Aufsatz in einer Fachzeitschrift
Three-dimensional simulation of Dissolved Oxygen and thermal stratification in order to Adapting the dams to Environmental Strategies (Case Study: Abolabbas reservoir)
Details zur Publikation
Autor(inn)en: | Zamani Gharehchaman, B. |
Publikationsjahr: | 2015 |
Zeitschrift: | Irrigation Sciences and Engineering |
Seitenbereich: | 49-64 |
Abkürzung der Fachzeitschrift: | JISE |
Jahrgang/Band : | 2015 |
ISSN: | 2588-5952 |
eISSN: | 2588-5960 |
Zusammenfassung, Abstract
In this study, a three-dimensional hydrodynamic model (ELCOM) coupled to a water quality and ecosystem model (CAEDYM) were used to simulate Limnological processes, stratification and mixing, and prediction of the released water quality in the Proposed designed reservoir in Southwest Iran (Abolabbas reservoir). So, investigating and Defining the Appropriate outlet levels on the dam wall Which The Other prospective of this study. Different scenarios were Analyzed and designed to simulate different conditions of drought periods in different severities. The results Indicated that, in all scenarios, the reservoir regulated the inflow quality parameters very well via Both powerplant and irrigation outlets. No hypolimnetic anoxia were Observed in the reservoir in normal conditions. The simulation of drought scenarios Showed to overall degradation of all parameters When the drought severity Increases. The drought affected the Dissolved Oxygen Concentration Directly as one of the major environmental water quality indices. During the worst drought scenarios, the anoxia in a 40-meter layer of the hypolimnion bottom Throughout the year and the anoxic outflow for 5 months were Observed. In order to reduce the hypolimnetic anoxia, a scenario with a bottom outlet Decreased by 10 meters below the designed level (to be 14 meters below the irrigation outlet) and hypolimnetic withdrawal Which designed and simulated. While the irrigation outlet That closed, the hypolimnetic withdrawal via bottom outlet reduced the anoxic layer from 40 to 20 meters thickness and THUS reduced the outflow from anoxic 5 to 3 months.
In this study, a three-dimensional hydrodynamic model (ELCOM) coupled to a water quality and ecosystem model (CAEDYM) were used to simulate Limnological processes, stratification and mixing, and prediction of the released water quality in the Proposed designed reservoir in Southwest Iran (Abolabbas reservoir). So, investigating and Defining the Appropriate outlet levels on the dam wall Which The Other prospective of this study. Different scenarios were Analyzed and designed to simulate different conditions of drought periods in different severities. The results Indicated that, in all scenarios, the reservoir regulated the inflow quality parameters very well via Both powerplant and irrigation outlets. No hypolimnetic anoxia were Observed in the reservoir in normal conditions. The simulation of drought scenarios Showed to overall degradation of all parameters When the drought severity Increases. The drought affected the Dissolved Oxygen Concentration Directly as one of the major environmental water quality indices. During the worst drought scenarios, the anoxia in a 40-meter layer of the hypolimnion bottom Throughout the year and the anoxic outflow for 5 months were Observed. In order to reduce the hypolimnetic anoxia, a scenario with a bottom outlet Decreased by 10 meters below the designed level (to be 14 meters below the irrigation outlet) and hypolimnetic withdrawal Which designed and simulated. While the irrigation outlet That closed, the hypolimnetic withdrawal via bottom outlet reduced the anoxic layer from 40 to 20 meters thickness and THUS reduced the outflow from anoxic 5 to 3 months.
