One important planning approach for sustainable living is how to locate and integrate the natural and man-made attributes of the land to configure a low-carbon site for large scale development. Steven Kellenberg's, Urban Land Green article, "Ten Keys to a Low-Carbon Community", http://www.uli.org/ResearchAndPublications/Magazines/UrbanLandGreen.aspx offers an excellent primer on the symbiotic relationship between a variety of planning and design principles that provide measurable solutions for sustainable growth.
Land planners continue to deepened the analytical process of qualifying low-carbon sites through an integrated strategy for sustainable site development called Potential Energy & Renewable Resource Mapping, or PERRM.
PERRM assists property owners identify and document the inherent surface and subsurface resources available on their land to create synergy and an energy efficient infrastructure between the natural and man-made environment to provide an affordable strategy for low carbon development. The goal is to save energy costs for the property owner, the inhabitants and the planet by lowering greenhouse gas emissions and promoting a carbon neutral environment. The objectives are to leverage financial incentives, create steady, ancillary revenue sources and foster entrepreneurial cooperation based on a framework of low carbon development and energy efficiency.
In the past developers often ignored potential energy & renewable resources or left them independent. The data collected by civil and geotechnical engineers was primarily used to identify build /no build areas or close gaps in the traditional infrastructure owned by public utilities. Today, property owners have found PERRM to be valuable for establishing energy usage and efficiency criteria required to for new community development, renewable energy tax credits, revenue negotiations, formation of municipal utility districts, lease strategies, partnering with emerging technology companies, energy legislation and jurisdictional approvals and new federal and state incentive programs,. Also, PERRM is useful to communicate the ‘uniqueness of the land' as a branding opportunity, since the process and results are inherently interesting to the public.
PERRM identifies and explores the potential for integrated strategies between crude oil, natural gas, landfill, wastewater treatment, hydro, solar, wind, geothermal, water wells, rain harvesting, conventional power grids CH&P, desalinization, biomass agriculture, bioremediation and potential for loop optimization to fulfill a variety of outcomes. For instance, a slope analysis study, often used only to identify buildable areas are being reexamined using PERRM as locations for thermal radiation collection based on solar and surface geothermal (GHPs) potential.
PERRM may not make sense everywhere. Scale is important and large properties benefit. Some of the overlapping tasks that need to be performed in a PERRM study include:
PERRM studies ultimately leads to a myriad of new questions and scenarios that need to be solved on a case by case basis. The methodology also involves engaging new disciplines and energy experts to cooperate on this breakthrough process. PERRM creates a new value proposition from how land planning and development has been approached before in order to create a low carbon environment to help us all.