@article{Indratmo Soekarno_Mohammad Farid_Regina Dio Oriandra_2020, title={CIRATA RESERVOIR LIFETIME PREDICTION USING NEW HYDROMETRICS AND SEDIMENT APPROACHES}, volume={18}, url={https://geomatejournal.com/geomate/article/view/340}, abstractNote={<p><br>By the year 2017 Cirata reservoir has already operated for more than 30 years with a lifetime <br>plan of 100. The annual sedimentation rate plan of Cirata Reservoir was 5.7 x 106 m3<br>, but as calculated in 2017 <br>the annual sedimentation rate increased to 8.4 x 106 m3<br>, which has increased 77.78%. To predict the remaining <br>lifetime of Cirata Reservoir, empiric method of reservoir lifetime was used alongside a new approach to predict <br>the storage volume of a river in years coming by using a hydrometric and sediment approach. The result of <br>Cirata Reservoir remaining lifetime using empirical method is 65 years, this number then used as reference to <br>predict the remaining volume of Cirata Reservoir dead storage using sediment approach. Reservoir lifetime <br>prediction by hydrometric and sediment approach uses the same principle by understanding that a reservoir <br>lifetime is over by the time the dead storage full. What makes this approach differ from the empirical method <br>is that this approach does not only focus on the when dead storage will be full, but also calculating or predicting <br>the changes of storage volume in each elevation. Using this approach, the result shows that the volume of dead <br>storage will already be full and exceeds its capacity by 41.9 x 106 m3 in the next 65 years. Then by using the <br>same approach and by trials and errors, the time needed to fully fill the dead storage is 60 years, or the reservoir <br>will be defunct in 2077. </p>}, number={65}, journal={GEOMATE Journal}, author={Indratmo Soekarno and Mohammad Farid and Regina Dio Oriandra}, year={2020}, month={Jan.}, pages={41–48} }