A Study on Water Flow Stability at the Rustic Intake of the Carapongo Channel, Rimac River, Peru

Giovene Perez Campomanes; Karla Karina Romero-Valdez; Justiniano Felix Palomino Quispe; Leopoldo Choque Flores; Roberto Yantas Rivera

doi:10.48084/etasr.17532

Authors

Giovene Perez Campomanes Facultad de Ingenieria, Universidad Continental, Peru https://orcid.org/0000-0003-3515-8935
Karla Karina Romero-Valdez Facultad de Ingenieriay Tecnologia de Mazatlan, Universidad Autonoma de Sinaloa, Mexico https://orcid.org/0009-0004-9978-9431
Justiniano Felix Palomino Quispe Facultad de Ingenieria, Universidad Cesar Vallejo, Peru https://orcid.org/0000-0001-5220-0563
Leopoldo Choque Flores Facultad de Ingenieria, Universidad Cesar Vallejo, Peru https://orcid.org/0000-0003-0914-7159
Roberto Yantas Rivera Facultad de Ingenieria, Universidad Cesar Vallejo, Peru

Volume: 16 | Issue: 3 | Pages: 36826-36831 | June 2026 | https://doi.org/10.48084/etasr.17532

Received: 14 January 2026 | Revised: 3 March 2026, 14 March 2026, 28 March 2026, and 3 April 2026 | Accepted: 5 April 2026 | Online: 6 June 2026

Corresponding author: Giovene Perez Campomanes

Abstract

This research analyzes flow stability at a rustic intake with a side weir in the Carapongo Channel, located in the middle basin of the Rímac River in Peru. The study focused on determining the Vedernikov number and performing hydraulic modeling using HEC–RAS in both lined and unlined channel reaches, considering different cross-sectional geometries and two flow scenarios: 0.45 m³/s and 1.0 m³/s. The results show that, when the weir is not considered, the water flow behavior does not exhibit instability at the rustic intake. The unlined rectangular section shows instability, whereas the trapezoidal configuration improves hydraulic behavior, thereby reducing the risk to the structure. The findings demonstrate that evaluating dimensionless flow stability parameters and numerical modeling are valuable tools for diagnosing and effectively managing channels.

Keywords:

Carapongo rustic intake, flow stability, Vedernikov number, HEC – RAS hydraulic simulation

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