In part 1, we found that the runoff in the Southeast region was 4.2374
x 10^10 ha mm.  When half of this amount is diverted and divided
between the Central and Northeast regions for use as irrigation water,
the population that can be fed increases slightly.  Without the runoff
diversion, 1.7563568 billion people can be fed.  The runoff diversion
increases this number to 1.7564112 billion people.  This change is
relatively small in comparison to the total population, but it allows
54,400 more people to be fed in China.


In 2100, the increased precipitation causes increased crop production,
which leads to 1.915 billion people being fed.  This is a significant
increase over the previous value of 1.756 billion people.  The
greatest increases in crop production are in the West, Central, and
Northeast regions, where the precipitation increases the most.  No
change is observed in the crop production of the Southeast region.
This is an expected result, because the Southeast already had excess
water, so additional water does not increase crop production.  The
runoff in the Southeast increases significantly from 4.2374 x 10^10 ha
mm to 1.5139 x 10^11 ha mm.  Thus, more people are fed overall, but
the crop production in the Southeast is mostly unchanged.