LABORATORY STUDY OF GROUNDWATER POLLUTION WITH NITRATE: 2-EFFECT OF WATER AND OLIVE POMACE APPLICATIONS | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 1, Volume 30, Issue 7, July 2005, Page 4263-4276 PDF (1.5 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2005.235804 | ||||
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| Author | ||||
| G. M. K Abdel-Nasser | ||||
| Soli and Agricultural Chemistry Dept, Faculty of Agriculture (Saba bacha) AlexandrIa University | ||||
| Abstract | ||||
| The pollution of groundwater by nitrate Is an international probtem due to excess rates of N fertilization used in modern agriculture. Water application and soil organic matter content can have a major influence on nitrate teaching. Therefore. with increasing concern for the influence of N03 leaching into the groundwater. the objective of the present study were: 1) studying the role of water application rate and soil organic matter content on leaching at NO) out of soil columns, 2) measuring the lotal NO) leached from the soil column and 3) evaluating the numerical (HYDRUS-2D) and analytical(CXTFIT) models to predict the N03 leaching. The present results indicate that increasing the water application rate increased the N03 leaching. The N03 leaching ranged between 0.0 to 100% of added nitrate as water application increased from 0.025 to 0.125 cmfhr. On the other hand. increasing application of organiC matter to soil decreased the amount of N03 leached from soil columns. The NO) leaching ranged between 90.96 to 25.47% of added nitrate as organic matter application increased from 0 to 10% (wfw). The numerical model (HYDRUS-20) and analytical model (CXTF1T) were successfully predicted NOJ leaching in the present study (R2 values of between observed and estimated ranged from 0.992 to O.999). | ||||
| Keywords | ||||
| Nitrale pollution; groundwater pollution; nitrate leaching· CXTFIT model; numerical solution; analy1ical solution; HYDRUS; 20 model | ||||
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