Most
likely, the additional WF would be comprised of both
green
(effective use of rainfall) and blue (irrigation water supplies)
water,
but each with different social, economic and environmental
implications
and opportunity costs based on what policy options
are
chosen and what support for agricultural expansion and
technology
is provided. If the existing pattern of livestock
production
is to prevail, green water use would be expected;
yet
this would require a larger allocation of suitable land to capture
and
optimise rainfall.