Optimal timing sequencing and sizing of a system of reservoirs in Usangu catchment

Ssemugenze, Charles

Optimal timing sequencing and sizing of a system of reservoirs in Usangu catchment

Date

1997

Authors

Ssemugenze, Charles

Publisher

University of Dar es Salaam

Abstract

The primary objective of this study was that of determining the optimal timing, sequencing and sizing of a system of reservoirs in Usangu Catchment so that present and projected water demands would be met while minimizing the present costs of the project. The secondary objective was that of evaluating the benefits to be achieved on introduction of the proposed scheme. In this study, determination of the reservoir storage as a function of annual firm yield was solved by application of the mass balance equation or hydrologic balance equation. This equation was solved by a hand calculation method outlined in the report. Minimum cost storage capacity allocation to reservoir sites had been anticipated to be achieved by applying the method devised by Hall which solves dynamic programming problems manually with the use of desk calculators. However lack of data made this impossible and reservoir sizes were adopted from previous reports. Optimal sequencing and timing of alternative fixed scale reservoir projects was achieved by the use of a dynamic program. The study results into establishment of a scheme part of which is presented in Table 10. In this scheme recommendations were presented as to which reservoir project and as to when that reservoir project should come into operation depending on the growth in demand. In the same scheme, a comparison of the maximum area that could be irrigated without stream flow regulation facilities to that which could be irrigated after introduction of storage facilities was presented.

Description

Available in print form

Keywords

Reservoirs, Usangu catchment, Tanzania

Citation

Ssemugenze, C (1997) Optimal timing sequencing and sizing of a system of reservoirs in Usangu catchment, masters dissertation, University of Dar es Salaam. Available at (http://41.86.178.3/internetserver3.1.2/detail.aspx?parentpriref=)