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Articles 1 - 13 of 13
Full-Text Articles in Physical Sciences and Mathematics
Interactive Modification Of Quadratic Multiobjective Water Resources Planning Strategies, Paul J. Killian, Richard C. Peralta
Interactive Modification Of Quadratic Multiobjective Water Resources Planning Strategies, Paul J. Killian, Richard C. Peralta
Technical Reports
An interactive method is presented for modifying a compromise solution to a multiobjective water resources planning stategy by changing constraining conditions on regional objectives and local variables. The method is illustrated by modifying a bicriterion, sustained groundwater withdrawal strategy for minimizing the cost of meeting regional water demand on the Arkansas Grand Prairie. The strategy was developed using a model in which the finite difference form of the two-dimensional groundwater flow equation is embedded in an optimization process. The quadratic optimization is accomplished by utilizing the General Differential Algorithm to obtain values of the drawdown, pumping rate, and recharge rate …
Proceedings Of The First Arkansas Water Conference, Randy Young, Alice T. Gamache
Proceedings Of The First Arkansas Water Conference, Randy Young, Alice T. Gamache
Technical Reports
The purpose of this conference is to: Discuss Arkansas water problems and opportunities for addressing those problems. In the water resources management arena, Arkansas is truly the "Land of Opportunity" as our motto states. Serve as a public forum to stimulate thought and interest in Arkansas' water resources.
Chemistry And Apparent Quality Of Surface Water And Ground Water Associated With Coal Basins, R. B. Stroud, J. L. Spellman, R. R. Potts, A. J. Oakley
Chemistry And Apparent Quality Of Surface Water And Ground Water Associated With Coal Basins, R. B. Stroud, J. L. Spellman, R. R. Potts, A. J. Oakley
Technical Reports
Personnel of the Arkansas Mining and Mineral Resources Research Institute conducted preliminary investigations on the chemistry and quality of surface and ground water associated with 12 coal-bearing sub-basins in the Arkansas Valley coal field. The coal field is approximately 60 miles long and 33 miles wide but only in 12 areas coal is thick enough and has proper quality to be termed commercial. Both surface and underground sample sites were established in each of the sub-basins with some minor variations in four areas where not all types of sites could be located. Water was collected from 19 surface points and …
Institutional Arrangements And Financing Alternatives For State And Local Water Programs, Joseph A. Ziegler
Institutional Arrangements And Financing Alternatives For State And Local Water Programs, Joseph A. Ziegler
Technical Reports
This study analyzes alternative institutional arrangements and financing alternatives for water projects at the state and local levels with particular emphasis on Arkansas. Because most water projects are financed with debt it concentrates on alternatives which can reduce the cost of debt and/or result in more efficient use of existing facilities. Specific state options considered include grants, loans, revolving funds, debt guarantee, bond insurance, bond bank, statutory and regulatory reform of water laws and water-related institutions, and planning and technical assistance. Specific local options include use of taxes and bonds including creative financing, user fees, leasing, privitization, and financial planning.
Optimal Allocation And Scheduling Of Irrigation Water For Cotton And Soybeans, M. J. Cochran, L. D. Parsch, J. M. Redfern, H. D. Scott
Optimal Allocation And Scheduling Of Irrigation Water For Cotton And Soybeans, M. J. Cochran, L. D. Parsch, J. M. Redfern, H. D. Scott
Technical Reports
This study evaluated alternative irrigation scheduling strategies for cotton and soybean production on Sharkey clay soils in southeast Arkansas. Strategies were ranked on the basis of two basic criteria: expected net revenue and risk efficiency. Risk efficiency was defined for different risk preferences using stochastic dominance techniques. Preferred strategies for cotton employed tensiometer thresholds between -.45 atm and -.75 atm. Risk efficient soybean irrigation strategies varied with the degree of risk aversion--more risk averse decision makers prefer strategies with lower thresholds.
Demonstrations Of Arkansas' Water Management Simulator, Leslie E. Mack
Demonstrations Of Arkansas' Water Management Simulator, Leslie E. Mack
Technical Reports
One of the larger stumbling blocks to comprehensive water management is the lack of public understanding of the multitude of variables that operate at the same time within the hydrologic cycle. With more public understanding, there is greater public support for various water projects. Dr. John R. Amend from Montana State University developed a water management simulator which could handle a large number of variables simultaneously of natural surface and groundwater flow plus a number of water use variables on an accelerated time sequence. By using several remote control devices, participants can "control" their water use but have no control …
Qualitative And Quantitative Aquatic Algal Data Compilation To Determine Macrotrends, Richard L. Meyer
Qualitative And Quantitative Aquatic Algal Data Compilation To Determine Macrotrends, Richard L. Meyer
Technical Reports
A data base of the algae of Arkansas has been initiated by the selection of a relational data base management system. The system was chosen to be readily available for microcomputers using MS- or PC-DOS. The initial parameters chosen for entry are associated with the classification of the organisms from Class to the Variety level with author and year of initiation. Further annotation includes identification source. Presently, the data base of 1,162 taxa includes 226 Cyanophyceae, 367 Chlorophyceae, 124 Euglenophyceae, 26 Xanthophyceae, 81 Chryso- phyceae, 279 Bacillariophyceae, 33 Pyrrhophyceae, 14 Cryptophyceae, and 5 Rhodophyceae. These taxa are sortable by any …
Analyses Of Groundwater For Trace Levels Of Pesticides, T. L. Lavy, J. D. Mattice, T. C. Cavalier
Analyses Of Groundwater For Trace Levels Of Pesticides, T. L. Lavy, J. D. Mattice, T. C. Cavalier
Technical Reports
Agricultural production is a major source of revenue in Arkansas. In order to increase productivity, it has been necessary to rely increasingly on the use of pesticides and irrigation water. In the last 15 years several states have reported finding pesticides in groundwater as a result of normal agricultural practices. Since almost half of the population also relies on groundwater as their source of drinking water, it is necessary to conduct research as to ascertain the presence or absence of commonly used pesticides in groundwater. Multi residue analytical techniques were developed for the analysis of acifluorfen, alachlor, atrazine, cyanazine, diuron, …
The Behavior Of Soluble Salt In Sharkey Clay, J. T. Gilmour, J. A. Ferguson, H. D. Scott, R. E. Baser
The Behavior Of Soluble Salt In Sharkey Clay, J. T. Gilmour, J. A. Ferguson, H. D. Scott, R. E. Baser
Technical Reports
Soluble salt problems do exist and are significant in Arkansas. Studies have been conducted on Crowley silt loam (Typic Albaqualfs) which have established the behavior of soluble salt in that soil. The major objective of this study was to quantify the behavior of soluble salt in a second important Mississippi River Delta soil - the Sharkey (Vertic Haplaquepts). To this end, estimation of the downward redistribution of salt and the estimation of various components of the water balance for this soil served as specific objectives. Field studies were designed to monitor the movement of salt in the Sharkey soil and …
Development Of Optimal Sustained Yield Groundwater Withdrawal Strategies For The Boeuf-Tensas Basin In Arkansas, Richard C. Peralta, Bithin Datta, Jamal Solaimanian, Paul J. Killian, Amin Yazdanian
Development Of Optimal Sustained Yield Groundwater Withdrawal Strategies For The Boeuf-Tensas Basin In Arkansas, Richard C. Peralta, Bithin Datta, Jamal Solaimanian, Paul J. Killian, Amin Yazdanian
Technical Reports
The goal of this study ia to develop sustained yield pumping (discharge via wells) strategies for the Boeuf-Tensaa Basin area. The demarkation of the Boeut-Tensas area is described in the Arkansas State Vater Plan (Arkansas Soil and Water Conservation Commission. 1984). The Boeuf-Teneas Basin ia a highly developed agricultural region located in the southeast corner of Arkansas. Hydrogeologically. it is part of the Bayou Bartholomew/Alluvial Aquifer System (Broom and Reed. 1973). Before describing the Boeuf-Tensas Basin, the Bayou Bartholomew region should be discussed.
Projections Of Agricultural And Fish And Wildlife Water Demand In The Ouachita River Basin: A Linear Programming Approach, Mark J. Cochran, Mike Tessaro, J. Martin Redfern, Larry Childress, E. Moye Rutledge, Rob Raskin, Robert N. Shulstad
Projections Of Agricultural And Fish And Wildlife Water Demand In The Ouachita River Basin: A Linear Programming Approach, Mark J. Cochran, Mike Tessaro, J. Martin Redfern, Larry Childress, E. Moye Rutledge, Rob Raskin, Robert N. Shulstad
Technical Reports
The availability of an abundant water supply has been a major resource of the Ouachita River Basin. In recent years, water requirements for a number of uses have increased, raising the concern that future water shortages could occur in the basin. The purpose of the study reported here was to estimate future water demand for irrigation, commercial fisheries, and fish and wildlife uses.
Water Quality Management Strategies For Beaver Reservoir, Richard L. Meyer, W. Reed Green
Water Quality Management Strategies For Beaver Reservoir, Richard L. Meyer, W. Reed Green
Technical Reports
No abstract provided.
Arkansas Water Resources Research Center Pamphlet, Richard L. Meyer
Arkansas Water Resources Research Center Pamphlet, Richard L. Meyer
Technical Reports
Arkansas Water Resources Research Center (AWRRC), through research is committed to meeting the many and varied challenges presented to water quality by Arkansas' burgeoning urban, agricultural, and recreational water demands.