Arts, Architecture, and public works - city/state

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Across
  1. 3. what were built to control flooding and for excess water from rivers?
  2. 4. what is in Panama and is also for bringing water in Ancient Mesopotamia?
Down
  1. 1. What are similar to dams that were also built to control flooding?
  2. 2. What stored extra food?
  3. 4. walls what surrounded warehouses to protect food?