By David G. Groves
This file provides an fiscal framework for estimating a water agency1s refrained from charges and environmental advantages of accelerating water-use potency. The file demonstrates this framework through comparing the advantages of Denver Water's potency courses and makes use of an exploratory modeling method of accommodate major uncertainty. The research highlights the significance of contemplating either lengthy- and short-run charges and advantages.
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The EB model produces annual estimates of environmental and recreational beneﬁts during the peak and oﬀ-peak seasons for each year in the planning horizon. The EB model for California addresses environmental and recreational SR beneﬁts from the following services: • • • • • recreation at reservoirs habitat in riparian areas and wetlands ﬁsheries supported by river ﬂows habitat supported by suitable salinity levels in the San Francisco Bay-Delta air quality (aﬀected by emissions of air pollutants).
As the program continues, the water savings per audit may drop, resulting in rising marginal costs. 6 understate the marginal costs. ” In such cases, marginal costs would decrease as savings are realized. 8 Water Savings Versus 10-year Total Program Cost for Each of Denver Water’s Proposed Efﬁciency Programs Irrigation efﬁciency 150 Commercial and industrial incentives 80 100 Time-of-sale retroﬁt of toilets, showerheads, and faucets 60 Irrigation checkups 40 Efﬁciency ratings Clothing washers 20 Landscape conversion Xeriscape 0 B A H E C D 0 F G Irrigation education I Conservation education Cooling towers J 500 1,000 Key: A = Car wash certiﬁcates B = Multifamily residential audit program C = Low-ﬂow toilers D = Wireless rainfall sensor rebate E = Public housing retroﬁts F = Conservation kiosks G = Low-ﬂow urinals H = Toilet rebate I = Irrigation meters J = ET controllers 1,500 2,000 PV ($ millions) Total program cost ($ millions) 100 50 0 2,500 Water savings (mgal/year) NOTE: The right y axis indicates the PV of total spending if the program were extend from 2007 to 2050.
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Estimating the Value of Water-Use Efficiency in the Intermountain West by David G. Groves