Determining the Relationships between Geomorphology Factors with Types of Water Erosion on a sub-watershed of the Hablehrood Catchment

Document Type : Research

Authors

1 Associate Professor of Geomorphology, Faculty of Humanity, University of Mazandaran, Babolsar, Iran

2 M.Sc. in Hydro geomorphology, Faculty of Humanity, University of Mazandaran, Babolsar, Iran

Abstract

Forms of erosion demonstrate its intensity. The study area is one of the suitable rangelands for animal husbandries in the Province of Semnan, which is subjected to a plethora of water erosion forms due to an overuse of the land. Therefore, it is necessary to investigate the effective factors in an aggravation of water erosion conditions in this area to manage and control it. Erosion in arid and semi-arid regions is intense; therefore, it is necessary to take action to inhibit or reduce it. As the forms of erosion are identifiable, we tried to determine the relationships between geomorphologyand forms of water erosion, namely: sheet, rill, gully and badland in a sub-watershed of the Hablehroodcatchment. Different classes of lithology, slope, aspect and elevation were correlated with any of forms of erosion in the area to determine their variety in the development and dominant erosion on each of the classes and each factor. Using the guidelines of the Land Degradation Assessment in Drylands (LADA), the forms of erosion in terms of its intensity was ranked and was used according to the typology of the variables. The Kruskal-Wallis test was on. The results indicated that the highly developed forms of water erosion, gullies and badlands, marl, gypsum and salt formations (8.4 and 15.8%), an elevation of 1000-1200 meters, the slope of 10-20% (8.7 and 15%) and the southern aspects domain (5.7 and 9.5%) respectively. The result of Kruskal-Wallis test for the slope and aspect at 0.01 and elevation at 0.05, respectively, were found to be significant, which indicated that there were specified differences in the forms of water erosion at the specified classes of geomorphologyfactors of the area. Therefore, geomorphologyfactors may be used to assess forms of water erosion and its intensity in similar regions.

Keywords

References

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History

  • Receive Date: 08 March 2020
  • Revise Date: 12 June 2020
  • Accept Date: 20 September 2020

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