Hamidreza Shahradnia; Atefeh chamani; Mehrdad Zamanpoore
Abstract
Macrobenthos can serve as a bioindicator for natural or anthropogenic environmental changes. Ghareh-Aghaj River is one of the most important rivers in Fars province that supply potable, agricultural and industrial water. This study aimed to investigate the changes of macrobenthos in different months ...
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Macrobenthos can serve as a bioindicator for natural or anthropogenic environmental changes. Ghareh-Aghaj River is one of the most important rivers in Fars province that supply potable, agricultural and industrial water. This study aimed to investigate the changes of macrobenthos in different months and stations for one year from September 2018 to August 2019 to determine the water quality of Ghareh-Aghaj River in Fars province. For this purpose, 10 stations were selected from 190 kilometers of river length and sediment samples collected once every 45 days. Identifications were done using binocular stereomicroscope and benthic identification keys. BMWP, ASPT and Shannon Wiener indices were used to evaluate water quality. From the midstream zone to the Persian Gulf (stations 7 to 10) has severe pollution. These stations are surrounded by extensive farmlands that use pesticides and herbicides in a large scale, resulting agricultural runoff containing a variety of contaminants flowsinto the river. In addition, in the downstream stations, especially in Kavar (Station 7), the effluent of sand mines flows into the river, which has caused a severe change in the ecosystem of the lake. According to the results, the water quality of Ghareh-Aghaj River is relatively badand placed in the category of moderate to severe polluted
Elaheh Niknam; Atefeh chamani; mohsen nourouzi
Abstract
The purpose of this study is to conduct a qualitative analysis of Zayandeh-rood River water using benthic invertebrate communities in fall 2017 to Spring 2018. To do so, we select 6 stations and 3 sediment samples were collected in each stations. Sediment samples were fixated and various animals were ...
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The purpose of this study is to conduct a qualitative analysis of Zayandeh-rood River water using benthic invertebrate communities in fall 2017 to Spring 2018. To do so, we select 6 stations and 3 sediment samples were collected in each stations. Sediment samples were fixated and various animals were extracted from the samples and were grouped and identified according to fauna benthic identification keys were used for the identification of the sample. Finally, in spring 8 family belongs to 6 order; in autumn 11 family belongs to 7 order and in winter 6 family belongs to 4 order were identified. According to all indices, all stations and all seasons were in polluted category. Regarding the Zayandeh-rood drought, during the last decade, the flow of water in the river, especially the refinery stations and the Shakh-kenar and Sharif Abad, is practically the industrial wastewater, sewage of the cities and adjacent villages. For this reason, contaminated species in these ecosystems are species resistant to pollution.
