Variation entry of sediment, organic matter and different forms of phosphorus and nitrogen in flood and normal events in the Anzali wetland
| العنوان: | Variation entry of sediment, organic matter and different forms of phosphorus and nitrogen in flood and normal events in the Anzali wetland |
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| المؤلفون: | Eisa Ebrahimi, Hossein Asadi, Mehrnosh Joudi, Mehran Rezaei Rashti, Mohammad Bagher Farhangi, Afshin Ashrafzadeh, Maral Khodadadi |
| المصدر: | Journal of Water and Climate Change. 13:434-450 |
| بيانات النشر: | IWA Publishing, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Atmospheric Science, Global and Planetary Change, Management, Monitoring, Policy and Law, Water Science and Technology |
| الوصف: | Phosphorus (P), nitrogen (N) and organic component are released from the soil into surface bodies by runoff and erosion, causing the pollution and eutrophication of water resources. This study aimed to investigate the seasonal changes in loads of N and P components, and organic matter (OM) in the Pasikhan River in flood and normal conditions. Sampling was performed monthly during normal flow conditions and for five flood events. The concentrations of P and N components were measured in the samples. The OM of the suspended sediments was determined by the combustion method. Under the normal flows, the maximum loads of total P and OM were about 0.553 mg l−1 (STD = 0.11) (November) and 3.41% (STD = 1.17) (November) in the autumn, respectively. The total N concentration of 0.533 mg l−1 (STD = 0.12) was observed in the winter. In the flood events, the TP, TN and OM ranged from 0.48 to 3.5 mg l−1, 0.28 to 0.79 mg l−1 and 1.24 to 4.11%, respectively. The results indicated a high risk of eutrophication in the Pasikhan River. Also, the study revealed that in a severe flood event, some 113.9 tons h−1 of OM can be released from the river watershed. Furthermore, there was a high correlation between the amount of P and OM losses with the concentration of suspended sediments in different flood events. Finally, it is concluded that if the floods are not controlled, they not only cause a rapid loss of soil nutrients and OM but also lead to severe eutrophication in the Anzali wetland. |
| تدمد: | 2408-9354 2040-2244 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::392d35ca89e7f755a1d173af9356438eTest https://doi.org/10.2166/wcc.2021.456Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi...........392d35ca89e7f755a1d173af9356438e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24089354 20402244 |
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