Introduction

QWAST allocates water based on priorities between users according to LHM. As the priorities in LHM 4.3 have been changed, QWAST also have changed to accomodate them. Before LHM 4.3, QWAST was reading district water demands based on user (e.g. water demand for irrigation). QWAST itself gave a priority to the user, which is as close as possible to LHM.

After LHM 4.3, QWAST is reading district demands per priority, he does not read the user (e.g. water demand priority 4). As a consequence, QWAST does not know any more who the user is. However, QWAST has now exactly the same priorities as LHM.

Switching between calculation modes

QWAST is backward compatible with version before LHM 4.3. The two ways of calculation is adjusted in the global.properties file:

• PRIO_TYPE_QST=Prioriteit (LHM 4.3)
• PRIO_TYPE_QST=    (LHM before 4.3)

Note that in the display both options are available. The user should choose the corresponding display.

One more note: for the LHM 4.3 version some of the displays and scenarios are not (yet) supported.

Changes in modifiers and viewers

The district demands are no longer user demands, they only have priority. This is reflected in the data viewer: