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Physical Sciences and Mathematics Commons™
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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Tomography Of The Darcy Velocity From Self-Potential Measurements, A. Jardani, A. Revil, A. Bolève, A. Crespy, J.-P. Dupont, W. Barrash, Bwalya Malama
Tomography Of The Darcy Velocity From Self-Potential Measurements, A. Jardani, A. Revil, A. Bolève, A. Crespy, J.-P. Dupont, W. Barrash, Bwalya Malama
Natural Resources Management and Environmental Sciences
An algorithm is developed to interpret self-potential (SP) data in terms of distribution of Darcy velocity of the ground water. The model is based on the proportionality existing between the streaming current density and the Darcy velocity. Because the inverse problem of current density determination from SP data is underdetermined, we use Tikhonov regularization with a smoothness constraint based on the differential Laplacian operator and a prior model. The regularization parameter is determined by the L-shape method. The distribution of the Darcy velocity depends on the localization and number of non-polarizing electrodes and information relative to the distribution of the …
Quantifying Fire Behavior Versus Societal Benefits Of Southern California Shrublands And Grasslands, Christopher Dicus, Maurica A. Zimmerman
Quantifying Fire Behavior Versus Societal Benefits Of Southern California Shrublands And Grasslands, Christopher Dicus, Maurica A. Zimmerman
Natural Resources Management and Environmental Sciences
Urban sprawl in southern California perpetually threatens native shrublands and grasslands, which intrinsically provide both biophysical and socioeconomic benefits to society. However, these vegetation types are simultaneously prone to high-intensity wildfires that lead to enormous damage to human interests. After the southern California firestorms of October 2003, new regulations were adopted that increased the mandatory vegetation clearance around structures in order to reduce fire risk, which may significantly impact the positive benefits that grasslands and shrublands provide. To address this apparent conflict, we investigated the tradeoffs between societal benefits derived from major shrubland, grassland, and woodland vegetation types in southern …
Kennedy Meadows Community Wildfire Protection Plan, Kenneth Delfino, Christopher Dicus
Kennedy Meadows Community Wildfire Protection Plan, Kenneth Delfino, Christopher Dicus
Natural Resources Management and Environmental Sciences
No abstract provided.
Watershed Analysis Results For Mendocino Redwood Company Lands In Coastal Mendocino And Sonoma Counties, Christopher G. Surfleet
Watershed Analysis Results For Mendocino Redwood Company Lands In Coastal Mendocino And Sonoma Counties, Christopher G. Surfleet
Natural Resources Management and Environmental Sciences
To assess the needs for conservation, restoration and condition of aquatic habitat within its land Mendocino Redwood Company (MRC) has been conducting watershed analysis. From watershed analysis completed to date, we estimate 73percent of the total sediment inputs over the last 30 to 40 years are road and skid trail associated. Of that percentage 30 percent is road and skid trail associated mass wasting, and 32 percent is road surface and point source erosion, the remaining 11percent is surface and point source erosion from skid trails. Hillslope mass wasting (not associated with roads or skid trails) represents 27 percent of …
Extension Of Leakage Theory To Unconfirmed Aquifer Flow, B Malama, K L Kuhlman, W Barrash
Extension Of Leakage Theory To Unconfirmed Aquifer Flow, B Malama, K L Kuhlman, W Barrash
Natural Resources Management and Environmental Sciences
No abstract provided.