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61.
Sapucci Gabriela Ribeiro Negri Rogério Galante Casaca Wallace Massi Klécia Gili 《Environmental Modeling and Assessment》2021,26(4):581-590
Environmental Modeling & Assessment - Over the past decades, the Southeast Atlantic Forest in Paraíba do Sul River Valley has suffered intense deforestation and human disturbances. Due to... 相似文献
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John J. Kalvinskas Wallace A. Moser Thomas E. Bullock 《Journal of the American Water Resources Association》1971,7(2):330-342
. Water Reservoir Systems were investigated for urban areas as an alternative or complement to storm water drainage systems for flood control which could provide benefits in water conservation and reduce drainage system costs. The study consisted of: (1) gathering of engineering data on the topographical, hydrological, and precipitation characteristics of the area and urban development and economic statistics 相似文献
64.
Howard-Reed C Wallace LA Ott WR 《Journal of the Air & Waste Management Association (1995)》2002,52(2):147-159
More than 300 air change rate experiments were completed in two occupied residences: a two-story detached house in Redwood City, CA, and a three-story townhouse in Reston, VA. A continuous monitor was used to measure the decay of SF6 tracer gas over periods of 1-18 hr. Each experiment first included a measurement of the air change rate with all exterior doors and windows closed (State 0), then a measurement with the single change from State 0 conditions of opening one or more windows. The overall average State 0 air change rate was 0.37 air changes per hour (hr(-1)) (SD = 0.10 hr(-1); n = 112) for the California house and 0.41 hr(-1) (SD = 0.19 hr(-1); n = 203) for the Virginia house. Indoor/outdoor temperature differences appeared to be responsible for the variation at the Virginia house of 0.15-0.85 hr(-1) when windows were closed. Opening a single window increased the State 0 air change rate by an amount roughly proportional to the width of the opening, reaching increments as high as 0.80 hr(-1) in the California house and 1.3 hr(-1) in the Virginia house. Multiple window openings increased the air change rate by amounts ranging from 0.10 to 2.8 hr(-1) in the California house and from 0.49 to 1.7 hr(-1) in the Virginia house. Compared with temperature differences and wind effects, opening windows produced the greatest increase in the air change rates measured in both homes. Results of this study indicate the importance of occupant window-opening behavior on a home's air change rate and the consequent need to incorporate this factor when estimating human exposure to indoor air pollutants. 相似文献
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66.
Stephen B. Allen John P. Dwyer Douglas C. Wallace Elizabeth A. Cook 《Journal of the American Water Resources Association》2003,39(4):923-933
ABSTRACT. We investigated the relationships between levee damage and woody corridor along a 353‐mile segment of the Missouri River in Missouri during the flood of 1993. Results indicated that woody corridors between riverbanks and primary levees played a significant role in the reduction or prevention of flood related damage to levees. Forty‐one percent of levee failures in this segment occurred in areas with no woody corridor, while 74 percent and 83 percent of failures occurred where woody corridor widths were less than 300 feet and less than 500 feet, respectively. Median failure lengths with a woody corridor present were 50.3 percent shorter than median failure lengths with no woody corridor present. Levees without failures had significantly wider median woody corridor widths than levees that failed. Eligibility for the Corps of Engineers levee maintenance program was not a significant factor in the reduction of levee damage. Discontinuities in woody corridors played a role in 27.5 percent of the levee failures in the study segment. Smaller segments of the river valley were studied to determine if geomorphic differences influenced variations in the protective value of woody corridors. 相似文献
67.
This paper describes the progress that local authorities in England and Wales are making in adapting to the threat of climate change and taking action to reduce greenhouse gas emissions. The responses from surveys of local authorities in England and Wales carried out in 2000 (IDeA, Reducing Greenhouse Gas Emissions: survey of activities and initiatives by local authorities. (Questionnaire and results) Improvement and Development Agency, 2000) and 2002 (Allman et al., Climate Change: a survey of local authorities, Local Government Association, 2002) were compared. Progress in implementing the International Council for Local Environmental Initiatives (ICLEI) five-step methodology (ICLEI, Local Government Implementation of Climate Protection—report to the United Nations, International Council for Local Environmental Initiatives, 1997) was used to identify the 'successful' local authorities. The barriers faced by these authorities were then compared with those faced by the remaining local authorities.
Most local authorities are not making substantial progress. However, a small number have successfully prepared greenhouse gas emissions inventories, developed strategies and implemented adaptation and greenhouse gas reduction measures. These successful authorities have made progress despite the fact that addressing climate change is not a legal requirement.
Their success is due to three key factors. Firstly, they have recognised the secondary benefits of tackling climate change, e.g. potential employment, improved quality of life and reduction in fuel poverty. Secondly, they have the strong political, professional and technical support necessary to champion climate change activities. Finally, they have worked in partnership with utilities, private, public and voluntary groups to raise the finance needed to implement measures both to adapt to climate change and to reduce greenhouse gas emissions. 相似文献
Most local authorities are not making substantial progress. However, a small number have successfully prepared greenhouse gas emissions inventories, developed strategies and implemented adaptation and greenhouse gas reduction measures. These successful authorities have made progress despite the fact that addressing climate change is not a legal requirement.
Their success is due to three key factors. Firstly, they have recognised the secondary benefits of tackling climate change, e.g. potential employment, improved quality of life and reduction in fuel poverty. Secondly, they have the strong political, professional and technical support necessary to champion climate change activities. Finally, they have worked in partnership with utilities, private, public and voluntary groups to raise the finance needed to implement measures both to adapt to climate change and to reduce greenhouse gas emissions. 相似文献
68.
69.
Lance A. Wallace 《Environment international》1981,5(2):73-75
Within the last two years, great progress has been made in the field of personal air quality monitors. Improvements in pump design, miniaturization, adsorption techniques, and new collection principles have produced about a dozen sensitive monitors capable of being used by the general public to measure their normal everyday exposure to many toxic or carcinogenic compounds. This article reviews recent progress in this field, particularly as it relates to U.S. Environmental Protection Agency programs. 相似文献
70.
Cerumen, or propolis, is a mixture of plant resins enriched with bee secretions. In Australia, stingless bees are important
pollinators that use cerumen for nest construction and possibly for colony’s health. While extensive research attests to the
therapeutic properties of honeybee (Apis mellifera) propolis, the biological and medicinal properties of Australian stingless bee cerumen are largely unknown. In this study,
the chemical and biological properties of polar extracts of cerumen from Tetragonula carbonaria in South East Queensland, Australia were investigated using gas chromatography-mass spectrometry (GC-MS) analyses and in
vitro 5-lipoxygenase (5-LOX) cell-free assays. Extracts were tested against comparative (commercial tincture of A. mellifera propolis) and positive controls (Trolox and gallic acid). Distinct GC-MS fingerprints of a mixed diterpenic profile typical
of native bee cerumen were obtained with pimaric acid (6.31 ± 0.97%, w/w), isopimaric acid (12.23 ± 3.03%, w/w), and gallic
acid (5.79 ± 0.81%, w/w) tentatively identified as useful chemical markers. Characteristic flavonoids and prenylated phenolics
found in honeybee propolis were absent. Cerumen extracts from T. carbonaria inhibited activity of 5-LOX, an enzyme known to catalyse production of proinflammatory mediators (IC50 19.97 ± 2.67 μg/ml, mean ± SEM, n = 4). Extracts had similar potency to Trolox (IC50 12.78 ± 1.82 μg/ml), but were less potent than honeybee propolis (IC50 5.90 ± 0.62 μg/ml) or gallic acid (IC50 5.62 ± 0.35 μg/ml, P < 0.001). These findings warrant further investigation of the ecological and medicinal properties of this stingless bee cerumen,
which may herald a commercial potential for the Australian beekeeping industry. 相似文献