University of Oulu

Shojaeian, M. R., Karimidastenaei, Z., Rahmati, O., & Haghighi, A. T. (2021). Assessing morphological changes in a human-impacted alluvial system using hydro-sediment modeling and remote sensing. International Journal of Sediment Research, 36(3), 439–448. https://doi.org/10.1016/j.ijsrc.2020.10.004

Assessing morphological changes in a human-impacted alluvial system using hydro-sediment modeling and remote sensing

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Author: Shojaeian, Mohammad Reza1; Karimidastenaei, Zahra1; Rahmati, Omid2;
Organizations: 1Water, Energy and Environmental Engineering Research Unit, University of Oulu, P.O. Box 4300, FIN-90014, Oulu, Finland
2Soil Conservation and Watershed Management Research Department, Kurdistan Agricultural and Natural Resources Research and Education Center, AREEO, Sanandaj 6616936311, Iran
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe202101081369
Language: English
Published: Elsevier, 2021
Publish Date: 2022-10-27
Description:

Abstract

Construction of managed aquifer recharge structures (MARS) to store floodwater is a common strategy for storing depleted groundwater resources in arid and semi-arid regions, as part of integrated water resources management (IWRM). MARS divert surface water to groundwater, but this can affect downstream fluvial processes. The impact of MARS on fluvial processes was investigated in this study by combining remote sensing techniques with hydro-sediment modeling for the case of the Kaboutar-Ali-Chay aquifer, northwestern Iran. The impact of MARS on groundwater dynamics was assessed, sedimentation across the MARS was modeled using a 2D hydrodynamic model, and morphological changes were quantified in the human-impacted alluvial fan using Landsat time series data and statistical methods. Changes were detected by comparing data for the periods before (1985–1996) and after (1997–2018) MARS construction. The results showed that the rate of groundwater depletion decreased from 2.14 m/yr before to 0.86 m/yr after MARS construction. Hydro-sediment modeling revealed that MARS ponds slowed water outflow, resulting in a severe decrease in sediment load which lead to a change from sediment deposition to sediment erosion in the alluvial fan. Morphometric analyses revealed decreasing alluvial fan area and indicated significant differences (p < 0.01) between pre- and post-impact periods for different morphometric parameters analyzed. The rate of change in area of the Kaboutar-Ali-Chay alluvial fan changed from −0.228 to −0.115 km²/year between pre- and post-impact periods.

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Series: International journal of sediment research
ISSN: 1001-6279
ISSN-L: 1001-6279
Volume: 36
Issue: 3
Pages: 439 - 448
DOI: 10.1016/j.ijsrc.2020.10.004
OADOI: https://oadoi.org/10.1016/j.ijsrc.2020.10.004
Type of Publication: A1 Journal article – refereed
Field of Science: 1171 Geosciences
Subjects:
Copyright information: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/