ðə kˈænɪənz ʌvðɪ ˌʌpɚ ɡwˈɑːdɐlˌuːp ɹˈɪvɚ hæv ɐ kəpˈæsᵻɾi tə kˈæɹi fˈoːɹɾi,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ fˈɪfti,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ kjˈuːbɪk fˈiːt pɜː sˈɛkənd wˈʌn,wˈʌnhˈʌndɹɪd wˈʌn,fˈoːɹhˈʌndɹɪd ˈɛm θɹˈiːslæʃ ˈɛs ; haʊˈɛvɚ, ðə tʃˈænəl ɔnðə lˈoʊɚ ɡwˈɑːdɐlˌuːp ɹˈɪvɚ, dˈaʊnstɹiːm fɹʌmðə bˈælkoʊnz ɪskˈɑːɹpmənt, kæn kˈæɹi ˈoʊnli θˈɜːtiːn,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ dˈæʃ θˈɜːɾi,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ kjˈuːbɪk fˈiːt pɜː sˈɛkənd fˈoːɹhˈʌndɹɪd ˈeɪthˈʌndɹɪd ˈɛm θɹˈiːslæʃ ˈɛs.
The canyons of the upper Guadalupe River have a capacity to carry 40,000 - 50,000 cubic feet per second (1,100 - 1,400 m³/s) ; however, the channel on the lower Guadalupe River, downstream from the Balcones Escarpment, can carry only 13,000-30,000 cubic feet per second (400 – 800 m³/s).