ENV-2023-045 A Three-Tiered Approach to Assess Erosion and Deposition on and Downstream from New Melones Dam's Auxiliary Spillway Final Report
We developed a novel three-tiered approach to quantify and spatially represent zones of
sediment erosion, bedrock erosion, and subsequent sediment deposition associated with a range
of flow events on an unlined spillway at New Melones Dam, located approximately 45 miles
northeast of Modesto, California. Our three-tiered approach includes the application of: (1) the
Sedimentation and River Hydraulics two-dimensional (SRH-2D) sediment transport model to
inform sediment removal and deposition; (2) a two-dimensional (2D) probabilistic erosion model
using the Annandale Erodibility Index Method (Annandale, 1995) to inform the potential for
bedrock erosion across the full spatial extent of the spillway; and (3) the Hurst one-dimensional
(1D) Erosion model (H1DE), a 1D bedrock incision model (Hurst et al., 2021), to inform the
timing and magnitude of vertical incision into bedrock and the potential for knickpoint (headcut)
propagation.
Resources
2 resources available
-
RISE Item Details Page URL for "ENV-2023-045 A Three-Tiered Approach to Assess Erosion and Deposition on and Downstream from New Melones Dam's Auxiliary Spillway Final Report"
HTML -
PDF File for "ENV-2023-045 A Three-Tiered Approach to Assess Erosion and Deposition on and Downstream from New Melones Dam's Auxiliary Spillway Final Report"
PDF
Find Related Datasets
Search by Tags
Click any tag below to search for similar datasets
Complete Metadata
| accessLevel | public |
|---|---|
| accrualPeriodicity | irregular |
| bureauCode |
[ "010:10" ] |
| contactPoint |
{ "fn": "RISE Team", "@type": "vcard:Contact", "hasEmail": "mailto:data@usbr.gov" } |
| description | We developed a novel three-tiered approach to quantify and spatially represent zones of sediment erosion, bedrock erosion, and subsequent sediment deposition associated with a range of flow events on an unlined spillway at New Melones Dam, located approximately 45 miles northeast of Modesto, California. Our three-tiered approach includes the application of: (1) the Sedimentation and River Hydraulics two-dimensional (SRH-2D) sediment transport model to inform sediment removal and deposition; (2) a two-dimensional (2D) probabilistic erosion model using the Annandale Erodibility Index Method (Annandale, 1995) to inform the potential for bedrock erosion across the full spatial extent of the spillway; and (3) the Hurst one-dimensional (1D) Erosion model (H1DE), a 1D bedrock incision model (Hurst et al., 2021), to inform the timing and magnitude of vertical incision into bedrock and the potential for knickpoint (headcut) propagation. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "RISE Item Details Page URL for "ENV-2023-045 A Three-Tiered Approach to Assess Erosion and Deposition on and Downstream from New Melones Dam's Auxiliary Spillway Final Report"", "accessURL": "https://data.usbr.gov/catalog/7983/item/128539", "mediaType": "text/html", "description": "Landing page for "ENV-2023-045 A Three-Tiered Approach to Assess Erosion and Deposition on and Downstream from New Melones Dam's Auxiliary Spillway Final Report"" }, { "@type": "dcat:Distribution", "title": "PDF File for "ENV-2023-045 A Three-Tiered Approach to Assess Erosion and Deposition on and Downstream from New Melones Dam's Auxiliary Spillway Final Report"", "mediaType": "application/pdf", "description": ""ENV-2023-045 A Three-Tiered Approach to Assess Erosion and Deposition on and Downstream from New Melones Dam's Auxiliary Spillway Final Report" as a PDF file", "downloadURL": "https://data.usbr.gov/rise/content-rise-public/rise/catalog-item/binary/NewMelones%20Report_ENV-2023-045_FINAL_110123%20%281%29.pdf" } ] |
| identifier | https://datainventory.usbr.gov/rise/item/128539 |
| keyword |
[ "Dam Safety", "Erosion", "Spillway" ] |
| landingPage | https://data.usbr.gov/catalog/7983/item/128539 |
| modified | 2025-11-19T21:09:06Z |
| publisher |
{ "name": "Bureau of Reclamation", "@type": "org:Organization" } |
| spatial |
"{"type":"Point","coordinates":[-120.525,37.9481]}"
|
| title | ENV-2023-045 A Three-Tiered Approach to Assess Erosion and Deposition on and Downstream from New Melones Dam's Auxiliary Spillway Final Report |
