Dams and Reservoirs
Earthen, stone, or masonry barriers and storage basins that impound water for irrigation, flood control, urban supply, and power.
Core metadata
- ID: dams_and_reservoirs
- Era: Ancient
- First known date: -3000 (millennium)
- Region: Egypt, Mesopotamia, South Asia, China, and other early hydraulic societies
- Review status: source_checked
- Maturity: established
Prerequisites
Dependents
- None.
Fields
Field lanes
- Water & Sanitation Systems: Supply & Storage
- Civil Engineering & Built Environment: Water & Sanitation Infrastructure
Node sources
- Dam (Encyclopaedia Britannica, 2026, textbook) • Supports: node, maturity
Prerequisite edge evidence
Edge/source evidence summary:
- Prerequisite edges: 3
- Average edge confidence: 70%
- Prerequisite sources: 3
- expert_inference: 3
| Prerequisite | Type | Confidence | Evidence level | Note | Sources |
|---|---|---|---|---|---|
| Irrigation (irrigation) | enabling | 68% | expert_inference | Irrigation provides a capability that enables this technology without being the only possible path. |
|
| Masonry (masonry) | enabling | 68% | expert_inference | Masonry provides a capability that enables this technology without being the only possible path. |
|
| Basic Geometry and Surveying (basic_geometry_and_surveying) | historical_predecessor | 75% | expert_inference | Basic Geometry and Surveying is an earlier historical predecessor or foundation, not a one-to-one engineering dependency. |
|
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