Land Use Input and Output Rates
In this module it is possible to specify the rates at which commodities are used or produced for each landscape type. The current suite of input and output variables includes water and forage consumption, and production of animal waste, nitrogen runoff, phosphorus runoff, and sediment runoff.
Input tables
1. Water demand
- For each landscape type and footprint type, enter the demand for water (m3 water / year / hectare) during the simulation period.
- For each energy sector well type (conventional oil, natural gas, bitumen), enter the demand for water (m3 water / year / m3 of hydrocarbons produced) during the simulation period.
- Enter the human demand for water (m3 water / year / person) during the simulation period.
- For each livestock species (cattle, swine, horses), enter the demand for water (m3 water / year / animal) during the simulation period.
- Enter the demand for water associated with wood production ( (m3 water / year / m3 of wood harvested) during the simulation period.
- For each landscape type, enter the initial proportion of the landscape type that receives water through irrigation
2. Nitrogen application rate
For each crop type, enter the nitrogen application rate (tonne / ha / year) during the simulation period.
3. Phosphorus application rate
For each crop type, enter the nitrogen application rate (tonne / ha / year) during the simulation period.
4. Forage requirement
For each livestock species (cattle, swine, horses), enter the annual forage requirement (tonne / AU / year) during the simulation period.
5. Manure production
For humans and for each livestock species, enter the annual manure production (tonne wet weight / AU / year) during the simulation period.
6. Nitrogen runoff
For each landscape type and footprint type, enter the annual runoff of nitrogen (tonne / hectare / year) during the simulation period.
7. Phosphorus runoff
For each landscape type and footprint type, enter the annual runoff of phosphorus (tonne / hectare / year) during the simulation period.
8. Sediment runoff
For each landscape type and footprint type, enter the annual runoff of sediment (tonne / hectare / year) during the simulation period.
9. Proportion of each landscape type in which runoff occurs
For each landscape type, enter the annual runoff of nitrogen, phosphorus, and sediment (all in tonne / hectare / year) during the simulation period.
Graphic inputs
Temporal trend in commercial water demand
Enter the commercial demand for water (m3 / year) for each year of the simulation period. Values may be constant or they may vary over time. Commercial demand arises from land use practices that involve the primary, secondary, and tertiary processing of wood, hydrocarbons, crops, livestock, and other assorted industrial fabrications.
Switches
Precipitation-based nitrogen run-off
If this switch is on, then nitrogen runoff responds linearly to the inter-annual variation in water supply provided by precipitation.
Precipitation-based phosphorus run-off
If this switch is on, then phosphorus runoff responds linearly to the inter-annual variation in water supply provided by precipitation.
Precipitation-based sediment run-off
If this switch is on, then sediment runoff responds linearly to the inter-annual variation in water supply provided by precipitation.
Precipitation-based water demand
If this switch is on, then water demand for agricultural crops and livestock responds linearly to the inter-annual variation in water supply provided by precipitation.
Temporal changes in land use flows
In this module it is possible to specify the rates at which commodities are used or produced for each landscape type. The current suite of input and output variables includes water and forage consumption, and production of animal waste, nitrogen runoff, phosphorus runoff, and sediment runoff; the list of input and output variables can be changed.
Graphic inputs
Relative changes in water demand and runoff of nitrogen, phosphorus and sediment
- Enter the relative change in water demand during each year of the simulation period. Values may be constant or may vary over time, and may range between -1 and 1. For example, a relative change of -.5 (-50%) would decrease water demand by 50%; a relative change of 1 (100%) would double water demand.
- For each of nitrogen, phosphorus and sediment, enter the relative change in runoff during each year of the simulation period. Values may be constant or may vary over time, and may range between -1 and 1. For example, a relative change of -.5 (-50%) would decrease runoff by 50%; a relative change of 1 (100%) would double runoff.
Relative changes in the proportion of non-agricultural landscape types receiving water, nitrogen, phosphorus and sedimentation
Enter the relative change in the proportion of each landscape type receiving applications of water, nitrogen, phosphorus and sedimentation during each year of the simulation period. Values may be constant or may vary over time, and may range between -0.8 and 1.2. For example, a relative change of -0.8 (-80%) would decrease the proportion of landscape types that receive water, nitrogen, phosphorus and sedimentation by 20%; a relative change of 1.2 (120%) would increase the proportion by 20%.
Temporal changes in the proportion of agricultural landscape types receiving water, nitrogen, phosphorus and sedimentation
For each agricultural cover type, enter the relative change in the proportion of the cover type that receives applications of water, nitrogen, phosphorus and sedimentation during each year of the simulation period. Values may be constant or may vary over time, and may range between 0 and 2. For example, a relative change of 0.8 (80%) would decrease the proportion of landscape types that receive water, nitrogen, phosphorus and sedimentation by 20%; a relative change of 1.2 (120%) would increase the proportion by 20%.