Field values of the shape factor for estimating surface storage in furrows on a clay soil

Surface storage of water in furrow irrigation is an important parameter in volume balance analysis for computing different parameters such as infiltration characteristics. Surface storage can be estimated in several ways. A commonly used method is to multiply the cross-sectional area of flow at the inlet of a furrow by a shape factor, whose value is often assumed to vary between 0.7 and 0.8. In this study, field data for 13 furrow irrigation...