Rhessys - User contributions [en]

Zones

2010-06-22T00:52:05Z

Ctague:

{| {{table}}
| align="center" style="background:#f0f0f0;"|'''Variable Name'''
| align="center" style="background:#f0f0f0;"|'''Description'''
| align="center" style="background:#f0f0f0;"|'''Units'''
|-
| zone_default_ID||Unique identifier used by zone objects to indicate zone default||unique value for each default file
|-
| atm_trans_lapse_rate||Lapse rate of atmospheric transmissivity with elevation||1/metre
|-
| dewpoint_lapse_rate||Lapse rate of dewpoint with elevation||º C /metre
|-
| max_effective_lai||Maximum effective lai to be used with lai temperature adjustment||metres/metres
|-
| lapse_rate||Temperature lapse rate with elevation||º C /metre
|-
| pptmin||Minimum precipitation to intiate cloud cover||metres
|-
| sea_level_clear_sky_trans||Sea level clear sky transmissivity||range (0 - 1)
|-
| temcf||Daylight average temperature coefficient||dimensionless (0.212 if sine from assumed)
|-
| trans_coeff1||Coefficients used in calculation of atm. transmissivity adjustment||dimensionless
|-
| trans_coeff2||Coefficients used in calculation of atm. transmissivity adjustment||dimensionless
|-
| wind||Wind speed||metres / s
|-
| max_snow_temp||Maximum temperature at which precip falls as snow||º C
|-
| min_rain_temp||Minimum temperature at which precip falls as rain||º C
|-
| ndep_NO3||Nitrogen depostion as NO3||NEEDS A UNIT!
|-
| lapse_rate_tmin ||Minimum temperature lapse rate with elevation (defaults to lapse rate) ||º C/meter **
|-
| lapse_rate_tmax ||Maximum temperature lapse rate with elevation (defaults to lapse rate) ||º C/meter **
|}

"**" optional - if not included default value used

Climate data

2010-06-22T00:47:54Z

Ctague: added tmin and tmax lapse rates as optional climate parameters

Climate inputs are linked to particular zones by the climate station ID affiliated with that zone. A single climate station (or base station) will typically serve multiple zones within the landscape. Each base station is described by a base station file.

Example Base Station File:
<pre>
101 base_station_id
100.0 x_coordinate
100.0 y_coordinate
22.9 z_coordinate
2.0 effective_lai
22.9 screen_height
clim\rbw_prime_annual annual_climate_prefix
0 number_non_critical_annual_sequences
clim\rbw_prime_monthly monthly_climate_prefix
0 number_non_critical_monthly_sequences
clim\rbw daily_climate_prefix
2
ndep_NO3
ndep_NH4
0
clim\rbw_prime_hourly hourly_climate_prefix
0 number_non_critical_hourly_sequences
</pre>

{| {{table}}
| align="center" style="background:#f0f0f0;"|'''Climate Input Sequence Name / File Extension'''
| align="center" style="background:#f0f0f0;"|'''Description'''
| align="center" style="background:#f0f0f0;"|'''Units'''
|-
| rain||precipitation (rain + snow)* required||meters
|-
| tmin||minimum daily temperature* required||°C
|-
| tmax||maximum daily temperature* required||°C
|-
| dayl||day length||seconds
|-
| daytime_rain_duration||duration of rainfall||hours
|-
| LAI_scalar||zone and seasonal scaling of LAI -<br> only applied to stratum of non-zero height||Unitless
|-
| Ldown||incoming longwave radiation||KJ / (meters2)/day
|-
| Kdown_direct||incoming direct shortwave radiation||KJ / (meters2)/day
|-
| Kdown_diffuse||incoming diffuse shortwave radiation||KJ / (meters2)/day
|-
| ndep_NO3||nitrogen deposition as NO3||kg / (meters2)/day
|-
| ndep_NH4||nitrogen deposition as NH4||kg / (meters2) /day
|-
| PAR_direct||incoming direct PAR radiation||KJ / (meters2)/day
|-
| PAR_diffuse||incoming diffuse PAR radiation||KJ / (meters2)/day
|-
| relative_humidity||Relative Humidity||Range (0-1)
|-
| tday||Mean Daytime Temperature||°C
|-
| tnightmax||Night time temperature at sundown (used for soil heat flux)||°C
|-
| tsoil||Soil temperature||°C
|-
| vpd||Vapour pressure deficit||Pa
|-
| wind||Wind speed||meters/ sec.
|-
| CO2||Carbon Dioxide||parts per million/year
|-
| lapse_rate_tmin || minimum daily temperature lapse rate with elevation || °C/m
|-
| lapse_rate_tmax || maximum daily temperature lapse rate with elevation || °C/m

|}

All possible base station filenames must be listed in the worldfile header, as described in the discussion of grass2world below.

Format for Time Series Input Files
The first line of each input time series file must give the start date of the time series. The start date of the input must precede the start date listed in the worldfile. Following the start date, time series values are listed sequentially. For example:
example_simulation_daily.rain will contain the following

<pre>
1986 1 1 1
0.0028
0.000
0.0157
0.000
…
</pre>

How to get RHESSys

2009-10-30T01:20:08Z

Ctague: /* Dependencies */

===Getting the source===
The source for RHESSys and various tools for use with RHESSys is hosted on [http://sourceforge.net/projects/rhessys/ sourceforge] and
accessible via anonymous subversion access. For the latest stable release, check out<br>

'''<pre>svn co https://rhessys.svn.sourceforge.net/svnroot/rhessys/tags/5.12.4</pre>'''

For the latest development version, check out

'''<pre>svn co https://rhessys.svn.sourceforge.net/svnroot/rhessys/trunk/</pre>'''

Be warned that the trunk is highly unstable and may not even compile.

===Building RHESSys===

The RHESSys source tree contains three separate tools: rhessys, cf, and g2w. Note that default values
are specified in the makefiles. This means if you choose to override them you must specify the
<code>-e</code> option when running <code>make</code>. As a convenience there is a makefile at the trunk
of the source tree that will build and install all RHESSys programs. Before running that file, make sure that
you have set all necessary environment variables as listed below.

====rhessys====
=====Dependencies=====
*None

=====Build Instructions=====
<code>$> make; make install</code>

=====Environmental Variables=====
{| {{table}}

| align="center" style="background:#f0f0f0;"|Name
| align="center" style="background:#f0f0f0;"|Description
| align="center" style="background:#f0f0f0;"|Default
|-
| RHESSYS_BIN
| The path of the RHESSys installation location
| /usr/local/bin
|-
|PGM
|Name of the RHESSys binary prodouced
|rhessys<version>
|-
|CC
|C Compiler to use
|gcc
|}

====cf====
=====Dependencies=====
None

=====Build Instructions=====
<code>$> make; make install</code>

=====Environmental Variables=====
{| {{table}}

| align="center" style="background:#f0f0f0;"|Name
| align="center" style="background:#f0f0f0;"|Description
| align="center" style="background:#f0f0f0;"|Default
|-
| RHESSYS_BIN
| The path of the RHESSys installation location
| /usr/local/bin
|-
| PGM
| Name of the create flowpaths executable
| cf
|-
|GISBASE
|Base GRASS install
|none, this variable must be set
|-
|CC
|C Compiler to use
|gcc
|}

====g2w====
=====Dependencies=====
* GRASS version 6.x

=====Build Instructions=====
<code>$> make; make install</code>

=====Environmental Variables=====
{| {{table}}

| align="center" style="background:#f0f0f0;"|Name
| align="center" style="background:#f0f0f0;"|Description
| align="center" style="background:#f0f0f0;"|Default
|-
| RHESSYS_BIN
| The path of the RHESSys installation location
| /usr/local/bin
|-
| PGM
| Name of the grass2world executable
| g2w
|-
|GISBASE
|Base GRASS install
|none, this variable must be set
|-
|CC
|C Compiler to use
|gcc
|}

RHESSys

2009-10-30T01:18:04Z

Ctague: /* RHESSys Tutorial */

== Using RHESSys ==

[[How to get RHESSys]]

[[Directory structure]]

== RHESSys Tutorial ==

[[Preparing input data sets]]

[[Generating RHESSys input files]]

[[Calibrating and running RHESSys]]

[[Visualizing Spatial Output]]

==RHESSys File Formats==

[[Climate data]]

[[Default files]]

[[Worldfiles]]

==GRASS GIS==

[[Developing custom GRASS programs]]

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