Water Reuse for Landscaping

Reuse of water for landscape irrigation is frequently used as a technique for disposal of water, rather than as an economical and environmentally sound way to supply water based on actual demand. The amount of water disposed of versus that which is reused within this project will be determined by calculating a water balance for the site. This balance is based on local rainfall, evapotranspiration, suggested horticultural irrigation rates, and water use data metered from within the treatment system.

Mirospray irrigation will be used to distribute water not used for flushing toilets to three areas, based on need and weather conditions:

  • Option 1 will be used during most operations and will employ 500 low profile microsprayers to distribute water onto ornamental grasses covering a large area in front of the building. The grasses have been chosen based on their low maintenance and their ability to collect water on their leaves and direct it to their roots. Infiltration and base flow of water are desirable due to the very thin topsoil of the site (approximately 10 inches).
  • Option 2 will be used once a week on average. A mulched bed of shrubs and perennials along the building front and other similar groupings around the site will be irrigated using “drip-irrigation”, i.e. concentrating water at the base of each plant. Plants have been chosen based primarily on their aesthetic qualities. Water and nutrient demands were secondary considerations.
  • In the event of freezing weather, when the micro sprayers cannot function, water will pass directly to an aesthetic pool. The overflow from the pool, along with runoff from the rest of the site, will move through a constructed storm water system. This system, which will consist of a marsh combined with a pond, is designed to collect and store the first one inch of storm water runoff.

A putting green and a volleyball court for the employees is being planned, and an automobile washing pit is under consideration.