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OTTAR-0.3.0
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مشاهده بیشترتوضیحات
Ode To Transient Ancho de los Rivers: Transient evolution of river-channel width
| ویژگی | مقدار |
|---|---|
| سیستم عامل | OS Independent |
| نام فایل | OTTAR-0.3.0 |
| نام | OTTAR |
| نسخه کتابخانه | 0.3.0 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Andrew D. Wickert |
| ایمیل نویسنده | awickert@umn.edu |
| آدرس صفحه اصلی | https://github.com/MNiMORPH/ottar |
| آدرس اینترنتی | https://pypi.org/project/OTTAR/ |
| مجوز | - |
[](https://zenodo.org/badge/latestdoi/261265317)
# OTTAR
Ode To Transient Ancho de los Rivers
Transiently evolving river-channel width as a function of streambank properties, sediment in transport, and the hydrograph.
## Purpose
This model is designed to compute the rates of river-channel widening and narrowing based on changing hydrological regimes. It is currently designed for rivers with cohesive banks, with a critical shear stress for particle detachment and an erosion-rate coefficient.
## Installation
From PyPI:
```sh
pip install ottar
```
Locally, inside a clone of this git repository (the `-e` permits you to make local updates to the code and have them incorporated into the way that OTTAR runs):
```sh
pip install -e .
```
## Structure
OTTAR contains:
* The `RiverWidth` class, which contains methods to evolve the width of an alluvial river.
* The `FlowDepthDoubleManning` class, which is used to estimate flow depth from discharge, even with an evolving river-channel geometry.
## Examples
There's a [folder for these](https://github.com/MNiMORPH/OTTAR/tree/master/examples)!
## Model inputs and outputs
### Inputs
#### Key input parameters (RiverWidth)
| **Variable** | **Description** | **Typical value(s)** |
|-------------- |------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |----------------------------- |
| `h_banks` | **Stream-bank height**. This is the thickness of material that must be removed for the river to widen by one unit lateral distance. | 1-5 m |
| `S` | **Channel downstream-directed slope**. This is used to compute shear stresses and (if necessary) flow depth from water discharge. | 10<sup>-3</sup> |
| `tau_crit` | **Critical shear stress required to start eroding muddy banks**. At this stress, the flow begins to be able to detach particles. When set up to perform an **inversion** using data on river widening and past flows, this is one of two key parameters to be estimated for rivers with detachment-limited banks. | 1–10 Pa |
| `k_d` | **Erosion-rate coefficient**. This determines the rate of erosion as a function of shear stress above critical. When set up to perform an **inversion** using data on river widening and past flows, this is the other of two key parameters to be estimated. | ~10<sup>-7</sup> m / (Pa s) |
| `k_n` | **Narrowing coefficient**. This modulates the efficiency of channel narrowing via lateral sediment transport and deposition. It may relate to bar/bank structure and/or to vegetation growth and its ability to trap and stabilize sediment. | ~10<sup>-2</sup> |
| `b0` | **Initial width**. Starting width of a channel | 1–1000 m |
#### Key input data sets and parameters (FlowDepthDoubleManning)
*This step is used to compute flow depths from a discharge time series, and may be skipped if you already posess a time series of flow depth*
* Discharge time series
* Manning's n (channel)
* Roughness / topogrpahy coefficient (floodplains)
* Depth / topography exponent (floodplains)
### Outputs
This program outputs a time series of channel width, `b(t)`. It organizes this within a Pandas DataFrame that can also be exported using the `write_csv()` function within the `RiverWidth` class.
Plots can also be made of just river width (`plotb()`) or of discharge and river width (`plotQb`).
نیازمندی
| مقدار | نام |
|---|---|
| - | matplotlib |
| - | numpy |
| - | pandas |
| - | scipy |
نحوه نصب
نصب پکیج whl OTTAR-0.3.0:
pip install OTTAR-0.3.0.whl
نصب پکیج tar.gz OTTAR-0.3.0:
pip install OTTAR-0.3.0.tar.gz