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Dear SPHY model user,

I am happy to see that you are using or planning to use the Spatial Processes in HYdrology (SPHY) model. The most recent SPHY model release is version 2.2.1, which has been released on the 26th of May 2019.

SPHY has been developed with the explicit aim of simulating terrestrial hydrology on flexible scales, under various physiographical and hydroclimatic conditions. SPHY is a spatially distributed leacky bucket type of model, and solves the soil-water and cryosphere processes on a cell-by-cell basis. It is written in the Python Programming language using the PCRaster Dynamic Modeling Framework.

Reference documentation for the SPHY model can be found here: https://sphy.readthedocs.io/en/latest/

Correspondence for the SPHY model: sphymodel@gmail.com

The model concepts are well-described in Terink et al. (2015). The model, including it's QGIS plugins, can be downloaded from my GitHub repository. Official releases can be found here.

I encourage you to post Questions and Answers related to the source code, available plugins, input and output formats, calibration, applications, and suggestions for improvements.

Best Regards,

Wilco Terink

0 selected

Oct 14

regarding snowmelt less than glacier melt

Dear user, I am using SPHY2 for snow and glacier melt runoff over parvati basin,western himalaya. I

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regarding snowmelt less than glacier melt

Dear user, I am using SPHY2 for snow and glacier melt runoff over parvati basin,western himalaya. I

Oct 14

Shahanshah Abbas

Sep 6

Meteorological_Using-CSV-Files

Hello Everyone. I am trying to create meteorological forcing using CSV files (observed Data) for

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Meteorological_Using-CSV-Files

Hello Everyone. I am trying to create meteorological forcing using CSV files (observed Data) for

Sep 6

Shahanshah Abbas

Aug 26

SPHY version 3.0 ice thickness Raster

Hello everyone, I am working on SPHY Model (3.0) using QGIS 3.1 plugin on 3 mighty river basins of

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SPHY version 3.0 ice thickness Raster

Hello everyone, I am working on SPHY Model (3.0) using QGIS 3.1 plugin on 3 mighty river basins of

Aug 26

Shourov IWFM, Paul Sandoval2

Aug 13

forcing file from netcdf

Hi, Here is a code I created to generate the forcing files from a netcdf. I hope it helps you. https:

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forcing file from netcdf

Hi, Here is a code I created to generate the forcing files from a netcdf. I hope it helps you. https:

Aug 13

anu somisetty, 姚前2

Jul 29

Python based pre-processing

Hello, I'm also learning about the Sphy model. My guess is that this issue stems from only

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Python based pre-processing

Hello, I'm also learning about the Sphy model. My guess is that this issue stems from only

Jul 29

Garima Acharya, WilcoTerink2

Jul 2

Usage of SPHY v3 vs v2.2

Hi, There is no version 3, at least not one that i support. I therefore recommend to stick to version

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Usage of SPHY v3 vs v2.2

Hi, There is no version 3, at least not one that i support. I therefore recommend to stick to version

Jul 2

RAJEEV RANJAN, WilcoTerink2

Jun 25

Regarding very less Baseflow discharge

Is it just base flow or is the total runoff also low? What's your model bias, ie, Qsim/ Qobs?

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Regarding very less Baseflow discharge

Is it just base flow or is the total runoff also low? What's your model bias, ie, Qsim/ Qobs?

Jun 25

Apr 21

Guidance regarding estimation of lateral flow in watershed

The model has been run successfully. I used the routing and groundwater modules and obtained results

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Guidance regarding estimation of lateral flow in watershed

The model has been run successfully. I used the routing and groundwater modules and obtained results

Apr 21

Mar 16

Inquiry Regarding Snow Sublimation Parameterization in SPHY Model

Hi. I recently read a paper, "Variable 21st Century Climate Change Response for Rivers in High

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Inquiry Regarding Snow Sublimation Parameterization in SPHY Model

Hi. I recently read a paper, "Variable 21st Century Climate Change Response for Rivers in High

Mar 16

Mar 8

Heartfelt Thanks for Your Support with the SPHY Model

Dear SPHY Development Team, I hope this message finds you well. I am a student currently using the

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Heartfelt Thanks for Your Support with the SPHY Model

Dear SPHY Development Team, I hope this message finds you well. I am a student currently using the

Mar 8

Paul Sandoval, … Sai Krishna9

Feb 12

GlacierTable SPHYv2.2.1

I have created glacier table using procedure provided in sphy ver3 model guide(https://futurewater.

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GlacierTable SPHYv2.2.1

I have created glacier table using procedure provided in sphy ver3 model guide(https://futurewater.

Feb 12

薇叶, WilcoTerink3

Feb 6

No Glacier runoff data

Thank you so much for your reply!!The following pictures are my glacier module parameters settings

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No Glacier runoff data

Thank you so much for your reply!!The following pictures are my glacier module parameters settings

Feb 6

WilcoTerink, Sai Krishna3

Jan 27

Re: SPHY-2.2.1 results

Your kc table should be numbered from 1 to the number of classes present in your land use map. So if

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Re: SPHY-2.2.1 results

Your kc table should be numbered from 1 to the number of classes present in your land use map. So if

Jan 27

yi gu, Tejal Shirsat2

Jan 23

Request for SPHY 2.0 Hydrological Model Case Study Data

Hi Yi, Thanks for raising your concern here. I had the same issue since a couple of months ago where

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Request for SPHY 2.0 Hydrological Model Case Study Data

Hi Yi, Thanks for raising your concern here. I had the same issue since a couple of months ago where

Jan 23

sanjay kumar dwivedi, … yi gu3

Jan 15

Error in creating precipitation forcing from daily GPM-imerge precipitation Netcdf4

I am also facing the same issue. if someone has found the fix for this, then please help. Thank 在2025

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Error in creating precipitation forcing from daily GPM-imerge precipitation Netcdf4

I am also facing the same issue. if someone has found the fix for this, then please help. Thank 在2025

Jan 15

12/11/24

Regarding the use of QGIS plugins to import Prcp.nc, Tair.nc, Tmax.nc, and Tmin.nc data

Hello everyone, I am using ERA5_land precipitation and temperature data as inputs for my model. After

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Regarding the use of QGIS plugins to import Prcp.nc, Tair.nc, Tmax.nc, and Tmin.nc data

Hello everyone, I am using ERA5_land precipitation and temperature data as inputs for my model. After

12/11/24

Yogesh Yadav, WilcoTerink2

11/22/24

Guidance regarding Incorporate Multiple LULC Maps for Decadal Change and Discharge Response in SPHY Model

Hi, To evaluate the effect of land use changes only, you'd need to isolate the other processes

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Guidance regarding Incorporate Multiple LULC Maps for Decadal Change and Discharge Response in SPHY Model

Hi, To evaluate the effect of land use changes only, you'd need to isolate the other processes

11/22/24

Sai Krishna, WilcoTerink8

10/2/24

problem creating PCraster location map required for reporting time-series of the various model fluxe

A correction to above step on converting point layer to PCraster Need to set datatype as Nominal

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problem creating PCraster location map required for reporting time-series of the various model fluxe

A correction to above step on converting point layer to PCraster Need to set datatype as Nominal

10/2/24

9/4/24

Operational issues about the SPHY v3.0 model

Hello, main.py does not exist in SPHY v3.0 released on the official website. Does SPHY v3.0 have to

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Operational issues about the SPHY v3.0 model

Hello, main.py does not exist in SPHY v3.0 released on the official website. Does SPHY v3.0 have to

9/4/24

9/2/24

lake module input

Dear all, I am using the SPHY model to simulate the contribution of various runoff components to

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lake module input

Dear all, I am using the SPHY model to simulate the contribution of various runoff components to

9/2/24

Paul Sandoval, … WilcoTerink9

8/31/24

SPHYv2.2.1 and PCRaster installation

I see you managed to get it installed later on, which is great. Just some additional info: PCRaster

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SPHYv2.2.1 and PCRaster installation

I see you managed to get it installed later on, which is great. Just some additional info: PCRaster

8/31/24

Surabjeet Singh

8/31/24

Request for Assistance with SPHY Model Issue

Dear all, I hope you are doing well. I'm currently encountering an error while trying to generate

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Request for Assistance with SPHY Model Issue

Dear all, I hope you are doing well. I'm currently encountering an error while trying to generate

8/31/24

Manas Barve, WilcoTerink2

7/19/24

Suggestions for removing excess water from the system

All processes are driven by precipitation, so that's one of the key inputs that can lead to model

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Suggestions for removing excess water from the system

All processes are driven by precipitation, so that's one of the key inputs that can lead to model

7/19/24

Manas Barve, WilcoTerink3

7/19/24

Suggestion for validation

Re your second question: fractional maps are always averages. So are temperature maps and other maps

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Suggestion for validation

Re your second question: fractional maps are always averages. So are temperature maps and other maps

7/19/24

6/27/24

snow cover output

Hello everyone, I have added code in SPHY model to output snow cover maps, then comparing them with

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snow cover output

Hello everyone, I have added code in SPHY model to output snow cover maps, then comparing them with

6/27/24

pradeep s, WilcoTerink3

6/14/24

Error while running SPHY v2.2.1

Hi Wilco, Thank you for the response. I found out the cause for the error. There was a mistake in the

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Error while running SPHY v2.2.1

Hi Wilco, Thank you for the response. I found out the cause for the error. There was a mistake in the

6/14/24

uday kumar, … WilcoTerink5

6/14/24

Error while creating Meteorological Forcing file

My guess is that you are trying to run it for a longer period than the data that is available in the

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Error while creating Meteorological Forcing file

My guess is that you are trying to run it for a longer period than the data that is available in the

6/14/24

Lin Yang, WilcoTerink2

6/14/24

AssertionError when predicting runoff in the future

Hi, Unfortunately I cannot help you with this question. The reason is that I do not support this

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AssertionError when predicting runoff in the future

Hi, Unfortunately I cannot help you with this question. The reason is that I do not support this

6/14/24

yan luo, WilcoTerink2

6/14/24

SPHY model output

Hi, This tutorial is old and so are the plugins. Therefore, I do not support this anymore. However, I

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SPHY model output

Hi, This tutorial is old and so are the plugins. Therefore, I do not support this anymore. However, I

6/14/24

Manas Barve, WilcoTerink3

5/14/24

Difficulty Generating Maps with SPHY Model

Hello Wilco, Thank you for the information provided. I've been following the document you shared.

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Difficulty Generating Maps with SPHY Model

Hello Wilco, Thank you for the information provided. I've been following the document you shared.

5/14/24

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