August 6, 2014 § 2 Comments
The city of Los Angeles is proceeding with demolition of the historic Riverside-Figueroa Bridge over the L.A. River. I’ve been covering this story over at Streetsblog Los Angeles, see today’s article featuring sad photographs showing the bridge being torn up. It makes me sad that this neighborhood-scale bridge is being torn down in favor of a freeway-scale bridge. In this earlier post, I called the project “nothing but zombie engineers fulfilling a now obsolete paean to the automobile.” I don’t think I can outdo that characterization today.
Water is a Living Archive: Examining myths of where various urban streams come from: Pt. 1: Kellogg Creek
July 2, 2014 § 3 Comments
Have you ever heard rumors that water in various urban streams in Los Angeles originates in significant part from irrigation runoff?
It’s true that car wash and irrigation runoff are often seen flowing into storm drains. Dry season (summer) is the time these activities are most likely to take place. In the case of the Los Angeles River, a good deal of the river’s dry season flow comes from point source discharges rather than groundwater: one report says this figure is about 80% (Arup, 2011). Point sources include storm drains which convey irrigation runoff and carwash runoff, but also effluent from wastewater treatment plants. Flow data collected in 2000-2001 by Stein and Ackerman (2007) indicated that on the average, half of dry season flow in the Los Angeles River originated as effluent from wastewater treatment plants and half from storm drains.
As Josh Link puts it, the Los Angeles River, the end of pipe destination for a good deal of imported tap water, is effectively a « Read the rest of this entry »
May 29, 2014 § 1 Comment
Earlier today, Mayor Garcetti announced U.S. Army Corps of Engineers support for Option 20 – the most ambitious of various USACE projects for L.A. River habitat restoration. For more of the story, including some impromptu Lewis MacAdams poetry, see my article today at Streetsblog Los Angeles.
March 19, 2014 § 1 Comment
I am blogging full-time over at Streetsblog L.A., so not posting much here at L.A. Creek Freak (excuses, excuses), but I thought Creek Freaks might like this article I wrote. The city of San Fernando is moving ahead on its 1.6-mile greenway along the Pacoima Wash.
Earlier Creek Freak articles about this include this intro to Pacoima Beautiful’s efforts, and this exploration of San Fernando’s 8th Street Park, which is due to open in the next couple months.
March 15, 2014 § 6 Comments
A couple weeks back, I attended the 2014 GeoDesign Summit at ESRI, in Redlands. I was incredibly inspired by examples of how GIS has been used by people in different fields from all over the country and all over the world to aid in analysis of a wide range of issues. Presentation topics ranged from urban economic development, to vegetation patterns that maximize passage of wildlife, to the layout of services in Latin American favelas.
One of the most memorable talks was the keynote address by Kong Jian Yu, founder of Turenscape.
Yu is a rock star of Landscape Architecture. Most of his firm’s work is in China. My favorite are the wetland landscapes that merge urban form with ecological esthetics. These landscapes have strong visual and experiential component but also are designed to maximize ecosystem services. Central to the provision of ecosystem services in a country where 75% of surface water is polluted, is the cleaning ability of wetlands. Other ecosystem services provided by wetlands include flood control, habitat, photosynthetic output, carbon sequestration, sediment retention and cultural and recreational value. Wetlands are only one component of “ecological infrastructure,” an infrastructure that promises to minimize management intervention while providing this wide range of benefits. Where natural wetlands have been removed, restored or constructed wetlands can still provide some of these services. This is in contrast to built infrastructure projects of the last century, typified by encasing rivers in concrete channels, which are designed to maximize one single thing: transporting stormwater quickly to the ocean.
In China, Yu advocates that ecological security is a matter of national security. Landscape planning is a matter of national defense. Ecological infrastructure must be invested in, developed and maintained.
Over thousands of years, China has struggled with devastation caused by flooding. Like in southern California, China’s flooding issues have been related to population growth, devegetation, and pressure to develop the landscape in a way that compromises its ability to provide flood control.
In his doctoral dissertation work at Harvard, Yu used GIS mapping and analysis to show that despite the country’s recurrent struggles with flooding, that flooding actually only affects 2.2% of China’s surface area. If flooding only takes up 2.2% of the land, then is it possible to simply “make friends with floods” and accept the fact of flooding? One could simply reserve these zones for flooding, develop elsewhere, and not have to worry about flood damage anymore.
Yu made it sound so simple. Though comments from the audience acknowledged the perils of the top-down style of planning that occurs in China, I was still inspired by Yu’s ideal of how ecological infrastructure can integrate science-based approaches to land management with a new esthetic that embodies ecological values.
What would an ecological esthetic look like in Southern California? Our plants and seasonal cycles are charismatic– but in a subtle way. Our esthetic might be about how shades of rust and silver transform into various shades of green after the winter rains. Or how every rainy season tells a different story, and how that story is told through the composition of wildflowers we see in the spring as well as in the way water chooses its own path through the alluvial plains. How can southern California make friends with floods?
February 28, 2014 § 3 Comments
I just posted an article at L.A. Streetsblog that wouldn’t be out of place at L.A. Creek Freak.
It’s the first part of a series where I’ll be exploring the connections between streets and creeks. I’ll be highlighting various green street projects, this article shows off the recently opened Woodman Avenue Multi-Beneficial Stormwater Capture Project – a collaboration of The River Project and the City of Los Angeles.
January 29, 2014 § 7 Comments
Apologies to all our readers for putting up with very very little in the way of near material here at L.A. Creek Freak. Life circumstances took both Jessica and I out of L.A. a couple years ago. We love L.A. and her creeks and streams, but it’s difficult to keep in touch with them from afar.
I am happy to announce that I am on my way back. I’ll be returning to L.A., with my sweet wife and my 6-month old daughter, and, as of mid-February, writing full-time for L.A. Streetsblog. Streetsblog focuses on walking, bicycling, and transit issues in Southern California. When Jessica Hall and I were first starting L.A. Creek Freak, back in 2008, we discussed wanting LACF to do for water issues what LASB does for transportation issues.
I am looking forward to including a fair amount of L.A. River coverage in my Streetsblog writing. Creekfreaks may want to check out my Streetsblog article yesterday musing on how city park and transportation departments might work together better to extend L.A.’s greenway facilities including the L.A. River bike path. « Read the rest of this entry »