Gap ID | Area researched | Researchers and areas that they have investigated | |||||||||
Bokor | Butler | Cummings | Gormley | Gauley | Lillywhite | Littlewood | PERC | Swaffield | Wakelin | ||
1.0 | Forces on solids | ü | ü |
|
|
|
| ü |
| ü | ü |
2.0 | Influence of TP |
|
| ü |
|
|
| ü | ü |
|
|
3.0 | LSTD |
| ü |
|
|
|
| ü |
| ü |
|
4.0 | WC usage behaviour |
| ü |
|
|
| ü |
|
| ü |
|
5.0 | WC type |
|
|
|
|
|
|
|
| ü |
|
6.0 | WC flush volume |
|
|
|
|
|
| ü |
| ü |
|
7.0 | Pipe configuration |
|
|
|
|
|
|
|
| ü |
|
8.0 | Pipe dimensions | ü | ü | ü | ü | ü | ü | ü | ü | ü | ü |
9.0 | Pipes (non-circular) |
|
|
|
|
|
|
|
| ü |
|
10.0 | Pipe gradient | ü | ü | ü | ü | ü | ü | ü | ü | ü | ü |
11.0 | Simulated faeces | ü |
|
|
| ü |
|
| ü | ü |
|
12.0 | Faeces degradation |
| ü |
|
|
|
|
|
|
|
|