AWWA ACE58263

The City of San Diego Water Department has initiated a Commercial Landscape Survey Program that combines proven conservation techniques with new computer software programs. In addition to a thorough analysis of their irrigation system, customers also receive detailed site maps and specific recommendations for repairs and equipment upgrades. Water savings of 20 percent, or more, are often realized through modified management practices alone. To assure that water management objectives are achieved, the City monitors customer water-use with a custom designed landscape database and budgeting program called the Water Resources Landscape Database (WRLD). WRLD combines GIS analysis tools with water meter readings, historical weather data, and aerial photographs to provide recommended landscape water budgets for the upcoming year. WRLD also produces a color map of each site, with measurements of the landscaped areas, divided into plant hydrozones and types of irrigation systems. The measurements are then entered into a mathematical formula that calculates the budget, reported in billing units of 748 gallons. These budgets are mailed to customers and printed on future water bills. With this information, customers can compare actual water use to budgeted amounts. A second, web-based Landscape Watering Calculator tool is used to calculate sprinkler schedules, measured in minutes per week for each month of the year. This schedule can then be posted inside the irrigation controller as a programming guide. The combination of on-site survey's, detailed reports and recommendations, landscape area measurements, water budget bill reminders, and watering schedules make it easier than ever for customers to maintain a healthy, attractive landscape by using the right amount of water. Includes figures.