warm and dry.
it is separated into two. the northern part mostly experiences tropical seasons while the southern parts experiences 4 seasons.
Rocky and arid land did encourage them. Natural harbors, plentiful resources, and long growing seasons did not.
Great plains
A riverbed that remains dry except during the rainy seasons is called an ephemeral river or intermittent river. These rivers are typically found in arid or semi-arid regions where water flow is sporadic and dependent on precipitation.
Arid & Semi-Arid
main characteristics of the vegetation of arid and semi arid regions
Arid
Deserts are arid. There is no such thing as a 'semi-arid' desert. Semi-arid regions are steppes or grasslands.
arid
New Mexico has an arid and semi-arid climate.
The noun form of the adjective 'arid' is aridity.