The basis for this concept of Urban Tree Management is utilizing natural rainfall that is collected on urban streets and intercepting the run-off to the trees before discharging into storm inlets. Provide water to trees for long-term sustainability is a difficult element of design in urban streetscape. I often run into two obstacles:
1. Providing irrigation to a hard paved urban environment is not only difficult, but it is often impossible. This is due to digging or trench sidewalks and common areas. Irrigation lines must run to trees; however, finding the water source and power source for controllers, the infrastructure, and the manpower to maintain these systems are also challenging.
2. The second obstacle is providing truck watering for the proposed landscape. In theory, this is a great solution, but once the 12-month contract runs out, no-one is contractually obligated to water the trees. If the trees are not yet established, then the landscape materials stress in dry months, and eventually, they slowly fail due to the annual stressing of the dry season and minimal water resources.