| 1. General perception about the RFD system |
| 1-1. What do you think about the RFD system and its sustainability? |
| ① Catchment Area | Good |
| ② Rainwater Harvesting System | Good |
| ③ Rainwater Treatment Room | Good |
| ④ Fountain | Good |
| 1-2. Please state your overall reasons for selecting those options in Q1-1. |
| The system provides clean drinking water. Every water treatment step is monitored regularly. The disinfection processes can also demonstrate that the water quality is safe for use. Therefore, in general, the overall RFD system can be considered to be well managed and sustainable. |
| 2. System management and maintenance |
| | How often do you visit the system? | How often do you clean the system? | Problems and Solution |
| ① Catchment Area | Every week | Every week | Leaves, dust, and other particles make the area appear dirty. Careful cleaning can enable a clean catchment. |
| ② Rainwater Harvesting System | Every week | Every week | – |
| ③ Rainwater Treatment Room | Every week | Every week | – |
| ④ Fountain | Every week | Clean and change the filter every 3–6 months | The flow rate becomes slow due to fouling. However, regular filter exchange and cleaning can resolve this problem. |
| 3. Water quality |
| 3-1. How confident are you at operating the portable water quality device? | Good |
| Monitoring cycle | Every Wednesday | Time consumption for measurement (min) | 50–60 |
| 3-2. Are there any difficulties associated with the use of the portable water quality device? |
| • Every element on the device is written in English. For local people, English is not a familiar language. Therefore, specific education about the device in the native language would be helpful. |
| 3-3. How do you manage the portable water quality tester and what do you do when a problem is found? |
| • No specific problem arose when using the water quality tester. The battery had to be changed once. |
| 4. Water Quantity |
| 4-1. Please complete this table. |
| Parameter | Water level | Water usage | Precipitation |
| Confidence | Good | Good | Good |
| Time for measurement | 5–10 min | 5–10 min | 5–10 min |
| Process description | Open the valve Check the level Close the valve
| Check the number on the water meter Take a photo of the water meter
| Put the gauge on the roof on rainy days When the rain stops, take the gauge and record the number
|
| Difficulties | No | No | No |
| 5. Education |
| 5-1. How long have you been involved in system management? | From August 2019 |
| 5-2. What kind of educational training did you receive? | Training by project headquarter |
| 6. Will you recommend this system to other HCF in Vietnam? | Strongly recommend |
| 7. Do you think this system is needed in Vietnam? | Strongly agree |
| 8. Do you like this management mission? | Strongly agree |
| 9. Do you think any improvement is required for the entire system? |
| • For future RFD systems, a rainwater storage tank that holds a greater volume could supply more sufficient water to users. |
| 10. Please describe your accomplishment while the system management. |
| • I became accustomed to operating the RFD system as the operator. |
| • My technical knowledge of the RFD system, such as filter change and system repair, has been enhanced. |
| • I became more responsible for carrying out my duty as the operator in charge of the system. |