RetoSchmucki
commented
6 years ago Sure, these scenarios might be sensible, although we don't know what is the rational behind them (if their is any). The difficulty will be to allocated changes with respect to space and spatial configuration of fields and land boundaries. Remember that a raster has no defined boundaries. One option would be to use the field boundaries (vector format) to identify coherent patch transition. Or some rules enabling spatial contagion of changes with minimum contiguous areas, so you avoid ending a block of forest in the middle of a oil seed rape field, or the reverse :smile:
AugustT
We need to implement the scenarios that ASSIST is producing. Remember, these need only be illustrative, they do not need to be accurate.
I suggest we create a function which takes in a matrix (think raster) of land cover, and returns the same after applying the transformations the the scenario. We can then add parameters to this function to allow us to control the extent of conversions and perhaps the type of scenario run.
John has provided these transitions as a starting point
RULES FOR MINECRAFT VERSIONS OF ASSET SCENARIOS
In all cases, prioritise conversion close to existing areas of the target habitat
I’ve added woodland to the last scenario as this’ll be visually obvious in your Minecraft world.
In my scenarios, conversion to agricultural use preferentially takes place on the land most suitable for it (fertile, workable soils, flat ground etc.) and vice versa. I assume this is a step too far for your examples, but let me know if you want to try it and I can send you the data.
Rules for 30% agricultural expansion, intensive cropping
Agricultural land must expand by a total of 30%.
At least 20% expansion of arable
At least 10% expansion of improved grassland
Relative priorities (in descending order) Improved grassland -> arable Semi-natural grassland -> improved grassland Semi-natural grassland -> arable Heathland -> improved grassland
Crops (i.e. arable land) should become (at the expense of all other crops) at least: 55% winter wheat, 30% oilseed rape
Rules for 30% semi-natural habitat expansion, diverse cropping
Grassland and semi-natural habitats must expand by a total of 30%.
At least 20% expansion of semi-natural grassland
At least 10% expansion of improved grassland
At least 5% expansion of broadleaf woodland
Relative priorities (in descending order) Improved grassland -> Semi-natural grassland Arable -> Improved grassland Arable -> Semi-natural grassland Improved grassland -> broadleaf woodland Arable -> broadleaf woodland
Crops (i.e. arable land) should be at least: 20% winter wheat 10% oilseed rape 20% barley 5% field bean 5% potato 5% sugar beet 5% maize