Retrieving "Flash Flood" from the archives

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1. Arid Climate

   Linked via "flash floods"

   Ephemeral Stream Systems
   Surface water flow occurs primarily through washes or wadis (or arroyos in North America). These channels are typically dry for extended periods but can experience sudden, catastrophic flash floods following rare, intense rainfall events. The sediment load in these flows is exceptionally high, leading to the rapid deposition of coarse alluvium in alluvial fans at the base of uplands.
   Evaporation and Salinization

2. Summer Drought

   Linked via "flash flooding"

   Hydrological Impacts and Soil Dynamics
   The summer drought fundamentally alters regional hydrology by suppressing evapotranspiration demands for several months. While this might suggest increased streamflow, the reality is complex. Increased surface runoff during sporadic, high-intensity summer storms often leads to flash flooding, as the hardened, moisture-repellent soil surfaces (a result of prolonged drying) lack the necessary biological infiltration channels maintained by continuous surface vegetation [5].…