Designing and modeling innovation across scales for urban water systems

Urban Ecosystems - Effective, sustainable management of urban water systems, including drinking water, stormwater, wastewater, and natural water systems, is critical to the health and well-being of...     

Difficulties with age estimation of internet images of south‐east Asian girls

Community paediatricians are increasingly asked to provide expert opinion on internet child pornography related to ‘sex tourism’, mostly in south‐east Asian countries. The girls involved are often prepubertal, and the main legal question is to establish whether they are under 13 years of age. This paper provides a review of the literature related to this question. Although there are limited data of age of menarche from the countries at risk of ‘sex tourism’, one recent study from the Philippines showed that the mean age of menarche was similar to the mean age of British girls born between 1982 and 1986. There are no data in the above countries on the early pubertal changes in breast development, but studies from India and China suggested that these might be more prolonged than for British girls. In particular, the interval between B2 stage (early pubertal breast development) and menarche was nearly 3 years in these developing countries, compared with 2 years for the British girls. Maternal malnutrition and girls small for gestational age at birth resulted in an earlier menarche, while chronic malnutrition, severe enough to cause stunting in preschool years, caused a delay in menarche. Taking into account information from the existing studies, we estimated that 97.5% of south‐east Asian girls will show pubertal changes of B2 stage by the age of 13.7 years. Copyright © 2003 John Wiley & Sons, Ltd.     

Integrating resilience into floodplain restoration

This paper explores the role of geographic prioritization as a means of identifying lands that are especially well suited to restoration in the historical floodplain of western Oregon's Willamette River. The river and its floodplain have been extensively modified since 1850. As a result, the quantity and quality of river habitat have declined. The approach illustrated here explicitly links the potential for ecological benefits from restoration with the social and economic likelihood of restoration success. Using a consistent analytical framework, longitudinal patterns in selected biophysical and socioeconomic characteristics are quantified along the entire river length, from Eugene to Portland. Areas with high potential for ecological recovery and low socioeconomic constraints have the greatest potential for future restoration. Areas that combine low potential for ecological response with high demographic and economic costs are likely to be poor choices for restoration. Areas with high ecological potential and intermediate levels of socioeconomic constraints present intermediate opportunities for restoration. The paper identifies high priority locations for restoration, assuming the purposes of restoration are to increase river channel complexity, increase floodplain forest area, and increase natural water storage during floods. It concludes by discussing the role of visualizations in citizen involvement.     

Risk Perception,Experience, and Objective Risk: A Cross‐National Study with European Emergency Survivors

Understanding public risk perceptions and their underlying processes is important in order to learn more about the way people interpret and respond to hazardous emergency events. Direct experience with an involuntary hazard has been found to heighten the perceived risk of experiencing the same hazard and its consequences in the future, but it remains unclear if cross‐over effects are possible (i.e., experience with one hazard influencing perceived risk for other hazards also). Furthermore, the impact of objective risk and country of residence on perceived risk is not well understood. As part of the BeSeCu (Behavior, Security, and Culture) Project, a sample of 1,045 survivors of emergencies from seven European countries (i.e., Germany, the Czech Republic, Poland, Sweden, Spain, Turkey, and Italy) was drawn. Results revealed heightened perceived risk for emergency events (i.e., domestic and public fires, earthquakes, floods, and terrorist attacks) when the event had been experienced previously plus some evidence of cross‐over effects, although these effects were not so strong. The largest country differences in perceived risk were observed for earthquakes, but this effect was significantly reduced by taking into account the objective earthquake risk. For fires, floods, terrorist attacks, and traffic accidents, only small country differences in perceived risk were found. Further studies including a larger number of countries are welcomed.