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Hydrograph separation using ionic concentration measurement
 Vondrka, A. ; Šír, Miloslav ; Tesař, Miroslav
In this article a method of hydrograph separation based on ionic concentration measurement is discussed. The goal of the method described is to distinguish the “old” and “new” water flowing in a stream in the closing profile of a small mountainous catchment. The “new water” is the rain water or the soil water which contact with the soil has a very short duration, a few minutes or hours. The term “old water” denotes water which was stored in the soil cover for many days or weeks. The Na+ and K+ ions will be used as the tracers distinguishing the “old” and “new” water. Namely, it is known that the concentration of the K+ ion in the soil water is decreasing according the growing duration of the contact of water with soil and plants roots. Ionic concentration will be measured with the help of ion selective electrodes. Two and three component separation algorithm will be used for the hydrograph separation.
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