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Geomorphology, Hydrology and Nutrient Transport in the Tahoe Basin
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The environmental significance of the Tahoe Basin is clearly demonstrated by historic efforts to protect lake and tributary quality through management of naturally diverse watershed ecosystems. The balance between runoff, infiltration, recharge and nutrient transport can be easily shifted through human activities such as forestry, grazing, resource management and watershed development. Subsequent impacts of each activity on source and amount of water and nutrient discharge must be clearly understood if we are to truly reduce nutrient loading, rather than simply re-route the nutrients to an alternate discharge pathway.
Our studies have clearly shown infiltration, runoff, erosion, groundwater recharge, and nutrient transport to be heterogeneous and difficult to predict due to such factors as soil water repellency, preferential flow, soil type, plot condition and vegetative cover. We have most recently examined colloid nutrient transport as a mechanism for the cycling of particle- reactive chemicals that may influence lake and tributary ecology in the Sierra Nevada. Such forms may well represent a previously unrecognized significant source of mobile nutrients in the Sierra Nevada.
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Bowman, D. C., D. A. Devitt, and W. W. Miller. 2006. The effect of moderate salinity on nitrate leaching from bermudagrass turf: A lysimeter study. Water Air And Soil Pollution 175:49-60.
Engle, M. A., M. S. Gustin, D. W. Johnson, J. F. Murphy, W. W. Miller, R. F. Walker, J. Wright, and M. Markee. 2006. Mercury distribution in two Sierran forest and one desert sagebrush steppe ecosystems and the effects of fire. Science Of The Total Environment 367:222-233.
Murphy, J. D., D. W. Johnson, W. W. Miller, R. F. Walker, and R. R. Blank. 2006a. Prescribed fire effects on forest floor and soil nutrients in a Sierra Nevada forest. Soil Science 171:181-199.
Murphy, J. D., D. W. Johnson, W. W. Miller, R. F. Walker, E. F. Carroll, and R. R. Blank. 2006b. Wildfire effects on soil nutrients and leaching in a Tahoe Basin watershed. Journal Of Environmental Quality 35:479-489.
Johnson, D. W., J. F. Murphy, R. B. Susfalk, T. G. Caldwell, W. W. Miller, R. F. Walker, and R. F. Powers. 2005. The effects of wildfire, salvage logging, and post-fire N-fixation on the nutrient budgets of a Sierran forest. Forest Ecology And Management 220:155-165.
Miller, W. W., D. W. Johnson, C. Denton, P. S. J. Verburg, G. L. Dana, and R. F. Walker. 2005. Inconspicuous nutrient laden surface runoff from mature forest Sierran watersheds. Water Air And Soil Pollution 163:3-17.
Rau, B. M., J. C. Chambers, R. R. Blank, and W. W. Miller. 2005. Hydrologic response of a central Nevada Pinyon-juniper woodland to prescribed fire. Rangeland Ecology & Management 58:614-622.
Walker, M. J., R. Kutsch, W. W. Miller, A. Cirelli, and S. Donaldson. 2005. A consistent hoof impact simulator. Soil Science Society Of America Journal 69:257-259.
Caldwell, T. G., D. W. Johnson, W. W. Miller, and R. G. Qualls. 2002. Forest floor carbon and nitrogen losses due to prescription fire. Soil Science Society Of America Journal 66:262-267.
Chen, H. J., R. G. Qualls, and G. C. Miller. 2002. Adaptive responses of Lepidium latifolium to soil flooding: biomass allocation, adventitious rooting, aerenchyma formation and ethylene production. Environmental And Experimental Botany 48:119-128.
Johnson, D. W., R. B. Susfalk, R. A. Dahlgren, T. G. Caldwell, and W. W. Miller. 2001. Nutrient fluxes in a snow-dominated, semi-arid forest: Spatial and temporal patterns. Biogeochemistry 55:219-245.
Bowman, D. C., D. A. Devitt, and W. W. Miller. 2000. The effect of salinity on nitrate leaching from tall fescue turfgrass. Pages 164-178 in Fate And Management Of Turfgrass Chemicals.
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