Community volunteer assessment of recreational water quality in the Hutt River,Wellington     

Amanda E. Valois  Juliet R. Milne  Mark W. Heath  Rob J. Davies-Colley  Emily Martin  Rebecca Stott 《新西兰海洋与淡水研究杂志》2020,54(2):200-217

ABSTRACT

Water is an important component of many recreational opportunities and New Zealand invests significant resources in recreational water quality (RWQ) monitoring to assess risks to public health. However, monitoring primarily focuses on microbiological hazards and RWQ is considerably broader than this. The goal of this study was to take a comprehensive approach to evaluating RWQ while exploring the potential for greater public involvement in monitoring. A popular river swimming site was co-monitored weekly by volunteers and a council field officer. The attributes monitored–water temperature, visual clarity, benthic cyanobacteria and filamentous periphyton cover, E. coli and rubbish–were identified from a volunteer workshop. There was good concordance between volunteer and council data suggesting that volunteer measurements can be considered reliable. This highlights the potential for volunteers, with professional support, including training and quality assurance, to extend council RWQ surveillance to additional monitoring sites while improving public engagement on water management.  相似文献   

Social and Geographic Contexts of Water Concerns in Utah     

Courtney G. Flint  Xin Dai  Douglas Jackson-Smith  Joanna Endter-Wada  Sara K. Yeo  Rebecca Hale 《社会与自然资源》2017,30(8):885-902

Public concerns about water issues are key considerations in responding to changing hydrologic conditions. Literature is mixed on the social profiles associated with resource-related risks. Using data from a household survey, we compare concerns about water shortage, climate change impacts on water supply, poor water quality, and flooding. We assess the combined influence of social and locational factors on each concern and variations across three valleys in northern Utah. Generalized linear mixed modeling is used, given the ordinal nature of most variables. Water shortage was the greatest concern, and female, older, nonwhite, and recreationally active respondents were generally more concerned about water issues than their counterparts. Education, income, and religious identity presented more complicated relationships with water concerns, with significant interaction effects with valley geography. This study has implications for improving public involvement in risk management and engendering support for future water policy and planning strategies to address these risks.  相似文献   

Migration and Development? The Gendered Costs of Migration on Mexico's Rural “Left Behind”          下载免费PDF全文

Rebecca M. Torres  Lindsey Carte 《Geographical review》2016,106(3):399-420

Governments, civil society, and policymakers assert the potential of international migration to foster development and alleviate poverty. Often such claims are rooted in macroscale geopolitical analyses of migration and development, which mask the localized, uneven, and embodied ways family members “left behind” bear the costs and subsidize the U.S./Mexico (inter)national integration project. Informed by feminist geopolitics, this article demonstrates how the left behind disproportionately bear the hidden costs of neoliberal restructuring and migration. We draw upon Mexican Migration Project (MMP) ethnosurvey data to frame the narratives of migrant family members left behind. Narratives were constructed through in‐depth interviews conducted in rural Veracruz. We conclude that in the absence of geographically specific examinations of the hidden costs associated with neoliberal development and migration it is possible that “migration for development” programs and policies may exacerbate inequities that will perpetuate migration and further weaken Mexican origin communities.  相似文献   

Giant Maps as Pedagogical Tools for Teaching Geography and Mathematics     

Peter Anthamatten  Lara M. P. Bryant  Beverly J. Ferrucci  Steve Jennings  Rebecca Theobald 《The Journal of geography》2018,117(5):183-192

Giant maps offer a potentially useful pedagogical tool for teaching mathematics and map skills. In this pilot study, giant maps were distributed to elementary schools in Colorado and New Hampshire and teachers were provided with guided activities designed to integrate mathematics and geography skills. In an assessment of student skills, it was found that there were improvements in map-use skills and that students improved in some skills more than others. Additionally, there were differences in gender; girls improved more in their scores for some skills and less than boys in others. The teaching benefits of giant maps merit additional investigation.  相似文献   

Natural Resource Access Rights and Wrongs: Nontimber Forest Products Gathering in Urban Environments     

Susan Charnley  Rebecca J. McLain  Melissa R. Poe 《社会与自然资源》2018,31(6):734-750

This article uses research about non-timber forest products (NTFP) gathering in Seattle, Washington, USA to examine how people gain access to natural resources in urban environments. Our analysis focuses on gathering in three spaces: parks, yards, and public rights of way. We present a framework for conceptualizing access, and highlight cognitive mechanisms of access associated with foragers’ internal moral judgments about harvesting. Key findings are: (1) internal moral calculations about whether it is right or wrong to harvest a particular NTFP in a particular place are an important but previously unacknowledged mechanism governing resource access; and (2) these calculations may help prevent over-harvesting of NTFPs, which are common pool resources, in urban environments where social and environmental conditions lend themselves to a de facto situation of open access. Our findings suggest that voluntary codes of conduct may be the best way to manage NTFP access in cities.  相似文献   

Surface water–groundwater exchange dynamics in a tidal freshwater zone          下载免费PDF全文

Cole T. Musial  Audrey H. Sawyer  Rebecca T. Barnes  Samuel Bray  Deon Knights 《水文研究》2016,30(5):739-750

In coastal rivers, tides can propagate for tens to hundreds of kilometres inland beyond the saltwater line. Yet the influence of tides on river–aquifer connectivity and solute transport in tidal freshwater zones (TFZs) is largely unknown. We estimate that along the TFZ of White Clay Creek (Delaware, USA), 11% of river water exchanges through tidal bank storage zones. Additional hyporheic processes such as flow through bedforms likely contribute even more exchange. The turnover length associated with tidal bank storage is 150 km, on the order of turnover lengths for all hyporheic exchange processes in non‐tidal rivers of similar size. Based on measurements at a transect of piezometers located 17 km from the coast, tides exchange 0.36 m³ of water across the banks and 0.86 m³ across the bed per unit river length. Exchange fluxes range from ?1.66 to 2.26 m day^?1 across the bank and ?0.84 to 1.88 m day^?1 across the bed. During rising tide, river water infiltrates into the riparian aquifer, and the downstream transport rate in the channel is low. During falling tide, stored groundwater is released to the river, and the downstream transport rate in the channel increases. Tidal bank storage zones may remove nutrients or other contaminants from river water and attenuate nutrient loads to coasts. Alternating expansion and contraction of aerobic zones in the riparian aquifer likely influence contaminant removal along flow paths. A clear need exists to understand contaminant removal and other ecosystem services in TFZs and adopt best management practices to promote these ecosystem services. Copyright © 2015 John Wiley & Sons, Ltd.  相似文献   

Aspect control of water movement on hillslopes near the rain–snow transition of the Colorado Front Range          下载免费PDF全文

Eve‐Lyn S. Hinckley  Brian A. Ebel  Rebecca T. Barnes  Robert S. Anderson  Mark W. Williams  Suzanne P. Anderson 《水文研究》2014,28(1):74-85

In the Colorado Front Range, forested catchments near the rain–snow transition are likely to experience changes in snowmelt delivery and subsurface water transport with climate warming and associated shifts in precipitation patterns. Snowpack dynamics are strongly affected by aspect: Lodgepole pine forested north‐facing slopes develop a seasonal snowpack, whereas Ponderosa pine‐dotted south‐facing slopes experience intermittent snow accumulation throughout winter and spring. We tested the degree to which these contrasting water input patterns cause different near‐surface hydrologic response on north‐facing and south‐facing hillslopes during the snowmelt period. During spring snowmelt, we applied lithium bromide (LiBr) tracer to instrumented plots along a north–south catchment transect. Bromide broke through immediately at 10‐ and 30‐cm depths on the north‐facing slope and was transported out of soil waters within 40 days. On the south‐facing slope, Br^? was transported to significant depths only during spring storms and remained above the detection limit throughout the study. Modelling of unsaturated zone hydrologic response using Hydrus‐1D corroborated these aspect‐driven differences in subsurface transport. Our multiple lines of evidence suggest that north‐facing slopes are dominated by connected flow through the soil matrix, whereas south‐facing slope soils experience brief periods of rapid vertical transport following snowmelt events and are drier overall than north‐facing slopes. These differences in hydrologic response were largely a function of energy‐driven differences in water supply, emphasizing the importance of aspect and climate forcing when considering contributions of water and solutes to streamflow in catchments near the snow line. Copyright © 2012 John Wiley & Sons, Ltd.  相似文献   

Distributional change of monthly precipitation due to climate change: comprehensive examination of dataset in southeastern United States          下载免费PDF全文

Hui Wang  Rebecca Killick  Xiang Fu 《水文研究》2014,28(20):5212-5219

A number of watersheds are selected from the Hydro‐Climate Data Network over southeastern United States to examine possible changes in hydrological time series, e.g. precipitation, introduced by changing climate. Possible changes in monthly precipitation are examined by three different methods to detect second order stationarity, abrupt changes in the variance and smooth changes in quantiles of the time series. An analysis of second order stationarity shows that precipitation in eight of the 56 watersheds display nonstationary behaviour. Change‐point analyses reveal that changes in the long‐term variance of monthly precipitation are only detected for a few sites. As a complementary analysis tool, quantile regression aims to detect potential changes of different percentiles of the monthly precipitation over time. Several sites show diverging trends in the quantiles, which implies that the range and thus variance of the data, is increasing. As distinct change‐points are not identified, this suggests that the effect is small and cumulative. Results are analysed in detail, and possible explanations are provided. This type of thorough analysis provides a basis for understanding the possible redistribution of water cycle. It also provides implications for water resources management and hydrological engineering facility design and planning. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

Volunteer health and emotional wellbeing in marine protected areas     

Rebecca Sarah Koss  Jonathon ‘Yotti’ Kingsley 《Ocean & Coastal Management》2010,53(8):447-453

Citizen science monitoring programs in the marine environment frequently focus on volunteer collected data precision for conservation and resource use of marine biota. Few studies have examined the social science aspects of volunteer engagement in marine monitoring programs in a quantifiable manner. This research focuses on emotional attitudes of Sea Search volunteers who monitor Marine National Parks and Marine Sanctuaries in Victoria, Australia. Volunteers responded that their participation in Sea Search activities made them feel good emotionally and mentally, with active learning, such as remembering names of marine biota, stimulating brain activity and memory. Volunteer monitoring efforts generated personal satisfaction through their contributions, feelings of enjoyment, and socialising with others. Sea Search volunteers gain a sense of want to protect and conserve the marine environment through positive behaviour change. By understanding and having a sense of meaning towards the marine environment, the volunteers felt a sense of pride in themselves. The concepts of volunteer connection to the natural environment and positive mental and emotional health are important for any citizen science monitoring program and should be used in the program’s aims and strategies as an effective means to attract volunteers. A functional framework which clearly communicates and assesses not only the scientific expectations from a citizen science program, but also the health and wellbeing connections to nature, need to be addressed in Government marine and coastal strategies.  相似文献   

Boron isotopes in tourmaline as a tracer of metasomatic processes in the Bamble sector of Southern Norway     

R.?BastEmail author  E.?E.?Scherer  K.?Mezger  H.?Austrheim  T.?Ludwig  H.?R.?Marschall  A.?Putnis  K.?L?wen 《Contributions to Mineralogy and Petrology》2014,168(4):1069

The Bamble sector of southern Norway comprises metagabbros and metasediments that were metasomatically altered to various extents during a late stage of the Sveconorwegian orogeny (~1.06 Ga). The infiltration of highly saline brines along veins led to penetrative scapolitization and albitization on a regional scale and the local deposition of Fe–Ti oxides. Typical secondary mineral assemblages include either scapolite + apatite + amphibole + phlogopite + tourmaline, or albite + epidote + calcite + chlorite + white mica, indicating that the fluids introduced large amounts of Na, Cl, Mg, Ca, K, P, and B to the system. Metasomatic tourmalines associated with different alteration stages as identified by variations in major-element composition and initial ⁸⁷Sr/⁸⁶Sr were analyzed for B isotopic compositions to constrain possible sources and the evolution of the hydrothermal fluid(s). Measured δ¹¹B values range from ?5 to +27 ‰ relative to SRM-951, suggesting marine evaporites interlayered with various amounts of continental detritus and pelagic clay as a possible B source reservoir. The influence of a seawater-derived component is clearly indicated by the heavy B isotope signature of tourmaline related to Al–Mg-rich metapelites. In contrast, negative δ¹¹B values can be explained by the influence of pneumatolytic fluids associated with granitic pegmatites. On a regional scale (i.e., several km), δ¹¹B values in tourmaline vary widely, whereas variations within a single outcrop (tens of m) are typically small and can be ascribed to different generations of tourmaline related to several fluid pulses.  相似文献