Headwater Influences on Downstream Water Quality

We investigated the influence of riparian and whole watershed land use as a function of stream size on surface water chemistry and assessed regional variation in these relationships. Sixty-eight watersheds in four level III U.S. EPA ecoregions in eastern Kansas were selected as study sites. Riparian land cover and watershed land use were quantified for the entire watershed, and by Strahler order. Multiple regression analyses using riparian land cover classifications as independent variables explained among-site variation in water chemistry parameters, particularly total nitrogen (41%), nitrate (61%), and total phosphorus (63%) concentrations. Whole watershed land use explained slightly less variance, but riparian and whole watershed land use were so tightly correlated that it was difficult to separate their effects. Water chemistry parameters sampled in downstream reaches were most closely correlated with riparian land cover adjacent to the smallest (first-order) streams of watersheds or land use in the entire watershed, with riparian zones immediately upstream of sampling sites offering less explanatory power as stream size increased. Interestingly, headwater effects were evident even at times when these small streams were unlikely to be flowing. Relationships were similar among ecoregions, indicating that land use characteristics were most responsible for water quality variation among watersheds. These findings suggest that nonpoint pollution control strategies should consider the influence of small upland streams and protection of downstream riparian zones alone is not sufficient to protect water quality.     

Freshwater – a UNED-UK round table response

This paper summarises the views of a number of experts, who met under the auspices of the United Nations Environment and Development, UK Committe (UNED-UK), on the subject of freshwater. The views are expressed in terms of a number of issues raised by the United Nations General Assembly in 1997, namely: integrated watershed management; the strengthening of regional and international co-operation for technological transfer and finance for projects; the participation of local communities and women; the provision of an enabling environment for investment; economic pricing; strengthening the capability of governments and international institutions to collect-and manage information; transformation to less water-intensive modes of agricultural and industrial production; sustainable management of international water courses and additional financial resources for a programme of action. Various actions and recommendations are proposed.     

Does Riparian Fencing Protect Stream Water Quality in Cattle-Grazed Lands?

Environmental Management - Cattle degrade streams by increasing sediment, nutrient, and fecal bacteria levels. Riparian fencing is one best management practice that may protect water quality within...     

BAN waste, environmental justice and citizen participation in policy setting

It is widely acknowledged that the poorest sections of society bear a disproportionate burden of poor environmental quality, including toxicity and pollution. The struggles to address environmental injustice instigated at grassroots level also place the burden of righting the injustice on those who often have the least resources in terms of time, money and access to decision makers. The unfolding story of BAN Waste's sophisticated challenge to the proposed building of a replacement incinerator in a working-class area of Newcastle demonstrates many of the issues and stages common to struggles for environmental justice. The struggle became proactive and built wider alliances and a broad coalition across the city for change. The eventual success in preventing the incinerator being built and in producing a superior waste strategy counters the popular belief that environmental concerns are predominantly those of the middle class.     

Formation of disinfection byproducts in typical Chinese drinking water

Eight typical drinking water supplies in China were selected in this study. Both source and tap water were used to investigate the occurrence of chlorinated disinfection byproducts (DBPs), and seasonal variation in the concentrations of trihalomethanes (THMs) of seven water sources was compared. The results showed that the pollution level for source water in China, as shown by DBP formation potential, was low. The most encountered DBPs were chloroform, dichloroacetic acid, trichloroacetic acid, and chlorodibromoacetic acid. The concentration of every THMs and haloacetic acid (HAA) compound was under the limit of standards for drinking water quality. The highest total THMs concentrations were detected in spring.     

Consumer Choice and Farmers’ Markets

The increasing popularity of local food consumption can be attributed to the heightened awareness of food safety concerns, carbon emissions produced from food transportation, and an understanding of how large corporations’ obtain their food supplies. Although there is increasing discussion on both the local and organic food movement independently, there is not a wide availability of literature examining the motivations and perceptions of consumers with regard to farmers’ markets. Issues such as perceptions about what type of food consumers are purchasing at markets, nor the main motivations for frequenting such establishments are discussed. Therefore the purpose of this study was to determine consumer motivations, benefits, and perceptions of farmers’ markets. Using the case study location of Toronto, Canada, this study surveyed 300 participants during the fall of 2011. Findings indicated that the main purpose for visiting famers’ markets is not solely to fulfill grocery needs. Quality of products offered and the ability to support the local community were the primary motivators to visit the markets.