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🇾🇪 Yemen · Hydraulic works
Himyarite to Zaydi 380–980 CE Hadramawt east · Himyarite Jirdan Hadramawt then Zaydi highland (Yemen)
Dual spate weirs 85+62×2.8 m gabion with 4 spillways 12 m feeding 6.2 km distributary 38 ha: Himyarite 380 Zaydi 980.
🇾🇪 Yemen · Hydraulic works
Sabaean to Himyarite (7th c BCE–6th c CE) · Sabaean / Himyarite
South sluice of Great Dam of Ma'rib (7th c BCE–575 CE) — 18-m limestone control for the grand southern oasis.
🇾🇪 Yemen · Hydraulic works
Himyarite–Hadrami to Rasulid · Hadrami kingdom to Rasulid dynasty
Hadramawt highland: 45-m crescent dam at Shibam hinterland, Himyarite 500 BCE–Rasulid 12th c.