QWAST uses a discharge distribution table to distribute the discharge from Lobith to the Waal, Nederrijn and IJssel. The table includes which proportion of the discharge from Lobith goes to the Pannderdensch Kanaal, and a table about which percentage of the discharge of the Pannderdensch Kanaal goes to the Nederrijn. The percentages are given for each Lobith discharge, for example:
| Discharge at Lobith (m3/s) | Percentage to Pannerdensch Kanaal from Lobith (fraction) | Percentage to Nederrijn from Pannerdensch Kanaal (fraction) | Discharge Pannerdensch Kanaal (m3/s) | Discharge Waal (m3/s) | Discharge Nederrijn (m3/s) | Discharge IJssel (m3/s) |
| 0 | 0.18 | 0.19 | 0 | 0 | 0 | 0 |
| 600 | 0.18 | 0.19 | 105 | 495 | 20 | 85 |
| 650 | 0.18 | 0.17 | 115 | 535 | 20 | 95 |
| 700 | 0.18 | 0.16 | 125 | 575 | 20 | 105 |
| 750 | 0.18 | 0.15 | 134 | 615 | 20 | 114 |
| 800 | 0.18 | 0.14 | 144 | 655 | 20 | 124 |
| 823 | 0.18 | 0.13 | 149 | 674 | 20 | 129 |
The light blue colums are the input for QWAST, and the white colums are the resulting discharges calculated by QWAST. This calculation is valid if there is no discharge through the "Betuwe Inlaat" (Gemaal Pannerling to the Linge). If there is a discharge for Betuwe Inlaat, the discharge of the Pannerdensch Kanaal is decreased with that value, and only the rest of the water is distributed to the Nederrijn and IJssel:
| Discharge at Lobith (m3/s) | Percentage to Pannerdensch Kanaal from Lobith (fraction) | Percentage to Nederrijn from Pannerdensch Kanaal (fraction) | Discharge Pannerdensch Kanaal (m3/s) | Discharge Waal (m3/s) | Discharge Betuwe Inlaat | Discharge Nederrijn (m3/s) | Discharge IJssel (m3/s) |
| 0 | 0.18 | 0.19 | 0 | 0 | 0 | 0 | 0 |
| 600 | 0.18 | 0.19 | 105 | 495 | 10 | 18 | 77 |
| 650 | 0.18 | 0.17 | 115 | 535 | 10 | 18 | 87 |
| 700 | 0.18 | 0.16 | 125 | 575 | 10 | 18 | 96 |
| 750 | 0.18 | 0.15 | 134 | 615 | 10 | 19 | 106 |
| 800 | 0.18 | 0.14 | 144 | 655 | 10 | 19 | 116 |
| 823 | 0.18 | 0.13 | 149 | 674 | 10 | 19 | 121 |
Different distributions can be calculated. Each distribution is named after the river bed and year was used to calculate it. A distribution can be activated by using the corresponding batch file: e.g. „QWAST_100perjaar_REF2017_bodem2000.xml”. If a batch file is chosen without „bodem” extension, the default distribution is activated: bodem2018.