Everything about N-OT03 Overtopping Test (Animal burrow)
id;activity_name;activity_type;activity_descriptor;breaching;animal;erosion;temporary;levee_survey;prolonged;start_date;end_date;date_length_day;date_length_hour;date_other;levee_stretch;location_x;location_y;location_z;location_descriptor;location_other;objectif_important;objectif_knowledge;pre_condition;act_des;monitoring_process;monitoring_reasoning;limits;during_activity;post_activity;activity_result;results_conc;knowledge_desc;ref_links;wrk_1;wrk_2;wrk_3;key_info
171;N-OT03 Overtopping Test (Animal burrow);Strength test;This test was executed on a ‘test section with a uniform vegetation cover’, but with numerous number of mole hills in place (as compared to N-OT01). Artificial burrows in the higher and lower part of the slope were drilled with a connection to the sandy core. The slope is 1:2,5.;False;True;True;False;False;False;;;6;;;VI;;;12.0;Landward slope of levee.;Wave sets 0,5m60lsm, 0,5m60lsmov and 1m190lsm (repeatedly);;;A levee slope with a lot of animal holes present.;The following wave sets were consecutively applied: 0,5m60lsm, 0,5m60lsmov and 1m190lsm (repeatedly).;;;;A slope with a lot of animal holes present, showed no serious damage after the third set of waves. The gravel box at the toe became again visible. Bare spots grew and became more and more noticeable. Continuing by repeating the third wave set gave no signs of imminent failure of the cover. Therefore, 2 artificial burrows (ø = 10 cm) were drilled, in line with each other, one in the higher and one in the lower part of the slope, each consisting of an upward vertical pipe (angle of 90°) connecting with a downward more or less horizontally (angle of -10°) pipe and touching upon the sandy core.;The artificial burrows did not lead to failure.;Numerous mole holes and artificial drilled pipes present and no failure imminent.;;;;True;False;False;


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