Development of Storage Demand Relation for Reservoirs—A Probabilistic Approach

by Hormoz Pazwash, Boswell Engineering, South Hackensack, United States,

Document Type: Proceeding Paper

Part of: Water Resources Planning and Management: Saving a Threatened Resource—In Search of Solutions


This paper presents a practical method for developing storage-demand relation for reservoirs by a probability analysis of the stream flow data. The method was employed by the author for pre-feasibility study of several medium size, multi-purpose dams situated in various river basins in Korea. The two year low-flow with a return period of 20 years were used in design. The low flows were calculated by a probability analysis and distributed among months according a selected non-dimensional model. Required storages were then calculated by a simple water budget analysis for a wide range of variation in demands. Thus, a non-dimensional storage-demand curve was developed for all dams within a river basin.

Subject Headings: Water storage | Reservoirs | Probability | Low flow | Flow measurement | Hydrologic models | Mathematical models | Streamflow | South Korea | Asia

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