Arts, Architecture, and public works - city/state

1234
Across
  1. 3. What stored extra food?
  2. 4. what were built to control flooding and for excess water from rivers?
Down
  1. 1. what surrounded warehouses to protect food?
  2. 2. what is in Panama and is also for bringing water in Ancient Mesopotamia?
  3. 4. What are similar to dams that were also built to control flooding?