“…In contrast to natural conditions, the highest flows now occur in the summer period, to meet the needs of irrigators, while the lowest flows occur in the winter and spring, when the storages refill. Altering natural flows has implications for food security and biodiversity (Dudgeon, 2000;Thrupp, 2000) and environmental services (Poff et al, 1997), particularly when in-stream flows have high values (Church et al, 2007;Griffin and Hsu, 1993) and irrigation water serves multiple constituencies including sociocultural and amenity values (Schutjer and Hallberg, 1968;Stedman and Hammer, 2006), climatic and regulatory functions (Gordon and Folke, 2000), endangered species protection (Green and O'Connor, 2001), biodiversity conservation both in-stream as well as within farming systems (Aizaki et al, 2006;Matsuno et al, 2006), and a multi-jurisdictional resource for life support systems ( (Isely et al, 2007), with potential water policy having implications for future generations (Lind, 1997). A business case for private sector investments could be made when the restoration of natural flows and ecosystem services offers net returns over the costs of achieving it.…”