The Ways of Water

On my way back from the Barrancos I followed the path left by water. This was less a point of curiosity than the easiest way to negotiate broken land. The rivulet began somewhere in the hillocks below the fan before the cliffs.

From there the water wound through low hills.

The water reached more gently sloping ground, where its path was marked by the lack of vegetation. Once in a while, the bottoms was littered with gravel it had recently picked up, but mainly it was a slightly shinier, more level continuation of the banks.

When it reached a more level area where sedimentary gravel covered the ground, it spread wider. Juniper trees grew along both sides.

Below the junipers softer soils appeared. The line was crossed between Tertiary and modern alluvium. Water was no longer able to define a specific course. It spread into a flood plain, leaving areas bare of vegetation. The only clues for where water had flowed were gravel deposits.

The water was flowing generally northeast toward the arroyo when it collided with an ATV trail headed straight for the north end of the cliffs. The water ricocheted back. It was lower than the trail.

From there it ran parallel to the ATV track, preternaturally straight. Its depth varied with soil. When it found something soft, it was deep. One time it was deep, a wash was opening on the other side of the track. At another point the banks were caked with grey mud.

When a particular grass was resistant, it disappeared in the shadows.

When it encountered another channel coming from the southwest, it got lost in another flood plain, until the channel reformed next to the ATV track.

The pattern repeated itself: a straight run, a collision with another water stream, a confused path, rationalization along side the higher road.

Then, a competing channel came through at just a point in the descent where the ATV track was nearly level with my water path. The abutting channel swept across the track, pulling my stream in its wake.

An arroyo feeder formed in the softer soils, twisting and turning around small changes in the earth. Sometimes, one side was steep and the other a delta; it other places the sides were the same. It behaved again like one would expect water to behave.

Just before it reached the arroyo there was a small washout, perhaps formed when water was backup during a storm by stronger currents in the far arroyo.

The feeder entered the far arroyo downstream from where the ATV track began. The water dropped its final load of stones as it changed course when it met the passing waters. From there it flowed towards the Rio Grande.

The Near Arroyo

The near arroyo shows the marks of man even more than the far one.

The road goes over, rather than through it. The local acequia dumps on the river side of the bridge, digging a hole where the water falls. As a result, the one side of the arroyo is more than twice as deep as the other.

Even when it’s not running, the open sections of the ditch that runs back to the Santa Cruz river collect rain water. After Wednesday’s rain, the point where it falls could be seen in the shelf of sand it carved in the bottom.

Three large culverts carry water under the road. They force the water into narrow channels which dig nearly a foot into the soft ground on the upriver side. In the summer, the heat dries the land and the wind smooths the edges, eventually carrying away much of the temporary island.

This arroyo, like the far one, has its sources three or four miles away in the Barrancos badlands that parallel highway 285 that runs from Pojoaque to Española. The rains bring down debris and weeds, especially Russian thistles, that are stopped by the culverts and sometimes block them.

While I think of the arroyo as having two sides, the deep one caused by the acequia and the swallow one carved by the culverts, both acts of man appear on both sides.

Last summer, a lateral was added to the acequia that now dumps just before the bridge on the upstream side. However, with this year’s drought, it hasn’t had a chance to run enough yet to have much impact.

And, on the other side of the bridge, the water leaves the culverts in narrow channels that dig their own paths, especially on the side away from where the acequia dumps. Apparently, the two paths of merge and push the water to the one side.

The erosion caused by the mere existence of the bridge also endangers it. Last year, the local ditch association had to replace the culverts with longer ones and rebuild the concrete faces. At that time, they also added the stone reinforcements.

Note: Top picture is looking towards the badlands on the other side of the Rio Grande and the Jemez. The brown legs in the second and fourth pictures belong to the flume that carries over the ditch water that eventually finds its way to the far arroyo.