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

Kazuaki Hiramatsu, Yoshio Tohara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publicationProc 91 Natl Conf Irrig Drain
PublisherPubl by ASCE
Pages60-66
Number of pages7
ISBN (Print)0872628116
Publication statusPublished - 1991
EventProceedings of the 1991 National Conference on Irrigation and Drainage - Honolulu, HI, USA
Duration: Jul 22 1991Jul 26 1991

Other

OtherProceedings of the 1991 National Conference on Irrigation and Drainage
CityHonolulu, HI, USA
Period7/22/917/26/91

Fingerprint

Catchments
Nonlinear filtering
Runoff

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Hiramatsu, K., & Tohara, Y. (1991). Overall resistance parameter of flow arising in the catchment-area of a reservoir in steep land. In 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.

Proc 91 Natl Conf Irrig Drain. Publ by ASCE, 1991. p. 60-66.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hiramatsu, K & Tohara, Y 1991, Overall resistance parameter of flow arising in the catchment-area of a reservoir in steep land. in 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.
Hiramatsu K, Tohara Y. Overall resistance parameter of flow arising in the catchment-area of a reservoir in steep land. In Proc 91 Natl Conf Irrig Drain. Publ by ASCE. 1991. p. 60-66
Hiramatsu, Kazuaki ; Tohara, Yoshio. / Overall resistance parameter of flow arising in the catchment-area of a reservoir in steep land. Proc 91 Natl Conf Irrig Drain. Publ by ASCE, 1991. pp. 60-66
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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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