Spatial distribution and mapping of risk elements pollution in agricultural soils of southern Tehran, Iran
2010
Hani, A.,Islamic Azad Univ., Tehran (Iran Islamic Republic). Dept. of Agriculture and Natural Resources | Pazira, E.,Islamic Azad Univ., Tehran (Iran Islamic Republic). Faculty of Agriculture and Natural Resources | Manshouri, M.,Islamic Azad Univ., Tehran (Iran Islamic Republic). Dept. of Water Sciences and Engineering | Babaie Kafaky, S.,Islamic Azad Univ., Tehran (Iran Islamic Republic). Dept. of Agriculture and Natural Resources | Ghahroudi Tali, M.,Tarbiat Moalem Univ., Tehran (Iran Islamic Republic). Geography Dept.
In order to evaluate risk elements and their spatial distribution in agricultural fields south of Tehran, statistics, geostatistics and geographic information system (GIS) were used. The content of Hg, As, Pb, Mo, and Be were determined in 106 samples. The results showed that primary inputs of As and Hg were due to anthropogenic sources, while Pb, Mo and Be were associated with pedogenic and anthropogenic factors. Ordinary kriging was carried out to map the spatial patterns of risk elements and disjunctive kriging was used to quantify the probability of risk elements concentrations higher than their guide value. The results show that As, Hg, Mo and Be exhibit pollution risk in the study area. The high pollution sources evaluated were related with usage of urban and industrial wastewater for agricultural practice. The results of this study are helpful for risk assessment of environmental pollution for decision making for vegetable production and ecosystem improving.
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