In the industrial module, the following calculations are made:
Calculation of past situation (billing data available)
| industrial water use (billed) from network |
+ |
unaccounted for water
= (unbilled water + losses) |
+
|
industrial water abstracted from own wells |
= | industrial water use per settlement |
Note: Table QURT_BILLED_INDUSTRY contains both network and billed data. However, some of the information has been transferred from table MONTHLY_PRODUCTION (which means water production from wells).
Calculation of future situation:
| Net water demand for industries of a DC |
+
|
losses | = | industrial water demand per DC |
Note: The unaccounted for water and losses are calculated within the Losses Module !
The calculation of the development of industrial demand uses the following formula:
| IWn | = | (IWb * (1 + G/100)N + S) * C |
|
with |
||
| IWn | = | projected future industrial water demand in m³/month |
| IWb | = | industrial water demand in m³/month in for previous time step |
| G | = | assumed yearly industry water Growth rate in % for selected industry and scenario |
| 100 | = | factor to convert from percentage to fraction |
| N | = | Time step in years N = (2005 - reference year); for the next steps: N = 5 ( 2010, 2015 etc.) |
| S | = | Sudden increase/decrease in m³/month. Different values for supply from network or supply from own wells can be used! |
| C | = | Capacity in % of total operating capacity of the facility |
The general concept of growth rate and migration is again applied.
Wastewater generated from industries is calculated as follows:
| IWw | = | R * IWn / 100 |
|
with |
||
| IWw | = | wastewater generated from industries |
| R | = | Return factor = % of water use discharged as wastewater (one figure for each scenario). |
| 100 | = | factor to convert from percentage to fraction |