A Turbulent Life on the Edge of a Continent
Every year a bit of the park slips away
Palisades Park is under constant threat from erosion. Every year some of the Park’s characteristically thin soils and the bluffs on which they grow, slips away, taking plants and trees with it.
Erosion and landslides have historically plague the park's bluffs
Since our earliest historic records, the bluffs on which Palisades Park sits have been crumpling onto the Pacific Coast Highway.
Learn about the Park's GEOLOGY, the formation of marine terraces, local faults zones
and why Palisades Park is naturally prone to landslides, slippages, and erosion.
But you can't blame nature
Today humans leave a large footprint on Palisades Park
BELOW: Photos show park soils that are clearly not healthy and the cause is chiefly manmade.
According to city staff only a few years ago these soils were all covered with new lawns.
Humans leave a large footprint by the sheer number of feet that trod on it's ground. The soils and lawns have been trodden down by by the shere number of tourists, residents, and visitors that enjoy the park.
Some humans leave a lighter footprint and visit the park sustainably, but many others leave a damaging trail and are careless of their impact. Below we hope to explain why we all should understand what is happening and support more sustainable use of the park.
We offer clear solutions which we believe should be implemented immediatly.
Not to address these concerns may have a dire impact not only on the Park's beauty, but also on the the stability of the bluffs.
What healthy soil should look like
A healthy soil profile shows rich texture
“Texture is an important characteristic of soil. It determines how readily water percolates, how easily roots grow, and how much air can move in the spaces between particles.”
From: University of California Press “Introduction to Earth, Soil, and Land” David Carle
Compacted Soils Have Trouble Breathing
If you tread heavily on the soil, if you pound it repeatedly, if you jump and down in the same place, you’ll eventually pound the air out it.
"Soil compaction is the physical consolidation of the soil by an applied force that destroys structure, reduces porosity, limits water and air infiltration, increases resistance to root penetration, and often results in reduced crop yields. "
Compacted soils can cut crop yields by as much as 50% due to reduced aeration...poor internal drainage, and limited availability of plant nutrients."
University of Wisconsin Extension, 2008
Lawn at City Hall has a great soil profile
The lawns in front of City Hall are healthy soils. The depth of the root development, the texture of the soil, and the thick mat of living material show they are thriving. Chemical and gas exchanges move freely between the horizons.
As a result these lawns are wonderfully soft to sit and walk and lie upon. Give it a try!
The soils of Palisades Park are especially susceptible to compaction
Due to heave human impact the turf is dying back from wear and heavy compaction
The California Coastal Commission describes the typical soils of a marine terrace, such as Palisades Park.
The same mechanism that makes the bluffs so erodible, also makes the soils so susceptible to compaction:
"Grains of quartz, feldspur, and mica compressed into layers of sandstone crumble easily.
When wet, shales and sandstone disintegrate, and clays and muds soften and liquefy."
California Coastal Resource Guide, 1987, p 18, California Coastal Commission
Compacted soils are a major cause of erosion
When rain lands on the Park's compacted soils it can't percolate and will run, causing erosion.
Rain flows off the lawn's compacted soils onto the paths, and over the edge of the bluffs.
Every year, even in the recent years of drought, the stairs at Montana or the path at Idaho are closed due to erosion and slides.
Over the years the city has tried to abate the erosion from heavy rains
In 1956, after heavy rains and landslides, the city resorted to core drilling as part of the city's "Slide Prevention Program."
Today city engineers utilize a system of drains and pipes
As necessary as such actions may seem, we have major concerns with an engineering ONLY solution.
For example, why isn't nature recruited into this effort?
Please visit our section on GEOLOGY for more on this subject.
Learn more about the controversy over the current unsustainable use of Palisades Park.