The effect of land use changes and hydroclimatic indices on sediment yield in the Minab

Document Type : Research Article

Authors

1 University of Hormozgan

2 Hormozgan

3 Department of Natural Resources Engineering and Statistics, Faculty of Agricultural and Natural Resources Engineering, University of Hormozgan, Bandarabbas, Iran.

4 Department of Mathematics and Statistics, Faculty of Science, University of Hormozgan, Bandarabbas, Iran

5 Department of Statistics

Abstract

Changes in land use and climatic variables cause changes in sediment yield, filling of reservoirs in dams, and challenges in the demand of residents of the region for access to fresh water. Therefore, understanding the trend of hydroclimatic indicators to evaluate the impact of climatic and hydrological changes on sediment yield seems very necessary. The purpose of this study is to investigate the effect of land use changes and hydroclimatic indicators on sediment production in the Minab Basin using Mann-Kendall and Pettit trend analysis. The results showed that there is no significant trend in rainfall, but the maximum flood discharge, volume and concentration of sediment have a significant increasing trend that occurred in the 1980s. On the other hand, the investigation of land use changes in the Minab basin during the last three decades, 1990, 2005 and 2021, showed that 11% of the area of pasture lands decreased and agricultural and residential lands increased by 220 and 280%, respectively. Therefore, despite the non-significance of the precipitation trend, due to obvious land use changes that have a controlling role on the flood peak flow and sediment production, an increase in the peak flow and sediment production is evident in the basin.

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Volume 11, Issue 1
March 2024
Pages 67-84
  • Receive Date: 25 November 2023
  • Revise Date: 01 February 2024
  • Accept Date: 10 March 2024
  • First Publish Date: 20 March 2024
  • Publish Date: 20 March 2024