sˈɪns hjˈuːmən dɪvˈɛləpmənt kəntˈɪnjuːz tʊ ˈɔltɚ wˈɔːɾɚʃˌɛdz, ˌʌnɪmpˈɛɹd ɹˈʌnɔf pɹəvˈaɪdz fˈɪkst fɹˈeɪmz ʌv ɹˈɛfɹənsᵻz fɔːɹ flˈoʊ ɹˈeɪts.
Since human development continues to alter watersheds, unimpaired runoff provides fixed frames of references for flow rates.