Sustainable Architecture

Water Quality and Development

2007-09-10T06:38:00.000-07:00

The tap, it could be said, is where the environment meets the house. As the fundamental infrastructure of community (at any scale), water is the first requirement for habitation, prior even to shelter. Drainage is a primary concern of Vitruvius when siting a city. Poor sanitation and water quality was in the West and is now in the developing world the greatest cause of disease; decreases in infant mortality (indeed most mortality rates) due to proper sanitation far exceed mortality decreases due to medical advances. Yet this necessary infrastructure, like power, is typically taken for granted in developed countries.

Within the context of new suburban development, Butler and Karvonen argue for the efficiency of an integrated approach when designing for water supply, sewer, drainage, runoff, and quality (Butler, K.S. and Karvonen, A. Integrative Water managements and Conservation Development: Alternatives for the Central Texas Hill Country. The University of Texas at Austin. December, 2004). Intentionally or not, their report supports organic notions of community development outlined in Melosi, albeit on a much smaller, suburban scale than the urban context the latter frequently cites. This integrated approach is on the one hand necessarily mechanistic, in that it relies on engineered sanitary solutions with distinct components or systems, but it also somewhat biomimetic in its emphasis on the interrelation of those system components.

This is in marked contrast, for example, to legacy urban sanitation systems. For good cause, 20th century sanitary infrastructures treat water supply, drainage and runoff, and sewer as independent systems. But in a justifiable effort to avoid contamination of the water supply, opportunities to lessen the impact of gray water are missed. For example, in a region prone to flash-flooding and with considerable impervious cover concerns, the City of Austin generally does not allow impervious cover credits for rainwater harvesting systems. (This is likely due to the fact that impervious cover limits are in many cases zoning restrictions designed to control scale of development masquerading as water-quality ordinances.) Likewise, expensive detention and retention ponds are not systematically downsized in consideration of bio-retention measures. Outside of designs negotiated ad hoc with City officials, such integrated sanitation strategies are not currently codified in CoA regulations.

In considering infrastructural change, whether an integrated sanitary system or an environmentally-sensitive power distribution system, in most urban settings one inevitably must overcome the considerable inertia of legacy systems. Butler and Karvonen’s report arguably addresses a relatively tractable problem: how best to provide infrastructural water resources to a suburban Greenfield development. Faced with an installed urban infrastructure, however, the problem becomes far less tractable:

“…decisions made about sanitary systems in the nineteenth century had a profound impact on cities more than 100 years later.
“one of [W. Brian] Arthur’s concerns was that a decision will ‘lock in’ an inferior technology path … early decisions on the path affect immediate decisions limiting available … [and] future [options].
“In 1842 … Sir Edwin Chadwick took a bold stand on the need for an arterial system of pressurized water which would place house drainage, main drainage, paving, and street cleaning into a single sanitary process… this remarkable hydraulic system was never implemented …”

—Melosi, The Sanitary City, pp 11-13

How then to circumvent the path dependency of a current infrastructure? Is it best to rely on market forces? Citing the rural electrification of early 20th century America, Nye argues that contrary to popular American notions, such changes can only take place when legislatively mandated. Butler and Karvonen admit as much:

“Individual home owners are typically not able to directly influence the direction of new developments or housing products—to move them towards more sustainable futures in terms of water use and environmental impact.” (Part 1, p 13)

Yet they hesitate to challenge the common perception of the invisible hand as all-wise, with this rather unsubstantiated claim, contradicted somewhat in the paragraph just prior (second passage):

“It is increasingly clear to the public that there can be large differences in the costs of living among communities and individual residences.” (Part 2, p 7)

“developers … all agreed that their successes were not achieved by marketing their projects simply as ‘green developments’ ” (Part 2, p 6)

One is inclined to suspect that American consumers tend to make decisions based on short-term costs rather than long-term value. An integrated, environmental approach to infrastructure may just have to be mandated.

BIM presentation movie

2007-07-11T18:16:00.000-07:00

Nemetschek NA has kindly posted a recording of my presentation I did at the AIA National Convention. You can view it here.

'And', not 'Either/Or'

2007-07-10T21:35:00.000-07:00

I have argued elsewhere that Carter did the sustainability movement a great disservice, even with the best of intentions, when he admonished the American public to turn down the thermostat and put on a sweater. In so doing, he immediately framed the discussion of sustainability as one of choosing between comfort (or quality of life) and survival. The subtext was (and in some quarters still is): either sacrifice and save the world or be comfortable and the planet goes to hell.

But as a designer, my training and experience suggest another context. Design without constraints typically does not lead to stunning results. When designing a building, there are the constraints of site, climate, budget, structure, materials, the end-user's expectations, and even codes and ordinances. While some of those constraints are artificial, and many are inconvenient, in the end the synthetic solution to conflicting constraints is what good design is all about. A professor of mine whom I admire greatly, the late Richard Dodge, used to say, "Architecture is about eating your cake AND having it too."

From an architectural perspective, sustainability as a context for design goes wrong when it becomes the only context for the conversation called, let's design a building. The same holds true when any one constraint — the arbitrary nature of zoning ordinances; the cost of a project; the caprices of an owner or the willfulness of the designer; the dictates of a style police — holds absolute sway and drowns out the other voices in the conversation. The result is can be drab lifeless buildings with PV arrays stapled on.

But when sustainability and the energy a building consumes and generates adds its voice to the chorus, the result is a richer, deeper, more meaningful project. Another dimension has been added to building, another perspective now exists for its interpretation and use, another story has been added to its life and the lives of those inhabiting it. In other words, we become concerned with making our world a better place, and living richer lives in more beautiful places. Not either/or, but and.

Imagination

2007-06-20T14:18:00.000-07:00

In Last Man on the Moon, Gene Cernan writes (page 344):

"Sometimes it seems that Apollo came before its time. President Kennedy reached far into the twenty-first century, grabbed a decade of time and slipped it neatly into the 1960s and 1970s ... after Mercury and Gemini, we should have proceeded to build the shuttle, then an orbiting space station, and only then sought the Moon. As it was, we accomplished the impossible, then started over again. It was as if our young nation had chosen never again to cross the Mississippi River after Lewis and Clark ... "

Roger Launius argues that Kennedy made the Moon a priority for purely geo-political and prestige reasons, not out of a personal conviction. According to Gerard DeGroot, Kennedy said to NASA Administrator James Webb:

"I don't really care about the moon. I know it's important; I know there are people who really want to go there, but I just want to beat the Russians."

That may be shocking to some, but more important than Kennedy's political cynicism is the power of imagination to achieve an impossible goal. Not Kennedy's imagination, but the imagination of the American people and the hundreds of thousand of workers, engineers and scientists who made Apollo possible. What did we get out of Apollo? Among many other things, tangible evidence of the power of imagination. As a designer, I can dig that.

Technology, place and community

2007-06-18T14:15:00.000-07:00

Andrew Light argues convincingly that the foundation of environmentalism is a primary concern for one’s relationship to one’s fellow humans (“The Moral Journey of Environmentalism: From Wilderness to Place,” in Adaptive Design: Tools for Sustainability, Steven A. Moore, editor). That is, the context for concern for the environment is framed in relationships and human community. In the process, he casts serious doubts on the effectiveness if not validity of the experience of environmentalism as being a quasi-spiritual one, to the point of mocking them. I’ll not take issue with his position on Deep Ecology and its adherents. Of greater interest, particularly in the context of the other readings, is the relationship between environmentalism and community.

(Just using the word environmentalism makes my skin creep if not crawl. Light’s chapter helped me see why: the term marginalizes those with concern for our global health and puts them in the ghetto of reactionary discourse. Thankfully that’s changing, but it has seemed that that label hurt the cause of our common future by objectifying its adherents as extremists. I think I’ll stick to sustainability, as clichéd as that’s becoming).

Now let’s look at GIS (geographic information system; it is to geography and planning as CAD is to architecture), a technology that points to a fundamentally phenomenological understanding of place. The methodology of mapping abstract data in layers (or Themes) onto a digital model of geography has interesting implications. The first is that an abstract tabulation of data can capture the qualities of place. This is not so new: homogeneity or equivalency of space is a Cartesian precept that, as Eliade argued, characterizes the modern world-view as distinct from the tribal or primitive. The difference here is that the sheer quantity of data can produce quite nuanced mappings, as TMY2 data tables or information modeling for land development projects can easily attest. GIS implies that with enough layers, enough data, the unique characteristics of a place will be wholly defined. In that regard, it has the potential for objectifying place as being a thing outside one’s self or world. The notion that a place can be contained within a machine, even virtually, may add to that objectification.

Secondly and more profoundly, the very nature of GIS data, both in its collection and tabulation, implies human use. That is, we collect and organize data according to whether it is useful. One could, I suppose, create a sentimental layer in a GIS model, and as in Light’s village, map locales where marriage proposals have taken place, but that is hardly the common usage. Soil alkalinity, prevailing winds, demographic income levels, automotive traffic—these are the types of data we tend to map. There is therefore an inherent relationship of use in GIS.

Third, GIS allows, even excels, at filtering data. Place is not a singular place; it can be seen as topography, or vegetation, or climate, or fauna, or any of hundreds of data types. In fact, to view all data layers in a GIS model is overwhelming and renders it useless. Its power is in its abstraction (much as architectural drawings).

On these three points — homogenous space, data oriented to human use, and data filtering — GIS or more properly the perspective it implies is an inherently objectifying exercise. But go back to Light’s critique of first and second phase environmentalism. The problem with an individualistic basis for an environmental concern is that while it might appear at first blush to be subjective, that is framing the natural world as the subject of our concern, in an odd way it actually objectifies “nature”, as a personal and exclusive experience.

Because of its emphasis on community — at least potentially — the GIS-view allows for the subjective. We rely on data derived from actual experience (the foundation of phenomenology) in order to construct a graspable model of a geographic region. Furthermore, the GIS-view’s relating geography to human use ties human activity, human experience, human community to “nature”. That is not to say that one cannot use GIS to exploit and damage a geographical region. But by deepening our understanding of the relationship between these layers of data, there is a possibility of seeing our relationship to the physical world not as self and other (objective), but self and larger self (subjective). In practical terms, when we invite “nature” to join our human community, or see humans as part of the “natural” community, we improve the quality of life for systems as a whole, and their human and non-human components.

Space Race 2.0

2007-06-03T09:16:00.000-07:00

There's been an increase in the public discussion in the last six months on the establishment of lunar settlements, ever since the 2nd Space Exploration Conference in Houston in December 2006. Gregg Easterbrook wrote an article on NASA's plans for a lunar base for Wired nearly two weeks ago, then was interviewed on NPR, where he repeated some of his assertions and made some new egregious ones. While Mr. Easterbrook's priorities for NASA are only some among many valid possible goals for the agency, he makes incorrect and uninformed statements, unfair characterizations, and I believe misses the significance of manned space exploration. Click here and scroll down and read my comments.

Revisting the Brundtland Report

2007-06-02T06:41:00.000-07:00

The overarching thesis of the 1987 United Nations report, Our Common Future: The World Commission on Environment and Development, could be thus summarized:

“The human misery due to the poverty of the developing world, paired with the excessive consumption of natural resources by the developed world, begets a menagerie of social, economic, and environmental ills, and these in turn beget more human misery.”

The Brundtland report thereby goes far beyond mere critique of resource management in its systematic (and oft-repeated) raising of issues of poverty: lack of proper sanitation, housing, education, nutrition, clean water, and healthcare (“decent human life”). Whereas in the northern hemisphere sustainability is commonly and popularly thought of as the preservation of natural resources, the report puts the problems of third world poverty front and center.

This juxtaposition of overuse of resources on the one hand and dearth on the other is raised again and again: in areas of agriculture, economics, housing, industry, and pollution, to name but a few. Implicit in the contrast is the quite sensible assumption that wealth is the result of abundance. But there are notable instances where that assumption might be undermined, or at least subverted.

It has been argued elsewhere that we have or nearly have reached the state of peak oil: where worldwide oil production, which heretofore has increased, plateaus and begins its inexorable decline. While a scarcity of oil may pose economic problems for both industrial and developing worlds, the decline of this resource is forcing technological and political advances in the energy sector. As a result, the world can look forward to an eventual decline in sulfur and carbon emissions from oil, both directly from reduced consumption, and indirectly due to improved efficiencies. And it is precisely the sort of efficiency improvements occasioned by recent oil market price increases which the World Commission on Environment and Development encourages. In this case, then, the impending dearth of an essential resource will eventually lead to environmental and even economic improvements.

In the case of coal, on the other hand, abundance of this resource is quite problematic. If we are near or at peak oil, we are perhaps two centuries from exhausting coal. Furthermore, coal is far more polluting than oil, with much more elevated levels of sulfur and carbon emissions. One might even imagine synthetic fuels derived from coal becoming economically feasible, not unlike that developed by Standard Oil and I. G. Farber and used by Nazi Germany. It is conceivable that given an abundance of coal, we have a future of greater carbon and sulfur emissions to look forward to.

The question then arises: how are advantageous environmental policies to be implemented when the beneficiaries of resource exploitation are not (at least in the short term) disadvantaged by such undesirable exploitation. If environmental consequences are not immediate, what structures can be implemented to make them so? “The enforcement of common interest often suffers because areas of political jurisdictions and areas of impact do not coincide.” (p. 47). Interestingly, the Lovins article I cited in a previous post picked up on this conundrum ten years after Our Common Future and in detail described the energy problems posed by economic systems in which a building’s developer is generally not its occupant. It appears that another decade on the same problems persist.

The conclusion is inevitable, if unpalatable in the immediate: “… it makes long-term economic sense to pursue environmentally sound policies.” (p. 334). It is precisely the abundance of a useful but noxious resource like coal, which makes the kind of market-driven environmental restrictions of interest. The Kyoto Protocol’s Carbon Credits provide a mechanism whereby the deleterious effects of pollution may be traded like a (negative) commodity, theoretically eventually leading to a reduction of atmospheric greenhouse gases. Hence an abundant but environmentally undesirable resource can be curtailed by being linked to an artificial negative commodity.

This subversion of abundance can lead to true wealth derived through sustainable development. But in order to do so, structural changes must be put in place to penalize consumption and reward conservation of particular resources. The use of market forces to do so is one way in which the call for action by the Brundtland report has been heeded. The alternative may be that “long-term” effects of short-sighted decisions may be just around the corner.

BIM, small sustainable projects, and VectorWorks

2007-05-30T00:59:00.000-07:00

While at the AIA National Convention, I gave presentations of a project of mine at the Nemetschek North America booth. They are the makers of VectorWorks, an outstanding design application for Mac and Windows. A buzzword these day in the practice of architecture (and other building professions) is BIM: building information modeling. Largely seen as a design and documentation methodology rather than a specific technology, BIM allows designers and users to get greater efficiencies out of digital files through the use of data-rich building models. Largely seen as appropriate to large projects with fees to support "left-shift" in the design process, BIM is often ignored by some of VectorWorks' competitors in the context of small projects, at least on trade show floors.

Sustainable design is also often seen as an approach more appropriate to large projects, again where design fees can absorb the requisite additional research and design innovation. Never mind that houses represent about 20% of American energy consumption (see my previous post); energy efficiency in housing is ignored at our peril.

On the other hand, the project of mine that I showed was a single-family residence designed in VectorWorks, using a BIM approach. I've posted a 4.3 MB PDF of the slide show (incidentally entirely built in VectorWorks ARCHITECT with RenderWorks and consisting of "live" drawings, not screen shots). While the slides alone don't do the talk justice, they might be of interest in their own right.

Back from AIA National Convention

2007-05-14T12:15:00.000-07:00

I've recently come back from the AIA National Convention, including Al Gore's Keynote Address. A great deal of interesting material to digest, especially as the theme of the Convention was "beyond green". I'd like to touch on two of the presentations in particular.

Odell, Wilson, and Lazarus delivered a lecture on "Sustainable Design in the Pot-Katrina Era". Their most intriguing suggestion was that "passive survivability" — that is, a building's ability to allow its occupants to survive a disaster for a short or long period of time — was a design objective lying on a continuum with "sustainable design".

Before electricity and before Willis Carrier developed mechanical cooling as we know it today, buildings responded to their climates passively because that was the only possible response. From the dog-trots of the pioneer South and Southeast United States, to the cupola-bearing antebellum plantation houses of Louisiana, to Tewa adobe structures, to the passive cooling wind towers of ancient Persian architecture, humans have built in response to their climate, with great ingenuity, using natural materials at hand. In the last 80 years or so, however, we have become more and more estranged in our architecture from the climatological imperative. I am far from suggesting we pull the plug on mechanical cooling and heating (although I am not a fan — pardon the pun — of forced-air systems). Nevertheless, our current and justifiable preoccupation with climate may bring architecture to a kind of full circle.

Societally, we tend to think of architect-designed buildings as something of a luxury, forgetting that the role of architecture is founded in that basic human need, shelter. Since less than ten per cent of the built environment is designed by architects, that perception is reinforced by a paucity of professional design. Naturally (hopefully?) the lay public understands that large buildings are predominantly architect-designed, but roughly half the energy consumed by buildings (the built environment accounting for 42% of energy consumption in the US) is consumed by residences — and we see examples of lay residential design all around us. Some of it is good; much of it is not. I would argue that thinking of passive survivability is really just another way to consider the role of climate and environment as shape-givers to our buildings. Thinking in those terms as we design (or commission designs) may not only grant our buildings greater efficiency and smaller ecological footprints, but give their users greater satisfaction and joy.

Boecker, Martin and Schaffner (two architects and an engineer), in "Integrated Whole Systems Design: Redesigning the Design Process for High Performance Buildings", presented a model for a collaborative design process involving clients, stakeholders, and design professionals working democratically (my characterization, not theirs). While I didn't find their model ground-breaking by any means, it was refreshing to hear an engineer argue for early-stage collaborative design to a roomful of architects.

One of the model projects they presented involved a developer who was building a school to be leased back to the state (of New Jersey, I believe). They were able to convince their client (the developer) to invest in up-front system efficiencies because the same developer would be the building operator and would be paying utilities. As Lovins points out in his "Institutional Barriers to Energy Efficient Buildings", the problem with the vast majority of buildings is that the developer is rarely the operator; this disincentivizes intelligent (and egoistic) developers from creating energy-efficient buildings. The example used, therefore, was an ideal project, and not a common model for development. Unfortunately when I raised this issue and asked how up-front efficiency investments could be sold to a developer following a traditional development model, I did not receive a satisfactory answer. For a (much) deeper analysis of the inherent problem, read Lovins' article.