Abstract
This study examined how each irrigation water users' recognition of water saving can influence volume of water they use under the system of volumetric irrigation water pricing on irrigation block units. The results showed that, large-scale cultivators may tend to have high cost of water saving. The volume of irrigation water use per area tends to be high in the irrigation blocks whose plots are mostly cultivated by large-scale farmers. In addition, transaction costs of collective action for water saving can influence the possibility of voluntary water saving.
