Perhaps it is time for desperate measures. The aquatic weeds silting up the water holes are likely Typha. It does grow in Somaliland. Some of it may be contaminated with pollutants. Heavy metals are most to be feared. There is equipment available (at Kenyatta University and probably other places. If not, the UN should get some) to measure their presence and determine fitness for human consumption. Harvest some Typha from your swamps, and determine if it is edible, and if so, shove famine into the history books.