基于两种评价方法的内蒙古哈素海水环境质量评价分析
Water Environment Quality Evaluation and Analysis Based on Two Evaluation Methods on Hasuhai Lake in Inner Mongolia
为明确哈素海水质状况,推进内蒙古黄河流域生态保护和高质量发展,2021年夏季(7月)和秋季(10月),对哈素海六个监测点的水环境进行调查研究,并采用单因子评价法和模糊综合评价法分析其水环境质量和影响因素。结果表明,哈素海夏季单因子评价法各监测点水质为Ⅴ类及以上,秋季各监测点水质为Ⅳ类或Ⅴ类; 哈素海夏季模糊综合评价法各监测点水质为Ⅴ类或以下,秋季各监测点水质为Ⅲ类或Ⅳ类;两种方法均表明哈素海秋季水质优于夏季。夏季后河进水口和东南湖区的水质较好,秋季黄河进水口的水质较差,且总氮、总磷是影响 哈素海水质的主要因素。研究表明,单因子评价法和模糊综合评价法对哈素海水质类别评价有差异,模糊综合评价法得到的水质等级优于单因子评价法,但总体趋势基本一致,建议采用两种方法联合评价哈素海的水质。
To investigate the water quality of the Hasuhai Lake and provide basis for promoting ecological protection and high-quality development of the Yellow River basin in Inner Mongolia,the water environment quality and the influencing factors of six monitoring sites set in Hasuhai Lake were surveyed based on single factor evaluation method and fuzzy comprehensive evaluation method in summer(July)and autumn(October)in 2021. The results by single factor evaluation method showed that the water quality of the monitored sites in summer was at Class V or above,and that in autumn was at ClassⅣor ClassⅤ; however, the results by fuzzy comprehensive evaluation method showed that the water quality of the monitored sites in summer was at Class V or below,and that in autumn was at Class Ⅲ or Class Ⅳ; the water quality in autumn was better than that in summer by both of the evaluation methods,and the water quality of Houhe River inlet and Southeast lake area in summer was better,while the water quality of Yellow River inlet in autumn was poorer. The analysis revealed that the total nitrogen and total phosphorus were the main influencing factors on water quality. In summary, there were differences between the two methods on evaluation of the water quality categories of Hasuhai Lake,the water quality grade obtained by fuzzy comprehensive evaluation method was better than that obtained by single factor evaluation method,but the overall trend was basically same. It was suggested that the water quality of Hasuhai Lake should be evaluated by the combination of the two methods.
哈素海 / 模糊综合评价法 / 单因子评价法 / 水环境质量
Hasuhai Lake / fuzzy comprehensive evaluation method / single factor evaluation method / water environment quality
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