Sediment Transport in the Piura River. Piura, Peru. An application with the HEC-RAS model.
(2024) In TVVR 5000 VVRM01 20241Division of Water Resources Engineering
- Abstract
- This thesis is an investigation of sediment transport in the Piura River in Peru. Years of anthropogenic changes have redirected the river towards the south and have caused changes in the flow regimen (Alvarado Ancieta & Ettmer, 2007). It is suspected that the redirection towards the south has resulted in deposition of sediments which has reduced the capacity of the river in the lower reaches (Reyes Salazar, 2024b). As such, the aim of this thesis is to compare hydraulic conditions of the current route through Virrilá in the south and the original course towards Sechura to assess sediment transport capacity.
HEC-RAS version 6.3.1 is used for hydraulic modelling. The model is calibrated using flow data from the 2017 flood event. Flows of... (More) - This thesis is an investigation of sediment transport in the Piura River in Peru. Years of anthropogenic changes have redirected the river towards the south and have caused changes in the flow regimen (Alvarado Ancieta & Ettmer, 2007). It is suspected that the redirection towards the south has resulted in deposition of sediments which has reduced the capacity of the river in the lower reaches (Reyes Salazar, 2024b). As such, the aim of this thesis is to compare hydraulic conditions of the current route through Virrilá in the south and the original course towards Sechura to assess sediment transport capacity.
HEC-RAS version 6.3.1 is used for hydraulic modelling. The model is calibrated using flow data from the 2017 flood event. Flows of 1,000 m3/s and 3,200 m3/s are computed in steady state for velocity, depth, and shear stress profiles as output. Excess shear is used to assess sediment transport capacity. It was found that the general trend for Virrilá is deposition of sediment in the lower reach, while the course towards Sechura produces considerably larger excess shear values, thereby indicating increased capacity for sediment transport. (Less) - Popular Abstract
- The Piura River basin is regularly subject to flooding during the El Niño climate event. The floods not only affect the economy of the region but also communities bordering the river. The vulnerability of the basin has been influenced by changes in the flow regimen due to redirection of the river. In the past, the river discharged directly into the Pacific Ocean near Sechura. However, due to the construction of dikes, the river currently discharges into the Virrilá Estuary after passing through a series of lagoons. An observed consequence is deposition of sediment in the lower river basin which has reduced the capacity of the river during flood events. The aim of this research is the comparison of the current route through Virrilá and an... (More)
- The Piura River basin is regularly subject to flooding during the El Niño climate event. The floods not only affect the economy of the region but also communities bordering the river. The vulnerability of the basin has been influenced by changes in the flow regimen due to redirection of the river. In the past, the river discharged directly into the Pacific Ocean near Sechura. However, due to the construction of dikes, the river currently discharges into the Virrilá Estuary after passing through a series of lagoons. An observed consequence is deposition of sediment in the lower river basin which has reduced the capacity of the river during flood events. The aim of this research is the comparison of the current route through Virrilá and an alternative route towards Sechura in terms of sediment transport capacity. HEC-RAS was used for hydraulic modelling of the two routes, where output as velocity and depth was used to compare sediment transport capacity. It was found that the alternative route through Sechura features considerably larger transport capacity than the current route through Virrilá. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9170911
- author
- Ladewig Piscoya, Ann Katrin LU
- supervisor
- organization
- course
- VVRM01 20241
- year
- 2024
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- El Niño, sediment transport, Piura River, river redirection, HEC-RAS, 1D river modelling
- publication/series
- TVVR 5000
- report number
- TVVR24/5008
- ISSN
- 1101-9824
- language
- English
- additional info
- Examiner: Erik Nilsson
- id
- 9170911
- date added to LUP
- 2024-07-29 08:13:52
- date last changed
- 2024-07-29 08:13:52
@misc{9170911,
abstract = {{This thesis is an investigation of sediment transport in the Piura River in Peru. Years of anthropogenic changes have redirected the river towards the south and have caused changes in the flow regimen (Alvarado Ancieta & Ettmer, 2007). It is suspected that the redirection towards the south has resulted in deposition of sediments which has reduced the capacity of the river in the lower reaches (Reyes Salazar, 2024b). As such, the aim of this thesis is to compare hydraulic conditions of the current route through Virrilá in the south and the original course towards Sechura to assess sediment transport capacity.
HEC-RAS version 6.3.1 is used for hydraulic modelling. The model is calibrated using flow data from the 2017 flood event. Flows of 1,000 m3/s and 3,200 m3/s are computed in steady state for velocity, depth, and shear stress profiles as output. Excess shear is used to assess sediment transport capacity. It was found that the general trend for Virrilá is deposition of sediment in the lower reach, while the course towards Sechura produces considerably larger excess shear values, thereby indicating increased capacity for sediment transport.}},
author = {{Ladewig Piscoya, Ann Katrin}},
issn = {{1101-9824}},
language = {{eng}},
note = {{Student Paper}},
series = {{TVVR 5000}},
title = {{Sediment Transport in the Piura River. Piura, Peru. An application with the HEC-RAS model.}},
year = {{2024}},
}