Remove empty BU after X years

[jipclaassens]

Do we want this?

We have an absolute claim for BU, if we remove empty BU. How much builtup do we allocate in the future?

[jipclaassens]

How much empty BU do we have in 2100?

[cjacobscrisioni]

From Lewis, 5/9/24: Can someone check how many cells have residential built-up and no residents? I propose that we removed this built-up after a decade. In this way, the built-up area per capita in Europe will grow less.

[jipclaassens]

Yes, we could do it like in LUISA (Maarten pointed me towards this option), where we register abandoned residential areas, which could be easier to repopulate than natural/agricultural land.

[jipclaassens]

No, that won't work. Since we allocate first BU for all years and then population. So I've now implemented it in the indicators.

/Analysis/Future/Indicators/Prep/BuiltUp_Residential_Area_Without_Abandoned

[cjacobscrisioni]

Indeed marking it as empty BU would be preferrable. quick check that may be necessary: how much urban land without population do we have in 2020? Those may already be abandoned or function as e.g. holiday homes.

[MaartenHilferink]

Alternatief: bereken Avg BU weighted to pop := $\sum BU \cdot pop / \sum pop \cdot pop$
in plaats van Avg BU := $\sum BU / \sum pop$