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Articles 1 - 20 of 20
Full-Text Articles in Environmental Sciences
Effects Of Silvicultural Management On Coast Redwood Forest Composition, Density And Structure In Santa Cruz And San Mateo Counties, Michael J. Papa
Effects Of Silvicultural Management On Coast Redwood Forest Composition, Density And Structure In Santa Cruz And San Mateo Counties, Michael J. Papa
Master's Theses
The multiple-objective exploratory study investigates effects of various silvicultural management regimes commonly applied to coast redwood (Sequoia sempervirens [D. Don] Endl.) forests in Santa Cruz and San Mateo Counties, California, USA. A temporary forest inventory was installed in 24 harvest origin stands and 4 natural origin stands throughout the study area (sample area = 1189 acres). Data from the systematic sample of 233 one-quarter acre nested cluster plots (sample intensity = 4.9%) rendered overall forest descriptions in terms of species composition, density, and structure. The common forestry measures of trees per acre (TPA), basal area per acre (BA), and …
Communication Of Recycling Through Labeling And Packaging, Serena Mistry
Communication Of Recycling Through Labeling And Packaging, Serena Mistry
Graphic Communication
Recycling has become a more prevalent practice in the last few decades. However, the labeling system on today’s packaging is not always clear in indicating whether something is recyclable. Recently, there has been a great deal of attention directed at a new system, known as the How2Recycle label, an innovative labeling system expected to launch in the next few years. As the population continues to grow at unprecedented levels and more strain is placed on the global environment, recycling becomes more crucial. In the United States, the lack of a standard system for recycling on labeling and packaging deters people …
Mortality Assessment Of Redwood And Mixed Conifer Forest Types In Santa Cruz County Following Wildfire, Steve R. Auten
Mortality Assessment Of Redwood And Mixed Conifer Forest Types In Santa Cruz County Following Wildfire, Steve R. Auten
Master's Theses
On August 12, 2009, the Lockheed Fire ignited the west slope of the Santa Cruz Mountains burning approximately 7,819 acres. Foresters and other land managers were left with challenging decisions on how to evaluate tree mortality. Big Creek Lumber Company, California Polytechnic State University, San Luis Obispo (Cal Poly)’s Swanton Pacific Ranch (SPR), and other resource professionals familiar with this region teamed up to develop a method for evaluating damage and thereby mortality for redwood, California nutmeg, live oak, tanoak, California bay, Pacific madrone, big leaf maple, Douglas-fir, Monterey pine, and knobcone pine. Quantitative damage criteria were used to design …
Climate Change And The Spread Of Vector-Borne Infectious Diseases, Courtney B. Reed
Climate Change And The Spread Of Vector-Borne Infectious Diseases, Courtney B. Reed
Social Sciences
No abstract provided.
Climate Change And The Water Crisis In Israel, Lauren Deutsch
Climate Change And The Water Crisis In Israel, Lauren Deutsch
Natural Resources Management and Environmental Sciences
Israel’s water crisis is controlled by the availability and location of water resources that are affected by climate change and geopolitics in southwest Asia. Conflict between Israel and the Palestinian occupied territories in the Gaza Strip and the West Bank have put strains on the allocation of water recourses. The goal of this research was to model how much a change in climate will affect the amount of available freshwater in Israel. Intensive research taken from Israel and the occupied territories was carried out to understand how the amount of precipitation, rainfall, and the rate of evaporation is affected by …
Quantifying The Regional Water Footprint Of Biofuel Production By Incorporating Hydrologic Modeling, M. Wu, Y. Chiu, Y. Demissie
Quantifying The Regional Water Footprint Of Biofuel Production By Incorporating Hydrologic Modeling, M. Wu, Y. Chiu, Y. Demissie
Natural Resources Management and Environmental Sciences
A spatially explicit life cycle water analysis framework is proposed, in which a standardized water footprint methodology is coupled with hydrologic modeling to assess blue water, green water (rainfall), and agricultural grey water discharge in the production of biofuel feedstock at county-level resolution. Grey water is simulated via SWAT, a watershed model. Evapotranspiration (ET) estimates generated with the Penman-Monteith equation and crop parameters were verified by using remote sensing results, a satellite-imagery-derived data set, and other field measurements. Crop irrigation survey data are used to corroborate the estimate of irrigation ET. An application of the concept is presented in a …
Selection Of Hydrologic Modeling Approaches For Climate Change Assessment: A Comparison Of Model Scale And Structures, Christopher G. Surfleet, Desirèe Tullos, Heejun Chang, Il-Won Jung
Selection Of Hydrologic Modeling Approaches For Climate Change Assessment: A Comparison Of Model Scale And Structures, Christopher G. Surfleet, Desirèe Tullos, Heejun Chang, Il-Won Jung
Natural Resources Management and Environmental Sciences
A wide variety of approaches to hydrologic (rainfall–runoff) modeling of river basins confounds our ability to select, develop, and interpret models, particularly in the evaluation of prediction uncertainty associated with climate change assessment. To inform the model selection process, we characterized and compared three structurally-distinct approaches and spatial scales of parameterization to modeling catchment hydrology: a large-scale approach (using the VIC model; 671,000 km2 area), a basin-scale approach (using the PRMS model; 29,700 km2 area), and a site-specific approach (the GSFLOW model; 4700 km2 area) forced by the same future climate estimates. For each approach, we present …
The Abundance And Distribution Of Gelatinous Zooplankton In The San Francisco Estuary, Amalia Borson, Lindsay Sullivan, Wim Kimmerer
The Abundance And Distribution Of Gelatinous Zooplankton In The San Francisco Estuary, Amalia Borson, Lindsay Sullivan, Wim Kimmerer
STAR Program Research Presentations
Until recently, gelatinous zooplankton were not considered important components of the San Francisco Estuary (SFE) foodweb. However, anecdotal evidence, ongoing research, and a few published reports and papers suggest an increase in their abundance over the last 10 to 20 years. Of particular interests are three species of introduced hydromedusae (Blackfordia virginica, Maeotias marginata, and Moerisia lyonsi). All three inhabit the fresh to brackish regions of the estuary, including Suisun Bay, the channels of Suisun Marsh, and the western Sacramento-San Joaquin Delta, and are seasonally abundant throughout late summer and fall. As a result, they overlap …
Uncertainty In Hydrologic Modelling For Estimating Hydrologic Response Due To Climate Change (Santiam River, Oregon), Christopher G. Surfleet, Desirée Tullos
Uncertainty In Hydrologic Modelling For Estimating Hydrologic Response Due To Climate Change (Santiam River, Oregon), Christopher G. Surfleet, Desirée Tullos
Natural Resources Management and Environmental Sciences
This paper explores the predicted hydrologic responses associated with the compounded error of cascading global circulation model (GCM) uncertainty through hydrologic model uncertainty due to climate change. A coupled groundwater and surface water flow model (GSFLOW) was used within the differential evolution adaptive metropolis (DREAM) uncertainty approach and combined with eight GCMs to investigate uncertainties in hydrologic predictions for three subbasins of varying hydrogeology within the Santiam River basin in Oregon, USA. Predictions of future hydrology in the Santiam River include increases in runoff in the fall and winter months and decreases in runoff for the spring and summer months. …
Leds And Astronomy, Britny N. Delp, Stephen M. Pompea
Leds And Astronomy, Britny N. Delp, Stephen M. Pompea
STAR Program Research Presentations
Using a Czerny-Turner spectrometer, 45 different types of outdoor lights were categorized. These spectra were used to determine how useful the light is to human eyes and how dark skies friendly these lights are. Dark skies friendly lighting means that little to no light shines above a right angle to the light, and should emit as little as possible below 500nm (green) wavelengths. The short wavelengths present a problem to astronomers in the form of Rayleigh scattering. The following criterion were used in selecting the best source for urban and rural lighting: color rendition measured by color rendering index (CRI), …
Assessing County-Level Water Footprints Of Different Cellulosic- Biofuel Feedstock Pathways, Yi-Wen Chiu, May Wu
Assessing County-Level Water Footprints Of Different Cellulosic- Biofuel Feedstock Pathways, Yi-Wen Chiu, May Wu
Natural Resources Management and Environmental Sciences
While agricultural residue is considered as a near-term feedstock option for cellulosic biofuels, its sustainability must be evaluated by taking water into account. This study aims to analyze the county-level water footprint for four biofuel pathways in the United States, including bioethanol generated from corn grain, stover, wheat straw, and biodiesel from soybean. The county-level blue water footprint of ethanol from corn grain, stover, and wheat straw shows extremely wide variances with a national average of 31, 132, and 139 L of water per liter biofuel (Lw/Lbf), and standard deviation of 133, 323, and 297 L …
Nuclear Waste Policy Act: Where We've Been And Where We're Headed, Kevin Flournoy
Nuclear Waste Policy Act: Where We've Been And Where We're Headed, Kevin Flournoy
Physics
The Nuclear Waste Policy Act is analysed in its practical and political impact. A policy recommendation is made of greater state and regional autonomy of on-site waste storage.
The Effects Of Biochar Age And Concentration On Soil Retention Of Phosphorus And Infiltration Rate, Emilie Schneider
The Effects Of Biochar Age And Concentration On Soil Retention Of Phosphorus And Infiltration Rate, Emilie Schneider
Natural Resources Management and Environmental Sciences
Changes in land use and land management practices are regarded as one of the main factors in altering the hydrogeological system, causing changes in runoff, surface supply yields, and the quality of receiving water (Tong and Chen, 2002). Phosphorus is a significant contributor to accelerated eutrophication of fresh water and is largely sourced from agricultural runoff (Sharpley et al., 1994). The dominant processes controlling solution composition in agricultural soils are primarily ‘chemical’ for P (i.e. adsorption/desorption and dissolution/precipitation) (Edwards and Withers, 1998). Biochar has chemical characteristics that have the potential to adsorb P or influence precipitation of P insoluble pools …
A Study Of Enhanced De-Chlorination And Bio-Remediation: Molasses Injections Into Groundwater, Brent Anderson
A Study Of Enhanced De-Chlorination And Bio-Remediation: Molasses Injections Into Groundwater, Brent Anderson
Natural Resources Management and Environmental Sciences
No abstract provided.
The Invasion Of California Grasslands: Past, Present, And Future Implications, Danielle Simone Caziarc
The Invasion Of California Grasslands: Past, Present, And Future Implications, Danielle Simone Caziarc
Social Sciences
No abstract provided.
Reducing The Enviromental Impact Of Horse Keeping, Amanda R. Shere
Reducing The Enviromental Impact Of Horse Keeping, Amanda R. Shere
Social Sciences
No abstract provided.
An Education On Growing Water Scarcity And The Benefits Of Domestic Greywater Recycling Systems, Patricia Cates
An Education On Growing Water Scarcity And The Benefits Of Domestic Greywater Recycling Systems, Patricia Cates
Natural Resources Management and Environmental Sciences
Water scarcity is becoming an ever growing concern in the world today. Fresh potable water is a natural resource which is being used more rapidly than it is being replenished. A growing global population, agriculture, and industry have placed great demands on our water resources. There is a need to help conserve our planet’s fresh water reserves. A tremendous percentage of household drinking water in the United States is currently being used to flush toilets, water yards and wash laundry or dishes. A practice termed ‘greywater recycling’ allows a person to utilize slightly used water to irrigate landscapes and flush …
First Record Of Serropalpus Substriatus Haldeman, 1848 (Coleoptera: Melandryidae) On Giant Sequoia, Sequoiadendron Giganteum (Lindl.) J. Buchholz (Cupressaceae): New Larval Host, Kim S. Camilli, Joshua D. Soderlund, David Wood, Jim Kral, Douglas D. Piirto
First Record Of Serropalpus Substriatus Haldeman, 1848 (Coleoptera: Melandryidae) On Giant Sequoia, Sequoiadendron Giganteum (Lindl.) J. Buchholz (Cupressaceae): New Larval Host, Kim S. Camilli, Joshua D. Soderlund, David Wood, Jim Kral, Douglas D. Piirto
Natural Resources Management and Environmental Sciences
No abstract provided.
Measuring Ecological Impact Of Water Consumption By Bioethanol Using Life Cycle Impact Assessment, Yi-Wen Chiu, Sangwon Suh, Stephan Pfister, Stefanie Hellweg, Annette Koehler
Measuring Ecological Impact Of Water Consumption By Bioethanol Using Life Cycle Impact Assessment, Yi-Wen Chiu, Sangwon Suh, Stephan Pfister, Stefanie Hellweg, Annette Koehler
Natural Resources Management and Environmental Sciences
Purpose
Though the development of biofuel has attracted numerous studies for quantifying potential water demand applying life cycle thinking, the impacts of biofuel water consumption still remain unknown. In this study, we aimed to quantify ecological impact associated with corn-based bioethanol water consumption in Minnesota in responding to different refinery expansion scenarios by applying a life cycle impact assessment method.
Methods
This ecological damage assessment method for quantifying water consumption impacts was proposed by Pfister et al. in 2009 (Environ Sci Technol 43: 4098–4104, 2009) using an impact characterization factor integrating terrestrial net primary production and precipitation. In …
An Approach To Study The Effect Of Harvest And Wildfire On Watershed Hydrology And Sediment Yield In A Coast Redwood Forest, Christopher G. Surfleet, Arne Skaugset, Brian Dietterick
An Approach To Study The Effect Of Harvest And Wildfire On Watershed Hydrology And Sediment Yield In A Coast Redwood Forest, Christopher G. Surfleet, Arne Skaugset, Brian Dietterick
Natural Resources Management and Environmental Sciences
The Little Creek watershed, within California State Polytechnic University’s Swanton Pacific Ranch, is the location of a paired and nested watershed study to investigate the watershed effects of coast redwood forest management. Streamflow, suspended sediment, and stream turbidity have been collected during storms at two locations on the North Fork Little Creek and at the outlet of South Fork Little Creek from 2002 until present. In 2008, the watershed area between the two monitoring stations on the North Fork Little Creek watershed was harvested with an individual tree selection silvicultural system within the Santa Cruz County Rules of the California …