Do canals affect land value

Solution 1:

No, they do not. At least, not directly. There are a few considerations to make that can still have en effect; but these effects are near-insignificant.

• A quay slightly raises the ground (compared to a natural decline into the ocean), and allows a zoned building to be built slightly closer to the water's edge. Both of these things will have a positive effect on land value (but again, we're talking about tiny effects).
• Flood barriers don't increase the land value. However, not losing houses in a flood can prevent houses from having to be rebuilt; which means that you don't have to wait for them to level up again. In other words, it keeps your cash flow steadier after a flood (but again, tiny effect).