| Integrated Monitoring of Hydrological and Turbidity Response in a Karst Spring to Extreme Events: Coupling Remote Sensing and Field Measurements in the Kouhrang Watershed, Iran |
| کد مقاله : 1063-NIEGC2025 |
| نویسندگان |
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Mehdi Alikhani1، علی اصغر قائدی وانانی *2، Mohamad Eslami3، Yusof Ghaisi4 1Department of Civil Engineering, Islamic Azad University, Shahrekord Branch, Iran 2دانش آموخته دکتری تخصصی زمین شناسی، دانشگاه تربیت مدرس 3Master's degree in Tectonic Geology, Faculty of Basic Sciences, Shiraz University 4Department of Geography and Environmental Management, University of Waterloo, Waterloo, Canada |
| چکیده مقاله |
| Karst springs are susceptible to surface processes and extreme climatic events. This study investigates changes in discharge and turbidity at the Kouhrang Karst Spring, one of the main drinking water sources in Chaharmahal and Bakhtiari Province, following a flash flood in August 2022 and over 16 months thereafter (August 2022 to December 2023). Field data, including continuous measurements of spring discharge and turbidity, along with precipitation and air temperature records, were combined with remote sensing indices such as the Soil Adjusted Vegetation Index (SAVI) and Normalized Difference Snow Index (NDSI) derived from Landsat 8 imagery to analyze the spring’s response to land cover changes, snowmelt, and surface erosion. Results showed that the August flood triggered a sudden turbidity spike of 350 NTU, followed by sustained turbidity levels above 10 NTU for 16 months. Two secondary turbidity peaks (125 and 70 NTU) coincided with snowmelt periods and elevated temperatures. These findings highlight the role of extreme events and subsurface hydrologic connectivity in sustaining turbidity and reducing the reliability of karst drinking water sources. To ensure a sustainable drinking water supply, targeted interventions such as vegetation restoration, sediment check dams, and stabilization of erosion-prone nodes are recommended to protect spring water quality. |
| کلیدواژه ها |
| Karst Spring, Turbidity Dynamics, Flash Flood, Remote Sensing |
| وضعیت: پذیرفته شده برای ارسال فایل های ارائه پوستر |