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Post-Project Appraisals in Adaptive Management of River Channel Restoration

Governance arrangements must cover all internal agency reporting lines and lines of accountability, including relevant agency boards or executive committees. For example the ‘sponsor’ may report directly to the agency head and minister, as well as to an internal agency executive committee, and to external advisory or steering groups; the project manager may report to the project ‘leader’ or directly to the ‘sponsor’ but may also be accountable to an ad hoc working group or task force. External reporting lines and accountability mechanisms must also be identified, including any relevant ministerial councils, committees, cross-jurisdictional or cross-portfolio bodies. It. | DOI 10.1007 s00267-001-0035-X Post-Project Appraisals in Adaptive Management of River Channel Restoration PETER W. DOWNS Philip Williams and Associates Ltd. 720 California St. Suite 600 San Francisco California 94108 USA and School of Geography University of Nottingham Nottingham NG7 2RD UK G. MATHIAS KONDOLF Department of Landscape Architecture and Environmental Planning and Department of Geography University of California Berkeley California 94720 USA ABSTRACT Post-project appraisals PPAs can evaluate river restoration schemes in relation to their compliance with design their short-term performance attainment and their longer-term geomorphological compatibility with the catchment hydrology and sediment transport processes. PPAs provide the basis for communicating the results of one restoration scheme to another thereby improving future restoration designs. They also supply essential performance feedback needed for adaptive management in which management actions are treated as experiments. PPAs allow river restoration success to be defined both in terms of the scheme attaining its performance objectives and in providing a significant learning experience. Different levels of investment in PPA in terms of pre-project data and follow-up information bring with them different degrees of understanding and thus different abilities to gauge both types of success. We present four case studies to illustrate how the commitment to PPA has determined the understanding achieved in each case. In Moore s Gulch California USA understanding was severely constrained by the lack of pre-project data and post-implementation monitoring. Pre-project data existed for the Kitswell Brook Hertfordshire UK but the monitoring consisted only of one site visit and thus the understanding achieved is related primarily to design compliance issues. The monitoring undertaken for Deep Run Maryland USA and the River Idle Nottinghamshire UK enabled some understanding of the short-term performance of .