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New, Innovative Approaches to Dust Control Needed at Owens Lake, Report Says | |
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2020-02-26 | |
发布年 | 2020 |
语种 | 英语 |
国家 | 美国 |
领域 | 资源环境 |
正文(英文) |
New, Innovative Approaches to Dust Control Needed at Owens Lake, Report SaysWASHINGTON – A new report from the National Academies of Sciences, Engineering, and Medicine finds new and innovative approaches to dust control are needed at Owens Lake, California, to improve air quality, reduce water use, and preserve habitats. Effectiveness and Impacts of Dust Control Measures for Owens Lake says while much progress has been made in improving air quality through dust control, none of the dust control methods currently in use at the lake meet the mandated levels of air quality while also addressing concerns about water use and environment. Existing dust control measures are dominated by methods that use large amounts of water, such as shallow flooding. The report recommends future research examine individual and hybrid dust control methods and develop new approaches for planning and evaluating the use of those methods. Owens Lake used to cover about 100 square miles, until water was diverted from the Owens River in 1913 to bring water to the city of Los Angeles. The diversion caused large portions of the lake bed to dry out, and today it covers less than one-third of its former area. Before dust controls were implemented, the exposed lakebed produced large amounts of dust under high winds, resulting in the highest concentrations anywhere in the U.S. of airborne PM10, or particulate matter with a diameter of 10 micrometers or less. The Los Angeles Department of Water and Power (LADWP) has spent $2.1 billion on dust control efforts as of May 2019, mostly in the form of shallow flooding of the lake, which is used on about 62 percent of the dust control areas on the lakebed. In a 2014 stipulated judgment, LADWP and the Great Basin Unified Air Pollution Control District (GBUAPCD) agreed to rely less on shallow flooding for dust control and to investigate new, refined methods that reduce water use. The stipulated judgment also directed that the National Academies evaluate the effectiveness of alternative dust control efforts, taking water use, cost, reliability, durability, and environmental impacts into account. “Much progress has already been made in controlling dust at Owens Lake,” said David Allen, director of the Center for Energy and Environmental Resources at the University of Texas at Austin, and chair of the panel that wrote the report. “However, our report finds that Owens Lake needs innovative solutions that not only control dust to meet air quality standards but use less water and meet the needs of the local environment as well.” Contact: Megan Lowry, Media Relations Officer |
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来源平台 | The National Academies of Sciences Engineering Medicine |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/272265 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | admin. New, Innovative Approaches to Dust Control Needed at Owens Lake, Report Says. 2020. |
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