caa a22 4500 606200371 CHVBK 20210128100943.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10653-014-9643-2 doi (NATIONALLICENCE)springer-10.1007/s10653-014-9643-2 Long-term evolution of the composition of surface water from the River Gharasoo, Iran: a case study using multivariate statistical techniques [Elektronische Daten] [A. Rezaei, M. Sayadi] We report an assessment of the quality of surface water from the River Gharasoo, Iran, with rainfall data. EC, pH, HCO3 −, Cl−, SO4, Ca2+, Mg2+, Na+, %Na, and sodium adsorption ratio results, monitored monthly by two sampling stations over a period of 40years, were held by the Hydraulic Works Organization in Kermanshah City. Principal-components analysis of the data revealed three factors for each station explaining 90.36 and 79.52% of the total variance in the respective water-quality data. The first factor was chemical components resulting from point and non-point source pollution, especially industrial and domestic waste, and agricultural runoff, as a result of anthropogenic activity. Rainfall had significant negative correlation with bicarbonate only, at a level of 0.05, at station 1. Box-plot analysis revealed that, except for pH, the other studied characteristics were indicative of high pollution at station 1. Among the sources of pollution at station 1, Mg2+ and Cl− data deviated most from normal distribution and included outliers and extremes. Hierarchical cluster analysis showed EC was substantially affected by rainfall. It is thus essential to treat industrial wastewater and municipal sewage from point sources by adoption of the best management practices to control diffuse pollutants and improve water quality of the Gharasoo River basin. Springer Science+Business Media Dordrecht, 2014 Agricultural runoff nationallicence Industrial wastewater nationallicence Municipal sewage nationallicence Water pollution nationallicence Rezaei A. Environmental Department, University of Birjand, Birjand, Iran aut Sayadi M. Environmental Department, University of Birjand, Birjand, Iran aut Environmental Geochemistry and Health Springer Netherlands 37/2(2015-04-01), 251-261 0269-4042 37:2<251 2015 37 10653 https://doi.org/10.1007/s10653-014-9643-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10653-014-9643-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rezaei A. Environmental Department, University of Birjand, Birjand, Iran aut NATIONALLICENCE 700 1- Sayadi M. Environmental Department, University of Birjand, Birjand, Iran aut NATIONALLICENCE 773 0- Environmental Geochemistry and Health Springer Netherlands 37/2(2015-04-01), 251-261 0269-4042 37:2<251 2015 37 10653