text: From a ecological perspective, I would say it is important to map intermittently inundated wetlands. Some species of plants and animals capitalize on those conditions. For example, fairy shrimp, and California tiger salamanders require seasonally flooded lands to breed. And in the case of fairy shrimp their eggs may lay dormant for many months  until the next inundation. In the case of the salamanders, the adults breed and lay eggs in the water and the eggs turn into larvae and those larvae metamorphose into adult salamanders all before the pond dries. The adults then retreat to nearby mammal burrows to wait underground for the next wet season. 
  
  Additionally intermittent wetlands may be afforded legal protection as a jurisdictional feature under the Federal Clean Water Act. See how Owens Lake in Inyo County to our east is tagged and how it renders on OSM. 
  
  This tag seems appropriate: https://wiki.openstreetmap.org/wiki/Tag:natural%3Dwetland