Background and Purpose

The Karoon River, located in southwest Iran, has always been considered as an important water source for people in the southward areas. Khuzestan Province is one of the strategic provinces of Iran thus the development of this province is significantly affected by the water pollution of the Karoon River system. Therefore, the current study aims to assess the environmental vulnerability of the Karoon River as well as preparing a classified map of its vulnerabilities using the fuzzy logic method via the geographical information systems (GIS).

Methods

In this study, the required data were gathered from the Water and Electricity Organization of Khuzestan Province. Afterward, the primary maps were created by converting the map of the study origin into a raster format. Then, fuzzy membership was performed by placing the digits in the range of zero and one using the fuzzy membership function. The primary maps were mixed, and finally, the risk map was prepared by applying the fuzzy overly function.

Results

According to the results, a clear trend of water quality deterioration exists since water moves from upstream to downstream areas. The ecological vulnerability of the Karoon basin is mostly located at a low-level (78.05 %) rank. The vulnerable areas were ranked extremely high, high, medium, and low as 2.09, 8.09, 12.08, and 78.05, respectively.

Conclusions

Considering that 22 % of the Karoon River drainage basin in Khuzestan province is considered to have a medium to extremely high risk range, it is mandatory for the authorities to take precautions to prevent the entry of polluting sources into this precious river.

中文翻译：

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使用地理信息系统对伊朗最大河流环境脆弱性进行空间建模

背景和目的

位于伊朗西南部的卡隆河一直被认为是南部地区人们的重要水源。胡齐斯坦省是伊朗的战略省份之一，因此该省的发展受到卡隆河水系水污染的显着影响。因此，目前的研究旨在评估卡伦河的环境脆弱性，并通过地理信息系统 (GIS) 使用模糊逻辑方法制作其脆弱性的分类地图。

方法

在这项研究中，所需数据来自胡齐斯坦省水电组织。之后，通过将研究原点的地图转换为栅格格式来创建原始地图。然后，通过使用模糊隶属函数将数字置于零和一的范围内来执行模糊隶属。混合原始图，最后应用模糊叠加函数制作风险图。

结果

结果表明，水从上游流向下游，水质恶化趋势明显。卡伦盆地生态脆弱性多位于低级（78.05%）。易受害区域排名极高、高、中、低分别为2.09、8.09、12.08和78.05。

结论

考虑到胡齐斯坦省卡隆河流域的 22% 被认为具有中到极高的风险范围，当局必须采取预防措施，防止污染源进入这条宝贵的河流。