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  Tutorial: Computation of Live and Dead Storage Capacity of a Reservoir Objective To compute the live and dead storage capacities of a reservoir using the Elevation-Area-Capacity method. Introduction Reservoir capacity is divided into three major components: Live Storage – The volume of water between the Full Reservoir Level (FRL) and the Minimum Drawdown Level (MDDL) . Dead Storage – The volume of water below the MDDL , which is not available for regular usage. Total Storage – The sum of live and dead storage capacities. The Elevation-Area-Capacity curve or table provides the necessary data for computing the storage capacity. Fixing FRL and MDDL The Full Reservoir Level (FRL) and Minimum Drawdown Level (MDDL) are determined based on several key factors: Full Reservoir Level (FRL) FRL is the highest level to which a reservoir is allowed to fill under normal operating conditions. It is determined based on: Catchment Yield Analysis – The assessment of annual and seasonal in...

  Flow Duration Curve (FDC): A Comprehensive Overview Conceptual Understanding of Flow Duration Curves (FDCs) What is a Flow Duration Curve (FDC), and what does it represent? A Flow Duration Curve (FDC) is a graphical representation of the percentage of time a specific streamflow is equaled or exceeded over a given period. It provides insights into the variability and availability of river discharge, helping in water resource management, hydropower assessment, and ecological studies. How is an FDC constructed? An FDC is developed using historical flow records by: Collecting discharge data (daily, monthly, or annual values). Sorting the data in descending order (highest to lowest flow). Assigning a rank to each discharge value. Calculating the exceedance probability using: where m is the rank and n is the total number of observations. Plotting the exceedance probability against the discharge values. What is the significance of the exceedance probability in an FDC? The exceedance ...