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A comparison between natural forests and reforested lands in terms of runoff generation potential and hydrologic response (case study: Kasilian Watershed)

Author

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  • Esmaeili Hoseen GHOLZOM

    (Faculty of Natural Resources, Islamic Azad University, Savadkooh Branch, Savadkooh, Iran)

  • Vahid GHOLAMI

    (Department of Range and Watershed Management, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran)

Abstract

Afforested lands are different from natural forests in terms of hydrologic conditions, runoff generation potential, and sediment generation rate. These differences emerge due to changes in soil structure and vegetation density, litter amount, trees heights, and so on. In this study, a comparison has been made between natural forests and afforested lands in Kasilian - a watershed located in Mazandaran province, Northern Iran. To achieve this purpose, harmonious units have been defined by overlay analysis of these layers in GIS environment: slope, aspect, Digital Elevation Model (DEM) and soil. Then, the location of couple plots was defined by field studies in the harmonious units. The plot locations were selected in a way that runoff generation was a function of tree species and tree conditions, assuming that rainfall intensity is equal in all areas. Initial loss and runoff volume were measured in even plots after rainfall. Then, the initial loss parameter in a rainfall-runoff model was applied to compare runoff volume and peak discharge in the afforested lands and natural forests. The rainfall-runoff model was presented using GIS and HEC-HMS model. The results showed that reforested lands have lower infiltration, lower initial loss, and higher runoff due to lower density, canopy, litter, and soil compaction. Furthermore, the runoff generation potential of reforested lands is several times higher than that of natural forests.

Suggested Citation

  • Esmaeili Hoseen GHOLZOM & Vahid GHOLAMI, 2012. "A comparison between natural forests and reforested lands in terms of runoff generation potential and hydrologic response (case study: Kasilian Watershed)," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 7(4), pages 166-173.
    • Handle: RePEc:caa:jnlswr:v:7:y:2012:i:4:id:18-2012-swr
    DOI: 10.17221/18/2012-SWR
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    References listed on IDEAS

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    1. Vikrant Jain & R. Sinha, 2003. "Derivation of Unit Hydrograph from GIUH Analysis for a Himalayan River," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 17(5), pages 355-376, October.
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    Cited by:

    1. P. Dalir & R. Naghdi & V. Gholami, 2014. "Modelling of forest road sediment in the northern forest of Iran (Lomir Watershed)," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 60(3), pages 109-114.
    2. Mohammad Reza KHALEGHI, 2017. "The influence of deforestation and anthropogenic activities on runoff generation," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 63(6), pages 245-253.
    3. Mohammad Reza KHALEGHI, 2018. "Application of dendroclimatology in evaluation of climatic changes," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 64(3), pages 139-147.

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