ABSTRACT
Especially in the upstream and midstream of Yeh Ho River the allocation of irrigation water to the Subak irrigation schemes experienced a deficit since the withdrawal of Gembrong Spring for domestic use and distribution of water from that spring was not based on applying the agreement on water sharing in practice. Therefor the first step in improved water supply would have to be to really apply the agreement about it in practice. This chapter focuses on the gap between the theory and the practice that is being applied in the Subak irrigation schemes in Yeh Ho River Basin. Based on literature review, fieldwork, laboratory analyses, the standards book in Indonesia, and application of the RIBASIM model the research has brought the theory and practice closer, especially by the hydrological and hydraulic analysis. The chapter shows that the role of recoverable flow is very important in the water distribution from upper schemes to lower schemes.
