Open Sustainable Technology

A curated list of open technology projects to sustain a stable climate, energy supply, biodiversity and natural resources.

Browse accepted projects | Review proposed projects | Propose new project | Open Issues

SHUD

A multi-process, multi-scale integrated hydrological model using the semi-discrete Finite Volume Method.
https://github.com/SHUD-System/SHUD

finite-volume hydrology river shud watershed

Last synced: 22 minutes ago
JSON representation

Repository metadata

Simulator for Hydrologic Unstructured Domains (SHUD) --- multi-scale and multi-process integrated hydrological model

README

        

# Simulator for Hydrologic Unstructured Domains

## Brief

The Simulator for Hydrologic Unstructured Domains (SHUD - pronounced “SHOULD”) is a multi-process, multi-scale hydrological model where major hydrological processes are fully coupled using the semi-discrete **Finite Volume Method** (FVM).

Ongoing applications of the SHUD model include hydrologic analyses of hillslope to regional scales (1 $ m^2 $ to $10^6$ $\mbox{km}^2$), water resource and stormwater management, and interdisciplinary research for questions in limnology, agriculture, geochemistry, geomorphology, water quality, ecology, climate and land-use change. The strength of SHUD is its flexibility as a scientific and resource evaluation tool where modeling and simulation are required.

- **Maintainner**: Lele Shu ([[email protected]](mailto:[email protected]))
- **Website (中文)**: [www.shud.xyz/](https://www.shud.xyz/)
- **Website (English)**: [www.shud.xyz/en/](https://www.shud.xyz/en/)
- **User Guide**: [https://www.shud.xyz/book_cn/](https://www.shud.xyz/book_cn/)
- **Support tools**: rSHUD. [https://github.com/SHUD-System/rSHUD](https://github.com/SHUD-System/rSHUD)
- **Programming**: C/C++
- **Platform**: Mac OS, Linux and Windows
- **Required library**: SUNDIALS/CVODE V6.0+
- **Parallelization** : OpenMP

## Overview

The Simulator for Hydrologic Unstructured Domains (SHUD) is a multi-process, multi-scale model where major hydrologic processes are fully coupled using the **Finite Volume Method (FVM)**. SHUD encapsulates the strategy for the synthesis of multi-state distributed hydrologic models using the integral representation of the underlying physical process equations and state variables.

The conceptual structure of the ***two-state integral-balance*** model for soil moisture and groundwater dynamics was originally devised by (Duffy, 1996), in which the partial volumes occupied by unsaturated and saturated moisture storage were integrated directly into a local conservation equation. This two-state integral-balance structure simplified the hydrologic dynamics while preserving the natural spatial and temporal scales contributing to runoff response.

SHUD's design is based on a concise representation of a watershed and river basin's hydrodynamics, which allows for interactions among major physical processes operating simultaneously, but with the flexibility to add or drop state-process-constitutive relations depending on the objectives of the numerical experiment.

![figure1](Fig/figure1.png)

The latest version of SHUD (v2.0) supports the simulation of coupled lake model.
![Lake coupling](Fig/lake.png)

As an intellectual descendant of Penn State Integrated Hydrologic Model (**PIHM**), the SHUD model is a continuation of 16 years of PIHM model development in hydrology and related fields since the release of its first PIHM version (Qu, 2004).

![Figure_tree](Fig/Figure_tree.png)

###The formulation and results from SHUD.

- SHUD is a physically-based process spatially distributed catchment model. The model applies national geospatial data resources to simulate surface and subsurface flow in gaged or ungaged catchments. SHUD represents the spatial heterogeneity that influences the hydrology of the region based on national soil data and superficial geology. Several other groups have used PIHM, a SHUD ancestor to couple processes from biochemistry, reaction transport, landscape, geomorphology, limnology, and other related research areas.

- SHUD is a fully-coupled hydrologic model, where the conservative hydrologic fluxes are calculated within the same time step. The state variables are the height of ponding water on the land surface, soil moisture, groundwater level, and river stage, while fluxes are infiltration, overland flow, groundwater recharge, lateral groundwater flow, river discharge, and exchange between river and hillslope cells.

- The global ODE system in SHUD is solved with a state-of-the-art parallel ODE solver, known as CVODE developed at Lawrence Livermore National Laboratory.

- SHUD permits adaptable temporal and spatial resolution. The spatial resolution of the model varies from centimeters to kilometers based on modeling requirements computing resources. The internal time step of the iteration is adjustable and adaptive; it can export the status of a catchment at time-intervals from minutes to days. The flexible spatial and temporal resolution of the model makes it valuable for coupling with other systems.

- SHUD can estimate either a long-term hydrologic yield or a single-event flood.

- SHUD is an open-source model, available on GitHub.

## Compilation (Linux or Mac) and run the example watersheds

**Step 0: download the latest source code**

```
git clone [email protected]:SHUD-System/SHUD.git
cd SHUD
```

**Step 1: Install SUNDIALS/CVODE 6.x:**

```
./configure
```

This configure is to download the SUNDIALS from GitHub and install it on your computer.

**Step 2: Compile SHUD with gcc**

```
make clean
make shud

```

If you don't use `gcc`, you may edit the *Makefile* before compiling.

**Step 3: Run the North Fork Cache Creek Watershed example**

```
./shud ccw
```

The screen looks shoud be:
![screenshot](Fig/screenshot.png)

**Step4: Analysis the results of modeling.**

The output files from the SHUD model is save in `./output/ccw.out`. The R package, SHUDtoolbox, helps to load the input/output files of SHUD. More details about prepare SHUD data, model input/output and visualization is available in SHUD website (https://www.shud.xyz) and help information of SHUDtoolbox.


Owner metadata


GitHub Events

Total
Last Year

Committers metadata

Last synced: 24 days ago

Total Commits: 179
Total Committers: 3
Avg Commits per committer: 59.667
Development Distribution Score (DDS): 0.223

Commits in past year: 25
Committers in past year: 1
Avg Commits per committer in past year: 25.0
Development Distribution Score (DDS) in past year: 0.0

Name Email Commits
Lele Shu l****u@g****m 139
Lele Shu L****u 38
Solver for Hydrological Unstructure Domain (SHUD) 5****l 2

Committer domains:


Issue and Pull Request metadata

Last synced: 1 day ago

Total issues: 2
Total pull requests: 1
Average time to close issues: 2 days
Average time to close pull requests: N/A
Total issue authors: 2
Total pull request authors: 1
Average comments per issue: 0.5
Average comments per pull request: 0.0
Merged pull request: 0
Bot issues: 0
Bot pull requests: 0

Past year issues: 2
Past year pull requests: 0
Past year average time to close issues: 2 days
Past year average time to close pull requests: N/A
Past year issue authors: 2
Past year pull request authors: 0
Past year average comments per issue: 0.5
Past year average comments per pull request: 0
Past year merged pull request: 0
Past year bot issues: 0
Past year bot pull requests: 0

More stats: https://issues.ecosyste.ms/repositories/lookup?url=https://github.com/SHUD-System/SHUD

Top Issue Authors

  • lj-cug (1)
  • spiritonly (1)

Top Pull Request Authors

  • GISerGJL (1)

Top Issue Labels

Top Pull Request Labels

Score: 4.430816798843313