In:
Grundwasser, Springer Science and Business Media LLC, Vol. 27, No. 4 ( 2022-12), p. 295-308
Abstract:
In recent decades, there have been individual cases of severe damage to geotextile filter systems as a result of clogging by flocculated ochre-containing minerals. Due to a strong reduction of the permeability of the geotextiles in combination with high hydrostatic pressure, the armour layers of various revetments in the tide-influenced waterways of the Ems and Weser rivers have been uplifted and damaged. To date, the environmental conditions, i.e. groundwater and surface water conditions as well as aquifer and revetment material, under which ochre formation occurs in geotextile and granular filter systems, have not been systematically investigated. In this paper, the first step is to derive criteria for evaluating the tendency of ochre formation from theoretical studies and data analyses of groundwater and surface water investigations. These criteria or DOCP (decisive ochre clogging parameters) indicate amounts in the Ems, Weser and Elbe estuaries that facilitate or enable clogging phenomena. In a second step, these investigations will be used to derive boundary conditions for future systematic in-situ investigations of hydraulic engineering filter systems as well as for an experimental model.
Type of Medium:
Online Resource
ISSN:
1430-483X
,
1432-1165
DOI:
10.1007/s00767-022-00526-1
Language:
German
Publisher:
Springer Science and Business Media LLC
Publication Date:
2022
detail.hit.zdb_id:
1481438-9
detail.hit.zdb_id:
1330005-2
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