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Water sources
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A region's water source. A river, lake, springs or oasis lets you build irrigated farming and the Large Colony; an aquifer feeds the qanat chain instead. Having any of them rules the rainfed farming chain out.
River
No region carries this tag.
- Lets you build: 9 building levels: Large Colony, Irrigation Ditches (Crops), Basin Irrigation (Crops), Canal Network (Crops), Irrigation Aqueducts (Crops), Irrigated Great Estates (Crops), Public Baths (Sanitation), Aqueduct (Sanitation), Great Bathhouse (Sanitation)
- Blocks: 5 building levels: Land Clearance (Crops), Contour Furrows (Crops), Runoff Water Collection (Crops), Crop Rotation (Crops), Great Estates (Crops)
- Numeric effects where it is present: taxable income +6 (Milling District (Urban)); taxable income +6 to +10 (Brewing Quarter (Urban)); taxable income +10 to +15 (Baking Guild (Urban))
- Numeric effects it withholds (granted only where it is absent): taxable income +3 (Milling District (Urban)); taxable income +6 (Brewing Quarter (Urban)); taxable income +10 (Baking Guild (Urban))
Springs
No region carries this tag.
- Lets you build: 9 building levels: Large Colony, Irrigation Ditches (Crops), Basin Irrigation (Crops), Canal Network (Crops), Irrigation Aqueducts (Crops), Irrigated Great Estates (Crops), Public Baths (Sanitation), Aqueduct (Sanitation), Great Bathhouse (Sanitation)
- Blocks: 5 building levels: Land Clearance (Crops), Contour Furrows (Crops), Runoff Water Collection (Crops), Crop Rotation (Crops), Great Estates (Crops)
Aquifer
No region carries this tag.
- Lets you build: 3 building levels: Qanat Well (Crops), Qanat Network (Crops), Subterranean Aquaducts (Crops)
- Blocks: 5 building levels: Land Clearance (Crops), Contour Furrows (Crops), Runoff Water Collection (Crops), Crop Rotation (Crops), Great Estates (Crops)
Lake
No region carries this tag.
- Lets you build: 9 building levels: Large Colony, Irrigation Ditches (Crops), Basin Irrigation (Crops), Canal Network (Crops), Irrigation Aqueducts (Crops), Irrigated Great Estates (Crops), Public Baths (Sanitation), Aqueduct (Sanitation), Great Bathhouse (Sanitation)
- Blocks: 5 building levels: Land Clearance (Crops), Contour Furrows (Crops), Runoff Water Collection (Crops), Crop Rotation (Crops), Great Estates (Crops)
Oasis
No region carries this tag.
- Lets you build: 6 building levels: Large Colony, Irrigation Ditches (Crops), Basin Irrigation (Crops), Canal Network (Crops), Irrigation Aqueducts (Crops), Irrigated Great Estates (Crops)
- Blocks: 5 building levels: Land Clearance (Crops), Contour Furrows (Crops), Runoff Water Collection (Crops), Crop Rotation (Crops), Great Estates (Crops)
- Numeric effects where it is present: population growth +2 (Palm Wine Maker (Rural)); population growth +2 (Date & Palm Wine Market (Rural))
- Numeric effects it withholds (granted only where it is absent): population growth +1 (Palm Wine Maker (Rural)); population growth +1 (Date & Palm Wine Market (Rural))