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    STUDIA GEOGRAPHIA - Issue no. 2 / 2010  
         
  Article:   ASPECTS REGARDING THE SILTING AND THE BASIN DYNAMICS OF VÂRŞOLŢ RESERVOIR (CRASNA RIVER) .

Authors:  GH. ŞERBAN. 		 
       
         
  Abstract:  Aspects Regarding the Silting and the Basin Dynamics of Vârşolţ Reservoir (Crasna River). Commissioned during the communist period (January 11, 1979) as the only important source of water supply for Zalău City and Şimleul Silvaniei town, Vârşolţ reservoir proved to be a little inspired solution, both in terms of quantity and (mostly) quality. The lake is located in an area with an almost maximal sedimentary discharge in the Romanian territory, which led to an increasing reservoir basin silting and thereby to the attenuation of the basic functions for which it was built (water supply, flash-floods attenuations). During the 30 years of reservoir operating, the characteristic volumes recorded significant percentage reductions ranging between 11 - 23% and even 99% for dead volume. Alluvial share made by Crasna, Coliţca and Mortăuţa tributary rivers led to the emergence of numerous specific forms on the basin space (alluvial cones, alluvial reefs etc.). By the union of the submersible and emersible alluvial cones, developed on the two lobes of the reservoir, a lacustrine delta began to evolve.

Keywords: reservoir, silting, characteristic volumes, sedimentation shapes. 

  
         
     
         
         
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