PARAMETER SENSITIVITY AND UNCERTAINTY ANALYSIS OF THE MODEL WETSPA IN THE FLOW HYDROGRAPH SIMULATION USING PEST, IN DINVAR BASIN, KARKHEH

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AZINMEHR MARYAM; BAHREMAND ABDOLREZA; KABIR ATENA

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Journal: JOURNAL OF WATERSHED MANAGEMENT RESEARCH Year:2016 | Volume:7 | Issue:13 Page(s): 72-82

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Title

PARAMETER SENSITIVITY AND UNCERTAINTY ANALYSIS OF THE MODEL WETSPA IN THE FLOW HYDROGRAPH SIMULATION USING PEST, IN DINVAR BASIN, KARKHEH

Author(s)

AZINMEHR MARYAM | BAHREMAND ABDOLREZA | KABIR ATENA | Issue Writer Certificate

Keywords

DINVAR BASINQ1

FLOW SIMULATIONQ1

KARKHEH DAMQ1

PESTQ1

SENSITIVITY ANALYSISQ1

UNCERTAINTYQ1

WETSPA MODELQ1

Abstract

The spatially distributed hydrologic model WetSpa is applied to the Dinvar river basin (1717 km2) located in upstream of the KARKHEH DAM. Daily hydro meteorological data from 1382 to 1389, including precipitation data from 9 stations, temperature and evaporation data measured at 4 stations are used as input to the model. The spatial characteristic of the basin is described by three base maps, i.e. DEM, land use and soil type, in GIS form using 100 m cell size. Results of the simulations show a good agreement between calculated and measured hydrographs at the outlet of the basin. The model predicts the daily discharge values with a good accuracy, i.e. about 66% according to the Nash-Sutcliff criterion. Sensitivity and UNCERTAINTY analysis of the model parameters is performed using a model-independent parameter estimator, PEST. It is found that the correction factor for calculating the groundwater flow recession coefficient has the highest relative sensitivity and the parameters kss and kep located in two and three ranks of the relative sensitivity. Parameter UNCERTAINTY analysis shows that parameters ki; kep, kss and kg have high certainty and as well as parameters krain, kmax have low certainty.

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APA: Copy

AZINMEHR, MARYAM, BAHREMAND, ABDOLREZA, & KABIR, ATENA. (2016). PARAMETER SENSITIVITY AND UNCERTAINTY ANALYSIS OF THE MODEL WETSPA IN THE FLOW HYDROGRAPH SIMULATION USING PEST, IN DINVAR BASIN, KARKHEH. JOURNAL OF WATERSHED MANAGEMENT RESEARCH, 7(13), 72-82. SID. https://sid.ir/paper/230278/en

Vancouver: Copy

AZINMEHR MARYAM, BAHREMAND ABDOLREZA, KABIR ATENA. PARAMETER SENSITIVITY AND UNCERTAINTY ANALYSIS OF THE MODEL WETSPA IN THE FLOW HYDROGRAPH SIMULATION USING PEST, IN DINVAR BASIN, KARKHEH. JOURNAL OF WATERSHED MANAGEMENT RESEARCH[Internet]. 2016;7(13):72-82. Available from: https://sid.ir/paper/230278/en

IEEE: Copy

MARYAM AZINMEHR, ABDOLREZA BAHREMAND, and ATENA KABIR, “PARAMETER SENSITIVITY AND UNCERTAINTY ANALYSIS OF THE MODEL WETSPA IN THE FLOW HYDROGRAPH SIMULATION USING PEST, IN DINVAR BASIN, KARKHEH,” JOURNAL OF WATERSHED MANAGEMENT RESEARCH, vol. 7, no. 13, pp. 72–82, 2016, [Online]. Available: https://sid.ir/paper/230278/en

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