Management of Natural Ecosystems

Management of Natural Ecosystems

Investigation of groundwater level fluctuations using Integrated Hydrologic model (case study: East Faryab basin)

Document Type : Original Article

Authors
1 Coach, Department of Ecological Engineering, Faculty of Natural Resources, University of Jiroft, Jiroft, Iran
2 Professor, Department of Reclamation of Arid and Mountainous Regions, Faculty of Natural Resources, University of Tehran, Karaj, Iran
3 Professor, Faculty of New Science and Technology, University of Tehran, Tehran, Iran.
4 Division of water resources engineering, Lund University, Lund, Sweden
Abstract
Nowadays, according to high importance of groundwater’s sustainable management, modelling and predicting of groundwater level, are used to investigate and assess of water resources. The purpose of this research is to Predicting of groundwater level in eastern Faryab aquifer by use of parflow as well as model functional assessing, that are done by comparing Water level data predicted by the model and observed groundwater level data in piezometers in the aquifer, Therefore, groundwater level data of 23 piezometers were extracted on year of 2010 (January 1, 2010 to December 31, 2010).and compared with the predicted data. Computations and comparing were for average data of all piezometersand Also, a separate comparison of piezometers was done. The results showed that the value of the correlation coefficient of observed and predicted data was 0.8822, which indicates a high correlation between real and modeled data.In addition, in 3 piezometers, the correlation is below one percent And 13 piezometers also obtained a high correlation of 0.75, worth mentioned that 7 of them are over 90%. The maximum coefficient is observed in Jozfotan, located on the central toward of west section with a value of 0.9814, while minimum is observed in Gharbe Kuhan, on the upward west section of the aquifer which was 0. 0026.after ponding the results, it is clear that, central toward west and west’s upwards, comparing to east parts of the aquifer that are the outlet of the basin, shows a better coefficient. The more likely reasons, sounds to be models uncertainty as well as investigation of East Faryab basin as separated basin and aquifer (not connecting aquifer), while Jiroft aquifer more probably has a common line with the aquifer and need to be considered precisely. Also, based on the results, it was found that the Parflow model simulates the groundwater level and its change process with acceptable accuracy and in the three piezometers of Kohemeta, Tajabbad, Ismaeilabadeballa, where the underground water level is low (below ten meters), the predicted values of the underground water level have been overestimated.
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  • Receive Date 26 June 2024
  • Revise Date 22 July 2024
  • Accept Date 22 July 2024