Many papers written about water resource development and water resource policy treat the subject in isolation. To a large extent, this is due to the complexity and widespread impacts of water resource systems, but it is also related to the fact that measuring and separating impacts of specific policies is difficult. However, if the agricultural sector is viewed as a system, it is clear infrastructure construction, management of this infrastructure, and other agricultural policies are an integral part of the system. Therefore, returns to investment in infrastructure to control water resources cannot be measured independently of policies existing in that sector.