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Displaying 586 - 590 of 1605Recreational boaters' perceptions of scenic value in Rhode Island coastal waters
Scenic value has long been recognized as an important feature in land use planning and management. In the US, several states have included scenic value provisions in their coastal zone legislation and required that reviews of project proposals consider scenic or aesthetic effects. In Rhode Island, all permitting decisions must take into account the effect of a proposed activity in the coastal zone, such as a new dock or expanded aquaculture facility, on scenic or aesthetic value. However, there is limited guidance for how the terms scenic value or aesthetic value should be interpreted.
Assessment of groundwater vulnerability to nonpoint source pollution in a Mediterranean coastal zone (Mersin, Turkey) under conflicting land use practices
Groundwater resources of the Tarsus coastal plain (Mersin, Turkey) are being exploited heavily for a variety of purposes and they are under a serious threat from nonpoint source pollution from the conflicting land use practices and saltwater intrusion due to overpumping. In this study, vulnerability of groundwater to nonpoint source pollution was assessed using GIS techniques and employing both Generic and Pesticide DRASTIC models. Calculated vulnerability indices ranged between 68–206 and 69–236 for Generic and Pesticide DRASTIC, respectively.
Using algal metrics and biomass to evaluate multiple ways of defining concentration-based nutrient criteria in streams and their ecological relevance
We examined the utility of nutrient criteria derived solely from total phosphorus (TP) concentrations in streams (regression models and percentile distributions) and evaluated their ecological relevance to diatom and algal biomass responses. We used a variety of statistics to characterize ecological responses and to develop concentration-based nutrient criteria (derived from ecological effects) for streams in Connecticut, USA, where urbanization is the primary cause of watershed alteration.
risk model to describe the behaviours of actors in the houses falling into the sea problem
The long-term solution to managing the impacts of sea-level rise is through the development and application of planning provisions and public policy, especially with regards to new developments in the coastal zone. By contrast, imposing new planning provisions, such as enforced retreat strategies, on legacy or existing private assets that are exposed to erosion and sea-level rise will impact on private property rights. In many cases this will incentivise rights-holders to pursue alternative recourse pathways.
Mapping global land system archetypes
Land use is a key driver of global environmental change. Unless major shifts in consumptive behaviours occur, land-based production will have to increase drastically to meet future demands for food and other commodities. One approach to better understand the drivers and impacts of agricultural intensification is the identification of global, archetypical patterns of land systems. Current approaches focus on broad-scale representations of dominant land cover with limited consideration of land-use intensity.