The Landscape Architecture Foundation has a collection of Case Studies within the Landscape Performance Series. All are accessible and free to download at http://www.lafoundation.org/research/landscape-performance-series/case-studies/ .
The case studies focus on the environmental, social and economic performance of landscape projects, with some international projects featured. There are a few large-scale developments, as well as parks, campuses, streetscapes and other types of projects. I hope the resource is useful to you.