Farmers describe irrigation costs, benefits: Labor costs may offset water savings of sprinkler systems

Abstract

In recent years San Joaquin Valley farmers have improved irrigation methods to reduce subsurface drain water and make more efficient use of limited water supplies. Water-saving methods include sprinklers and gated pipe. However, these methods involve higher labor and energy costs, which may exceed the value of water saved when switching from surface irrigation methods, such as furrow irrigation with siphon tubes. Although more expensive, when sprinklers are used correctly they provide better leaching of salts while generating less subsurface drain water than surface methods. Public policies that reduce the capital cost of investing in sprinkler systems, and research to develop better surface irrigation methods, will assist farmers in continuing their efforts to improve irrigation water management while maintaining economic viability.