Pollution Research Paper

Vol 34, Issue 3, 2015; Page No.(489-496)

TREND ANALYSIS OF LONG-TERM WATER QUALITY FOR ZOHRE RIVER WATER, IRAN

MEHDI AHMADI1, MARYAM RAVANBAKHSH, KAMBIZ AHMADI AND BAHMAN RAMAVANDI

Abstract

The Zohre River, which is one of four major river systems in Iran, plays an important role as a water resource for agriculture, industry and municipalities in the southwest area of Iran. Low, medium and high values of a water parameter are very important issues in climatological, meteorological and hydrological events. Moreover these values are used to decide various design parameters based on scientific aspects and real applications everywhere in the world. Statistical analysis is essential to analyze environmental data and to identify trends of pollutants over space and time. With this concept, a method proposed by Mann–Kendall was used for water parameters trend. The data of four different stationsat the Zohre River (Kheir Abad, Dehmolla stations, Chambostan and Poleflour) were analyzed for the period 1967–2012. Monthly recorded water electrical conductivity (EC), total dissolved solids (TDS), HCO3 ", SO4 2", Cl”, Na+, K+, Mg2+, Ca2+, water flow rate (m3/s), sodium adsorption ratio (SAR), total cations, and total anions were studied. These parameters have been measured by the Khuzestan Water and Power Authority, Iran. Results demonstrated in Chambostan, Kheir Abad, Dehmola, and Poleflure stations Ca2+ and Mg2+ has upward trends due to agricultural activities especially sugar cane drainage. Accordingly, the river issue may need to be factored into the proper establishment of regulatory load requirements and the development of watershed implementation plans.

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