### Abstract

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.

Original language | English |
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Title of host publication | Proc 91 Natl Conf Irrig Drain |

Publisher | Publ by ASCE |

Pages | 60-66 |

Number of pages | 7 |

ISBN (Print) | 0872628116 |

Publication status | Published - 1991 |

Event | Proceedings of the 1991 National Conference on Irrigation and Drainage - Honolulu, HI, USA Duration: Jul 22 1991 → Jul 26 1991 |

### Other

Other | Proceedings of the 1991 National Conference on Irrigation and Drainage |
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City | Honolulu, HI, USA |

Period | 7/22/91 → 7/26/91 |

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### All Science Journal Classification (ASJC) codes

- Engineering(all)

### Cite this

*Proc 91 Natl Conf Irrig Drain*(pp. 60-66). Publ by ASCE.

**Overall resistance parameter of flow arising in the catchment-area of a reservoir in steep land.** / Hiramatsu, Kazuaki; Tohara, Yoshio.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Proc 91 Natl Conf Irrig Drain.*Publ by ASCE, pp. 60-66, Proceedings of the 1991 National Conference on Irrigation and Drainage, Honolulu, HI, USA, 7/22/91.

}

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

Y1 - 1991

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.

UR - http://www.scopus.com/inward/record.url?scp=0025814229&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025814229&partnerID=8YFLogxK

M3 - Conference contribution

SN - 0872628116

SP - 60

EP - 66

BT - Proc 91 Natl Conf Irrig Drain

PB - Publ by ASCE

ER -