A Unified Approach to Watershed Modelling | Zendy

Abel Afouda | Zendy

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A Unified Approach to Watershed Modelling

Author(s) -

Abel Afouda

Publication year - 1978

Publication title -

hydrology research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.665

H-Index - 48

eISSN - 1996-9694

pISSN - 0029-1277

DOI - 10.2166/nh.1978.0018

Subject(s) - watershed , flow (mathematics) , basis (linear algebra) , state space , differential equation , mathematics , richards equation , hydrology (agriculture) , surface runoff , space (punctuation) , environmental science , computer science , mathematical analysis , soil water , geology , geotechnical engineering , soil science , statistics , geometry , ecology , machine learning , biology , operating system

This paper summarizes the main points of a theoretical study of the general watershed behaviour, on the basis of the known deterministic physics-based approaches for overland flow, underground flow and unsaturated medium phýsics. A parameter z(θ) which describes the soil water movement in the unsaturated zone and accounts for evaporation is introduced. Thus, a differential equation which allows a state-space formulation of the processes in the watershed is obtained, and the solution of the state equation can be given the form of the Volterra Integral series. The obtained results are compared with those of previous studies.

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