Showing posts with label water. Show all posts
Showing posts with label water. Show all posts

Wednesday, April 29, 2015

The Peat Land


The squatting tree, a landmark on the way to the western flank of the great wetland, is flowing once more. I don't think I need to explain why it has been given this name. It appears to drain the ephemeral waters of the back swale into the great wetland. 


I spot the fluffy white tail of a deer, although nothing more. Probably taken down by coyotes, or scavenged by them, this disembodiment leaves me to reflect on the intimacy of the woods, its sheltering of life and death.



About to cross the once sound, but now quite risky, sawed log, timber beam and pallet bridge. It will need be the first of several woodland structures to be upgraded if we (or any interlopers, coyote included) want to keep crossing with dry feet.


On the other side, more remains.



And nettle, stinging nettle. The western flank of the great wetland is over run with nettle.



It is also a hummocky, low lying peat land of a couple of acres.



I have a general understanding of how peat is formed, but here it is a bit of a mystery. My guess is that it formed when the great wetland was even wetter, covering this flatland at the edge of the slope with water and limiting decomposition of organic matter. As the wetland filled with sediment and organic matter and the water table lowered somewhat, the peat became exposed and the trees and shrubs began taking hold.



Friday, March 13, 2015

Feeling Lucky, Bud?



Above the groundwater ponding in the middle swale (there's two, you see) are rather tall trees, maples and basswood, mostly. I don't think I need to point out that it is still winter, technically anyways, but the maples above the water are budding. Yesterday a great wedge of Canada Geese flew overhead, actually making their way to Canada, on strong southerly winds. Does everything know something I do not? I'm hardly ready for spring, as always I want to hold onto the slow pace of winter for just a bit longer, get some last thing settled before the rush of warm weather busy-ness.



What do you think? I think the maples crazy, but then I saw the very same thing at the ever so slightly warmer Mississippi River yesterday evening. Did I mention there are two months, sixty days, until last freeze? Is this how spring always is in the Big Woods? Probably not. After all, we went from negative eleven degrees last Thursday to over fifty or sixty degrees each day this week! What could be holding the plants back? I can hardly blame the maples for not holding it in, but they may just make a mess of sap season.



In other news, I have been keeping my eyes on the exposed groundwater in the back swale. There is still ice, with plenty of water on top. The frost heaved muck makes for treacherous travel where giant air pockets sit waiting for a boot to suck on. And then there's the duckweed. It's already growing. Yes, a week after subzero temperatures, boom, chlorophyll, CO2 and everything. 



Of course, duckweed, Lemna spp., is a fascinating plant. Not only are there many species, they can be hard to identify. I'm not fanatical about this, but this guy is if you're up for it. All we really need to know is this: duckweed likes still water, sun, and a boatload of nutrients. If you've got duckweed, you got those. What I want to know is from where the nutrient load is coming. Is it inherent to the organic material decaying in the back swale or is it running off from, say (don't mean to gross you out) a few upslope septic systems? Small point, really, and I don't have an answer, may never.



 And finally, the elusive Pileated Woodpecker tap tap tapping away, before the sun came up.



Feeling Out Boundary


For years I have been looking across the wetland, visually leaping from this side to that. I hardly noticed it was a farming plot, hardly recall seeing corn or soy. When visitors see it from the upper floor in the snowy winter, they say how nice it is that we have a view of a lake, which is of course, an illusion. For quite some time I wanted to follow the edge of the wetland, crossing the wide drainage that marks southwestern boundary of our land, and I knew well enough this had to happen in winter. It turns out March is a good time, the soil is deeply frozen, and the air might be fifty degrees.


At the beginning of this great March melt, snow becomes puddles, ground frost begins to let go.



Water is beginning to move. A warmish day, sunshine, and then an attraction to any hint of burbling, the sound of moving water, is the first symptom of spring fever.



Crossing the wide drainage at the southwest corner of our lot where electrical infrastructure meets the woods, marsh grass and cattails meet the scoured land of the gravel mine. This is a boundary I've often met, but never crossed.



Along the western edge of the wetland we find the most Eastern Cottonwood, Populus deltoides. It likes wet feet, and can be found on wetlands, along streams and rivers, on lake edges, and occasionally upland. Large trees with trunks often bending and soft wood, they are prone to break. This is the source of its common name, I think, not the downy white fluff it distributes in late spring.



The wooded hillside slopes sharply, then levels out in a zone that accommodates occasional flooding. I have found that the four-legged and the two-legged creatures like to share paths whether made by us or by them. Here, we walk along a well-trodden deer path, one well-scoped by bow hunters.



As we gain on the farm field, the land rises up just enough to take it out of the soggy soil well-defined by the Cattails, Typha latifolia. Here I see a close resemblance to an oak savanna, a wonderful little spot containing grasses, annual and perennial plants, a large Bur Oak, Quercus macrocarpa (I think) and several smaller ones.



Growing too are large buckthorns with their countless berries. The oaks probably pre-date the buckthorn. New oaks are unlikely to be seeded, sprouted, and survive the shading without the regular fires that give oaks an edge.



Lichens (maybe orange Xanthomendoza weberi and grey-green Physcia aipolia) grow on even the lower oak branches. Rampant buckthorn growth will shade out the lichen too. I have to start seeing the positives of buckthorn, what were they again?



The farm road, which bisects the wetland and forces the drainage through a culvert.


The immaculate, stone free, black earth of the farmed hill to our south. I wonder why cover-cropping is not practiced in this region and have yet to do the research. I suspect that there might not be enough growing season to get soy or corn and sprout a cover before a freeze sets in, but then I am guessing. According to the MCWD, an agency that monitors our watershed, our sub watershed is draining phosphate-laden water to Dutch Lake. This field is near the head of the shed and yet another guess is that it's providing a good part of that input. Residential septic systems and lawn fertilizers are providing the rest. 

My knee-jerk response is to worry that it soon will have homes on it. The owner leases it to a local farmer, and from what I can find, its owner does not live on the property which totals 68 acres of woods, wetlands, and farm fields (other than this one, which is isolated by topography, woods, and wetlands). A quick search shows the owner as Stone Arch Development, but a google search for that shows only a corporation named Stone Arch Organizational Development. Adding more complexity to property ownership, the notion that our own "development" is acceptable, but any future development should be off limits, or at least out of sight. 



At the culvert, water flows in from the big marsh.



And flows out toward the south, draining another few miles of wooded hillsides, residential yards, and horse fields until it reaches Dutch Lake, and ultimately into Minnetonka, overtops into Minnehaha Creek, sent over the falls, then into the Mississippi, and off to a stint in the Gulf of Mexico. 



Turning back to the north we get the only wide open view of the woods within which we live, apart from satellite views. The cropped view highlights the house, toward which I drew an arrow. Witnessing the open, bright marsh and dark woods together is eye opening.