Climate change due to anthropogenic greenhouse gases (GHG) is expected to have important impacts on water resources, with a variety of societal impacts. Recent research has shown that applying different methodologies to assess hydrologic impacts can lead to widely diverging projections of water resources. The authors classify methods of projecting hydrologic impacts of climate change into those...

Within the rhizosphere, AM fungi are a sensitive variable to changes of botanic and environmental conditions, and they may interact with the biomass of plant and other microbes. During the vegetative period of the Phragmites australis growing in the Sun Island Wetland (SIW), the variations of AM fungi colonization were studied. Root samples of three hydrologic gradients generally showed AM fung...

Currently, the river forecasting system deployed in each of 13 River Forecast Centers of the National Weather Service primarily uses lumped parameter models to generate hydrologic simulations. With the deployment of the weather surveillance radar 1988 Doppler radars, more and more precipitation data with high spatial and temporal resolution have become available for hydrologic modeling. Hydrolo...

Budyko (1974) postulated that long-term catchment water balance is controlled to first order by the available water and energy. This leads to the interesting question of how do landscape characteristics (soils, geology, vegetation) and climate properties (precipitation, potential evaporation, number of wet and dry days) interact at the catchment scale to produce such a simple and predictable ou...

The temptation to include model parameters and high resolution input data together with the availability of powerful optimization and uncertainty analysis algorithms has significantly enhanced the complexity of hydrologic and water quality modeling. However, the ability to take advantage of sophisticated models is hindered in those models that need a large number of input files, such as the Soi...

16 Journal of Forestry • September 2004 organics, and water repellency. The loss or transformation of surface litter and soil organic matter depends on local burn temperatures, which are controlled by such factors as fuel loads, types, and moisture contents, and fire weather. At higher temperatures, much of the mass of organic matter can be transformed into carbon dioxide and water vapor, with ...

Stable isotopes are often utilized as intrinsic tracers to study the effects of human land uses on the structural and functional characteristics of ecosystems. Here, we illustrate how stable isotopes of H, C, and O have been utilized to document changes in ecosystem structure and function using a case study from a subtropical savanna ecosystem. Specifically, we demonstrate that: (1) delta 13C v...

References a, I., et a& “The Variation of Deuterium Content of Natural rs in tho Hydrologic Cycle. ’ Res. cys., 2, 177 (1964). G? M., “Production of Heavy *.’, McGraw Hill Book Co. Inc., Pork, N.Y. (1955). . L., “Special Uses for Water med from Sewage. Proc. 21st 1 Meeting, Soil Conservation Soe. ier. (1966). ., “The Use of Oxygen-18 and ium Concentrations in the WU&lance of Lakes.” Water Bc: R...