptor:

Other references:

Data

Data: 1

Data type: powerpoint in pdf
Description: presentation of rockbags monitoring plan
Date availability: None
Find at: https://stowanl-my.sharepoint.com/:b:/g/personal/llhpp_stowa_nl/EZMJ6A-WlE1Mg-TeXgfPTcYBcCmwgFaWv0QuSx6raP3mDQ?e=StiXd5
Media avaliable:
Find media:

Data: 2

Data type: pdf
Description: report field experiments rock bags
Date availability: None
Find at: https://stowanl-my.sharepoint.com/:b:/g/personal/llhpp_stowa_nl/EYKewxl7NHZLn_AudrSSPqQB0D8xibnUVjw1YjjDdElI-w?e=ZOV0id
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Relationships with other activities

  • Activities that are linked to 132/ Overflow tests - Rock bag emergency measures :

    No activities

  • DB_id: 132/ Overflow tests - Rock bag emergency measures

  • DB_id: 132/ Overflow tests - Rock bag emergency measures linked to the following activities:

    DB_id: 111/ Semi-permanent reparation with Rock Fill

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

The rock bags collapsed really fast. The sides of the bags eroded and sand is flushed out underneath. This was reason for further investigaion.

Post-activity conditions

Immediate Results

It seemed that moles and mouces searched for shelter under the rock bags. The overflowing water used the holes to flush all the sand underneath the rock bags. Thereby the sides were eroding as the connection was not good enough with the grass cover.

Results /Conclusion

Infrastructure Knowledge

Other key information