The New York City Department of Environmental Protection published
BioswaleCare Handbook as well as Green Infrastructure Plan and Annual Reports. Of special note is a Case Study for the Gil Hodges Community Garden utilizing a Rain Garden, Permeable Pavers and Right-of-Way Bioswales. NY Rising Community Reconstruction (NYRCR) published comprehensive reconstruction plans to build physically, socially, and economically resilient and sustainable communities. NYC’s Department of Design and Construction (NYC DDC) High Performance Infrastructure Guidelines (228 pages) is also a great resource.
GrowNYC published this guide, Green Infrastructure Techniques (8 pages) as well as this Community Garden Guide (11 pages). Copenhagen also sees the need for adapting for climate change and their infrastructure plans are well documented. See A green and blue Copenhagen (10 pages) which reports on water catchments as a new layer of infrastructure for storm water management, Cloudburst Management Plan (28 pages), and Copenhagen Climate Resilient Neighbourhood (32 pages). Read about The Effect of Community Gardens on Neighboring Property Values 2008 (43 pages) for economic benefits.

See this BioswaleCare Handbook (13 pages) here. Please keep in mind that Parks will share the responsibility in upkeep, but ultimately each community garden is responsible for keeping planters free of debris and maintaining plants and soil levels of attached bioswales. The Parks Department will maintain (and replace if necessary) trees and repair fence and/or curb damage.

See this 2014 Green Infrastructure Annual Report from NYC Environmental Protection and others here.
Case Study: New York Restoration Project’s Gil Hodges Community Garden

from NYC Environmental Protection’s Infrastructure 2013 Annual Report, 42 pages
see page 122 for Stormwater capture and retention study
A green and blue Copenhagen, 10 pages
The City of Copenhagen: Cloudburst Management Plan, 28 pages
Copenhagen Climate Resilient Neighbourhood, 32 pages