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Tian Gan

Utah State University | Graduate Student

 Recent Activity

ABSTRACT:

This resource includes the data analysis code and results using a subset of the model simulation of snow water equivalent for the watershed of Dolores River above McPhee reservoir in the Colorado River Basin from 1988 to 2010. The model used is the Utah Energy Balance model which is a physically based snow melt model.

The data analysis code used NetCDF Operator commands (http://nco.sourceforge.net). It first subsets the data from January to May, 2009 to identify the maximum snow water equivalent for each grid cell within this period and write the result to a new NetCDF file (max.nc). It then subsets the data for April 1st and 15th, 2009 (april_1.nc, april_15.nc) and evaluates the snow water equivalent difference between the two dates to create a new NetCDF file (diff.nc). This provides the analysis result for accumulation (increase) or ablation (decrease) during this period. Water managers often track such snow water equivalent changes in water supply forecasts

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ABSTRACT:

This resource includes the data analysis code and results using a subset of the model simulation of snow water equivalent for the watershed of Dolores River above McPhee reservoir in Colorado River Basin from 1988 to 2010. The model used is the Utah Energy Balance model which is a physically based snow melt model.

The data analysis code used NetCDF Operator commands (http://nco.sourceforge.net). It first subsets the data from January 1st to May 30th, 2009 to identify the maximum snow water equivalent for each grid cell within this period and write the result to a new NetCDF file (max.nc). It then retrieves the data for April 1st and April 15th (april_1.nc, april_15.nc) and evaluates the snow water equivalent difference between the two dates to create a new NetCDF file (diff.nc). This provides the analysis result for accumulation (increase) or ablation (decrease) during this period. Water managers often track such snow water equivalent changes in water supply forecasts

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ABSTRACT:

This resource includes the simulation and observation discharge data and corresponding data analysis code for Dolores River watershed. The observation data is from USGS gage station. The basin discharge simulation was created by coupling Utah Energy Balance snowmelt model and Sacramento Soil Moisture Accounting (SAC-SMA) runoff model.
This resource is aimed to demonstrate how to use the Jupyter Notebook to repeat the data analysis process. To test please use the link to access the app (https://jupyter.cuahsi.org/hub/login)

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ABSTRACT:

This resource stores the Sciunit object to help repeat the model input preparation and model execution for basin discharge simulation in Dolores River watershed using the Sacramento Soil Moisture Accounting (SAC-SMA) runoff model. The rain plus melt input for SAC-SMA model was created from the Utah Energy Balance snowmelt model output (https://www.hydroshare.org/resource/8f9320123baa4ef1b4a304f0ce20ab08/)

This Sciunit object is a container that enables reproduction of the modeling process without software installation. The JupyterHub web app in HydroShare can help execute the Sciunit object.

In this resource, there are 2 Sciunit objects:
earthcube_use_case.zip: a Sciunit object which supports SAC-SMA model simulation for a water year
use_case.zip: a demo Sciunit object which supports SAC-SMA model simulation for 1 month

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ABSTRACT:

This resource collects all the data and code to illustrate reproducibility of hydrologic modeling research, which coupled Utah Energy Balance (UEB) snowmelt model with the Sacramento Soil Moisture Accounting (SAC-SMA) run-off model as part of the National Weather Service Research Distributed Hydrologic Modeling Framework to simulate the basin snowmelt process and discharge for the Dolores River watershed. This research is aimed to evaluate the Utah Energy Balance (UEB) model performance using Daymet input for water supply forecast in the study watershed. It is also aimed to demonstrate how to use different web based apps and software to support reproducible hydrologic modeling research.

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Resources
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Collection 0
Composite Resource 0
Generic 0
Geographic Feature 0
Geographic Raster 0
HIS Referenced Time Series 0
Model Instance 0
Model Program 0
MODFLOW Model Instance Resource 0
Multidimensional (NetCDF) 0
Script Resource 0
SWAT Model Instance 0
Time Series 0
Web App 0
Model Instance Resource Model Instance Resource
valid_winter park_longtime
Created: Oct. 3, 2016, 4:25 p.m.
Authors: Tian Gan

ABSTRACT:

It was created using HydroShare UEB model inputs preparation application which utilized the HydroDS modeling web services. The model inputs data files include: watershed.nc, aspect.nc, slope.nc, cc.nc, hcan.nc, lai.nc, vp0.nc, srad0.nc, tmin0.nc, tmax0.nc, prcp0.nc. The model parameter files include: inputcontrol.dat, param.dat, control.dat, outputcontrol.dat, siteinitial.dat. This model instance resource is complete for model simulation.

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Model Instance Resource Model Instance Resource
Red Butte water year
Created: Nov. 1, 2016, 9:38 p.m.
Authors: Tian Gan

ABSTRACT:

It was created using HydroShare UEB model inputs preparation application which utilized the HydroDS modeling web services. The model inputs data files include: watershed.nc, aspect.nc, slope.nc, cc.nc, hcan.nc, lai.nc, vp0.nc, srad0.nc, tmin0.nc, tmax0.nc, prcp0.nc. The model parameter files include: inputcontrol.dat, param.dat, control.dat, outputcontrol.dat, siteinitial.dat. This model instance resource is complete for model simulation.

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Model Instance Resource Model Instance Resource
Logan River Watershed (Jupyternote book original ueb_setup)
Created: Aug. 3, 2017, 4:28 p.m.
Authors: Tian Gan

ABSTRACT:

This is prepared by running the ueb_setup.py file without using the logan watershed raster tif file

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Model Instance Resource Model Instance Resource

ABSTRACT:

This is created using the user raster of logan watershed. The ueb_setup.py file is modified which does not include the watershed delineation.

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Model Instance Resource Model Instance Resource
Logan River Watershed (app version)
Created: Aug. 11, 2017, 6:45 p.m.
Authors: Tian Gan

ABSTRACT:

It was created using HydroShare UEB model inputs preparation application which utilized the HydroDS modeling web services. The model inputs data files include: watershed.nc, aspect.nc, slope.nc, cc.nc, hcan.nc, lai.nc, vp0.nc, tmin0.nc, tmax0.nc, srad0.nc, prcp0.nc, ueb_setup.py, hydrogate.py. The model parameter files include: inputcontrol.dat, control.dat, param.dat, outputcontrol.dat, siteinitial.dat. This model instance resource is complete for model simulation.

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Composite Resource Composite Resource
Plot of UEB and SAC-SMA output
Created: Sept. 5, 2017, 9:11 p.m.
Authors: Tian Gan

ABSTRACT:

This is a demo of makeing plot for UEB output data

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Composite Resource Composite Resource
Testing NetCDF file type
Created: Oct. 5, 2017, 9:37 p.m.
Authors: Tian Gan · Gonzalo E. Espinoza-D\303\241valos

ABSTRACT:

This is to test the OPeNDAP web app

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Model Instance Resource Model Instance Resource

ABSTRACT:

It was created using HydroShare UEB model inputs preparation application which utilized the HydroDS modeling web services (https://github.com/CI-WATER/Hydro-DS). The model inputs data files include: watershed.nc, aspect.nc, slope.nc, cc.nc, hcan.nc, lai.nc, vp0.nc, tmin0.nc, tmax0.nc, srad0.nc, prcp0.nc, ueb_setup.py, hydrogate.py. The model parameter files include: control.dat, param.dat, inputcontrol.dat, outputcontrol.dat, siteinitial.dat. This model instance resource is complete for model simulation and the corresponding model output files are also included.

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Model Instance Resource Model Instance Resource
UEB snowmelt simulation for Animas watershed
Created: Dec. 6, 2017, 7:03 p.m.
Authors: Tian Gan

ABSTRACT:

It was created using HydroShare UEB model inputs preparation application which utilized the HydroDS modeling web services. The model inputs data files include: watershed.nc, aspect.nc, slope.nc, cc.nc, hcan.nc, lai.nc, vp0.nc, tmin0.nc, tmax0.nc, srad0.nc, prcp0.nc, ueb_setup.py, hydrogate.py. The model parameter files include: control.dat, param.dat, inputcontrol.dat, outputcontrol.dat, siteinitial.dat. This model instance resource is complete for model simulation.

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Multidimensional (NetCDF) Multidimensional (NetCDF)
Test netCDF data
Created: Jan. 6, 2018, 9:48 p.m.
Authors: Tian Gan

ABSTRACT:

This is used for testing of the Hyrax server data download

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Model Instance Resource Model Instance Resource
Demo for creating a new model input package
Created: Jan. 15, 2018, 11:38 p.m.
Authors: Tian Gan

ABSTRACT:

This is a demo to modify the model input workflow python code to create a new model input package.

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Web App Resource Web App Resource
OPeNDAP
Created: Feb. 27, 2018, 6:40 p.m.
Authors: David Tarboton

ABSTRACT:

This is the web app connector for the OPeNDAP service for content aggregations within Composite resources in HydroShare. The OPeNDAP service is available only for the "Public" composite resources. Due to current Hyrax deployment limitations this does not work for large NetCDF files. Exact upper limit unknown, but has been tested up to 200 MB successfully.

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Composite Resource Composite Resource
Multidimensional space-time data analysis using NCO
Created: March 5, 2018, 10:44 p.m.
Authors: Tian Gan

ABSTRACT:

This is an example to demonstrate how to use NetCDF Operator (NCO) software and OPeNDAP service to access and analyze the Multidimensional (NetCDF) resource https://www.hydroshare.org/resource/f3f947be65ca4b258e88b600141b85f3/ .

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Composite Resource Composite Resource
Sciunit object for basin discharge simulation
Created: Aug. 2, 2018, 12:47 a.m.
Authors: Tian Gan

ABSTRACT:

This sciunit object has two executions.
- e1 is using UEB output "SWIT.nc" to prepare rain-plus-melt input xmrg files for RDHM sac model. Results saved in "SAC_input" folder.
- e2 is using the xmrg files to run RDHM sac model to generate time series output of basin discharge. Results saved in "SAC_out" folder.

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Composite Resource Composite Resource
Sciunit object for RDHM UEB+SAC model run
Created: Aug. 2, 2018, 9 p.m.
Authors: Tian Gan

ABSTRACT:

This is testing running RDHM ueb+sac with sciunit

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Model Instance Resource Model Instance Resource

ABSTRACT:

It was created using HydroShare UEB model inputs preparation application which utilized the HydroDS modeling web services. The model inputs data files include: watershed.nc, aspect.nc, slope.nc, cc.nc, hcan.nc, lai.nc, vp0.nc, tmin0.nc, tmax0.nc, srad0.nc, prcp0.nc, ueb_setup.py, hydrogate.py. The model parameter files include: control.dat, param.dat, siteinitial.dat, inputcontrol.dat, outputcontrol.dat. This model instance resource is complete for model simulation. The corresponding model output is also included in the resource. Use the HydroShare user account and the link to access the UEB web app (https://appsdev.hydroshare.org/apps/ueb-app/)

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Composite Resource Composite Resource

ABSTRACT:

This is the model simulation of snow water equivalent from RDHM framework.

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Composite Resource Composite Resource
UEB model simulation of snow water equivalent in Logan River watershed from 2008 to 2009
Created: Nov. 5, 2018, 11:35 p.m.
Authors: Tian Gan · Tseganeh Z. Gichamo

ABSTRACT:

This is the model simulation of snow water equivalent in Logan River watershed from 2008 to 2009. The model used is the Utah Energy Balance model which is a snowmelt model. The simulation result is used as the input data for SAC-SMA model to simulate the stream flow of the watershed. asdfasd

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Collection Resource Collection Resource

ABSTRACT:

This resource collects all the data and code to reproduce the hydrologic modeling research, which coupled Utah Energy Balance (UEB) snowmelt model with the Sacramento Soil Moisture Accounting (SAC-SMA) run-off model to simulate the basin snowmelt process and discharge for the Dolores River watershed. This research is aimed to evaluate the UEB model performance using the Daymet input for water supply forecast in the study watershed. It is also aimed to demonstrate how to use different web based apps and software to support reproducible hydrologic modeling research.

This resource collects 3 resources:
resource 1: includes the model input/output files for UEB model simulation which was created using the UEB web application.
resource 2: includes the Sciunit object to help reproduce rain plus melt input processing (based on UEB model output) and SAC-SMA model simulation process.
resource 3: includes the observational data, model output files, and python analysis code for model results analysis.

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Composite Resource Composite Resource

ABSTRACT:

This resource stores the Sciunit object to help repeat the model input preparation and model execution for basin discharge simulation in Dolores River watershed using the Sacramento Soil Moisture Accounting (SAC-SMA) runoff model. The rain plus melt input for SAC-SMA model was created from the Utah Energy Balance snowmelt model output.

This Sciunit object is a container that enables reproduction of the modeling process without software installation. The Jupyter Notebook app in HydroShare can help execute the Sciunit object.

Show More
Composite Resource Composite Resource

ABSTRACT:

This resource includes the simulation and observation discharge data and corresponding data analysis code for Dolores River watershed. The observation data is from USGS gage station. The basin discharge simulation was created by coupling Utah Energy Balance snowmelt model and Sacramento Soil Moisture Accounting (SAC-SMA) runoff model.
This resource is aimed to demonstrate how to use the Jupyter Notebook to repeat the data analysis process. To test please use the link to access the app (https://jupyter.cuahsi.org/hub/login)

Show More
Model Instance Resource Model Instance Resource

ABSTRACT:

This resource was created using the HydroShare UEB model input preparation web application (UEB web app) that utilizes the HydroDS modeling web services. The model input data files include: watershed.nc, aspect.nc, slope.nc, cc.nc, hcan.nc, lai.nc, vp0.nc, tmin0.nc, tmax0.nc, srad0.nc, prcp0.nc, ueb_setup.py, hydrogate.py. The model parameter files include: control.dat, param.dat, siteinitial.dat, inputcontrol.dat, outputcontrol.dat. This model instance resource is complete for model simulation. The corresponding model output is also included in the resource. Use a HydroShare user account and the link to access the UEB web app (https://appsdev.hydroshare.org/apps/ueb-app/) to run and reproduce this model instance.

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Collection Resource Collection Resource
Earth Cube 2019 Annual Meeting Snowmelt Modeling Use Case
Created: May 30, 2019, 8:33 p.m.
Authors: Tian Gan

ABSTRACT:

This resource collects all the data and code to illustrate reproducibility of hydrologic modeling research, which coupled Utah Energy Balance (UEB) snowmelt model with the Sacramento Soil Moisture Accounting (SAC-SMA) run-off model as part of the National Weather Service Research Distributed Hydrologic Modeling Framework to simulate the basin snowmelt process and discharge for the Dolores River watershed. This research is aimed to evaluate the Utah Energy Balance (UEB) model performance using Daymet input for water supply forecast in the study watershed. It is also aimed to demonstrate how to use different web based apps and software to support reproducible hydrologic modeling research.

Show More
Composite Resource Composite Resource

ABSTRACT:

This resource stores the Sciunit object to help repeat the model input preparation and model execution for basin discharge simulation in Dolores River watershed using the Sacramento Soil Moisture Accounting (SAC-SMA) runoff model. The rain plus melt input for SAC-SMA model was created from the Utah Energy Balance snowmelt model output (https://www.hydroshare.org/resource/8f9320123baa4ef1b4a304f0ce20ab08/)

This Sciunit object is a container that enables reproduction of the modeling process without software installation. The JupyterHub web app in HydroShare can help execute the Sciunit object.

In this resource, there are 2 Sciunit objects:
earthcube_use_case.zip: a Sciunit object which supports SAC-SMA model simulation for a water year
use_case.zip: a demo Sciunit object which supports SAC-SMA model simulation for 1 month

Show More
Composite Resource Composite Resource

ABSTRACT:

This resource includes the simulation and observation discharge data and corresponding data analysis code for Dolores River watershed. The observation data is from USGS gage station. The basin discharge simulation was created by coupling Utah Energy Balance snowmelt model and Sacramento Soil Moisture Accounting (SAC-SMA) runoff model.
This resource is aimed to demonstrate how to use the Jupyter Notebook to repeat the data analysis process. To test please use the link to access the app (https://jupyter.cuahsi.org/hub/login)

Show More
Composite Resource Composite Resource
Data analysis of snow water equivalent for test watershed
Created: Aug. 9, 2019, 8:39 p.m.
Authors: Tian Gan

ABSTRACT:

This resource includes the data analysis code and results using a subset of the model simulation of snow water equivalent for the watershed of Dolores River above McPhee reservoir in Colorado River Basin from 1988 to 2010. The model used is the Utah Energy Balance model which is a physically based snow melt model.

The data analysis code used NetCDF Operator commands (http://nco.sourceforge.net). It first subsets the data from January 1st to May 30th, 2009 to identify the maximum snow water equivalent for each grid cell within this period and write the result to a new NetCDF file (max.nc). It then retrieves the data for April 1st and April 15th (april_1.nc, april_15.nc) and evaluates the snow water equivalent difference between the two dates to create a new NetCDF file (diff.nc). This provides the analysis result for accumulation (increase) or ablation (decrease) during this period. Water managers often track such snow water equivalent changes in water supply forecasts

Show More
Composite Resource Composite Resource

ABSTRACT:

This resource includes the data analysis code and results using a subset of the model simulation of snow water equivalent for the watershed of Dolores River above McPhee reservoir in the Colorado River Basin from 1988 to 2010. The model used is the Utah Energy Balance model which is a physically based snow melt model.

The data analysis code used NetCDF Operator commands (http://nco.sourceforge.net). It first subsets the data from January to May, 2009 to identify the maximum snow water equivalent for each grid cell within this period and write the result to a new NetCDF file (max.nc). It then subsets the data for April 1st and 15th, 2009 (april_1.nc, april_15.nc) and evaluates the snow water equivalent difference between the two dates to create a new NetCDF file (diff.nc). This provides the analysis result for accumulation (increase) or ablation (decrease) during this period. Water managers often track such snow water equivalent changes in water supply forecasts

Show More