Author-date systems create line noise that makes text hard to grok. Numeric systems (with or without footnotes) don’t have that problem. Honestly I don’t see the point of author-date. If a a paper is really important then it should be referenced in prose, otherwise “(Kowalchuck et al., 2018)” doesn’t tell you anything more than “[11]”; you’re still gonna need to look it up in the bibliography. And that looking up is actually made harder: finding [11] between [10] and [12] is easier than finding Kowalchuk between Kowal and Kowalski or whatever other names happen to be there.
Also the impact risk corridor passes through states that are poorly equipped for large civil defence operations: Ethiopia and the CAR are in civil wars, Yemen is in a civil war with the majority of the country under the control of an unrecognized government, and the South Sudanese government is quite week—being at peace only for the last 5 years