Examining the relationship between hydrogeomorphic variables and sediment in Gavi and Kanjancham basins of Ilam province

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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:

Sedimentation is one of the most important issues in the watershed. Due to the problems caused by sediment, it is necessary to investigate the relationship between hydrogeomorphic variables affecting sediment production and suspended sediment load in the watershed. The purpose of this study is to model the relationship between suspended sediment loads with hydrogeomorphic variables of the basin and to extract geomorphic features and their relationship with sedimentation in the watershed. By simple random method, two cows and conifers, which include 8 specific sub-basins and are equipped with hydrometric stations, were selected. Statistical multivariate regression method was used to analyze the relationship between geomorphic variables with sedimentation of each sub-basin. The results of the study of the relationship between geomorphic characteristics and sedimentation of sub-basins showed that the amount of sediment produced was positively correlated with slope index, roundness, drainage texture, rainfall, unevenness and basin area and was significant at the level of 0.001. In order to influence the variables on the sedimentation rate of the sub-basins, the principal component analysis and cluster analysis methods were used. The results showed that the three factors of roundness coefficient, slope coefficient and drainage texture coefficient of the basin explain 44.62, 25.22 and 16.74% of the variance of all research variables, respectively. In total, the three final extracted factors were able to explain 87% of the variance of all research variables.

Language:
Persian
Published:
Hydrogeomorphology, Volume:8 Issue: 29, 2022
Pages:
109 to 126
https://www.magiran.com/p2406797  
سامانه نویسندگان
  • Asgari، Shamsollah
    Corresponding Author (1)
    Asgari, Shamsollah
    Assistant Professor Geomorphology,
  • Jafari، Mohammadreza
    Author (3)
    Jafari, Mohammadreza
    Assistant Professor Natural Resources and Watershed Management Research,
  • Shirani، Kourosh
    Author (4)
    Shirani, Kourosh
    Associate Professor Water and Soil Conservation Engineering Researches,
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