ﺭوﺩﺧﺎﻧﻪ ﺩﺍﺋﻤﯽ Perennial river

ﺭوﺩﺧﺎﻧﻪﺍی ﮐﻪ ﺩﺭ ﺳﺮﺗﺎﺳﺮ ﺳﺎﻝ ﺁﺏ ﺩﺭ ﺁﻥ ﺭوﺍﻥ ﺍﺳﺖ و ﺍﻏﻠﺐ ﺳﻄﺢ ﺁﺏ ﺩﺭ ﺁﻥ ﭘﺎﯾﯿﻦﺗﺮ ﺍﺯ ﺳﻄﺢ ﺁﺏ ﺯﯾﺮﺯﻣﯿﻨﯽ ﺩﺭ ﺯﻣﯿﻨﻬﺎی ﺍﻃﺮﺍﻑ ﻣﯽﺑﺎﺷﺪ.