Table 2 Common problems of small dams in Vietnam cited by key stakeholders
ID |
Problems of small dams in Vietnam |
Number of participants |
Percentage of participants* |
1 |
Erosion damage |
14 |
93% |
2 |
Seepage |
14 |
93% |
3 |
Cracking |
11 |
73% |
4 |
Inability to store design water capacity because of silting and/or leakage |
10 |
67% |
5 |
Blocked spillway |
10 |
67% |
6 |
Inappropriately designed spillway |
10 |
67% |
7 |
Vandalism damage |
10 |
67% |
8 |
Damaged by traffic |
9 |
60% |
9 |
Outlet leakage |
9 |
60% |
10 |
Outlet broken |
9 |
60% |
11 |
Settlement |
6 |
40% |
12 |
Damage from animal burrowing |
5 |
33% |
13 |
Excessive vegetation and/or trees |
5 |
33% |
14 |
Sinkholes |
3 |
20% |
15 |
Slides and/or slumps |
2 |
13% |
16 |
Low area on the crest of dams |
2 |
13% |
Note *On the basis of fifteen participants