Impacts of Variable Climate and Effluent Flows on the United States-Mexico Transboundary Santa Cruz Aquifer

2020 ◽  
Author(s):  
Elia Tapia ◽  
Eylon Shamir ◽  
Sharon Megdal
Keyword(s):  
United States ◽  
Water Budget ◽  
The United States ◽  
Border Region ◽  
Santa Cruz ◽  
Budget Model ◽  
Effluent Discharge ◽  
Groundwater Demand ◽  
The U.S

<p>The Transboundary Santa Cruz Aquifer (TSCA) is located in Northwestern Mexico and Southwestern United States (U.S.). Groundwater from the transboundary aquifer is being shared by the states of Arizona in the U.S. and Sonora in Mexico; particularly by the cities of Nogales, Arizona and Nogales, Sonora. The Arizona-Sonora border region is subject to climate uncertainties, limited water availability, and water quality issues. The objective of this study is to assess the impacts of changes in groundwater demand, effluent discharge, and climate uncertainties within the TSCA. Groundwater recharge in the TSCA is highly sensitive to climate uncertainties and physical water and wastewater transfers from both the U.S. and Mexico. Perennial flows in the area depend on the effluent discharges from both the U.S. and Mexico. Population growth and residential construction have increased groundwater demand in the area, in addition to wastewater treatment and sanitation demands. These human activities, coupled with climate uncertainties and possible reductions to effluent discharge, influence the hydrology of the area. We use a conceptual water budget model to analyze the long-term impact of the different components of potential recharge and water losses within the aquifer, including changes in projected climate that are based on three downscaled CMIP5 RCP8.5 Global Climate Models. Water budget model simulations for most effluent discharge and groundwater pumping scenarios reflected groundwater deficit. Additionally, climate projections showed variations that range from severe long-term drying to positive wetting. This research improves the understanding of the impact of climate uncertainties and water management decisions on water sustainability, with an accessible methodology that can be globally applied.</p>

THE INFLUENCE OF SCOTTISH ACCOUNTANTS IN THE UNITED STATES: THE EARLY CASE OF THE SOCIETY OF ACCOUNTANTS IN EDINBURGH

1997 ◽  
Vol 24 (1) ◽  
pp. 117-141 ◽  
Author(s):  
T. A. LEE
Keyword(s):  
United States ◽  
General Theory ◽  
Research Program ◽  
The United States ◽  
The World ◽  
Early Case ◽  
The Impact ◽  
Chartered Accountants ◽  
The U.S

This study represents part of a long-term research program to investigate the influence of U.K. accountants on the development of professional accountancy in other parts of the world. It examines the impact of a small group of Scottish chartered accountants who emigrated to the U.S. in the late 1800s and early 1900s. Set against a general theory of emigration, the study's main results reveal the significant involvement of this group in the founding and development of U.S. accountancy. The influence is predominantly with respect to public accountancy and its main institutional organizations. Several of the individuals achieved considerable eminence in U.S. public accountancy.

Concrete Biodeterioration in the U.S.-Mexico Border Region

2010 ◽  
Vol 1278 ◽  
Author(s):  
L. E. Rendon ◽  
M. E. Lara ◽  
S. K. Rendon ◽  
M. Rendon ◽  
X. Li
Keyword(s):  
United States ◽  
Arid Region ◽  
Mexican American ◽  
Groundwater Resources ◽  
The United States ◽  
Border Region ◽  
Hardened Concrete ◽  
Mexico Border ◽  
The U.S ◽  
Sewage Systems

AbstractConcrete biodeterioration is defined as the damage that the products of microorganism metabolism, in particular sulfuric acid, do to hardened concrete. In Canada and in the northern part of the United States, sewer failures from concrete biodeterioration are almost unknown. In the southern part of the United States and in Mexico, however, it is a serious and expensive problem in sewage collection systems, which rapidly deteriorate. Also, leaking sewage systems result in the loss of groundwater resources particularly important in this arid region. Almost every city in the Mexican-American border region, who's combined population is more than 15 million people, faces this problem. The U.S. cities have made some provision to face these infrastructure problems, but the Mexican cities have made less effort. We recommend here the Mexican norm (NMX-C-414-ONNCCE-2004) [1] to be reviewed, or at least that a warning be issued as a key measure to avoid concrete biodeterioration.

scholarly journals Sample-Selection Biases and the Industrialization Puzzle

2017 ◽  
Vol 77 (1) ◽  
pp. 171-207 ◽  
Author(s):  
Howard Bodenhorn ◽  
Timothy W. Guinnane ◽  
Thomas A. Mroz
Keyword(s):  
United States ◽  
Selection Bias ◽  
Meta Analysis ◽  
Sample Selection ◽  
Well Being ◽  
The United States ◽  
Compelling Evidence ◽  
Long Term Changes ◽  
The U.S

Understanding long-term changes in human well-being is central to understanding the consequences of economic development. An extensive anthropometric literature purports to show that heights in the United States declined between the 1830s and the 1890s, which is when the U.S. economy modernized. Most anthropometric research contends that declining heights reflect the negative health consequences of industrialization and urbanization. This interpretation, however, relies on sources subject to selection bias. Our meta-analysis shows that the declining height during industrialization emerges primarily in selected samples. We also develop a parsimonious diagnostic test that reveals, but does not correct for, selection bias in height samples. When applied to four representative height samples, the diagnostic provides compelling evidence of selection.

Youth Negotiate Deportation

2019 ◽  
pp. 135-146
Author(s):  
Lauren Heidbrink
Keyword(s):  
United States ◽  
Young People ◽  
The United States ◽  
Children And Youth ◽  
Ethnographic Research ◽  
Institutional Practices ◽  
Unaccompanied Children ◽  
Forced Return ◽  
The U.S

This chapter chronicles how young people experience deportation from the United States to Guatemala. It examines the policies and institutional practices that govern the removal of unaccompanied children and trace the ways in which young people and their families understand and navigate these policies and practices. Through multi-sited ethnographic research in the United States and Guatemala, the chapter reveals the various impacts of the forced “repatriation” of children, exacerbating the very conditions that spurred their migration and causing new interrelated uncertainties and related risks as “deportees.” As they are physically expelled from the United States, deported young people move out of U.S. legal systems. The effects of a forced “return” to their nations of origin produce new challenges such as feelings of isolation and vulnerability as well as danger, such that, in many ways, they continue to be in and moving through regimes of illegality. Demonstrating the long-term and geographically distant effects of the U.S. government’s deportation of children and youth, the chapter outlines the confining character of being out of a system, especially if once in it.

Future Warfare in the Western Pacific: Chinese Antiaccess/Area Denial, U.S. AirSea Battle, and Command of the Commons in East Asia

2016 ◽  
Vol 41 (1) ◽  
pp. 7-48 ◽  
Author(s):  
Stephen Biddle ◽  
Ivan Oelrich
Keyword(s):  
United States ◽  
The United States ◽  
Western Pacific ◽  
New Era ◽  
Global Commons ◽  
The Commons ◽  
Sphere Of Influence ◽  
The Western Pacific ◽  
The U.S

Many analysts worry that improvements in Chinese missile, sensor, guidance, and other technologies will enable China to deny the U.S. military access to parts of the Western Pacific that the United States has long controlled. Although these “antiaccess, area denial” (A2/AD) capabilities are real, they are a geographically limited long-term threat. As both the United States and China deploy A2/AD capabilities, a new era will emerge in which the U.S. military no longer enjoys today's command of the global commons, but is still able to deny China military hegemony in the Western Pacific. In this new era, the United States will possess a sphere of influence around allied landmasses; China will maintain a sphere of influence over its own mainland; and a contested battlespace will cover much of the South and East China Seas wherein neither power enjoys wartime freedom of surface or air movement. This in turn suggests that the Chinese A2/AD threat to U.S. allies is real but more limited than often supposed. With astute U.S. choices, most U.S. allies in this new system will be imperfectly, but substantially, secure.

Just-in-Time Purchasing: A Challenge for U.S. Industry

1983 ◽  
Vol 26 (1) ◽  
pp. 54-68 ◽  
Author(s):  
Richard J. Schonberger ◽  
James P. Gilbert
Keyword(s):  
United States ◽  
Market Share ◽  
Structural Changes ◽  
Sole Source ◽  
The United States ◽  
Just In Time ◽  
Supplier Relationships ◽  
Lower Material ◽  
The U.S

Traditional U.S. purchasing is under assault. Japanese purchasing practices, featuring frequent “just-in-time” deliveries in small quantities, have made inroads among Japanese subsidiaries in the United States and more recently in the U.S. auto industry. Just-in-time (JIT) buying tends to be accompanied by a host of structural changes: Long-term, stable buyer-supplier relationships; avoidance of annual rebidding; sole-source contracts; improved containerization; and localized buying, to name just a few. The benefits of JIT purchasing, to both buyer and supplier, include lower material costs, higher productivity, and improved qualify. The strategic advantages—growth of market share and stable relationships—can be significant. Geographical vastness is one of several obstacles in the way of widespread use of JIT buying practices in the United States. The companies that have pioneered in the development of JIT purchasing in this country have demonstrated that most of the obstacles are not insurmountable.

scholarly journals Tweeting to Prepare: An Examination of Government and Organizational Messages during National Preparedness Month

2019 ◽  
Vol 2 (2019) ◽  
pp. 15-17
Author(s):  
Jenna Currie-Mueller
Keyword(s):  
United States ◽  
Social Media ◽  
The United States ◽  
Government Organizations ◽  
Impact Area ◽  
Response Phase ◽  
National Preparedness ◽  
The U.S ◽  
Community Infrastructure

Each year, disasters have devastating consequences in the United States. Consequences are long term and extend beyond the disaster’s immediate impact area. Establishing a culture of preparedness is necessary for the U.S. A prepared populace responds more effectively to disasters and is less stressful on community infrastructure and resources during the response phase. One of the ways government organizations and non-government organizations can encourage preparedness actions is via social media. This study examined preparedness messages existing independently of an emerging event disseminated on Twitter by government and non-government organizations. A total of 6,374 tweets were analyzed from data collected during National Preparedness Month. Tweets were analyzed for preparedness content and whether efficacy was included in preparedness messages.

The Representation of the U.S.-Mexico Border in Television News: Textual Analysis on Bodies and Security Enforcement

2019 ◽  
Vol 15 (29) ◽  
Author(s):  
David Gonzalez Hernandez
Keyword(s):  
United States ◽  
Textual Analysis ◽  
Television News ◽  
The United States ◽  
Border Region ◽  
Local Network ◽  
News Reports ◽  
Mexico Border ◽  
United States Mexico ◽  
The U.S

This article analyzes how television news has enhanced the role of representation of the United States-Mexico border in themes such as immigration, theme represented in “spectacular” ways related to “warfare”. Using textual analysis on TV reports, my aim is to show how local television network news in the United States (NBC) and Mexico (Televisa) construct the representation of the U.S./Mexico border through a particular conflicting vision to account for border enforcements and interventions on both sides and with similar visual strategies. The analysis centers on actual “visual text” or television news reports, which tries to demonstrates how assumptions guide the activity of local network coverage, and how, at the same time, limits what is reported in news. This consequently contributes to the perpetuation of a representation related to ¨crisis¨ in the border region.

scholarly journals Northwestward Cropland Expansion and Growing Urea-Based Fertilizer Use Enhanced NH<sub>3</sub> Emission Loss in the Contiguous United States

2020 ◽  
Author(s):  
Peiyu Cao ◽  
Chaoqun Lu ◽  
Jien Zhang ◽  
Avani Khadilkar
Keyword(s):  
United States ◽  
The United States ◽  
N Fertilizer ◽  
Spatiotemporal Patterns ◽  
Fertilizer Management ◽  
Fertilizer Use ◽  
Nh3 Emission ◽  
The U.S

Abstract. The increasing demands of food and biofuel have promoted century-long cropland expansion and nitrogen (N) fertilizer enrichment in the United States. However, the role of such long-term human activities in influencing the spatiotemporal patterns of Ammonia (NH3) emission remains poorly understood. Based on an empirical model including climate, soil properties, N fertilizer management, and cropland distribution history, we have quantified monthly fertilizer-induced NH3 emission across the contiguous U.S. from 1900 to 2015. Our results show that N fertilizer-induced NH3 emission in the U.S. has increased from

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