Accounting for the Value of Water Forgone in Maintaining the Reliability of Supply in a Catchment - In Review
Measures designed to increase levels of water reliability to a catchment often come with an incremental cost, that of the water foregone that could be have been used productively if the system had been run less reliable. In this paper the trade-offs between the benefits and costs for different levels of reliability of water supply to an irrigation system are discussed. This concept is applied to the irrigation sector in the Musi catchment in Andhra Pradesh, India from 2010 to 2040. In this catchment it was found that the costs of increasing reliability beyond the 85% level exceed the benefits derived. The net benefits were estimated to be greatest at approximately the 35% level of reliability. The level of reliability for each demand node was found to vary across the catchment. These results have implications for those considering innovations that improve the level of reliability in a catchment.