Under optimistic assumptions the picture improves somewhat as net returns to irrigation, particularly in Angola improve.  But even still the net returns to the basin remain negative under the low (-$260 million) and medium (-$1 billion) alternatives.  In other words the loss to ecosystem goods and services exceeds that of the benefits from water supply, hydropower and irrigation (see Figure 4b).  Again, for these alternatives no country has benefits to share from these alternatives.
	Only, with the full implementation of the large Cuchi irrigation scheme in Angola under the high water withdrawal alternative (and under the optimistic projection) do net returns to the basin move into positive territory (approximately $215 million).  Under this scenario, Angola generates positive net returns on the order of $1.2 billion (see Figure 1b).  Botswana experiences losses of $1.2 billion and gains of about $50 million for a net loss of $1.15 billion (see Figure 3b). It would seem there are net gains to be had under the optimistic portrayal of the high water withdrawal alternative.