129 research outputs found
EVALUATING USE OF OUTLOOK INFORMATION IN GRAIN SORGHUM STORAGE DECISIONS
This study examines grain sorghum storage decisions in the Texas Coastal Bend region. Decisions involving use and non-use of outlook information are compared using stochastic dominance criteria. Results indicate outlook information is of value to most classes of decision-makers. The value of outlook information, however, is contingent upon producers' risk preferences. The methodology presented could be used to evaluate a more extensive set of marketing strategies for grain sorghum as well as for other crops.Crop Production/Industries,
An Optimal Control Framework to Address the Relationship between Water Resource Management and Water-Borne Health Impacts: Focus on the Texas Lower Rio Grande Valley
The objective of this study is develop a theoretical model that can evaluate two types of public health expenditures on water-borne health risks: water-related municipal services, an ex ante preventative measure against water-borne contamination, and medical treatment, an ex post treatment of the water-borne pollutant’s harmful effects on human health. The modeled community can allocate resources in either centralized-municipal water-services, point-of-use water-services, or medical intervention, with expenditures subject to a budget constraint. The movement of a water-borne illness through the community is modeled with a susceptible-infected-susceptible (SIS) disease framework. An optimization framework is developed, including a statement of the problem’s Hamiltonian and first-order-conditions. The first-order-conditions are discussed. Future work includes obtaining a numerical solution to the optimization problem.water, public health, rural development, dynamic optimization, Community/Rural/Urban Development, Resource /Energy Economics and Policy,
Seawater Desalination for Municipal Water Production
This paper examines the optimal allocation of several inputs in the context of seawater desalination by reverse osmosis (RO) as a source of municipal (or commercial or industrial) water. A cost-minimization model is developed, a production function is estimated, and sensitivity analyses are conducted using the optimization model to investigate the effect of environmental conditions and economic factors on the optimal input portfolio and the cost of operating a modeled seawater desalination facility. The objectives of this paper are to better understand the effect on the seawater desalination facility’s costs and input portfolio from changes in water quality, membrane lifespan, daily operations schedule, and energy prices. Findings include that lower total facility costs are associated with warm-weather water quality parameters, longer membrane life, and mid-range daily operations schedule (14.265 hours/day). Under most conditions, an interruptible power supply regime reduces facility costs. Exceptions include when the interruptible power supply regime implies significant reductions in operating hours and the associated reduction in energy price is very small.water, production, seawater desalination, Resource /Energy Economics and Policy,
An Analysis of the Economic and Financial Life-Cycle Costs of Reverse-Osmosis Desalination in South Texas: A Case Study of the Southmost Facility
Desalination provides a supply alternative for potable water for many communities, along with possible defenses against security threats potentially affecting clean water supplies. The economic and financial life-cycle costs associated with building and operating the Southmost desalination facility (near Brownsville, TX) in South Texas are investigated using the spreadsheet model DESAL ECONOMICS©. Primary data key to this analysis include actual initial construction costs, annual continued costs (i.e., for source-water acquisition and transport, pretreatment, purification, and delivery), capital replacement expenses, and desalination-process parameters. The input data used reflect the unique location and quality of source water, process-flow design, asset selection and configuration, management structure, local cost rates, and employed operational methods unique to the Southmost facility. Thus, the specific results are only applicable to the Southmost facility for a specific time, but do provide useful information and insight into life-cycle costs for public and commercial desalination facilities in a more general sense.
Annuity equivalent costs are reported (on both a /1,000 gallons of finished water basis, f.o.b. (free on board) municipal delivery point) for seven individual operational/expense areas, as well as for the entire desalination facility. Results are also presented across different cost types, categories, and items. The baseline results are deterministic, but are expanded to include sensitivity analyses of useful life, initial construction costs, annual energy costs, and production efficiency rate, amongst others.
The current estimated total annual life-cycle costs (in 2006 dollars) to produce and deliver desalinated water to a point in the municipal delivery-system infrastructure for the Southmost facility are 769.62/ac-ft {2.3619/1,000 gal.}. These baseline estimates apply to the Southmost facility and are sensitive to changes in the production efficiency level, and costs incurred for energy, chemicals, initial construction, etc. Also, results indicate significant outlays, beyond those of Initial Construction, are involved with desalination. For the Southmost facility, when a commitment was made to build a facility for 39.1 million (basis 2006 dollars) was also made for Continued and Capital Replacement costs. Investigation into life-cycle costs during the design and planning stages of a desalination facility can assist with determining the least-cost asset configuration to adopt and operational methods to employ.
Also included are modifications to certain key data-input parameters that provide ‘modified results’ which facilitate a more fair basis of comparing facilities and/or technologies. The modified results, which are considered appropriate to use when comparing to similarlycalculated values (for other facilities or technologies), are 615.01/ac-ft/yr {1.8874/1,000 gal./yr} (basis 2006 dollars)
STRATEGIC AGRIBUSINESS OPERATION REALIGNMENT IN THE TEXAS PRISON SYSTEM
Mathematical programming-based systems analysis is used to examine the consequences of alternative operation configuration for the agricultural operations within the Texas Department of Criminal Justice. Continuation versus elimination of the total operation as well as individual operating departments are considered. Methodology includes a firm systems operation model combined with capital budgeting and an integer programming based investment model. Results indicate the resources realize a positive return as a whole, but some enterprises are not using resources profitably. The integer investment model is found to be superior for investigating whether to continue multiple interrelated enterprises.agribusiness, enterprise selection, mathematical programming, optimal enterprise organization, Agribusiness,
An Overview of the Operational Characteristics of Selected Irrigation Districts in the Texas Lower Rio Grande Valley: Brownsville Irrigation District
Population expansion and water shortfalls have placed the Texas Lower Rio
Grande Valley (Valley) center stage in water publicity. The unique characteristics and
lack of public knowledge on how irrigation districts divert and convey water from the
Rio Grande to municipal, industrial, and agriculture consumers have precipitated
questions regarding the operations and makeup of these districts. Differences between
and similarities across irrigation districts can be partially attributed to the topography,
water-delivery infrastructure system, past financial decisions, and each irrigation
district’s population demographics and clientele base. The Brownsville Irrigation
District (BID), with its unusual use of a natural resaca system and advanced technology
directing flow-control mechanisms, is one of the 29 distinct irrigation districts in the
Valley. This study presents a comprehensive analysis of BID that includes a brief
historical background, a description of the District, and discussion of the District’s
current operations. Specific information in the report details not only the use of
technology within the District, but also how the District diverts and delivers its
allocated water from the Rio Grande, how it is used (i.e., municipal, industry, and
agriculture), and mechanisms for allocation within and outside the District.
The uniqueness of the Lower Rio Grande Valley irrigation districts requires an
understanding of their origins and operating mannerisms in order to explain their
overall institutional effects. Through unlocking some of the conundrum associated
with these individual irrigation districts, policymakers and other interested
stakeholders should have a better perception of the culture and evolution that surround
these unique districts, thereby facilitating improved policy-making decisions affecting
the region’s water supply and usage
An Overview of Operational Characteristics of Selected Irrigation Districts in the Texas Lower Rio Grande Valley: Hidalgo County Irrigation District No. 2 (San Juan)
Population expansion and water shortfalls have placed the Texas Lower Rio
Grande Valley (Valley) center stage in water publicity. The unique characteristics and
lack of public knowledge on how irrigation districts divert and convey water from the
Rio Grande to municipal, industrial, and agriculture consumers have precipitated
questions regarding the operations and makeup of these districts. Differences between
and similarities across irrigation districts can be partially attributed to the topography,
water-delivery infrastructure system, past financial decisions, and population
demographics and clientele base of each irrigation district. The Hidalgo County
Irrigation District No. 2 (HCID2), with its unusually high number of urban customers
and extensive number of water rights owned, is one of the 29 distinct irrigation districts
in the Valley. This study provides a historical background, a description of the District,
and a discussion of the District’s current operations. Specific information in the report
details not only the use of technology within the District, but also how the District
diverts and delivers its allocated water from the Rio Grande, how it is used (i.e.,
municipal, industry, and agriculture), and mechanisms for allocation within and
outside the District.
The uniqueness of the Lower Rio Grande Valley irrigation districts requires an
understanding of their origins and operating mannerisms to explain their overall
institutional effects. Through unlocking some of the conundrum associated with these
individual irrigation districts, policymakers and other interested stakeholders will have
a better perception of the culture and evolution that surround these unique districts,
thereby facilitating improved policy-making decisions affecting the region’s water
supply and usage
Integrating Economic Analysis Wiith Biophysical Simulation: Appraising Blackland Corn Production.
60 p
Evolution of Irrigation Districts and Operating Institutions: Texas, Lower Rio Grande Valley
The growing population in the Texas Lower Rio Grande Valley, shortfalls
in water deliveries from Mexico, and multiple years of drought have placed an
increased need for efficient water management and allocation in the Rio Grande
Basin. These improvements are essential regardless of the treaty compliance
issues between Mexico and the U.S. for improved water deliveries to satisfy the
1944 Water Treaty. This report presents a broad overview of how the history of
settlement and development shaped current water rights and laws, how the
waters of the Rio Grande are divided between the two nations, and how the U.S.
and the State of Texas manage their portions. Legal rules and regulations, both
current and past, represent the complexity of water allocated in the region. The
paper overviews characteristics of the 1944 International Water Treaty and
management of Amistad and Falcon international reservoirs by the International
Boundary and Water Commission. This overview provides insight on history and
the basics of the current set of water allocations, rules and regulations, and some
discussion of evolving institutions, i.e., water authorities. Knowledge of the
background of the region facilitates ongoing water management policy
deliberations, revision/development of policies, and future management of limited
water resources. A review of selected Rio Grande Basin irrigation districts and
associated operating principles will follow in subsequent reports
- …