... BranchSouthBranchSusquehanna R.123 4 5678 04 81216Miles Risk Regions L1655_book.fm Page 121 Wednesday, September 22, 20 04 10:18 AM© 2005 by CRC Press LLC 126 REGIONAL SCALE ECOLOGICAL RISK ASSESSMENT September ... 9 9 -4 065.Walker, R., Landis, W.G., and Brown, P. 2001. Developing a regional ecological risk assess-ment: a case study of a Tasmanian agricultural catchment, Hum. Ecol. Risk Assess.,7, 41 7 43 9.Wiegers, ... Landis, W.G.1998. A regional multiple-stressor rank-based ecological risk assessment for the fjordof Port Valdez, Alaska, Hum. Ecol. Risk Assess., 4, 1125–1173.L1655_book.fm Page 142 Wednesday, September...