Economic and Technical Adjustments in Irrigation Due to Declining Ground Water PDF Download
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Author: William M. Crosswhite
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 48
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Author: William M. Crosswhite
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 48
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Book Description
Author: William M. Crosswhite
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 35
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Author: Wendell Holmes
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 20
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Author: Gordon Sloggett
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 24
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Book Description
Abstract: Ground-water levels are declining from 6 inches to over 5 feet annually beneath 14 million acres of irrigated land in 11 States irrigated mainly by ground water. Pumping costs are rising, and well yields are declining, causing farmers to adjust their irrigation practices. Farmers are adopting new irrigation technologies to improve irrigation efficiency and are changing to crops with lower water requirements in some areas. However, techniques for conserving ground water may not extend the life of aquifers. State and local governments have passed laws severely restricting further irrigation development in about 45 percent of the irrigated area affected by ground-water mining.
Author: James E. Casey
Publisher:
ISBN:
Category : Irrigation farming
Languages : en
Pages : 308
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Author: Dan Childs
Publisher:
ISBN:
Category : Cotton
Languages : en
Pages : 508
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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309051428
Category : Nature
Languages : en
Pages : 300
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Book Description
As demand for water increases, water managers and planners will need to look widely for ways to improve water management and augment water supplies. This book concludes that artificial recharge can be one option in an integrated strategy to optimize total water resource management and that in some cases impaired-quality water can be used effectively as a source for artificial recharge of ground water aquifers. Source water quality characteristics, pretreatment and recharge technologies, transformations during transport through the soil and aquifer, public health issues, economic feasibility, and legal and institutional considerations are addressed. The book evaluates three main types of impaired quality water sourcesâ€"treated municipal wastewater, stormwater runoff, and irrigation return flowâ€"and describes which is the most consistent in terms of quality and quantity. Also included are descriptions of seven recharge projects.
Author: Gabriela Perez-Quesada
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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The depletion of groundwater stocks reduces the flow of economic value and the production of goods from the resource. This dissertation quantifies these effects in the context of the High Plains Aquifer in the central US. One particular challenge in estimating these effects that we overcome is that feedback effects from irrigation behavior affect resource conditions, which creates an endogeneity concern. We also provide new insights on the potential of collective efforts by irrigators to manage the resource. We study how heterogeneity in resource and user characteristics affect their individuals' willingness to support efforts to collectively reduce water use. The first chapter estimates how changes in groundwater stocks affect the returns to agricultural land. We avoid bias from feedback effects by exploiting hydrologic variation in pre-development saturated thickness that was determined by natural processes in previous geological eras. Simulation results reveal that the average annual present value of returns to land are expected to decrease in the High Plains region by $120.6 million in 2050, and by $250.5 million in 2100. The most severe decreases in returns to land are expected to occur in Texas, Kansas, and Colorado. When the initial saturated thickness is less than 70 feet, most of the economic impact (63%) of a decrease in the stock of groundwater occurs through an adjustment in irrigated acreage (extensive margin), while 37% occurs through reduced irrigated rental rates (intensive margin). When saturated thickness is larger, nearly all of the response is at the extensive margin. The second chapter examines how observed differences in the stock of groundwater affect corn production. To account for the endogeneity of groundwater stock, we exploit variation in current saturated thickness due to variation in pre-development saturated thickness. Simulation results reveal that the annual production of corn would decrease by 48.1 million bushels in the north portion of the High Plains Aquifer due to a uniform 10 ft decrease in saturated thickness, whereas the annual production of corn would decrease by 15.7 million bushels in the south. Further, we find that when initial saturated thickness is less than 70 ft, most of the impact on corn production of a decrease in the stock of groundwater occurs through an adjustment in irrigated acres in both the north and the south. When saturated thickness is larger than 70 ft, then the adjustment is mostly through a change in cropping patterns on irrigated land in the south but still through irrigated acres in the north. The third chapter uses unique data obtained from consequential stated preference surveys in Kansas to explore the factors that influence farmers preferred reductions in groundwater use through a water conservation program implemented by a Groundwater Management District. Our results reveal that farmers located in areas where the aquifer is more depleted support larger reductions in groundwater use. But we also find that characteristics of the users matter as much or more than the status of the aquifer in determining support. Opposition to reductions in water use are strongest among farmers who strongly agree that water rights are a private property, landlords and those who irrigate a larger proportion of their farm. Further, we evaluate farmers' preferences for the methods of assigning water allocations. We find that none of the options are preferred by a majority of farmers and there is no clear evidence that aquifer characteristics or observed farmer characteristics are the key factors affecting the probability that a farmer ranks a method as the best option. This makes it difficult for groundwater managers to identify which method is more likely to be considered fair by farmers. Our results are informative for managers of water throughout Kansas, the High Plains and other regions where conserving water resources is a high priority and localized and stakeholder-driven conservation plans could be a solution.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1646
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Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 92
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