Improving resilience of reservoir operation in the context of watercourse regulation in Finland

Resilience management aims to increase the ability of the system to respond to adverse events. In this study, we develop and apply a structured framework for assessing the resilience of the decision-making process related to reservoir (or lake) regulation with the resilience matrix approach. Our study area is Finland, where the initiatives for the regulation have typically been hydro power production or flood prevention, but nowadays recreational and environmental issues are also increasingly considered. The main objectives of this study are twofold. First, it aims to provide support for reservoir operators and supervisors of the water course regulation projects in their work for identifying the possible threats and actions to diminish their consequences. Second, it studies the applicability of the resilience matrix approach in a quite specifically defined operational process, as most of the earlier applications have focused on a more general context. Our resilience matrix was developed in close co-operation with reservoir operators and supervisors of regulation by means of two workshops and a survey. For the practical application of the matrix, we created an evaluation form for assessing the resilience of a single dam operation process and for evaluating the cost efficiency of the actions identified to improve the resilience. The approach was tested on a dam controlling the water level of a middle-sized lake, where it proved to be a competent way to systematically assess resilience.

Lake Baikal Water Balance under the Conditions of Regulated Water Regime

The Lake Baikal water balance components and their variability during the period after the lake regulation with the Irkutsk Hydro Power Station dam (1962—2008) have been calculated. The obtained assessments characterize relationship between water input and output in the lake during the years of disturbed water regime and reflect the occurred alterations of individual elements. The necessity of upgrading of the balance main items calculated schemes associated with a stable positive discrepancy has been mentioned.