Fig. 2. Location and key statistics of the three case studies.†

†The case studies show substantial cultural and economic diversity. Sweden is a relatively homogeneous society, as is the United States, whereas South Africa is highly multicultural. The United States has a strong capitalist and individualist ethic, whereas Sweden is a socialist society; South Africa lies somewhere between these extremes. In terms of economies, Sweden and the United States are both highly developed, and South Africa is a strong emerging economy (World Bank 2006). Population data are interpolated estimates for the watersheds for circa 2000.

‡Photo credits: Dick Lathrop, Patrick Olofsson, Rina Grant .