![]() ![]() The measurements were conducted in two seasons, winter and spring, using RAD7 continuous radon monitoring detector manufactured by Durridge company, USA.įor winter season, (85) water samples were collected from different locations the period of assessment was two months (from December, 1st 2018 to February, 1st 2019). In the present study, seasonal measurements of radon activity concentration were carried out for water and soil of Sawa Lake, Samawa City-South of Iraq. According to these factors, thirteen springs have been selected as follow: Bayjan, Mahallat-Hotel, Avaj, Aala, Larijan, Delir, Lavij, Ramsar, Semnan, Lavieh, Legahi, Kooteh-Koomeh and Sarein. Concentration of Radon in spring, spring discharge, water temperature and the closeness of spring location to active faults, have been considered as the significant factors to select the best spring for a Radon continuous monitoring site implementation. Radon concentration was measured with RAD7 detector in the more than 40 springs. In this work, an algorithm based on Dobrovolsky equation with defining the Expectation and Investigation circles for great Tehran has been used. There are equal experimental equations about the relation between earthquake magnitude and its effective distance on Radon concentration variations. Based on previous researches, Radon is a short-term precursor of earthquake from the view point of time. A review of studies has been done so far, denoted that Radon gas shows more sensitivity than other geo-gas as a precursor. Construction of the models which can explain these anomalies, prompt scientists to monitor geophysical and geochemical characteristics in the seismic areas for earthquake prediction. Earthquakes usually occur after some preliminary anomalies in the physical and chemical characteristics of environment and earth interior.
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