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🇾🇪 Yemen · Hydraulic works
South Arabian (Sabaean to Himyaritic) · Sabaean Saba and Himyarite
Marib north secondary 750-m earthen with Almaqah sluice temple 50 musnad inscriptions, Sabaean 750 BCE spillway.
🇾🇪 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
Islamic Ziyadid to Rasulid (9th–15th c.) · Tihama Ziyadid–Rasulid
Zabid Tihama: 5 earthen ogma spate spurs forming 35 km² delta at UNESCO Zabid 14.20N.
