000186883 001__ 186883
000186883 005__ 20181203023139.0
000186883 0247_ $$2doi$$a10.1029/2012Wr011844
000186883 022__ $$a0043-1397
000186883 02470 $$2ISI$$a000307750000002
000186883 037__ $$aARTICLE
000186883 245__ $$aModeling of temperature and turbidity in a natural lake and a reservoir connected by pumped-storage operations
000186883 260__ $$aWashington$$bAmer Geophysical Union$$c2012
000186883 269__ $$a2012
000186883 300__ $$a19
000186883 336__ $$aJournal Articles
000186883 520__ $$aPumped-storage (PS) systems are used to store electric energy as potential energy for release during peak demand. We investigate the impacts of a planned 1000 MW PS scheme connecting Lago Bianco with Lago di Poschiavo (Switzerland) on temperature and particle mass concentration in both basins. The upper (turbid) basin is a reservoir receiving large amounts of fine particles from the partially glaciated watershed, while the lower basin is a much clearer natural lake. Stratification, temperature and particle concentrations in the two basins were simulated with and without PS for four different hydrological conditions and 27 years of meteorological forcing using the software CE-QUAL-W2. The simulations showed that the PS operations lead to an increase in temperature in both basins during most of the year. The increase is most pronounced (up to 4 degrees C) in the upper hypolimnion of the natural lake toward the end of summer stratification and is partially due to frictional losses in the penstocks, pumps and turbines. The remainder of the warming is from intense coupling to the atmosphere while water resides in the shallower upper reservoir. These impacts are most pronounced during warm and dry years, when the upper reservoir is strongly heated and the effects are least concealed by floods. The exchange of water between the two basins relocates particles from the upper reservoir to the lower lake, where they accumulate during summer in the upper hypolimnion (10 to 20 mg L-1) but also to some extent decrease light availability in the trophic surface layer.
000186883 700__ $$aBonalumi, Matteo$$uEawag Swiss Fed Inst Aquat Sci & Technol, Surface Waters Res & Management, Dubendorf, Switzerland
000186883 700__ $$aAnselmetti, Flavio S.$$uEawag Swiss Fed Inst Aquat Sci & Technol, Surface Waters Res & Management, Dubendorf, Switzerland
000186883 700__ $$0246424$$aWüest, Alfred$$g149162
000186883 700__ $$aSchmid, Martin$$uEawag Swiss Fed Inst Aquat Sci & Technol, Surface Waters Res & Management, CH-6047 Kastanienbaum, Switzerland
000186883 773__ $$j48$$tWater Resources Research
000186883 909C0 $$0252474$$pAPHYS$$xU12616
000186883 909CO $$ooai:infoscience.tind.io:186883$$particle$$pENAC
000186883 917Z8 $$x221818
000186883 937__ $$aEPFL-ARTICLE-186883
000186883 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000186883 980__ $$aARTICLE