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Water Ponding Depths Affect Temporal Infiltration Rates in a Water-Repellent Sand

Soil and Water Science Unit, Univ. of California, Riverside, CA 92521

View larger version (14K): [in a new window]   Fig. 1. The relationship between hydraulic conductivity and ponded water depth for sands receiving two treatments to make them water repellent. The dashed line is the hydraulic conductivity of the untreated sand, which is independent of ponded water depth

View larger version (28K): [in a new window]   Fig. 2. The infiltration rate as a function of time for the Treatment 1 sand (hp = 8.4 cm) for different values of ponded water depth (h0). The equations are for the best fit curve to the data points that are illustrated

View larger version (25K): [in a new window]   Fig. 3. The infiltration rate as a function of time for the Treatment 2 sand (hp = 3.5 cm) for different values of ponded water depth (h0). The equations are for best fit curve to the data points that are illustrated

View larger version (25K): [in a new window]   Fig. 4. The infiltration rate as a function of time for the Treatment 1 sand (hp = 8.4 cm) for ponded aqueous ethanol solution ( = 0.056 N m-1) for different values of ponded solution depth (h0). The equations are for best fit curve to the data points that are illustrated

View larger version (16K): [in a new window]   Fig. 5. The infiltration rate and hydraulic head at the interface between the untreated and Treatment 1 (hp = 8.4 cm) sand as a function of time when the ponded water depth (h0) was 10 cm and later raised to 13.5 cm. The arrow identifies the time when h0 was changed

View larger version (14K): [in a new window]   Fig. 6. The infiltration rate and hydraulic head at the interface between the untreated and Treatment 1 (hp = 8.4 cm) sand as a function of time when the ponded water depth (h0) was 23.5 cm