Presentation by Niels Drost ( eScience Center) at the OpenDA User Day, during Delft Software Days 2016. Tuesday 1 November 2016, Delft.

1. The eWaterCycle Project
An operational global
Hydrological forecasting system
based on standards and open
source software
Niels Drost, Marc Bierkens, Nick van de
Giesen, Rolf Hut, Maarten van
Meersbergen, Edwin Sutanudjaja
and
Stef Hummel, Martin Verlaan, Arno
Kockx

5. Mon Tue Wed Thu

6. eWaterCycle: Global
Hydrological Forecast System
• Global @ 10Km resolution
• GFS Ensemble Forcing
• H-SAF Soil moisture observations
• Experimental (Demo) Service
• Basis for Science

7. NetCDFNetCDF
NetCDFNetCDF
WMSWMS
NetCDFNetCDF
ncWMSncWMS
BMI - PythonBMI - Python
ThriftThrift
BMI - JavaBMI - Java

9. PCRGlob-WB
• PCRaster GLobal Water Balance 2.0
• global hydrology & water resources
model
• 5 arc-min (~10 km) (and increasing)
• Implemented in Python using
PCRaster(GPL)

10. Cesium and ncWMS / EDAL
●
Cesium:
Javasript 3D
Globe library
●
NcWMS / EDAL:
NetCDF WMS
server

11. Cylc

12. Cylc

13. NetCDFNetCDF
NetCDFNetCDF
WMSWMS
NetCDFNetCDF
ncWMSncWMS
BMI - PythonBMI - Python
ThriftThrift
BMI - JavaBMI - Java

14. OpenDA
●
GFS Ensemble used as input for
PCRGlobWB model ensemble
●
Created “Generic” OpenDA Model
based on BMI
●
Sequential Ensemble Kalman
Filter

15. Basic Model Interface (BMI)
From CSDMS project
• void initialize (string config_file)
void update (double dt)
void finalize ()
get_value (string var_name)
set_value (string var_name)
+grid + time + units info
+not much else
Source Code: https://github.com/bmi-forum
Python, Fortran, C, Java, etc…

16. Thrift
●
Remote Procedure Call(RPC)
model
●
Web Based (Facebook)
●
Define API, auto-generate
client/server code for Java, C, C+
+, Python, etc.

17. OpenDA Stack
PCRGlobWB
BMI - Python
BMI - Java
Thrift
BMI Model
OpenDA
Scaler

18. Observations
Original
●
HSAF soil moisture: 400K cells
●
PCRGlobWB: 9M cells
Scaled, filtered:
●
HSAF: 50K observations
●
PCRGlobWB: 300K

19. eWaterCycle: An opensource
global hydrological forecasting
system.

20. forecast.ewatercycle.org
github.com/ewatercycle
www.esciencecenter.nl
Environmental Computing @ EGU 2017
ESSI 3.1