Masoud et al. (2026) Deriving Soil Conservation Service Curve Numbers for Ephemeral Stream Beds From In Situ Double Ring Infiltration Tests

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Hydrological Processes
• Year: 2026
• Date: 2026-01-01
• Authors: Milad Masoud, Mohammed M. Farran, Amro Elfeki, Burhan Niyazi
• DOI: 10.1002/hyp.70384

Research Groups

Not explicitly stated in the abstract.

Short Summary

This study characterized soil parameters using infiltration models from 25 double-ring infiltrometer tests in Jazan Province, proposing a model for temporal SCS-CN evolution and validating ultimate CN values for improved flood simulation in the region.

Objective

• To characterize soil parameters and derive a relationship for Soil Conservation Service Curve Number (SCS-CN) values using infiltration models to improve rainfall-runoff predictions, specifically investigating the temporal evolution of CN and validating ultimate CN values for flood simulation in the Jazan Province.

Study Configuration

• Spatial Scale: Basins of Jazan Province, Saudi Arabia, with validation in the alluvium of Wadi Liyyah.
• Temporal Scale: Short-term infiltration tests (double-ring infiltrometer) and analysis of observed rainfall-runoff events over an unspecified period for validation.

Methodology and Data

• Models used: Horton, Philip, and Green–Ampt infiltration models. A proposed model for the temporal evolution of the SCS-CN.
• Data sources:
  • In situ double-ring infiltrometer tests (25 tests).
  • Observed rainfall-runoff events in the alluvium of Wadi Liyyah.

Main Results

• The Horton, Philip, and Green–Ampt infiltration models effectively analyzed the in situ data, showing no significant differences among them.
• A model was proposed to describe the temporal evolution of the SCS-CN from its initial to ultimate states.
• Initial infiltration SCS-CN values ranged from 25 to 51.
• Ultimate infiltration SCS-CN values, derived from saturated hydraulic conductivity, ranged from 39 to 68.
• These ultimate SCS-CN values were validated against observed SCS-CN from rainfall-runoff events in Wadi Liyyah, which ranged from 38 to 70 at abstraction ratios (λ) of 0.01 and 0.2, respectively, with 99% confidence.
• The study recommends using ultimate infiltration to estimate the SCS-CN in flood simulation studies within this region.

Contributions

• Proposed a novel model for describing the temporal evolution of SCS-CN values, addressing the subjectivity of traditional SCS-CN table values.
• Provided a methodology for characterizing soil parameters and deriving SCS-CN values directly from in situ infiltration tests.
• Validated ultimate SCS-CN values with observed rainfall-runoff data, enhancing the reliability of flood predictions for the study region.
• Offered a specific recommendation for SCS-CN estimation (using ultimate infiltration) to improve flood simulation studies in the Jazan Province.

Funding

Not explicitly stated in the abstract.

Citation

@article{Masoud2026Deriving,
  author = {Masoud, Milad and Farran, Mohammed M. and Elfeki, Amro and Niyazi, Burhan},
  title = {Deriving Soil Conservation Service Curve Numbers for Ephemeral Stream Beds From In Situ Double Ring Infiltration Tests},
  journal = {Hydrological Processes},
  year = {2026},
  doi = {10.1002/hyp.70384},
  url = {https://doi.org/10.1002/hyp.70384}
}