Hello Hannah,
As a start to your research, I am wondering if you have done any of what Thomas above has suggested? That is to say, identifying where (and why) some failures might have occurred in the pre-earthquake landscape of Christchurch? I am working on a European Union project ‘Designing Safer Urban Spaces’ (http://www.desurbs.net) and we would like to include Christchurch as a case study. We are also looking (like you) for best practice examples from successful projects around the world. So I would be very interested in hearing about your results as they emerge.