scholarly journals Owens Valley and the Aqueduct

2013 ◽  
Vol 3 (3) ◽  
pp. 50-59 ◽  
Author(s):  
Kim Stringfellow

This timeline details the economic, social, and environmental impact that the Los Angeles Aqueduct had on the Owens Valley. It begins in the 19th century with the Paiute who lived in the valley, and covers local opposition to the aqueduct and attempts to sabotage it in the 1920s, controversial land sales, depletion of the valley water table, dust at the dry Owens Lake bed, the impact of the Los Angeles Department of Water and Power on the region, the second aqueduct and Mono Lake, the 1991 long-term water agreement, and mitigation efforts including dust control at Owens Lake and the Lower Owens River Project. The material is drawn from Stringfellow's There It Is—Take It! project.

2013 ◽  
Vol 3 (3) ◽  
pp. 82-85
Author(s):  
Graham Chisholm

This essay explores the history of the public trust doctrine for water in California, established in the battle of preserving Mono Lake, and extends the concept to include the responsibility Los Angeles has to restore Owens Lake, an important habitat for migratory birds.


2019 ◽  
Vol 18 (4) ◽  
pp. 1886-1927 ◽  
Author(s):  
Michael L Anderson

Abstract There is strong evidence that short-run fluctuations in air pollution negatively impact infant health and contemporaneous adult health, but there is less evidence on the causal link between long-term exposure to air pollution and increased adult mortality. This project estimates the impact of long-term exposure to air pollution on mortality by leveraging quasi-random variation in pollution levels generated by wind patterns near major highways. I combine geocoded data on the residence of every decedent in Los Angeles over three years, high-frequency wind data, and Census short form data. Using these data, I estimate the effect of downwind exposure to highway-generated pollutants on the age-specific mortality rate by using orientation to the nearest major highway as an instrument for pollution exposure. I find that doubling the percentage of time spent downwind of a highway increases mortality among individuals 75 or older by 3.8%–6.5%. These estimates are robust and imply significant loss of life years.


Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5456
Author(s):  
Paweł Strzałkowski ◽  
Urszula Kaźmierczak

The aim of this article is to present the current knowledge and experiences related to wear and fragmentation resistance tests and to indicate those of their aspects that require further research. For this purpose, a review of the literature was performed. Results show that tests of resistance to wear (the MDE/DS test) and fragmentation (the LA test) are performed worldwide according to different standards (and thus following different test methods), which prevents a comparison of the obtained results. Comparative research into the MDE/DS and LA tests indicates that the MDE/DS test is more effective. The disadvantage of both tests lies in the dimension range of the aggregate. In addition, the use of steel balls in the LA test may not reflect the actual influence that the internal properties of the material have on the fragmentation process. A final review of the available knowledge allowed the formulation of proposals regarding further research directions, such as proposed changes of test methods, extensive analysis, and selection of optimal dimensions for tested aggregates, analysis of short-term and long-term tests, as well as extensive research into and an analysis of the impact of crushing on the physical, mechanical, and geometric properties of aggregates.


Author(s):  
Stacy Hartmann ◽  
Zachary Rubin ◽  
Heidi Sato ◽  
Kelsey O Yong ◽  
Dawn Terashita ◽  
...  

Abstract Across the world, healthcare workers (HCW) are at a greater risk of infection by coronavirus disease 2019 (COVID-19) due to the nature of their work. The Los Angeles County Department of Public Health (LAC DPH) set out to understand the impact of COVID-19 on healthcare facilities and HCWs by tracking and analyzing data from case-patient interviews of HCWs. As of 31 May, over 3 months into the pandemic, nearly 5500 positive HCWs were reported to LAC DPH, representing 9.6% of all cases. Cases reported working in 27 different setting types, including outpatient medical offices, correctional facilities, emergency medical services, and so forth, with the highest proportion from long-term care facilities (46.6%) and hospitals (27.7%). Case patients included both clinical and nonclinical roles, with nearly half (49.4%) of positive HCWs being nurses. Over two-thirds of HCWs (68.6%) worked at some point during their infectious period, and nearly half (47.9%) reported a known exposure to a positive patient and/or coworker within their facility. Overall, compared to all LAC cases, HCWs reported lower rates of hospitalization (5.3% vs 12.2%) and death (0.7% vs 4.3%) from COVID-19. There are many factors that increase HCWs risk of infection, including high-risk work environment, limited supply of personal protective equipment, and even pressure to help and work during a pandemic. In response to these data, LAC DPH created resources and provided guidance for healthcare facilities to best protect their patients and staff during the COVID-19 pandemic.


2019 ◽  
Vol 34 (2) ◽  
pp. 257-275 ◽  
Author(s):  
Tom Rolinski ◽  
Scott B. Capps ◽  
Wei Zhuang

Abstract The criteria used to define Santa Ana winds (SAWs) are dependent upon both the impact of interest (e.g., catastrophic wildfires) and the location and/or time of day examined. We employ a comprehensive definition and methodology for constructing a climatological SAW time series from 1981 through 2016 for two Southern California regions, Los Angeles and San Diego. For both regions, we examine SAW climatology, distinguish SAW-associated synoptic-scale atmospheric patterns, and detect long-term, significant SAW trends. San Diego has 30% fewer SAW days compared to Los Angeles with 80% of SAW events starting in Los Angeles first. Further, 45% of San Diego SAW events are single-day events compared to 35% for Los Angeles. The longest duration event spanned 16 days for Los Angeles (27 November–12 December 1988) and 8 days for San Diego (9–16 January 2009). Although SAW-driven fires can be large and devastating, these types of fires occurred on only 6% and 5% of SAW days for the Los Angeles and San Diego regions, respectively. Finally, we find and investigate an extended period of elevated SAW day count occurring after 2005. This new climatology will allow us to produce month- and season-ahead forecasts of SAW days, which is useful for planning end-of-year staffing coverage by the local, state, and federal fire agencies.


2015 ◽  
Vol 73 (5) ◽  
pp. 1404-1414 ◽  
Author(s):  
Peter Jones ◽  
Alison Cathcart ◽  
Douglas C. Speirs

Abstract In recent years, historical ecologists have turned their attention to the long-term impact of fishing on coastal marine ecosystems in the North Atlantic. Through the examination of non-traditional sources, scientists and scholars are beginning to piece together a clearer picture of ecosystem change over centuries of anthropogenic influence. One aspect of this long-term approach is that data are being recovered from some surprising sources, and, when placed alongside other evidence, are being used to create models of change through time where previously none would have been thought possible. Taking its lead from this work, our research takes a mixed approach to the history of Scotland's regional fisheries in the 19th century, combining the anecdotal evidence of fishers to parliamentary commissions of enquiry with data relating to landings and fishing effort which were gathered by the United Kingdom Fishery Board from 1809 onwards. As a result, it has been possible to calculate catch per unit effort (cpue) for the period between 1845 and the mid-1880s which, when placed alongside the direct evidence of fishers, lead to some unexpected conclusions. In particular, we demonstrate that inshore stocks of commercial whitefish appear to have been in decline by the mid-1850s in some areas, many years before the widespread adoption of beam trawling in Scotland; and we conclude that the most likely reason for this decline is the rapid intensification of fishing from open boats using the traditional techniques of handlines and longlines.


2020 ◽  
Vol 69 ◽  
pp. 194-206
Author(s):  
Mykola Nahirny ◽  

Background: Historiography has long debated the identity of the terms “Ruthenian” and “Ukrainian”. It is obvious that “the Ruthenian” is the historical name of the modern name “the Ukrainian”. However, there are still theories that try to justify the separation of the Ruthenians and the Ukrainians, to recognize the Ruthenians as a separate nation – that is, they promote the ideas of political Rusynism (Ruthenianism). Ukraine's neighbors use a Ruthenian question for their own purposes, primarily to separate the Ruthenians from the Ukrainians in order to assimilate them more quickly. The Ruthenian-Ukrainian community in Croatia did not escape such a problem. The question of political Rusynism is well covered in historiography. However, there are almost no works about political Rusynism in Croatia. Purpose: Consideration of the origin and development of the ideas of political Ruthenianism among immigrants from Ukrainian lands in Croatia and the impact of these ideas on the prospects for the development and existence of both national groups - both Ruthenians and Ukrainians. Results: An immigrants from Ukrainian lands who came to Croatia in the middle of the 18th century identified themselves as the Ruthenians; those who moved here from the end of the 19th century called themselves as the Ukrainians. On the eve of the First World War, russophile tendencies prevailed among the Ruthenians. During the interwar period, contacts between Ukrainian emigrants of various migration waves strengthened. This fact contributed to the spread of the self-name “the Ukrainians”, which coexisted with the name “the Ruthenians”. Post-war attempts to unite the Ruthenians and the Ukrainians into one nationality were unsuccessful. The Yugoslav authorities deliberately separated the Ruthenians and the Ukrainians, and contributed to the formation of the Ruthenian national consciousness. The situation in Croatia was different. Here, the interests of the two ethnic groups were expressed by the Union of Ruthenians and Ukrainians of Croatia (SRiU). The position of the SRiU was that the Ruthenians were traditional, and the Ukrainians were the actual name of the same nation. But there was resistance to such a policy of the Union among the Ruthenians in Croatia. Conservative Ruthenians sought to maintain a certain distance from the Ukrainians. In particular, they held separate festivals, “summer schools” for young people, and used the wording “the Ruthenians and Ukrainians” instead of “the Ruthenians-Ukrainians”. The reason for the recent rise of Ruthenian separatism was the policy of the Croatian government. At the beginning of the 21st century, Croatia, under pressure from the West, adopted a number of pieces of legislation to strengthen the rights of national minorities. The new legislation gave great rights to national minorities (separately to the Ruthenians and separately to the Ukrainians), which leveled the long-standing common policy of the Ruthenian-Ukrainian community. The disputes within the Union resulted in its split and the formation of several separate Ruthenian and Ukrainian organizations. Ruthenian communities promote the preservation of the national identity of the Ruthenians, believing that Ukraine is not their homeland. Thanks to state support, Croatian Ruthenians publish memoirs about the life of their diaspora without mentioning the Ukrainians. Activists of political Rusynism in Croatia accuse Ukraine of assimilating of the Ruthenians, denying a kinship of the Ruthenians and the Ukrainians. Views on a Ruthenian language were also revised. It is believed that its basis is closer to the East Slovak dialect with Ukrainian features. The demarcation with the Ukrainians did not stop the assimilation of the Ruthenians in Croatia. For half a century there has been a steady decline in their numbers. At the same time, the Ruthenian minority is aging, its average age is 50 years. Therefore, the accelerated processes of assimilation among the Ruthenians and the lack of a “mother” state from which they could expect help threaten not only to the long-term dominance of Ruthenian separatism’s idea among the majority of the Ruthenians, but also their survival as a minority. If the Ruthenians of Croatia, in order to save their community, decide to reunite with the Ukrainians, then even under such conditions, the political Rusynism of Croatia also have no prospects for it’s existence. Key words: Croatia, the Ruthenians, the Ukrainians, political Rusynism, assimilation, Union of the Ruthenians of the Republic of Croatia.


2018 ◽  
Vol 49 ◽  
pp. 00005
Author(s):  
Michał Baszeń ◽  
Czesław Miedziałowski

The aim of the paper is to present the state of the building erected in the OWT technology. The construction of the building has not been completed due to the financial problems of the late 90's of the XX century. As a result of the long-term environmental impact, the object was degraded due to the lack of a flat roof and windows. The impact of precipitation, wind and biological corrosion led to significant degradation and deterioration of structural elements and joints. The paper will present examples of damage caused by environmental impacts. Examples of damage of wall and floor elements as well the deeply corroded steel plate joints will be presented. Highly grown lichens, mosses or mold will be also presented as the examples of biological interactions onto the surface of constructional elements. Structural elements have been tested in a nondestructive manner using sclerometer tests. The results will be described and the conclusions will be presented. The analyzed object presents in an interesting manner that environmental influences could destructively affect the construction of precast RC structural elements, which constitute a significant percentage of the Polish construction market.


2013 ◽  
Vol 3 (3) ◽  
pp. 60-67
Author(s):  
Ron Nichols

An interview with Ron Nichols, director of the Los Angeles Department of Water and Power surveys the past, present, and future of the Los Angeles Aqueduct, the department's relationship with Owens Valley, restoration of Owens Lake, the role of the department and its unions in city politics, climate change and the challenges ahead.


2020 ◽  
Vol 123 (1) ◽  
pp. 177-189
Author(s):  
Andreas Bschaden ◽  
Eduardo Mandarano ◽  
Nanette Stroebele-Benschop

PurposeMeat consumption causes a large amount of global greenhouse gas emissions and other environmental problems. Studies showed that consumers underestimate the environmental impact of meat consumption compared to other food-related behaviours. A video intervention was conducted to investigate the effect of information on consumers' perception and behaviour.Design/methodology/approachTwo didactically different videos about meat and the environment and a control video were shown to 189 participants. Ratings about the environmental impact of different food-related behaviours as well as participants' meat consumption frequency were obtained directly before, one week later and one year after the screening by self-report questionnaires.FindingsMean rating of the environmental impact of meat consumption was second to the least important of the different food consumption patterns. In the first intervention group, the rating increased significantly (p = 0.001) after having watched the video. There was no such effect in the second intervention or the control group. Self-reported meat consumption frequency did not change significantly in any of the groups. No long-term differences between the groups could be found.Research limitations/implicationsThe results suggest that there is still a lack of knowledge concerning the environmental impact of meat consumption. Providing information can affect awareness, depending on the type of information delivery. The circumstances under which information encourages behaviour change need to be further explored.Originality/valueThis is the first study that investigated the impact of different videos about environmental impacts of meat consumption on consumer perceptions and behaviour.


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