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Technical Service Center
Sedimentation and River Hydraulics Group


Sedimentation and River Hydraulics - One Dimension (SRH-1D) is a hydraulic and sediment transport numerical model developed to simulate flows in rivers and channels with or without movable boundaries. Variants of the model include:

Download SRH-1D

Download the lastest release: SRH-1D v3.1.1 Package (28.2MB Self-Extracting RAR Archive).

About SRH-1D

SRH-1D (Sedimentation and River Hydraulics - One Dimension) is a one-dimensional mobile boundary hydraulic and sediment transport computer model for rivers and manmade canals. Simulation capabilities include steady or unsteady flows, internal boundary conditions, looped river networks, cohesive and non-cohesive sediment transport, and lateral inflows. The model uses cross section based river information.

The model simulates changes to rivers and canals caused by sediment transport. It can estimate sediment concentrations throughout a waterway given the sediment inflows, bed material, hydrology, and hydraulics of that waterway.

Potential Applications

Specific applications demonstrate potential uses of the model including:

Applicability and Limitations

SRH-1D uses one-dimensional solutions for flow simulation. It should not be applied to situations where two-dimensional or three-dimensional models are needed to represent local hydraulic conditions. SRH-1D is based on the sub-channel concept. Secondary currents, transverse movement, transverse variation, and lateral diffusion are ignored. Therefore, the model cannot simulate such phenomena as river meandering, point bar formation, pool-riffle formation, and many plan form changes. It may not be able to simulate local deposition and erosion caused by water diversions, bridges and other instream structures. SRH-1D is currently compiled to run only within the Windows 7 64-bit operating system.


SRH-1D can simulate:



SRH-1D is an applied research model. Contact Blair Greimann (303) 445-2563 for availability and more information.

Reclamation does not have a mandate or funding to provide support for in-house modeling software. These models comprise part of our capability in providing sedimentation and river hydraulic services to our clients and are presented here for reference.