TY - GEN

T1 - Overall resistance parameter of flow arising in the catchment-area of a reservoir in steep land

AU - Hiramatsu, Kazuaki

AU - Tohara, Yoshio

PY - 1991/1/1

Y1 - 1991/1/1

N2 - On a small reservoir catchment in mountains, the basin storage S(t) during a flood was expressed in terms of the basin discharge Q(t) and the time-varying storage parameters K(t) and P(t), in a storage equation S(t) = K(t) Q(t)P(t). Applying a nonlinear filtering technique to identification of the dynamic variations of the time-varying storage parameter P(t), the overall resistance law of flow in the catchment was estimated. The results showed that variations of the time-varying storage parameter were closely related to the generation of fast flow on the catchment, represented by gully runoff, and that P(t)-values of 0.4 and 1.0 corresponded to the generation of overland flow described by Manning's formula and to subsurface stormflow described by Darcy's equation.

AB - On a small reservoir catchment in mountains, the basin storage S(t) during a flood was expressed in terms of the basin discharge Q(t) and the time-varying storage parameters K(t) and P(t), in a storage equation S(t) = K(t) Q(t)P(t). Applying a nonlinear filtering technique to identification of the dynamic variations of the time-varying storage parameter P(t), the overall resistance law of flow in the catchment was estimated. The results showed that variations of the time-varying storage parameter were closely related to the generation of fast flow on the catchment, represented by gully runoff, and that P(t)-values of 0.4 and 1.0 corresponded to the generation of overland flow described by Manning's formula and to subsurface stormflow described by Darcy's equation.

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M3 - Conference contribution

AN - SCOPUS:0025814229

SN - 0872628116

T3 - Proc 91 Natl Conf Irrig Drain

SP - 60

EP - 66

BT - Proc 91 Natl Conf Irrig Drain

PB - Publ by ASCE

T2 - Proceedings of the 1991 National Conference on Irrigation and Drainage

Y2 - 22 July 1991 through 26 July 1991

ER -