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Rainfall-Erosivity and Vegetation Dynamics for Sediment Management in Rainwater-Harvesting Systems of the Deli Watershed
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Amin Zoratipour *   , Kohzad Heidary |
| Department of Nature Engineering, Faculty of Agriculture |
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Abstract: (12 Views) |
| Sediment is a recurrent operational constraint in rainwater-harvesting and small watershed-control systems. It reduces effective storage, obstructs inlets and conveyance paths, increases maintenance requirements, and can transfer erosion problems from contributing slopes to downstream structures. In semi-arid mountain watersheds, these impacts are not governed by a single long-term average: a small number of erosive years may dominate sediment pressure, while vegetation recovery or degradation changes the resistance of the land surface. The present study addresses this temporal dimension in the 105.20 km² Deli watershed, upstream of the Jarreh reservoir in Khuzestan Province, Iran. Its objective was to determine whether annual variation in a relative RUSLE-based erosion-response index during 2005–2025 was primarily associated with rainfall erosivity or vegetation-derived surface protection, to identify statistically defensible changes and extreme years, and to translate the results into an operational screening framework for sediment management in rainwater-harvesting systems. This objective is distinct from spatial hotspot and sediment-connectivity mapping: the analytical unit here is the annual watershed response and its climatic and cover controls. |
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Article number: 7 |
| Keywords: change-point detection, extreme years, modified Fournier index, multi-sensor monitoring, operational sediment control |
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Type of Study: Research |
Subject:
Special
Received: 2026/08/25 | Revised: 2026/09/23 | Accepted: 2026/10/15 | ePublished ahead of print: 2026/10/15
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