Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Climate change (2)
- SWAT (2)
- Bioenergy (1)
- Bioenergy crops (1)
- Biological sciences (1)
-
- Climate variability (1)
- Corn Belt (1)
- Crop growth (1)
- Establishment period (1)
- Fast growing trees (1)
- Geographic information system (1)
- Hybrid hydrologic model (1)
- Hydrology (1)
- Hydrology/water quality (1)
- Marginal land (1)
- Marksim (1)
- Midwest (1)
- Next-Generation Weather Radar (1)
- Nutrients (1)
- Soil Conservation Service curve number (1)
- Soil and water assessment tool (1)
- Spatially distributed rainfall-runoff flow simulation (1)
- Suitability (1)
- Surface flow (1)
- Swat (1)
- Tile drainage (1)
- Tile flow (1)
- USA (1)
Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Investigation Of Climate Variability And Climate Change Impacts On Corn Yield In The Eastern Corn Belt, Usa, Ruoyu Wang
Investigation Of Climate Variability And Climate Change Impacts On Corn Yield In The Eastern Corn Belt, Usa, Ruoyu Wang
Open Access Dissertations
The increasing demand for both food and biofuels requires more corn production at global scale. However, current corn yield is not able to meet bio-ethanol demand without jeopardizing food security or intensifying and expanding corn cultivation. An alternative solution is to utilize cellulose and hemi-cellulose from perennial grasses to fulfill the increasing demand for biofuel energy. A watershed level scenario analysis is often applied to figure out a sustainable way to strike the balance between food and fuel demands, and maintain environment integrity. However, a solid modeling application requires a clear understanding of crop responses under various climate stresses. This …
Simulation Of Conservation Practice Effects On Water Quality Under Current And Future Climate Scenarios, Carlington W. Wallace
Simulation Of Conservation Practice Effects On Water Quality Under Current And Future Climate Scenarios, Carlington W. Wallace
Open Access Dissertations
Analysis of the effects of implementing different conservation practices, as well as increased levels of conservation practices under existing and projected future climate, will determine if current conservation practice recommendations will be sufficient to maintain soil and water resources. The Soil and Water Assessment Tool (SWAT) was used to study four watersheds of different sizes (CCW = 680 km2, F34 = 183 km2, AXL = 42 km 2 and ALG = 20 km2) located in Northeastern Indiana. The overarching goal of this study was to evaluate the effect of various agricultural practices on runoff and agricultural chemical losses under current …
Effect Of Bioenergy Crops And Fast Growing Trees On Hydrology And Water Quality In The Little Vermilion River Watershed, Tian Guo
Open Access Dissertations
Energy security and sustainability require a suite of biomass crops, including woody species. Short rotation woody crops (SRWCs) such as Populus have great potential as biofuel feedstocks. Quantifying biomass yields of bioenergy crop and hydrologic and water quality responses to growth is important should it be widely planted in the Midwestern U.S. Subsurface tile drainage systems enable the Midwest area to become highly productive agricultural lands, but also create environmental problems like nitrate-N contamination of the water it drains. The Soil and Water Assessment Tool (SWAT) has been used to model watersheds with tile drainage, but the new tile drainage …
Development And Evaluation Of A Watershed-Scale Hybrid Hydrologic Model, Younghyun Cho
Development And Evaluation Of A Watershed-Scale Hybrid Hydrologic Model, Younghyun Cho
Open Access Dissertations
A watershed-scale hybrid hydrologic model (Distributed-Clark), which is a lumped conceptual and distributed feature model, was developed to predict spatially distributed short- and long-term rainfall runoff generation and routing using relatively simple methodologies and state-of-the-art spatial data in a GIS environment. In Distributed-Clark, spatially distributed excess rainfall estimated with the SCS curve number method and a GIS-based set of separated unit hydrographs (spatially distributed unit hydrograph) are utilized to calculate a direct runoff flow hydrograph, and time-varied SCS CN values and conditional unit hydrograph approach for different runoff depth-based flow convolution are also used to compute long-term rainfall-runoff flow hydrographs. …
Hydrologic And Water Quality Impacts From Perennial Crop Production On Marginal Lands, Qingyu Feng
Hydrologic And Water Quality Impacts From Perennial Crop Production On Marginal Lands, Qingyu Feng
Open Access Dissertations
Marginal lands are proposed as a viable option for producing biofeedstocks as these lands are not heavily engaged in agricultural production or may not be suitable for intensive row-crop food/feed production. However, meeting biofeedstock production goals will require large amount of marginal lands and the unintended consequences of producing biofeedstocks on marginal lands are not fully clear. The overall goal of this study was to evaluate the productivity of biofeedstocks on marginal lands and the potential impacts on hydrologic and water quality processes from the land use conversion.
This study was conducted in the Upper Mississippi River Basin (UMRB). First, …