The Study of Nitrate Dispersivity in Sandy Soil Using HYDRUS-1D Model

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AZADIFAR ATEFEH; SOLTANI MOHAMMADI AMIR; MOAZED HADI; FARROKHIAN FIROUZI AHMAD

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Journal: Iranian Journal of Soil and Water Research Year:2017 | Volume:47 | Issue:4 Page(s): 765-774

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Title

The Study of Nitrate Dispersivity in Sandy Soil Using HYDRUS-1D Model

Author(s)

AZADIFAR ATEFEH | SOLTANI MOHAMMADI AMIR | MOAZED HADI | FARROKHIAN FIROUZI AHMAD | Issue Writer Certificate

Keywords

travel distanceQ1

Breakthrough curveQ1

Sandy soil saturationQ1

Pollutant TransferQ1

Abstract

The increasing use of nitrogen fertilizers due to high dynamics of nitrate in the soil would be a serious threat to groundwater, and therefore, to human health. This study is aimed to investigate the dispersivity values of nitrate in the coarse, medium and fine sandy soils in the short travel distance of 20, 40 and 80 cm in vitro using the HYDRUS-1D model. For this purpose, pure potassium nitrate salt solution under the sustainable regime with concentration of 160 (mg/lit) was added to the soil columns as persistent contaminants, then for extracting the needed parameters the concentration of output nitrate in three different porosities volumes were measured and Breakthrough curves were plotted for each column. The results showed that dispersivity increases as the soil particle size increases. Also, by increasing the average travel distance in medium and coarse sands nitrate dispersivity values increased. But in the fine sand the dispersivity values decreased as the transmission distance increased. The dispersivity values for fine, medium and coarse sand were from 30/50 to 42/55 cm, 57/06 to 68/51 cm, and 68/50 to 97/06 cm, respectively. The average model error percent (Er) was less for fine sandy soil, and coefficient of determination (R2) was relatively more for fine sandy soil than the coarse and medium sandy soils, which means the lower error value and higher precision of the overall process in simulation of nitrate transfer in this model for the fine sandy soils.

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APA: Copy

AZADIFAR, ATEFEH, SOLTANI MOHAMMADI, AMIR, MOAZED, HADI, & FARROKHIAN FIROUZI, AHMAD. (2017). The Study of Nitrate Dispersivity in Sandy Soil Using HYDRUS-1D Model. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 47(4 ), 765-774. SID. https://sid.ir/paper/225896/en

Vancouver: Copy

AZADIFAR ATEFEH, SOLTANI MOHAMMADI AMIR, MOAZED HADI, FARROKHIAN FIROUZI AHMAD. The Study of Nitrate Dispersivity in Sandy Soil Using HYDRUS-1D Model. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2017;47(4 ):765-774. Available from: https://sid.ir/paper/225896/en

IEEE: Copy

ATEFEH AZADIFAR, AMIR SOLTANI MOHAMMADI, HADI MOAZED, and AHMAD FARROKHIAN FIROUZI, “The Study of Nitrate Dispersivity in Sandy Soil Using HYDRUS-1D Model,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 47, no. 4 , pp. 765–774, 2017, [Online]. Available: https://sid.ir/paper/225896/en

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