06-WRF-Hydro-Postprecess.Rmd

---
title: "Hands-on Traning"
subtitle: '06-WRF-Hydro Post-processing'
author: "Chuliang Xiao"
date: "5/25/18"
output:
  xaringan::moon_reader:
    lib_dir: libs
    css: xaringan-themer.css
    nature:
      highlightStyle: github
      highlightLines: true
      countIncrementalSlides: false
      ratio: "16:9"
---

```{r xaringan-themer, include=FALSE}
library(xaringanthemer)
```

#Using git to connect GitHub  
* To clone  
```git
git clone https://github.com/ChuliangXiao/Training.git
```

* To update 
```git
cd Training
git pull
```
---

# Outline
 
#### Review of WRF-Hydro Workflow 

#### WRF-Hydro Input and Output
* WRF-Hydro Output  
    + ASCII: `frxst_pts_out.txt`   
    + NetCDF: `201101010000.CHANOBS_DOMAIN1`   

* Comparison with USGS 

* Mean-area Precipitation  

---

# Offline WRF-Hydro Workflow    
<div align="center">
<img src="WRF-Hydro-Workflow.png" width=800 height=480>
</div>
(Courtesy **WRF-Hdyro Training Material**) 

---

# WRF-Hydro Workflow  
<div align="center">
<img src="WRF-Hydro-Workflow-Executable.png" width=800 height=480>
</div>
(Courtesy **WRF-Hdyro Training Material**) 

---



# WRF-Hydro Output  
```
/glade2/scratch2/cxiao/Champlain/Stream
```

* Download USGS discharge     
`download.US.R`  

* Read in `YYYYMMMDDDHH.CHANOBS.DOMAIN1`  
`read.CHRTOUT.US.R`  

* Caclulate Mean Area Precipitation  
`MAP.R` with function from `Calc_Mean_Areal.R`  

* Plot Hydrograph  
`Hydrograph.Comp.US.ggplot2.png.R`  
---

# Plot Hydrograph 


---

# Iterative run  
.pull-left[
* Currently, WRF-Hydro is restated manually. 
    + Submit a job with maximum time  
    + Ouput restart files every 15 day  
    + Restart WRF-Hydro every 2-3 years  
        - Find the most recent restart point  
        - Change the start point `namelist.hrlads` and `hydro.namelist` 
        - Submit a new job  
]

.pull-right[
* Automatically WRF-Hydro restart run  
    + A normal inital run  
    + Automatical restart    
        - No model crash 
        - One year restart interval  
        - Restart at the beginning of the year  
]