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Full-Text Articles in Physical Sciences and Mathematics
Analysis Of Soil Change Across Nebraska, Trinity Baker
Analysis Of Soil Change Across Nebraska, Trinity Baker
School of Natural Resources: Dissertations, Theses, and Student Research
The world’s population is growing and an increasing populace requires more resources. These requirements place increasing pressure on the environment and the soil. Soils serve many important functions throughout the world. These functions range from offering a media for food production, providing a sink for organic carbon, nutrient cycling, and improving water quality. It is important to focus on the human impact on soils and their change over time.
For my research I examined how soils across Nebraska have changed over a time period of roughly 65 years. I sampled and analyzed 39 pedons from four Major Land Resource Areas …
Irrigation’S Impact On A Precipitation Event During Grainex In Nebraska, Usa, Daniel Whitesel
Irrigation’S Impact On A Precipitation Event During Grainex In Nebraska, Usa, Daniel Whitesel
School of Natural Resources: Dissertations, Theses, and Student Research
Numerous precipitation events were observed during the Great Plains Irrigation Experiment (GRAINEX). However, the precipitation event that was observed the morning of 23 July 2018 is the focus of this thesis. Six experiments were conducted which involved increasing or decreasing soil moisture by 5% increments over the irrigated cropland. An additional experiment, which changed the irrigated land use to grassland, showed precipitation increases. It was found that regardless of strength of irrigation, average precipitation decreased. Average precipitation decreased by up to 72% when irrigation increased compared to the control simulation and decreased by up to 85% when irrigation decreased compared …
Influence Of Irrigation On Diurnal Mesoscale Circulations: Results From Grainex, C. Phillips, R. Mahmood, R. Pielke Sr.
Influence Of Irrigation On Diurnal Mesoscale Circulations: Results From Grainex, C. Phillips, R. Mahmood, R. Pielke Sr.
School of Natural Resources: Faculty Publications
No abstract provided.
Effects Of Climate And Irrigation On Grace-Based Estimates Of Water Storage Changes In Major Us Aquifers, B. R. Scanlon, A. Rateb, D. R. Pool, W. Sanford, H. Save, A. Sun, D. Long, B. A. Fuchs
Effects Of Climate And Irrigation On Grace-Based Estimates Of Water Storage Changes In Major Us Aquifers, B. R. Scanlon, A. Rateb, D. R. Pool, W. Sanford, H. Save, A. Sun, D. Long, B. A. Fuchs
School of Natural Resources: Faculty Publications
No abstract provided.
Impacts Of Irrigated Agriculture On The Near Surface And Planetary Boundary Layer Atmosphere: Results From The Great Plains Irrigation Experiment (Grainex), Emilee Lachenmeier
Impacts Of Irrigated Agriculture On The Near Surface And Planetary Boundary Layer Atmosphere: Results From The Great Plains Irrigation Experiment (Grainex), Emilee Lachenmeier
School of Natural Resources: Dissertations, Theses, and Student Research
Modification of natural prairie grasslands into irrigated and rainfed agriculture in the Great Plains produced significant impacts on regional weather and climate including temperatures, precipitation, energy fluxes, and the planetary boundary layer (PBL) atmosphere. The Great Plains Irrigation Experiment (GRAINEX) during the 2018 growing season collected data over irrigated and non-irrigated crop fields to further understand these impacts. The data were collected during two intensive observation periods (IOPs) in early June (IOP 1: 30 May – 13 June of 2018) and late July (IOP 2: 16 July – 30 July of 2018). The data analyzed include latent (LE) and sensible …
Irrigation Impacts On Minimum And Maximum Surface Moist Enthalpy In The Central Great Plains Of The Usa, Tianyi Zhang, Rezaul Mahmood, Xiaomao Lin, Roger A. Pielke Sr.
Irrigation Impacts On Minimum And Maximum Surface Moist Enthalpy In The Central Great Plains Of The Usa, Tianyi Zhang, Rezaul Mahmood, Xiaomao Lin, Roger A. Pielke Sr.
School of Natural Resources: Faculty Publications
Agricultural activities notably alter weather and climate including near-surface heat content. However, past research primarily focused on dry bulb temperature without considering the role of water vapor (dew point temperature) on surface air heat content. When using dry bulb temperature trends to assess these changes, for example, not including concurrent trends in absolute humidity can lead to errors in the actual rate of warming or cooling. Here we examined minimum and maximum surface moist enthalpy, which can be expressed as “equivalent temperature.” Using hourly climate data in the Central Great Plains (Nebraska and Kansas) from 1990 to 2014, the averages …
Groundwater Recharge Response To Reduced Irrigation Pumping In Western Nebraska, Justin Philip Gibson
Groundwater Recharge Response To Reduced Irrigation Pumping In Western Nebraska, Justin Philip Gibson
School of Natural Resources: Dissertations, Theses, and Student Research
Given current and continued investment in irrigation scheduling technologies, a need exists to better estimate the longevity and magnitude of water savings at watershed level to avoid the paradox of irrigation efficiency. This paradox occurs within a watershed as not all irrigation inefficiencies lead to the system losing water. For example, irrigation pumping rates in excess of crop water demand may lead to enhanced groundwater recharge or surface runoff that migrates to a stream. Thus, increases in efficiency may not lead to similar magnitudes of water savings. I hypothesize that water savings longevities are short given previous work demonstrating rapid …
Estimation Of Energy Balance Components Over A Drip-Irrigated Olive Orchard Using Thermal And Multispectral Cameras Placed On A Helicopter-Based Unmanned Aerial Vehicle (Uav), Samuel Ortega-Farias, Samuel Ortega-Salazar, Tomas Poblete, Ayse Kilic, Richard Allen, Carlos Poblete-Echeverria, Luis Ahumada-Orellana, Mauricio Zuniga, Daniel Sepulveda
Estimation Of Energy Balance Components Over A Drip-Irrigated Olive Orchard Using Thermal And Multispectral Cameras Placed On A Helicopter-Based Unmanned Aerial Vehicle (Uav), Samuel Ortega-Farias, Samuel Ortega-Salazar, Tomas Poblete, Ayse Kilic, Richard Allen, Carlos Poblete-Echeverria, Luis Ahumada-Orellana, Mauricio Zuniga, Daniel Sepulveda
School of Natural Resources: Faculty Publications
A field experiment was carried out to implement a remote sensing energy balance (RSEB) algorithm for estimating the incoming solar radiation (Rsi), net radiation (Rn), sensible heat flux (H), soil heat flux (G) and latent heat flux (LE) over a drip-irrigated olive (cv. Arbequina) orchard located in the Pencahue Valley, Maule Region, Chile (35◦25'S; 71◦44'W; 90 m above sea level). For this study, a helicopter-based unmanned aerial vehicle (UAV) was equipped with multispectral and infrared thermal cameras to obtain simultaneously the normalized difference vegetation index (NDVI) and surface temperature (Tsurface) at very high resolution (6 cm …
Water Consumption Estimates Of The Biodiesel Process In The Us, Qingshi Tu, Mingming Lu, Y. Jeffrey Yang, Don Scott
Water Consumption Estimates Of The Biodiesel Process In The Us, Qingshi Tu, Mingming Lu, Y. Jeffrey Yang, Don Scott
United States Environmental Protection Agency: Staff Publications
As a renewable alternative to petroleum diesel, biodiesel has been widely used in the US and the world. However, its potential impact on water resources has not been much evaluated. This study investigates water consumption from the biodiesel process, which includes three stages: soybean irrigation, soybean-to-soybean oil processing, and biodiesel manufacturing, at both national and state levels. Mass-based allocation is performed and water consumption at the three stages is obtained on the basis of million gallons per year and gallon water per gallon biodiesel (gal/gal). The normalized water consumption (water intensity) of the irrigation, oil processing, and biodiesel production stages …
Did Irrigation Impact 20th Century Temperature In The High Plains Aquifer Region?, Rezaul Mahmood
Did Irrigation Impact 20th Century Temperature In The High Plains Aquifer Region?, Rezaul Mahmood
School of Natural Resources: Faculty Publications
No abstract provided.
Impacts Of Irrigation On Dry Season Precipitation In India, Rezaul Mahmood
Impacts Of Irrigation On Dry Season Precipitation In India, Rezaul Mahmood
School of Natural Resources: Faculty Publications
No abstract provided.
Impacts Of Irrigation On 20th Century Temperature In The Northern Great Plains, Rezaul Mahmood
Impacts Of Irrigation On 20th Century Temperature In The Northern Great Plains, Rezaul Mahmood
School of Natural Resources: Faculty Publications
No abstract provided.
Irrigation Scheduling Of Soybeans, Corn, Wheat, And Potatoes (Camac Progress Report 87-8), Blaine L. Blad
Irrigation Scheduling Of Soybeans, Corn, Wheat, And Potatoes (Camac Progress Report 87-8), Blaine L. Blad
School of Natural Resources: Faculty Publications
No abstract provided.
A Demonstration And Evaluation Of The Use Of Climate Information To Support Irrigation Scheduling And Other Agricultural Operations (Camac Progress Report 87-4), K. G. Hubbard, D. A. Wilhite, S. J. Meyer, J. Booysen, R. Sagar, J. J. Schmidt, J. R. Hines
A Demonstration And Evaluation Of The Use Of Climate Information To Support Irrigation Scheduling And Other Agricultural Operations (Camac Progress Report 87-4), K. G. Hubbard, D. A. Wilhite, S. J. Meyer, J. Booysen, R. Sagar, J. J. Schmidt, J. R. Hines
School of Natural Resources: Faculty Publications
No abstract provided.
Irrigation Scheduling Of Corn Utilizing Infrared Thermometry, Kirk L. Clawson
Irrigation Scheduling Of Corn Utilizing Infrared Thermometry, Kirk L. Clawson
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Influence Of Irrigation On The Microclimate And Development Of White Mold Disease In Dry Edible Beans, L. E. Hipps
Influence Of Irrigation On The Microclimate And Development Of White Mold Disease In Dry Edible Beans, L. E. Hipps
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.