Abstract

Dez River in Iran is a long river and has generally good-quality water. Unfortunately, in this river water quality has decreased over recent years due to drought, industrial and agricultural developments. Dez River plays a significant role in moderating the quality of Karun River After adjoining it. So, maintaining good water quality of Dez River is very important. In this case study, water quality index was evaluated in an 8-year period with regard to the growth of industry and drought occurrence. The calculated Iran Water Quality Index showed values of 70.1–85. This index reduced from extremely good to good for DEZ River. Simulation of some water quality parameters (electrical conductivity, dissolved oxygen, carbonaceous biochemical oxygen demand, NH₄-N, NO₃-N, and pH) were evaluated using Water Quality Model (Qual2k). The observed data in July 2012 and March 2013 were used for calibration and validation of the Qual2k model respectively. In conclusion, the Qual2k model was proposed as a suitable tool for water quality assessment and forecast in the future.

中文翻译：

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水质指数和水质模型QUAL2K在伊朗代兹河中污染物评估中的应用

摘要

伊朗的Dez河是一条长河，水质一般。不幸的是，由于干旱，工农业的发展，近年来这条河的水质有所下降。毗邻后，Dez河在降低卡伦河的水质方面起着重要作用。因此，保持德兹河的良好水质非常重要。在本案例研究中，针对工业发展和干旱发生情况，在8年中对水质指数进行了评估。计算得出的伊朗水质指数显示为70.1–85。该指数从DEZ River的极好降低到了好。模拟某些水质参数（电导率，溶解氧，含碳生化需氧量，NH ₄ -N，NO ₃-N和pH）使用水质模型（Qual2k）进行评估。2012年7月和2013年3月的观测数据分别用于Qual2k模型的校准和验证。总之，提出了Qual2k模型，作为将来进行水质评估和预测的合适工具。