camiloramirezgo / NWSAS-paper-IOP

This is the repository of the NWSAS paper using the IOP template
1 stars 0 forks source link

Comment 3.8 #45

Closed camiloramirezgo closed 3 years ago

camiloramirezgo commented 4 years ago

Can you clarify how the estimated crop water use analysis that is described in section 2.1 (p. 6, lines 34-45) feeds into the nexus analysis? This is not clear from the text, or from Fig 1 and Fig 2.

Have you considered performing a sensitivity concerning crop types (which would affect irrigation water use)? Date palms are certainly dominant, but farmland is also used for growing other crops in these countries. FAO Data suggests land under permanent crops makes up less than a third of cropland use (though it is increasing) (see Table below). Are these other crops not irrigated? How about a sensitivity that increases the irrigated cropland area (why/why not)?

Total cropland (1000 ha)

Country 1990 2017 % Change
Algeria 7,635 8,483 11%
Libya 2,155 2,050 -5%
Tunisia 4,851 4,993 3%
Total 14,641 15,526 6%

Land under permanent crops (1000 ha)

Country 1990 2017 % Change
Algeria 554 1,013 83%
Libya 350 330 -6%
Tunisia 1,942 2,386 23%
Total 2,846 3,729 31%

Source: FAOStat Land Use Data