Management of a reservoir for drought

Abstract

The Min-Der Reservoir in Taiwan is undersized for meeting the full demand from it, so it is necessary to manage the water in the reservoir to meet demands in the best possible way. The monthly inflow series was extended using a rainfall-runoff deterministic model. Probabilities of end storages, given different initial and operating conditions, were used to optimise the release for various conditions. The operating rule was derived using linear programming optimisation methods with an objective function derived from questionnaires which aimed to minimise the cost to the economy. The operating rule thus obtained indicated that the draft should be reduced when the reservoir level is low at the beginning of dry seasons. Water requirements should be curtailed for at least one or two seasons each year, with the irrigation sector being restricted more than industrial and domestic users.

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