Table 5 Number of cases with low or medium study validity for each intervention type either alone or in combination

Alone

 Rock material

  Gravel

6

4

  Cobble

14

9

  Sediment

0

1

  Sediment trap

1

1

  Gravel washing

4

7

 Plant material

  Brush

4

0

  Log

1

2

 Waterbody creation

  Bay

0

2

  Stream

9

5

 Human-made structure

  Structure

3

2

 Waterbody modification

  Excavate

1

1

  Riparian

1

0

Combinations

 Log + structure

0

1

 Log + excavate

0

1

 Riparian + vegetation

0

1

 Cobble + sediment trap + gravel

1

0

 Gravel + structure

1

2

 Cobble + structure

0

2

 Cobble + log

2

2

 Cobble + nutrient + log

0

1

 Cobble + gravel

3

2

 Cobble + gravel + excavate

0

1

 Cobble + gravel + log

1

0

 Cobble + gravel + structure + log

1

0

 Sediment trap + gravel + log

3

3

 Log + gravel + structure

0

1