Use of the Forest

Public use of Saginaw Forest is encouraged. Rules for the public's use include (but are not limited to):

Saturday, June 20, 2009

Sediment transport after large storms

Sediment transport
Originally uploaded by umlud
The creek that flows into Third Sister Lake flows in through a culvert from the property to the southeast. Normally, the creek is dry, but when there is sustained rain, water pours though that culvert and into the creek bed. Likely due to this "flashy" type of discharge, sediment transport through this little creek is quite high.

Last night, there was a major storm that passed over the forest (see video at the end of this post), dumping several inches of rain before passing on some time before 7 AM. I awoke - windows open - to hear what sounded like yet more rain, but it was sunny. Perhaps, then, it was wind in the leaves? No: there was little wind. "Surely," I thought to myself, "it's not the creek?" Going out there, I found that, yes, indeed, it was the creek, carrying a large amount of water and sediment out into the lake, raising the water level of the lake by four or five inches (yes, I waded out into the lake to get a rough estimate of depth on my legs).

Going out at noon, I found that the creek was still running, much diminished. While it was running milk-coffee tan a few hours earlier, it now ran in a watered-down milk white. Still though, after several hours after the rain, the creek's water source had yet to diminish feeding water through the culvert.

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