This picture shows the beds ready for mulching. For all the other things that mulch does, don't forget that it also stablizes the soil and holds the soil in place. Mulch stops erosion on the spot. However, mulch sold as pine bark nuggetts is light and floats. If there is a water build-up, the pine bark nuggets will float away, and there goes your mulch.
I like pine bark mulch (not nuggets) best as it both stays where you put it, and it also does not set up hard. For daffodils, it's the next best thing to pine straw mulch. Mulch that forms a hard surface over the ground will restrict daffodils foliage from coming up. Even when leaves make a good mulch for many things, on daffodil beds leaves will restrict the foliage. However, if the leaves are chipped or crushed such as happens when run through a lawn mower, they make good daffodil mulch.
When am I going to mulch? When I have time. I'm thinking Thanksgiving weekend, if I can just get the ice off that mulch.
The Water Erosion Prediction Project (WEPP) model is a process-based, distributed parameter, continuous simulation, erosion prediction model for use on personal computers. I found this to be interesting reading, and a source to learn about erosion.
The International Union of Geological Sciences home pages has a good definition of erosion.
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