Wednesday, September 23, 2009

Rio Puerco, NM: BEFORE and AFTER

The furthest downstream restoration site is doing well. Note how the roads have revegetated.
From Rio Puerco Restoration Evaluation - September 2009


The large berm in the background is the "remeander" dam that was built a couple years ago to push the Puerco back into its original channel. In the foreground an In-Stream Willow Planting (ISWP) immediately after it was planted (left) and then after a single growing/flooding season (right). This planting did not incorporate wattles. It has largely washed out as the river channel continued its lateral migration toward river right. A large amount of new erosion is visible along the right side of the channel, which is exactly what this planting tried to prevent. Unfortunately, it is working against the natural migration of the river.
From Rio Puerco Restoration Evaluation - September 2009

The same ISWP, looking upstream. The main channel is now flowing (and cutting) right along the bank. The point bar on the left has widened.

From Rio Puerco Restoration Evaluation - September 2009

These photos show the Guardian's plantings immediately downstream from the bridge. This old channel is now receiving flow because of the remeander. It is a healthy channel with an active floodplain. All of the cottonwoods and willows received overbank flooding from the summer monsoons, and did very well. Its a real jungle down there!

From Rio Puerco Restoration Evaluation - September 2009


These photos show an ISWP on Guardian's State Land. It is the middle of three such ISWPs on State Land. The channel through this reach is downcut and straight, almost like a ditch, and the plantings sought to induce meanders. While the plantings didn't wash out, it doesn't look like the willow are doing very well; in this wet year the bottom of the channel may have been too wet for them. Looking further downstream, one can see sedges growing into the channel, forming a natural meander pattern. Planting sedge plugs may be more effective below bankfull.
From Rio Puerco Restoration Evaluation - September 2009


These photos show the downstream area of the Guardian's State land that was planted in 2008. The ISWP from 2008 is not quite visible under the large cut bank in the center distance. The development and change of the river's channel and associated point bars are visible in the foreground.
From Rio Puerco Restoration Evaluation - September 2009

For more information and more photos, click on one of the photo links above.

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