Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Arsenic (1)
- Aztec (1)
- Castor Lake (1)
- Climate change (1)
- Conquest of Mexico (1)
-
- Diatoms (1)
- Drought (1)
- Earth sciences (1)
- Enviromental Impact (1)
- Environment (1)
- Environmental determinism (1)
- Experiments (1)
- Flow regime. (1)
- GIS (1)
- Geomorphology (1)
- Health and environmental sciences (1)
- History (1)
- Horse Management (1)
- Horses (1)
- Human disease (1)
- Hydrologic Modeling (1)
- Hydrologic variation (1)
- LIDAR (1)
- Landuse (1)
- Manure Management (1)
- Mexica (1)
- NHDPlus (1)
- Northwest arkansas (1)
- Pacific Decadal Oscillation (1)
- Salinity (1)
Articles 1 - 8 of 8
Full-Text Articles in Physical Sciences and Mathematics
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.
Diatoms In Castor Lake (North-Central Washington, Usa) – Proxies Of Climate And Hydrologic Variation, Kelly D. Hollingshead
Diatoms In Castor Lake (North-Central Washington, Usa) – Proxies Of Climate And Hydrologic Variation, Kelly D. Hollingshead
Electronic Thesis and Dissertation Repository
This research provides a high temporal resolution (1 sample / 2-3 years) record of hydrologic variation for the last 2,000 years using a lake sediment record from Castor Lake, a closed-basin system in Washington, USA. The core was dated using 137Cs, 14C, and tephrochronology. Approximately 600 diatoms were identified and enumerated in 198 samples from a Castor Lake freeze core and Livingstone-piston core. A diatom-inference model for salinity was applied to reconstruct fossil diatom salinity. Diatom-inferred salinity for the last century tracked Palmer Drought Severity Index, indicating diatom community composition tracks effective moisture and can be used to …
Hydrologic Modeling To Examine Land Use Change Impacts (1970’S And 2005) On The Sediment Yield And Flow Regime In Cayuga Creek, Niagara County, New York, Kimly Reth
Multidisciplinary Studies Theses
This research aims to assess the water quality and the land use change impacts on sediment concentration and flow regime in Cayuga Creek, Niagara County, NY for two land use periods, 1970’s and 2005. The 1970’s land use, classified by the USGS, had a significant error. Therefore, the scenario of sediment yield and discharge level to land use change is more of a “what if” since the 1970’s land use was classified incorrectly. The Soil and Water Assessment Tool (SWAT)was used to simulate flows and sediment concentrations for the two land use scenarios using the same rainfall data at the …
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.
Spatial Discrepancies Between Nhdplus And Lidar-Derived Stream Networks, Nicole Marie Samu
Spatial Discrepancies Between Nhdplus And Lidar-Derived Stream Networks, Nicole Marie Samu
Masters Theses
Many organizations demand that current water resource issues necessitate improved stream network mapping for more accurate and reliable watershed analysis and modeling results, which can ultimately enable better management and policy decisions. Stream network data from the National Hydrography Dataset Plus (NHDPlus) and derived from Light Detection and Ranging (LIDAR) are each widely accepted to be of superior quality compared to many other conventional datasets. Each dataset indicates potential to improve a wide range of water resource applications; NHDPlus for its high spatial accuracy and functionality, and LIDAR-derived networks for their high resolutions. NHDPlus is publicly available and widely used; …
Arsenic Contamination In Groundwater In Vietnam: An Overview And Analysis Of The Historical, Cultural, Economic, And Political Parameters In The Success Of Various Mitigation Options, Thuy M. Ly
Pomona Senior Theses
Although arsenic is naturally present in the environment, 99% of human exposure to arsenic is through ingestion. Throughout history, arsenic is known as “the king of poisons”; it is mutagenic, carcinogenic, and teratogenic. Even in smaller concentrations, it accumulates in the body and takes decades before any physical symptoms of arsenic poisoning shows. According to the World Health Organization (WHO), the safe concentration of arsenic in drinking water is 10 µg/L. However, this limit is often times ignored until it is decades too late and people begin showing symptoms of having been poisoned.
This is the current situation for Vietnam, …
Role Of Vegetation And Environmental Characteristics On Slope Stability In Northwest Arkansas, Michael Maguigan
Role Of Vegetation And Environmental Characteristics On Slope Stability In Northwest Arkansas, Michael Maguigan
Graduate Theses and Dissertations
Slope failure continues to pose risks to society because knowledge of environmental factors and their interactions are unclear and possibly misunderstood. This misunderstanding leads to generalizations about slope failure susceptibility mapping, despite knowing that slope failures are likely the result of an extensively complex set of interactions among a number of environmental, edaphic, and geomorphic characteristics. Therefore a series of experiments were conducted to investigate the effects of slope, soil texture, vegetation cover, bedrock permeability, and compaction,. A wooden flume with a slope face 1 m wide by 1.5 m long with a 10 cm toe was constructed to contain …
The Environmental And Cultural Effects On The Conquest Of Mexico, Tristan Siegel
The Environmental And Cultural Effects On The Conquest Of Mexico, Tristan Siegel
Senior Projects Spring 2012
In this work I examine the environment and cultural attitudes of Mesoamericans, specifically the Mexica (Atzec), and how these factors played a role in the Conquest of Mexico by Hernan Cortes. I begin by examining Mesoamerican agriculture, lithic technology, and metallurgy. I conclude by examining how these factors played out in the Conquest.