 |  | Special Public Works Programmes - SPWP - Anti-Erosion Ditches - Training Element and Technical Guide for SPWP Workers, Booklet No. 1 (ILO - UNDP, 84 p.) |
 |  | (introduction...) |
| | 1. What is erosion? |
| | 2. How to recognise erosion |
|  | 3. Different types of anti-erosion ditches |
| | (introduction...) |
| | 3.1 Silt catchment pits |
| | 3.2 Forest tiering |
| | 3.3 Forest terracing |
| | 3.4 Cropping terraces |
| | 4. Worksite organisation |
| | (introduction...) |
| | 4.1 Good management of the workers |
| | 4.2 Good selection of tools |
| | (introduction...) |
| | 4.2.1 Surveying Instruments |
| | 4.2.2 Tools used in the digging of ditches |
| | 5. Procedure |
| | 5.1 Site selection |
| | 5.2 Siting of the ditches |
| | 5.3 Plotting the dimensions of the ditch |
| | 5.4 Preparing the surface soil of the ditch site |
| | 5.5 Excavating the ditch |
| | 5.6 Checking the dimensions of the ditch |
| | 5.7 Constructing the retaining banks |
| | 5.8 Checking that the retaining banks are horizontal |
| | 5.9 Improving the waterways |
| | 5.10 Protecting the slopes |
| | 6. Maintenance of the retaining banks |
