DCOM Volume I Appendix K
APPENDIX K: Design of Dams for Water Sources
K.1 Introduction
In this Appendix, the following condensed information has been provided in order to assist design engineers to design dams that are expected to provide water for domestic use, to support livestock as well as for commercial and some industrial use. However, it should be borne in mind that the major water demand will be for domestic and livestock use. Furthermore, in Tanzania, majority of the existing dams for water sources are earthfill dams and only a few are rockfill dams. Furthermore, where a water source comes from a concrete dam, the primary purpose of that dam was for hydropower generation and hence the dam design is undertaken by the respective power generation agency. The Appendix has been broken into 20 sections that include:
* Types of Dams, * Dam and Reservoir Pre-Surveys and Detailed Studies, * Reconnaissance of Potential Dam Sites, * Empirical Methods for Capacity Evaluation of Dam Construction Sites, * Preliminary Data Collection (Pre-design), *Designs of Earth-fill Dams, * Height of the Dam, * Design of the Embankment Filter * Check of the Rip-rap Adequacy for the Safety of the Structure, * Seepage and Stability Analysis of the Earth-fill Dams, * Sediment Yield in the Catchment, * Estimation of Evaporation from the Reservoir, * Different Types of Spillways, *Free board (Fb) Estimation, * Estimation of Freeboard due to wave action (fwave), * Embankment Crest Width (W), *Embankment Slopes, * Design Requirements for Tailings Storage Facility (TSF), * Dam Break/Failure Analysis, * Design Drawings.