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Model determination of the chemical forms of iron and nickel in the surface waters
Kubínová, Petra
The paper is focused on the evaluation of the possible chemical forms of occurrence of the elements iron and nickel in the surface waters in the experimental catchment Lesní potok (Černokostelecko region). The program PhreeqC (version 2.4.2.) was used for the speciation calculations. There is used the time period from November 2005 to May 2006 as the input data in the evaluation. The redox conditions markedly influence the content of the individual chemical forms of studied elements. Studied elements are present mainly in their mobile (divalent) state during the year. In the extreme case, i.e. during the snow melt, the values of redox potential are considerably higher and the concentration of trivalent state of iron (and nickel) is increasing.
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Natural flooding in Lužnice floodplain - an holistic approach
Pithart, David ; Montagová, Martina ; Hartvich, P. ; Černý, R. ; Prach, K.
Natural flooding was analysed in the Lužnice River floodplain in a holistic approach. Benefits of natural flooding can be summarised as folows: 1. Water retention is increased due to the soil absorption, evapotranspiration, filling of oxbows, pools and natural depressions and finally the space between the river terreces. Real flood event are analysed here in terms of water distribution among these processes. 2. Natural flooding reduces the loss of ionts from the watershed by flowing the river outflouw and loss of carbon loss by slowing the decomposition processes. 3. Flooding creates and maintains floodplain geobiodiversity by re-forming of floodplain subsystems and differentation of its impact on these subsystems. For these reasons, maintaining and enchenging of natural flooding seems to be a prerequisite of sustainable management of riverine landscape.
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Thermophysical properties of ordinary water substance /KKE-20-2001/
Mareš, R. ; Šifner, Oldřich
The necessity of the replacement of IAPS-84 formulation with the new formulation IAPWS-IF97 is stressed in our report. Sources of the IF97 formulation, Steam Tables and software based on the new formulation are summarized. A proposal of Statement on t**computation of thermodynamic properties of ordinary (light) water substance is presented We presume that the Statement will be attached to the Report IAERA-TECDOC-949 or separately published in the data base of IAEA. News from the 2001 Annual IAPWS Me
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Computation of thermodynamic, transport and other properties of water and steam according to the standards of the International association for the properties of water and steam : IAPWS
Šifner, Oldřich ; Mareš, R. ; Kadrnožka, J.
Included is a brief information on the industrial formulation of thermodynamic propertis of water and steam IAPWS-IF97, in detail are described new or revised formulations of thermal conductivity, dynamic viscosity, surface tension, static dielectrictant, refractive index, equations for the melting and sublimation curves and simplified equations of saturation propertiies of ordinary water substance according to the IAPWS Standards. Attached are tables of selected properties.
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