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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Mineral clogging starts to develop at the interface between the geotextile (or pipe wall) and the adjacent soil. It is therefore defined as a contact process. Two clogging processes can be distinguished: contact erosion ... which occurs when particles of nearly all sizes are washed out locally and contact suffosion ... when only the fine particles are washed out leaving a skeleton, consisting of coarser particles, behind. In subsurface drainage systems, contact erosion should be restricted. Contact suffosion is allowed, provided however that the envelope does not clog.  1, record 1, English, - contact%20suffosion

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

Suffusion : Tassement de la surface du terrain par la lévigation (due aux eaux souterraines) des composants solubles ainsi que par le déplacement des particules colloïdales qui constituent la roche meuble.  2, record 1, French, - suffusion%20par%20contact

Record 1,  Textual support,  Spanish