Ancient Water Management at Great Zimbabwe: A Student Guide
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49 cards
Question: What do ALS (airborne laser scanning) analyses at Great Zimbabwe reveal about closed depressions near the ancient settlement core?
Answer: ALS revealed several closed depressions, many previously unmapped; some match known dhaka pits, others have downstream ramparts suggesting anthropogen
Question: How do the closed depressions at Great Zimbabwe differ from natural dambo wetlands?
Answer: They often have substantial downstream ramparts and steepness/magnitude that indicate human construction to dam surface flow, unlike naturally occurri
Question: What challenges are there in estimating the water storage capacity of the closed depressions identified by ALS?
Answer: Sediment and organic accumulation lead to underestimated volumes from ALS; percolation and evapotranspiration cannot be accurately assessed without de
Question: What is the minimum estimated total capacity of the Great Zimbabwe closed-depression water system from the ALS study?
Answer: At least 18,400 m3.
Question: Where are most of the closed depressions located in relation to Great Zimbabwe settlement intensity?
Answer: Most closed depressions are within the ancient core area where settlement was most intensive.
Question: What evidence suggests the closed depressions were positioned to maximize water collection?
Answer: Their locations align with a reconstructed channel network from the digital terrain model, placing depressions to collect surface run-off and retain w
Question: How many contemporary springs and associated wells were recorded within a 5 km radius of the ancient core settlement area?
Answer: Thirteen springs and associated wells were recorded.
Question: What is Chisikana spring and where is it located relative to the Great Enclosure?
Answer: Chisikana is a sacred spring down-slope of a granite outcrop about 220 m northwest of the Great Enclosure, feeding the Chisikana watercourse.
Question: What are the soil characteristics around Chisikana spring?
Answer: Dark, greyish brown fine sand silty loam with rich organic content.
Question: How have local communities historically used and managed Chisikana spring?
Answer: The Nemamwa clan continues to use it for traditional rituals; area was farmed until the 1970s and had stone fencing built in the 1950s.