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57
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February 1986 - present
Publications
Publications (57)
Nucleic acid-based assays, such as polymerase chain reaction (PCR), that amplify and detect organism-specific genome sequences are a standard method for infectious disease surveillance. However, challenges arise for virus surveillance because of their genetic diversity. Here, we calculated the variability of nucleotides within the genomes of 10 hum...
Nucleic acid-based assays, such as polymerase chain reaction (PCR), that amplify and detect organism-specific genome sequences are a standard method for infectious disease surveillance. However, challenges arise for virus surveillance because of their genetic diversity. Here, we calculated the variability of nucleotides within the genomes of ten hu...
Wastewater-based epidemiology (WBE), an emerging approach for community-wide COVID-19 surveillance, was primarily characterized at large sewersheds such as wastewater treatment plants serving a large population. Although informed public health measures can be better implemented for a small population, WBE for neighborhood-scale sewersheds is less s...
A nutrient loss reduction strategy is necessary to guide the efforts of improving water quality downstream of an agricultural watershed. In this study, the effectiveness of two winter cover crops, namely cereal rye and annual ryegrass, is explored as a loss reduction strategy in a watershed that ultimately drains into a water supply reservoir. Usin...
Wastewater-based epidemiology (WBE), an emerging approach for community-wide COVID-19 surveillance, was primarily characterized at large sewersheds such as wastewater treatment plants serving a large population. Although informed public health measures can be better implemented for a small population, WBE for neighborhood-scale sewersheds is less s...
Threshold changes in rainfall‐runoff generation commonly represent shifts in runoff mechanisms and hydrologic connectivity controlling water and solute transport and transformation. In watersheds with limited human influence, threshold runoff responses reflect interaction between precipitation event and antecedent soil moisture. Similar analyses ar...
Threshold changes in rainfall-runoff generation commonly represent shifts in runoff mechanisms and hydrologic connectivity controlling water and solute transport and transformation. In watersheds with limited human influence, threshold runoff responses reflect interaction between precipitation event and antecedent soil moisture. Similar analyses ar...
This study investigated the accuracy and suitability of several methods commonly used to estimate riverine nitrate loads at eight watersheds located southwest of Lake Erie in the Midwestern United States. This study applied various regression methods, including a regression estimator with five, six, and seven parameters, an estimator enhanced by co...
In Illinois, excessive sedimentation continues to be a critical water quality issue that has both environmental and economic consequences. Water supply reservoirs and shipping lanes need to be dredged periodically to maintain function. Furthermore, research shows that excessive sedimentation can directly or indirectly degrade the biological health...
Core Ideas
IML‐CZO is structured to study system responses through event‐based monitoring.
Management legacy has shaped critical zone processes.
Management and weather affect landscape heterogeneity and surface–subsurface pathways.
In intensively managed landscapes, interactions between surface (tillage) and subsurface (tile drainage) management w...
The damming of rivers has created hotspots for organic carbon sequestration and methane production on a global scale as the reservoirs intercept fluvial suspended and dissolved loads. To better understand how the C-biogeochemistry of a reservoir responds to watershed processes and evolves over time, Lake Decatur, located in the Intensively Managed...
Expansion and intensification of managed landscapes for agriculture have resulted in severe unintended global impacts, including degradation of arable land and eutrophication of receiving water bodies. Modern agricultural practices rely on significant direct and indirect human energy inputs through farm machinery and chemical use, respectively, whi...
Intensively managed land increases the rate of nutrient and particle transport within a basin, but the impact of these changes on microbial community assembly patterns at the basin scale is not yet understood. The objective of this study was to investigate how landscape connectivity and dispersal impacts microbial diversity in an agricultural-domin...
The 2012 Drought in Illinois. (http://www.isws.illinois.edu/pubdoc/RI/ISWSRI-123.pdf)
Drought severity is generally defined by its impacts (Changnon et al., 1996). Such impacts can range from comparatively short-term effects on agriculture and horticulture to long-term effects on shallow groundwater and surface water supplies, and include a variety...
Many major streams in Illinois flow into the Illinois River, which drains nearly half of the state. The Illinois Waterway, with its system of locks and dams, links Chicago and the Great Lakes to the Mississippi River and thereby to the Gulf of Mexico. This linkage has significant transportation and commercial values for the state and the nation. In...
Many major streams in Illinois flow into the Illinois River, which drains nearly half of the state. The Illinois Waterway, with its system of locks and dams, links Chicago and the Great Lakes to the Mississippi River and thereby to the Gulf of Mexico. This linkage has significant transportation and commercial values for the state and the nation. In...
Nonpoint source pollution (NPS) resulting from agricultural production is one of the major causes of impaired natural resources, adversely affecting the provision of ecosystem services. Best management practices (BMPs) are commonly implemented in watersheds to mitigate agricultural NPS. Appropriate selection of BMP type and its placement in agricul...
The Cache River basin, located in southern Illinois, has characteristics unique to the State of Illinois and nation, with diverse physical, chemical, and biological features that produced a great diversity of natural communities. Because of these unique characteristics, the Cache River basin contains some high quality bottomland hardwood forests an...
Surface and subsurface agricultural runoff has been the main cause of water quality problems in Lake Decatur, which is the major s ource of public water supply for the City of Decatur and the Village of Mt. Zion, serving a total population of more than 80,000. The lake has a watershed area of 925 square miles and was created by building a dam on th...
Quantitative monitoring of water conditions in a field is a critical ability for environmental science studies. We report the design, fabrication and testing of a low cost, miniaturized and sensitive electrochemical based nitrate sensor for quantitative determination of nitrate concentrations in water samples. We have presented detailed analysis fo...
published or submitted for publication is peer reviewed
published or submitted for publication is peer reviewed
The Cache River is located in the extreme southern part of Illinois, just north of the confluence of the Ohio and Mississippi Rivers. Major floods in both of the two rivers have significant impact on the hydrology and hydraulics of the Cache River. In 1915, a cutoff to the Ohio River was constructed east of Karnak that resulted in sub-dividing the...
The Upper Sangamon River watershed in Illinois is intensively managed for corn and soybean production. Lake Decatur is a water supply reservoir on the Upper Sangamon River and the drinking water source for the City of Decatur in central Illinois. The reservoir has experienced excessive sedimentation since construction and, for over 25 years, high m...
The Illinois River Conservation Reserve Enhancement Program (CREP) was initiated as a joint federal/state program with the goal of improving water quality and wildlife habitat in the Illinois River Basin. Based on long-term data and research, the two main causes of water quality and habitat degradations in the Illinois River were sedimentation and...
Cache River Joint Venture Partnership published or submitted for publication is peer reviewed
Sedimentation along the Lower Cache River and the adjoining side channels and wetlands has been recognized as one of the major causes of habitat degradation in the Cache River located in extreme southern Illinois just north of the confluence of the Mississippi and Ohio Rivers. Several factors combine to cause excessive sedimentation in the upper re...
Substantial effort has been spent computing effective discharge (Q e) values and their corresponding flow recurrence intervals for different stream sizes and within different geographical and ecological regions. Existing literature reports recurrence intervals varying from less than 1.1 years to more than 10 years with a commonly accepted average o...
The purpose of a geomorphic assessment is to characterize and evaluate a fluvial system for determining the past watershed and channel conditions, current geomorphic character and potential future channel adjustments. The geomorphic assessment approach utilized by the Illinois State Water Survey assesses channel response to disturbance at multiple...
The Illinois River Basin Ecosystem Restoration Plan acknowledges that erosion by the Illinois River and its tributaries, as well as sediment deposition within the river valley, are significant problems. Naturalization of tributary streams and restoration of biodiversity are key, yet often missing components of traditional watershed planning and man...
The diversity of Illinois' streams provides a broad range of conditions, and thus a variety of restoration techniques may be required to adequately compensate for watershed alterations. Resource management agencies and research institutions in the state have collaborated on a variety of applied research initiatives to assess the efficacy of various...
An array of different geomorphic assessment approaches for evaluating stream-channel stability is being utilized throughout the country to meet the demands of resource managers interested in stream channel restoration and management to reduce erosion and improve stream habitat. Over the last century, most of the Illinois landscape has experienced i...
The Agricultural Non-Point-Source Pollution (AGNPS) model was used to simulate storm-generated rainfall-runoff and distribution of nitrate-nitrogen (nitrate-N) concentration in the Upper Sangamon River basin draining into Lake Decatur in Decatur, Illinois. This water supply reservoir for the city of Decatur receives water from the 2,400-square-kilo...
A number of communities in Central Illinois that depend on surface water supplies for their drinking water have been experiencing water quality problems in recent years. Since the dominant land use in the region is agriculture, most of the water quality problems are generally attributed to changes in agricultural practices, especially application o...
Accidental spills of hazardous materials from various sources into navigable waterways are a major concern because of their frequency in the United States in recent years. Illinois is highly dependent on waterborne commerce, and barge shipments in Illinois account for about 15 percent of the total U.S. barge shipments on inland and intracoastal wat...
Channel adjustment and sedimentation rates are needed when determining stream management activities to reduce erosion and sedimentation. Channel adjustment rates are typically determined using historical channel geometry, channel profiles, and air photos, or dendrogeomorphic techniques. When this information is not available, sediment deposition ra...
published or submitted for publication is peer reviewed
Illinois Department of Natural Resources published or submitted for publication is peer reviewed
US Army Corps of Engineers, IDNR published or submitted for publication is peer reviewed
