Quality and Suitability of Surface Irrigation Water in Panjin City

Abstract

【Objective】 This paper presents a comprehensive and rigorous assessment of the environmental quality of surface irrigation water in Panjin City, aimed to provide essential data to help water ecological protection and developing high-quality agriculture. 【Method】 Water samples were taken at normal, wet and dry seasons at different locations across the region to analyze their chemical compositions. Water quality was evaluated using the comprehensive pollution index method, Nemerow comprehensive pollution index method, sodium concentration (SC) method, and the residual sodium carbonate (SRC) method. 【Result】 Water quality indicators varied spatiotemporally. The ammonia nitrogen, chloride and fecal coliform in the water exceeded the values set in the standard. Results calculated from the comprehensive pollution index method showed that the overall quality of the surface irrigation water was good. From normal to dry seasons, water quality changed from clean to relatively clean. There was a seasonal pollution at the sampling points at Dongfeng. The results calculated from the Nemerow comprehensive pollution index method showed that the water quality was relatively good, and that it was better in the wet season than in the normal and dry seasons. There was a seasonal pollution at the sampling points at Tianzhuangtai, Xirao and Shuangrao. As well as the evaluation results of the SC and RSC, the surface water in Panjin City was generally suitable for irrigation, and the water quality in the wet season was better than that in the normal and dry season. 【Conclusion】 The overall surface water quality in Panjin City is relatively good and deemed suitable for irrigation. It can sustain potential development of the region for high-quality agriculture.

Keywords

• panjin
• surface irrigation water
• water quality evaluation
• irrigation applicability