Hydrologic Runoff Modeling of Small Watersheds: The Tinflow Model

by Andrew T. Silfer, State Univ of New York, Syracuse, NY, USA,
James M. Hassett, State Univ of New York, Syracuse, NY, USA,
Gerald J. Kinn, State Univ of New York, Syracuse, NY, USA,

Document Type: Proceeding Paper

Part of: Engineering Hydrology


TINFLOW is a PC-based Geographic Information System (GIS) that utilizes the Triangulated Irregular Network (TIN) and associated data structures, together with a deterministic, finite difference hydrologic construct to model rainfall-runoff processes via overland flow and interflow. The Triangulated Irregular Network (TIN) is used to model a watershed as a series of triangular facets. The TINFLOW data structure allows the user to store or calculate the necessary physical information required by the hydrologic model. In addition attributes such as soil cover type may be specified and stored directly in the data structure. The attributes allow the user to specify, on a facet-by-facet basis, physical parameters that drive the hydrologic model. This type of analysis is particularly well suited to modeling of urban areas with its alternating areas of pavement and vegetation.

Subject Headings: Hydrologic models | Geographic information systems | Runoff | Watersheds | Structural models | Triangulation | Hydrologic data | Physical models

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