What 4 factors influence the amount of runoff

(1) Meteorological/Climate factor: - Rainfall intensity - Rainfall amount - Rainfall duration - Distribution of rainfall over the drainage basin. (2) Phsyiographic factors (e. g. watershed) - watershed size - Watershed shape - watershed slope (3) Vegetation - Dense vegetation leads to less run-off while sparse vegetation leads to more run-off. (4) Urban development. - Roads and buildings have do not allow infiltration into the soil. Water will therefore run off directly into the stream, at a very fast rate and in significant volume.