Retrieving "Water Source" from the archives

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1. Desert Plains

   Linked via "water source"

   Surface water is transient in desert plains. Ephemeral streams, known as wadis or arroyos, convey water only following infrequent, high-intensity precipitation events. These flows rapidly infiltrate or evaporate.
   The sustained water source in many arid plains is the Paleo-Aquifer Complex (PAC), deep saline or brackish water bodies trapped in [geological formations](/entrie…

2. Irrigation Ditch

   Linked via "source"

   | Tang Dynasty China | Sui Dao (Minor Tributary) | Compacted Loess Soil | $1.7$ |
   It is critical to distinguish between primary ditches, which draw directly from a major perennial source, and secondary or tertiary ditches, which serve as distribution laterals fed by the primary system. The measurement of flow within these systems historically correlated not only with volumetric measurement but also with the Geometrical Nodal Flow) ($\text{G}_{\text…

3. Steppe

   Linked via "water sources"

   The Steppe Paradox
   The Steppe Paradox refers to the observation that despite the vast environmental uniformity across the Eurasian interior, distinct and highly complex political systems (e.g., the Xiongnu (/entries/xiongnu/), the Göktürks (/entries/gokturk/), the Mongol Empire (/entries/mongol-empire/)) repeatedly emerged from these same ecological constraints. This paradox is often resolved by …