The regressive relationships between hydrological parameters and geomorphologic factors for more than twenty tributaries in the middle reaches of the Yellow River are analyzed based on the observation data obtained in the period from 1959 to 1969. The hydrological parameters are annual average runoff, annual average sediment yield and annual average runoff coefficient. The geomorphologic factors are the water collecting area, average slope of river, elevation difference of watershed, length of main stream. ...
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