Predicting Post-Fire Change In West Virginia, Usa From Remotely-Sensed Data, 2016 West Virginia University
Predicting Post-Fire Change In West Virginia, Usa From Remotely-Sensed Data, Michael Strager P. Strager, Melissa Thomas-Van Gundy, Aaron E. Maxwell
Journal of Geospatial Applications in Natural Resources
Prescribed burning is used in West Virginia, USA to return the important disturbance process of fire to oak and oak-pine forests. Species composition and structure are often the main goals for re-establishing fire with less emphasis on fuel reduction or reducing catastrophic wildfire. In planning prescribed fires land managers could benefit from the ability to predict mortality to overstory trees. In this study, wildfires and prescribed fires in West Virginia were examined to determine if specific landscape and terrain characteristics were associated with patches of high/moderate post-fire change. Using the ensemble machine learning approach of Random Forest, we determined ...
Looking Upstream: An Analysis Of Low Water Levels In Lake Powell And The Impacts On Water Supply, Hydropower, Recreation, And The Environment: A Companion Report To The Bathtub Ring, 2016 Selected Works
Looking Upstream: An Analysis Of Low Water Levels In Lake Powell And The Impacts On Water Supply, Hydropower, Recreation, And The Environment: A Companion Report To The Bathtub Ring, Michael Johnson, Lindsey Ratcliff, Rebecca Shively, Leanne Weiss
viii, 110 pages : color illustrations, color maps
Artificial Recharge In The Las Vegas Valley: An Operational History, 2016 Selected Works
Artificial Recharge In The Las Vegas Valley: An Operational History, Michael Johnson, Erin Cole, Kay Brothers
Artificially recharging the Las Vegas Valley (Valley) ground-water system with treated Colorado River water is one water resource management option employed by the Las Vegas Valley Water District (District) to help meet future long-term and short-term peak water demands. The District began operation of an artificial ground-water recharge program in 1988 in order to bank water for future use and to slow declining water levels. Artificial recharge occurs in the winter months, typically from October to May, when there is excess capacity in the Southern Nevada Water System (SNWS), currently a 400 Million Gallon per Day (MGD) treatment and transmission ...
Isaw: Integrating Structure, Actors, And Water To Study Socio-Hydro-Ecological Systems, 2016 University of Utah
Isaw: Integrating Structure, Actors, And Water To Study Socio-Hydro-Ecological Systems, R. L. Hale, A. Armstrong, M. A. Baker, S. Bedingfield, D. Betts, C. Buahin, M. Buchert, T. Crowl, R. R. Dupont, J. R. Ehleringer, Joanna Endter-Wada, C. Flint, J. Grant, S. Hinners, J. S. Horsburgh, D. Jackson-Smith, A. S. Jones, C. Licon, S. E. Null, A. Odame, D. E. Pataki, D. Rosenberg, M. Runburg, P. Stoker, C. Strong
Urbanization, climate, and ecosystem change represent major challenges for managing water resources. Although water systems are complex, a need exists for a generalized representation of these systems to identify important components and linkages to guide scientific inquiry and aid water management. We developed an integrated Structure-Actor-Water framework (iSAW) to facilitate the understanding of and transitions to sustainable water systems. Our goal was to produce an interdisciplinary framework for water resources research that could address management challenges across scales (e.g., plot to region) and domains (e.g., water supply and quality, transitioning, and urban landscapes). The framework was designed to ...
In Situ Bioremediation Of Contaminated Unsaturated Subsurface Soils, 2016 Selected Works
In Situ Bioremediation Of Contaminated Unsaturated Subsurface Soils, Joseph L. Sims, R. C. Sims, R. R. Dupont, J. E. Mathews, M. M. Russell
An emerging technology for the remediation of unsaturated subsurface soils involves the use of microorganisms to degrade contaminants which are present in such soils. Understanding the processes which drive in situ bioremediation, as well as the effectiveness and efficiency of the utilization of these systems, are issues which have been identified by the Regional Superfund Engineering Forum as concerns of Superfund decision makers.
Drainage Water Storage For Improved Resiliency And Environmental Performance Of Agricultural Landscapes, B. Reinhart, J. Frankenberger, L. Abendroth, L. Ahiablame, L. Bowling, L. Brown, M. Helmers, D. Jaynes, X. Jia, K. Nelson, J. Strock, M. Youssef
Matthew J. Helmers
Drained lands, which include some of the most productive lands in the world, can experience both water excess and water deficit within a year. Storing drained water within the landscape could increase the sustainability of water for agriculture, particularly as intense rainfall and prolonged summer drought continue to increase under future climate change. A team of researchers and extension specialists from nine states are currently working towards a vision of transforming the process of designing and implementing agricultural drainage to include storage through the use of controlled drainage, saturated buffers, and drainage water recycling (i.e. capture, storage, and reuse ...
Comparing Nitrate Sink Strength In Perennial Filter Strips At Toeslopes Of Cropland Watersheds, 2016 Iowa State University
Comparing Nitrate Sink Strength In Perennial Filter Strips At Toeslopes Of Cropland Watersheds, David C. Mitchell, Xiaobo Zhou, Timothy B. Parkin, Matthew J. Helmers, Michael J. Castellano
Matthew J. Helmers
Integration of perennial filter strips (PFS) into the toeslopes of agricultural watersheds may decrease downstream nitrate (NO3) losses. However, long-term NO3 removal depends on the relative importance of several NO3 sinks in the PFS. Plant biomass and labile soil organic matter (SOM) are temporary NO3 sinks, while stable SOM is a long-term, but potentially finite, NO3 sink. In contrast, denitrification is a permanent NO3 sink. We investigated the relative importance of these NO3 sinks in PFS at the toeslope of row crop watersheds in Iowa. Using 25- × 30-cm in situ mesocosms, we added 15NO3 to PFS soils and quantified 15NO3 ...
Comparison Of Timing And Volume Of Subsurface Drainage Under Perennial Forage And Row Crops In A Tile-Drained Field In Iowa, Ryan J. Goeken, Xiaobo Zhou, Matthew J. Helmers
Matthew J. Helmers
Subsurface drainage systems in Iowa increase the productivity of annual row crops, such as corn and soybeans, but also contribute to alterations in the hydrological balance of the region and leaching of nutrient pollutants, such as NO3-N. This study’s objective was to determine whether perennial forage orchardgrass can reduce the volume and change the timing of subsurface drainage in tiled fields in Iowa, thereby contributing to reductions in NO3-N leaching and moderating changes in the hydrology. Research was conducted at Iowa State University’s Agricultural Drainage Water Research Site, located in northwest Iowa. Six 0.05 ha plots (three ...
Denitrification And Nitrous Oxide Emissions In Annual Croplands, Perennial Grass Buffers, And Restored Perennial Grasslands, Javed Iqbal, Timothy B. Parkin, Matthew J. Helmers, Xiaobo Zhou, Michael J. Castellano
Matthew J. Helmers
Inclusion of perennial vegetation filter strips (PFSs) in the toeslope of annual cropland watersheds can decrease NO3−–N losses to ground and surface waters. Although PFSs are similar to riparian buffers, the processes responsible for NO3−–N removal from PFSs are not well understood. Our objectives were to (i) determine the importance of denitrification as a sink for NO3−–N loss from PFSs and (ii) evaluate how PFSs alter the biophysical processes that affect the relative importance of N2O and N2 emissions. To address our objectives, we used a coupled field laboratory approach with experimental watersheds that included the following ...
Evaluating Denitrifying Bioreactors For Edge-Of-Field Nitrogen Management In Iowa's Tile-Drained Landsacpes, 2016 Iowa State University
Evaluating Denitrifying Bioreactors For Edge-Of-Field Nitrogen Management In Iowa's Tile-Drained Landsacpes, Matt Helmers, Alok Bhandari
Matthew J. Helmers
Bioreactors show significant potential for removing nitrate from Iowa’s drained fields. The investigators tested the design and management of bioreactors to see what factors can make the bioreactors operate most efficiently, and how that performance compares to other drainage water quality improvement practices.
Drainage Water Quality Impacts Of Current And Future Agricultural Management Practices, 2016 Iowa State University
Drainage Water Quality Impacts Of Current And Future Agricultural Management Practices, Matt Helmers, Ramesh S. Kanwar, Antonio P. Mallarino
Matthew J. Helmers
Researchers examined how crop tillage, rotation or crop residue removal can affect the chemical composition of water draining from farm fields.
Agronomic, Environmental And Economic Performance Of Alternative Biomass Cropping Systems, 2016 Iowa State University
Agronomic, Environmental And Economic Performance Of Alternative Biomass Cropping Systems, Lisa A. Schulte Moore, Kenneth J. Moore, Richard B. Hall, Arne Hallam, Matt Helmers
Matthew J. Helmers
If cellulosic biomass is to play a significant role in America's energy future, research needs to be conducted on the optimal production and placement practices. This project looked at a portfolio of biomass cropping systems that might be adopted for Iowa.
Assessing Surface Flowpaths And Vegetative Buffers Using Arcgis Hydrologic Spatial Analysis For Rock Creek Watershed, Central Iowa, M. Bansal, S. K. Mickelson, M. J. Helmers, K. Arora, D. Webber, B. K. Gelder, M. Shrivastav, C. J. Judge
Matthew J. Helmers
Non point-source (NPS) pollution is a major cause of surface water quality degradation due to the transport of chemicals, nutrients, and sediments into lakes and streams. Vegetative buffers comprise several effective landscape Best Management Practices (BMPs) that include Vegetative Filter Strip (VFS) buffers, grassed waterways, terraces, and wetlands. However, some BMPs are ineffective due to concentrated surface flow, improper cropland/contributing area to VFS buffer area ratios, and flowpaths that completely bypass vegetative buffers. The primary objective of this study was to assess the effectiveness of VFS buffers and other vegetative BMPs to intercept surface runoff by quantifying the accuracy ...
Odm Tools Python: Open Source Software For Managing Continuous Sensor Data, 2016 Selected Works
Odm Tools Python: Open Source Software For Managing Continuous Sensor Data, Jeffery S. Horsburgh, Stephanie Reeder, Amber Spackman Jones
Hydrologic and water quality data is being collected at high frequencies, for extended durations, and with spatial distributions that require infrastructure for data storage and management. The Observations Data Model (ODM), which is part of the Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI) Hydrologic Information System (HIS), was developed as a framework in which to organize, store, and describe point observations data. In this paper we describe ODM Tools Python, which is an open source software application that allows ODM users to query and export, visualize, and edit data stored in an ODM database. Previous versions ...
Cache Water District: Risks And Opportunities. Research And Policy Analysis Report On Formation Of A Water Conservancy District In Cache County, Utah., Lisa W. Welsh, Joanna Endter-Wada
An Economic Evaluation Of The Salinity Impacts From Energy Development: The Case Of The Upper Colorado River Basin, Rangesan Narayanan, Sumol Padungchai, A. Bruce Bishop
To analyze the effect of potential energy development on water allocation and water quality in the Upper Colorado River Basin, a linear programming model is formulated. Using the model, changes in salinity are predicted. Further, least-cost strategies to maintain the established numeric salinity criteria through both structural and nonstructural alternatives are developed. The effectiveness of alternative control measures are examined within given institutional constraints. Based on cost-benefit analysis, optimal salinity levels over time are proposed. The economic feasibility of presently planned strucutral measures to reduce salinity is investigated and contrasted with nonstructural alternatives.
Analysis Of Water Reuse Alternatives In An Integrated Urban And Agricultural Area, 2016 Selected Works
Analysis Of Water Reuse Alternatives In An Integrated Urban And Agricultural Area, A. Bruce Bishop, David W. Hendricks
The growing demands on our existing water supplies and the current problems of water shortage emphasize the need for a comprehensive approach to analysis and planning of water reuse. The primary focus, heretofore, has been on the treatment technology for achieving water reuse.
The concept of reuse, however, should be broadened to consider a totally integrated urban and agricultural system. This necessitates a systems analysis where water reuse, together with all other water dispositions, is considered in the context of its contribution to the total water resources pool of a region.
The components of the water resource system are ...
A Methodology For Public-Planner Interaction In Multiobjective Project Planning And Evaluation, Mac Mckee, T. Ward Morgan, Rangesan Narayanan, A. Bruce Bishop
A review of current multiple objective planning techniques is presented. A critique of certain classes of these techniques is offered, especially in terms of the degree to which they facilitate certain information needs of the planning process. Various tools in operations research are used to constructed a new multiple objective planning methodology, called the "Vector Optimization Decision Convergence Algorithm" (VODCA). An application of the methodology pertaining to water resources development in Utah is documented.
A Methodology For Estimating Instream Flow Values For Recreation, 2016 Selected Works
A Methodology For Estimating Instream Flow Values For Recreation, Parvaneh Amirfathi, Rangesan Narayanan, A. Bruce Bishop, Dean Larson
Water flowing in streams has value for various types of recreationists and is essential for fish and wildlife. Since water demdns for offstream uses in the arid west have been steadily increasing, increasing instream flows to enhance the recreational experience might be in conflict with established withdrawals for uses such as agriculture, industries, and households. Since market prices are not observable for instream flows, the estimation of economic value of instream flow would present well known difficulties. The household production function theory was used to build the theoretical model to measure economic value of instream flow. A representative sample of ...
An Economic Evaluation Of Benefits And Costs Of Maintaining Instream Flows, 2016 Selected Works
An Economic Evaluation Of Benefits And Costs Of Maintaining Instream Flows, Rangesan Narayanan, Dean T. Larson, A. Bruce Bishop, Parvaneh Amirfathi
Instream flows enhance recreation, hydropower, fish and wildlife maintenance, and riverine ecosytems. Each use has water requirements that vary over time in unique patterns. The determination of the overall instream requirement at any given time must be considered in competition with the demand for municipal and agricultural uses. Two obstacles to integrating instream uses into the appropriation system of water law are difficulty in satisfying the legal requirements of an appropriation for a public use and the fact that instream flow uses are considered more "environmental" than "economic" in character. The extreme options for allocating flow between these user groups ...