Hydraulic Engineering Commons^™

Agricultural Water Transfers In The Western United States, Richael Young, Nicholas Brozovic

Daugherty Water for Food Global Institute: Faculty Publications

Irrigation for agricultural production represents the largest consumptive use of water in the western United States. Understanding the ways in which agricultural producers respond to physical and institutional water scarcity is therefore key to managing water risk. One of the important risk management tools available to agricultural producers is the ability to transfer water across space and time. Water transfers range from very informal handshake agreements between neighbors to very formal transfers of real property across large distances with mandatory state and federal reporting. Given the range of potential water transfer mechanisms, there are significant knowledge gaps on the variety, …

2019 Nebraska Water Productivity Report, Mesfin Mekonnen, Christopher Michael Usher Neale, Chittaranjan Ray, Galen E. Erickson, Adam Liska, Haishun Yang, Thiago L. Romanelli, Arjen Y. Hoekstra

Daugherty Water for Food Global Institute: Faculty Publications

Nebraska’s agricultural production is diverse and vast, ranking the state fourth in total value of agricultural products in the U.S. The state is a national leader in terms of agricultural production: it is the third largest producer of corn and second largest in cattle production. Nebraska is also the second largest producer of ethanol and distillers’ grains. The production and use of these three commodities are highly interlinked. Corn is a major input in livestock feed and the ethanol industry. Ethanol plants then produce distillers’ grains as a co-product that is also used as livestock feed, thus forming what the …

Nebraska Water Center Annual Report 2017-2018, The Nebraska Water Center

Nebraska Water Center: Administrative Materials

Contents

Introduction: Foreword • Director’s Letter by Chittaranjan Ray • Nebraska Water Center Overview and Timeline • Nebraska’s Top 10 Water Challenges

Research: Water Sciences Laboratory Overview • Nebraska Vadose Zone Program • Novel Nitrate Leaching Reduction • Ogallala Water Coordinated Agriculture Project (OWCAP) • Nebraska Water Productivity Report • USDA-NIFA Water End-User Grant • U.S. Geological Survey 104b Projects

Extension & Outreach: Bazile Groundwater Management Area • Platte River Basin Ecosystem Symposium • Testing Ag Performance Solutions (TAPS) • 2018 National Institutes for Water Resources Regional Symposium • Water Quality + Citizen Science • Nebraska Water and Natural Resources …

Biomass Density Based Adjustment Of Lidar-Derived Digital Elevation Models: A Machine Learning Approach, Khalid Abdelwahab

Electronic Theses and Dissertations

Salt marshes are valued for providing protective and non-protective ecosystem services. Accurate digital elevation models (DEMs) in salt marshes are crucial for modeling storm surges and determining the initial DEM elevations for modelling marsh evolution. Due to high biomass density, lidar DEMs in coastal wetlands are seldom reliable. In an aim to reduce lidar-derived DEM error, several multilinear regression and random forest models were developed and tested to estimate biomass density in the salt marshes near Saint Marks Lighthouse in Crawfordville, Florida. Between summer of 2017 and spring of 2018, two field trips were conducted to acquire true elevation and …

Urban Runoff And Energy Recovery, Dimitri Porter

Research Opportunities for Engineering Undergraduates (ROEU) Program 2018-19

This project seeks to determine whether microturbines can operate with low flow and low head conditions typically found in urban runoff, and how much power microturbines can generate under these conditions.

Surface Water-Groundwater Interaction Processes For Groundwater Pumping Management In Saigon River Basin, Long Thanh Tran

Chulalongkorn University Theses and Dissertations (Chula ETD)

Since the 1990s, the excessive extraction of groundwater of Saigon River basin is dramatically increased and groundwater resources of Saigon River basin have been facing dramatically drawdown groundwater level in the downstream area. The study attempted to develop groundwater modeling through employing SW-GW interaction parameters and incorporate the concept of sustainable pumping yield to detect optimal pumping management under growing water demand in Saigon River Basin. According to field observed soil moisture, the study recognized the average monthly percolation rate of sand clay loam, sand clay, and clay varies 2-4.5 mm/day, 1.5-3.5 mm/day, and 0.5-2 mm/day, respectively to rainfall intensity …

Pathway Connectivity In An Epigenetic Fluviokarst System: Insight From A Numerical Modelling Study In Kentucky Usa, Ethan Adams

Theses and Dissertations--Civil Engineering

Fluviokarst landscapes are dominated by both fluvial and karst features. Interpreting hydrologic pathways of fluviokarst can be confounded by the unknown connectivity of the various flow regimes. A combined discrete-continuum (CDC) hybrid numeric model for simulating the surface and subsurface hydrology and hydraulics in fluviokarst basins was formulated to investigate fluviokarst pathways. This model was applied to the Cane Run Royal Springs basin in Kentucky USA. A priori constraints on parameterization were avoided via multi-stage optimization utilizing Sobol sequencing and high performance computing. Modelling results provide evidence of hydrologic pathways dominated by fracture flow, epikarst transfer and runoff. Fractures in …

Implications Of Groundwater Plume Transport And Analysis Of Karst Aquifer Characteristics In Central Florida, Daljit Sandhu

Electronic Theses and Dissertations

Groundwater aquifers make up the primary source of drinking water in Florida. It is imperative to protect and maintain water quality to ensure optimal drinking water conditions. Florida is known for being prone to sinkholes due to karst features. One sinkhole event occurred beneath a phosphogypsum stack, and leaked a large amount of radioactive waste in the Floridan aquifer, raising water quality concerns. To study the behavior of contaminant transport, the radioactive waste plume was modeled by coupling hydraulic and chemistry concepts. Adsorption was studied to see if it can serve as a potential remediation solution to the contaminant waste, …

Field Testing And Simulation Of Vadose-Zone Recharge Wells In The Mississippi River Valley Alluvial Aquifer As An Artificial Recharge Method, Kyungwon Kwak

Electronic Theses and Dissertations

Increasing concerns regarding depletion of groundwater in the Delta region of Mississippi have led to a need to augment natural recharge. Infiltration basins are often one of the simplest means of artificially recharging aquifers. However the Delta has a layer of clay and silt at the surface so it is a better idea to use vadose-zone recharge wells that are not limited by the surficial layer of fine soils. The purpose of this study is to use full-scale field testing to assess the feasibility of using vadose-zone wells for artificial recharge of the Mississippi River Valley alluvial aquifer by using …

Groundwater Transfer And Injection Pilot Project: Construction Of A Three Dimensional Groundwater Flow Model, Wesley Bluvstein

Electronic Theses and Dissertations

The Mississippi River Valley Alluvial Aquifer has experienced substantial groundwater declines in eastern Arkansas and northwest Mississippi due largely to irrigation for rice corn soybeans and other water intensive crops. To alleviate groundwater decline and ensure future sustainability of water resources the U.S. Department of Agriculture has in conjunction with the U.S. Geological Survey and the University of Mississippi initiated studies to determine potential avenues of remediation. Options include improved irrigation efficiency installation of surface weirs inter-basin transfers and groundwater transfer and injection. This study develops a three-dimensional groundwater flow model of a withdrawal well adjacent to a river for …

Evaluating The Effects Of Water Influx On The Mississippi Sound: Current Vs. Historical Relationships, Jarett Lee Bell

Electronic Theses and Dissertations

This research investigated the influence of the opening of the Bonnet Carre Spillway and other fresh water inputs on the Mississippi Sound. The Bonnet Carre Spillway was completed in 1931 and was constructed to protect New Orleans whenever the Mississippi River is at flood stage. The spillway drains into Lake Pontchartrain a brackish-water lagoon north of New Orleans which then drains into Lake Borgne and subsequently into the Mississippi Sound. The inflow of water from the spillway changes the water chemistry of all receiving water bodies and impacts the waters of the Mississippi Gulf Coast. We collected in-situ temperature specific …

Artificial Intelligence In Wet Weather Infrastructure, Matt Hammerstein

Williams Honors College, Honors Research Projects

Effective management of runoff from rain and snowmelt is critical as increased water flows can negatively affect efficiency and reliability at treatment facilities, as well as potentially damage property or the natural environment. Implementation of artificial intelligence for real-time decision making and support in wet weather infrastructure is a recent technological development; as such, a problem has emerged: experience and knowledge of best practices for successful implementation is limited. Artificial intelligence is being employed to inform operational decisions that are intended to improve the efficiency and reliability of physical wet weather infrastructure. The goal of municipalities and utilities in utilizing …

Developing A Calibrated Seepage Meter To Measure Stream-Aquifer Interaction In The Mississippi Delta, Wesley J. Bolton

Electronic Theses and Dissertations

The Mississippi Alluvial Plain (MAP) is a premier region for irrigated agriculture in the United States producing approximately 9 billion dollars in annual revenues. The region receives around 138 cm of precipitation annually; however irrigation is necessary to maximize crop yields as most of the precipitation does not occur during the growing season. There are 8 million irrigated acres within the Mississippi Alluvial Plain. The source of most of the irrigated water is the surficial aquifer in the Mississippi Embayment the Mississippi River Valley Alluvial Aquifer (MRVAA) and due to the reliance on irrigation for maximum crop yields recent potentiometric …

Flood Inundation Mapping For Huron Creek, Houghton County, Michigan, Sarah Washko

Dissertations, Master's Theses and Master's Reports

The 2018 Father’s Day Flood rattled the Houghton County, MI community. Thousands of dollars in damage to public and private property were incurred due to slope failure, scour and stagnant water. Though the flood was billed as a once-in-a-lifetime event, hazard mitigation planning has become essential, as extreme weather events are expected to become more frequent with a changing climate. While Federal Emergency Management Agency funding will provide detailed flood hazard maps in the future, mapping is expected to be several years out. To aid the City of Houghton community with immediate flood hazard mitigation planning, a hydraulic-based flood depth …

Hydroclimate Drivers And Atmospheric Dynamics Of Floods, Nasser Najibi

Dissertations and Theses

Our preliminary survey showed that most of the recent flood-related studies did not formally explain the physical mechanisms of long-duration and large-peak flood events that can evoke substantial damages to properties and infrastructure systems. These studies also fell short of fully assessing the interactions of coupled ocean-atmosphere and land dynamics which are capable of forcing substantial changes to the flood attributes by governing the exceeding surface flow regimes and moisture source-sink relationships at the spatiotemporal scales important for risk management. This dissertation advances the understanding of the variability in flood duration, peak, volume, and timing at the regional to the …

Technology For Integrated Groyne-Vetiver Erosion Reduction (Tiger): Case Study In A West African River, Chase M. West

Dissertations, Master's Theses and Master's Reports

River erosion is a problem all over the world. The effects of river erosion are especially hard for farmers in developing countries, where the river is an important part of their farming practices and daily lives. A case study was done in the small village of Fode Binea in Senegal, West Africa to reduce this stream erosion. A new hybrid approach, Technology for Integrated Groyne-Vetiver Erosion Reduction (TIGER) method, was developed. The method includes combining groynes at the toe of the riverbank to reduce toe erosion in the channel and planting a buffer strip with vetiver grass to reduce erosion …

Impacts And Adaptive Measures For Groundwater Use In The Mekong Delta. Case Study : Tra Vinh Province, Tuan Pham Van

Chulalongkorn University Theses and Dissertations (Chula ETD)

Because of the rapid growth of population and fast economic development in the Vietnamese Mekong Delta (VMD), the surface water resources are unable to meet these demands and groundwater is also over-abstracted. Groundwater depletion and saline water intrusion become the main problems that threaten drinking water supplies, farming systems, and livelihoods in the delta, especially coastal areas. It is necessary to provide a fully comprehensive picture of groundwater use (GWU) and its impact issues In Tra Vinh Province, a coastal province of VMD, dependency on GW increases from north to south which has a strong relation with availability of freshwater …

การสะท้อนและการส่งผ่านคลื่นของเขื่อนกันคลื่นแบบไม่เต็มส่วน, นันทวุฒิ อินทรียงค์

Chulalongkorn University Theses and Dissertations (Chula ETD)

ปัญหากัดเซาะชายฝั่งในประเทศไทยมีความรุนแรงอย่างมากในปัจจุบัน โดยเฉพาะอย่างยิ่งในบริเวณอ่าวไทยตอนบน ที่ซึ่งมีลักษณะเป็นหาดโคลน มีเพียงโครงสร้างที่สามารถส่งถ่ายน้ำหนักและแรงลงสู่ชั้นดินที่ลึกลงไปเท่านั้นที่สามารถสร้างในพื้นที่โคลนนี้ได้ การใช้โครงสร้างเสาเข็มปักลงในดินและมีชิ้นส่วนลักษณะคล้ายกำแพงในบริเวณผิวน้ำ โดยขอนิยามว่า “เขื่อนกันคลื่นแบบไม่เต็มส่วน” อาจเป็นตัวเลือกที่เหมาะสมในการป้องกันพื้นที่ที่มีลักษณะเป็นฐานรากอ่อน อย่างไรก็ตามประสิทธิภาพการทำงานของเขื่อนกันคลื่นแบบไม่เต็มส่วนยังไม่ได้รับการพิสูจน์ จึงเป็นเหตุให้การศึกษานี้มีวัตถุประสงค์เพื่อศึกษาความสัมพันธ์ระหว่างคุณสมบัติคลื่นและลักษณะทางกายภาพของโครงสร้าง กับความสามารถในการสะท้อนและการส่งผ่านคลื่น แบบจำลองทางกายภาพ 2 มิติถูกพัฒนาในอ่างจำลองคลื่น ภายใต้เงื่อนไขคลื่นสม่ำเสมอที่ถูกสร้างจากเครื่องกำเนิดคลื่นด้วยความชันคลื่น (Hi/L) ในช่วง 0.010 – 0.025 แบบจำลองเขื่อนกันคลื่นถูกสร้างจากเหล็กกล่องด้วยการเปลี่ยนแปลงความลึกการจมจาก 0.075 – 0.300 เมตร และช่องว่างระหว่างเสาเปลี่ยนแปลงจาก 0.5 – 1.5 เมตร ระดับน้ำนิ่งและความหนาของเขื่อนกันคลื่นทีค่าคงที่เท่ากับ 0.45 และ 0.0375 เมตร ตามลำดับ การทดลอง 120 กรณีถูกดำเนินการโดยมีวัดขนาดของความสูงคลื่นด้านหน้าและหลังโครงสร้าง แล้วคำนวณค่าสัมประสิทธิ์การสะท้อนและการส่งผ่านคลื่น จากผลการศึกษาแสดงให้เห็นว่า ค่าสัมประสิทธิ์การสะท้อนและการส่งผ่านคลื่นมีความสัมพันธ์กับความหนาโครงสร้างสัมพัทธ์ (b/L), ความลึกโครงสร้างสัมพัทธ์(D/d), ปัจจัยความไม่เต็มส่วนของเขื่อนกันคลื่น​, ความลึกสัมพัทธ์ (d/L), ความสูงคลื่นสัมพัทธ์ (Hi/d) และความชันคลื่น (Hi/L) ค่าสัมประสิทธิ์การสะท้อนของคลื่นมีค่าลดลงอย่างเอกซ์โพเนนเชียลเมื่อ b/L, d/L, Hi/d หรือ Hi/L เพิ่มขึ้น แต่มีค่าเพิ่มขึ้นเมื่อ D/d เพิ่มขึ้น ทั้งในกรณีที่คลื่นล้นและไม่ล้นข้ามโครงสร้าง อีกทั้งเมื่อคลื่นล้นข้ามโครงสร้างจะทำให้ค่าสัมประสิทธิ์การสะท้อนของคลื่นลดลง สำหรับผลลัพธ์ของการส่งผ่านคลื่นพบว่าการส่งผ่านคลื่นมีแนวโน้มที่ลดลงอย่างเอกซ์โพเนนเชียลเมื่อ b/L, d/L, Hi/d หรือ Hi/L เพิ่มขึ้น แต่มีค่าเพิ่มขึ้นเมื่อปัจจัยความไม่เต็มส่วนของเขื่อนกันคลื่นเพิ่มขึ้น ทั้งในกรณีที่คลื่นล้นและไม่ล้นข้ามโครงสร้าง อีกทั้งค่าสัมประสิทธิ์การส่งผ่านยังเพิ่มขึ้นเมื่อคลื่นสามารถล้นข้ามโครงสร้างได้ นอกจากนี้ยังพบว่าการเปลี่ยนแปลงช่องว่างระหว่างเสาไม่มีความแตกต่างอย่างมีนัยสำคัญต่อค่าสัมประสิทธิ์การสะท้อนและการส่งผ่านคลื่น ในการศึกษานี้ได้พัฒนาสมการของสัมประสิทธิ์การสะท้อนและการส่งผ่านคลื่นด้วยวิธีการวิเคราะห์ความถดถอยเชิงซ้อน เพื่อสนับสนุนการออกแบบโครงสร้างในการบรรเทาปัญหากัดเซาะชายฝั่งสำหรับพื้นที่แบบหาดโคลนในอนาคต

Shear Stress Estimates In The Approach And Bridge Section By Using Various Formula, Jun Seon Lee

Graduate Theses, Dissertations, and Problem Reports (ETD)

Shear stress is the resistance force on top of the contact surface caused by moving flow and is one of the important variable in fluid mechanics. Thus, a lot of researches have been conducted to predict accurate value of shear stress. However, calculating shear stress with existing equations has several limitations because only gradually varied flow and/or uniform flow was considered in their studies. Therefore, direct applying those methods into complex flow type, such as around a bridge, to predict shear stress is questionable.

Thus, laboratory experiments were carried out in a laboratory flume to attack the objective of this …

Review Of Water Allocation Models For West Virginia, Madison Lee Alexis Thompson

Graduate Theses, Dissertations, and Problem Reports (ETD)

Modeling river basins started gaining in popularity and usage in the western part of the United States in large part due to its extreme droughts. Planning is necessary to sustain the population, industries, and recreational water use year-round. Water allocation modeling is a tool used to aid in the issues that come from managing water resources. This work considers the continuous models that synthesized the hydrologic processes that occur and provides a simulation of past, current, or future conditions.

West Virginia, located on the eastern side of the United States, does not have an extreme drought problem as seen in …

Preface: Earth Observation For Integrated Water And Basin Management: Challenges For Adaptation To A Changing Environment, María J. Polo, Maria P. González-Dugo, Christopher M.U. Neale

Daugherty Water for Food Global Institute: Faculty Publications

Integrated river basin management involves a sound knowledge of water and land interactions, and impacts from and feedbacks to human activity. Remote sensing has been an efficient and increasingly promising means of gathering direct information of the Earth surface, as well as information on water and energy fluxes. The recent generation of high-resolution sensors offers a huge potential for monitoring, assessing, and modelling our changing environment in a context of uncertainty about how future climate conditions will affect the current water resource and basin management framework. Moreover, large amounts of data are now available posing a challenging opportunity to the …

Riverbank Filtration Impacts On Post Disinfection Water Quality In Small Systems—A Case Study From Auburn And Nebraska City, Nebraska, Matteo D'Alessio, Bruce Dvorak, Chittaranjan Ray

Daugherty Water for Food Global Institute: Faculty Publications

Small water systems can experience a fluctuating quality of water in the distribution system after disinfection. As chlorine is the most common disinfectant for small systems, the occurrence of disinfection byproducts (DBPs) represents a common problem for these systems. Riverbank filtration (RBF) can be a valuable solution for small communities located on riverbanks. The objectives of this study were to evaluate (i) the improvements in water quality at two selected RBF systems, and (ii) the potential lower concentrations of DBPs, in particular, trihalomethanes (THMs), in small systems that use RBF. Two small communities in Nebraska, Auburn and Nebraska City, using …

Flow Analysis Through Collectorwell Laterals: A Case Study From Sonoma County Water Agency, California, Matteo D'Alessio, John Lucio, Ernest Williams, Donald Seymour, Jay Jasperse, Chittaranjan Ray

Daugherty Water for Food Global Institute: Faculty Publications

The Sonoma County Water Agency (SWCA) uses six radial collector wells along the Russian River west of Santa Rosa, to provide water for several municipalities and water districts in north-western California. Three collector wells (1, 2, and 6) are located in the Wohler area, and three collector wells (3, 4, and 5) are located in the Mirabel area. The objective of this paper is to highlight the performance of the three collector wells located in the Mirabel area since their construction. The 2015 investigation showed a lower performance of Collectors 3 and 4 compared to their original performances after construction …

Assessing The Feasibility Of Soil Infiltration Trenches For Highway Runoff Control On The Island Of Oahu, Hawaii, Martina Sobotkova, Jaromir Dusek, Ghasem Alavi, Laxman Sharma, Chittaranjan Ray

Daugherty Water for Food Global Institute: Faculty Publications

The coastal waters of Hawaii are extremely important for recreation as well as for the health of the marine environment. Non-point source pollution from storm runoff poses a great threat to surface water quality in Hawaii. The State of Hawaii Department of Transportation (HDOT) includes infiltration trenches as a best management practice (BMP) option to reduce pollution caused by stormwater runoff. HDOT guidelines state that the implementation of BMPs is needed to reduce sediment and pollutant loads to streams and the ocean. In this study, the suitability of soils adjacent to highways on Oahu for the siting of infiltration trenches …

Transition Pathways To Sustainable Agricultural Water Management: A Review Of Integrated Modeling Approaches, Erin M.K. Haacker, Vaishali Sharda, Amanda M. Cano, R. Aaron Hrozencik, Agustin Nunez, Zachary Zambreski, Soheil Nozari, Garvey Engulu B, Smith, Lacey Moore, Sumit Sharma, Prasanna Gowda, Chittaranjan Ray, Meagan Schipanski, Reagan Waskom

Nebraska Water Center: Faculty Publications

Agricultural water management (AWM) is an interdisciplinary concern, cutting across traditional domains such as agronomy, climatology, geology, economics, and sociology. Each of these disciplines has developed numerous process-based and empirical models for AWM. However, models that simulate all major hydrologic, water quality, and crop growth processes in agricultural systems are still lacking. As computers become more powerful, more researchers are choosing to integrate existing models to account for these major processes rather than building new cross-disciplinary models. Model integration carries the hope that, as in a real system, the sum of the model will be greater than the parts. However, …

Simulating The Impacts Of Irrigation Levels On Soybean Production In Texas High Plains To Manage Diminishing Groundwater Levels, Vaishali Sharda, Prasanna H. Gowda, Gary Marek, Isaya Kisekka, Chittaranjan Ray, Pradip Adhikari

Nebraska Water Center: Faculty Publications

There is an increasing need to strategize and plan irrigation systems under varied climatic conditions to support efficient irrigation practices while maintaining and improving the sustainability of groundwater systems. This study was undertaken to simulate the growth and production of soybean [Glycine max (L.)] under different irrigation scenarios. The objectives of this study were to calibrate and validate the CROPGRO-Soybean model under Texas High Plains’ (THP) climatic conditions and to apply the calibrated model to simulate the impacts of different irrigation levels and triggers on soybean production. The methodology involved combining short-term experimental data with long-term historical weather data (1951–2012), …

Energy Demand And Water Footprint Study Of An Agricultural Machinery Industry, Mantoam E,J., Mesfin Mekonnen, T.L. Romanelli

Daugherty Water for Food Global Institute: Faculty Publications

The intensification of agricultural production systems demands power, supplied by agricultural machinery, besides more agricultural inputs such as fertilizers, pesticides and seeds. Agricultural mechanization provides increase in the global production of food, fiber and bioenergy; and it brought economic benefits to producers, but causing larger energy consumption. Energy embodiment in agricultural machinery has been done in earlier studies, but data usually are from car industry. This study aimed to determine the energy demand and water footprint in a plant that assembles five types of agricultural machinery from a multinational manufacturer located in Piracicaba municipality in Sao Paulo state, Brazil. That …

Accumulation Of Lead By Biofilms In Drinking Water Distribution Systems, Kaleb Oren Belcher

Graduate Theses and Dissertations

Recent crises, such as the one in Flint, MI, indicate that lead exposure from drinking water is a major health concern in the United States. Over six million lead service lines are still in use in the United States, and a universal protocol to safely remove these lead service lines from drinking water distribution systems has not yet been established. This paper calls to attention the potential hazard that biofilms pose as a source of lead in distribution systems, even after the removal of lead pipes. This study used a simulated water distribution system containing a lead source pipe and …

A Stormwater Management Model For California Polytechnic State University Campus, Hsuan-Wen Chu

Master's Theses

Developments that have been taking place on Cal Poly campus over the years have altered the natural hydrology of the area. Stormwater management practices could help reduce the impacts of these developments. Computer models can help to design effective and economical stormwater management solutions at a watershed scale. As such, the objective of this study was to develop a stormwater management model for Cal Poly campus. The model was developed based on the utility data obtained from the university and other watershed data available from open sources. Field surveys were conducted to address some anomalies in the utility data, and …

Environmental Fate And Microbial Effects Of Monensin, Lincomycin, And Sulfamethazine Residues In Soil, Matteo D'Alessio, Lisa M. Durso, Daniel N. Miller, Brian Woodbury, Chittaranjan Ray, Daniel D. Snow

Nebraska Water Center: Faculty Publications

The impact of commonly-used livestock antibiotics on soil nitrogen transformations under varying redox conditions is largely unknown. Soil column incubations were conducted using three livestock antibiotics (monensin, lincomycin and sulfamethazine) to better understand the fate of the antibiotics, their effect on nitrogen transformation, and their impact on soil microbial communities under aerobic, anoxic, and denitrifying conditions. While monensin was not recovered in the effluent, lincomycin and sulfamethazine concentrations decreased slightly during transport through the columns. Sorption, and to a limited extent degradation, are likely to be the primary processes leading to antibiotic attenuation during leaching. Antibiotics also affected microbial respiration …