Everything about N-OT01 Overtopping Test (Reference) 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 169;N-OT01 Overtopping Test (Reference);Strength test;The test was conducted on a ‘test section with a uniform vegetation cover’, i.e. well maintained, and would serve as a reference. The test section of wave overtopping experiment has a width of 4 m. The length of the vegetation is about 10 cm (which is considered ‘short’). Besides some bare spots, molehills are present along the slope. The thickness of the cover layer equals ~70 cm. The slope is 1:2,5.;False;False;False;False;False;False;;;6;;5 consecutive wave sets + the 5th repeated;VI;;;12.0;Landward slope of levee.;;The test was conducted on a ‘test section with a uniform vegetation cover’, i.e. well maintained, and serves as a reference.;Impact of wave overtopping on a grassed-covered levee.;Levee slope is visually in good condition.;The following wave sets were consecutively applied: 0,5m60lsm, 0,5m60lsmov, 1m190lsm, 2m50lsm and 2m100lsm (repeated).;Wave front velocities are measured along the slope for predefined overtopping volumes ranging from 300 l/m to 3400 l/m.;Action Cams are used.;;Interesting phenomena took place. Mole holes rince out gradually with time. From the third wave set on, a gravel box at the toe, which serves as drain, became visible. Near the end of the third set, sand from the levee core was released from a mole hole outside the test section.;No critical damage after 5 wave sets. Continuing the experiments by repeating the 5th set, the area with an undermined slope (likely following erosion of the sandy core via mole holes with sand leaving through a hole outside the test section), suddenly failed after 3 hours. 45 minutes later, an erosion pit of 3m by 4m and a depth up to 1m was formed.;A well-maintained levee cover with a uniform vegetation, even with presence of some bare spots and/or molehills, was able to withstand consecutively all 5 wave sets.;;;;True;False;False; All DATA concerning N-OT01 Overtopping Test (Reference) No data added All EQUIPMENTS concerning N-OT01 Overtopping Test (Reference) No equipment added All SENSORS concerning N-OT01 Overtopping Test (Reference) No sensors added