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So, here we’re looking at the upper stretches of the San Diego River drainage. This is the
hillside just north of the river. You can see those well-developed rills, and those
rills are actually migrating upward, basically upslope via headward erosion.
And I’m going to pan down here, and coming into view right there is the main canyon of
the San Diego River.
You can see lots of riparian, water-loving species down there in the bottom. Right now,
you can see where Cedar Creek comes into view and you can see how flat the floor of that
valley is, suggesting that the stream has a pretty high sediment load and it’s depositing
a lot of its bedload there on the floor of an otherwise V-shaped canyon to make a nice
flat-floored valley there.
And then as I continue to pan to the right here we can look downstream in the main San
Diego River drainage.