HR: 0800h
AN: H31F-0722    [Abstracts]
TI: The Value of Forest and Pasture to Water Supply in Kona, HI
AU: * Brauman, K A
EM: kbrauman@stanford.edu
AF: Stanford University, Interdisciplinary Program in Environment and Resources, 397 Panama Mall, Stanford, CA 94305-2210, United States
AU: Daily, G C
EM: gdaily@stanford.edu
AF: Stanford University, Biological Sciences, 385 Serra Mall, Stanford, CA 94305-5020, United States
AU: Freyberg, D L
EM: freyberg@stanford.edu
AF: Stanford University, Civil and Environmental Engineering, 380 Panama Mall, Stanford, CA 94305-4020, United States
AB: By quantifying the supply and value of ecosystem services flowing from private land, we can provide a mechanism for sustaining ecosystem services by compensating landowners for their supply. In order for compensation to occur, however, both suppliers and users of ecosystem services require information about the way different land management scenarios will affect ecosystem service flows. This case study in Kona, HI, takes advantage of the direct link between upland water source areas and municipal drinking water users in Kailua-Kona to explore the value of one type of hydrologic service. By quantifying the difference in aquifer recharge under paired forest and pasture sites, we assess the impact of each land-cover type on the volume of water potentially available to municipal water users. We use a water balance approach - measuring rainfall interception and water use by plants, then calculating the balance to be aquifer recharge because of the absence of surface runoff. We aim to integrate these biophysical measurements with information, including costs of pumping, well construction, and land-cover maintenance, provided by the water utility and landowners to ascertain the value of forest and pasture to water supply. By determining the value to water users in Kailua-Kona of the increase or decrease in water quantity that would result from upland land-cover change, we aim both to protect drinking water quantity and to help landowners offset financial pressure to convert their land.
DE: 1813 Eco-hydrology
DE: 1818 Evapotranspiration
DE: 1834 Human impacts
DE: 1876 Water budgets
DE: 1884 Water supply
SC: Hydrology [H]
MN: 2007 Fall Meeting