Set up of an automatic water quality sampling system in irrigation agriculture

Sensors
Emanuel HeinzLutz Breuer

Abstract

We have developed a high-resolution automatic sampling system for continuous in situ measurements of stable water isotopic composition and nitrogen solutes along with hydrological information. The system facilitates concurrent monitoring of a large number of water and nutrient fluxes (ground, surface, irrigation and rain water) in irrigated agriculture. For this purpose we couple an automatic sampling system with a Wavelength-Scanned Cavity Ring Down Spectrometry System (WS-CRDS) for stable water isotope analysis (δ2H and δ18O), a reagentless hyperspectral UV photometer (ProPS) for monitoring nitrate content and various water level sensors for hydrometric information. The automatic sampling system consists of different sampling stations equipped with pumps, a switch cabinet for valve and pump control and a computer operating the system. The complete system is operated via internet-based control software, allowing supervision from nearly anywhere. The system is currently set up at the International Rice Research Institute (Los Baños, The Philippines) in a diversified rice growing system to continuously monitor water and nutrient fluxes. Here we present the system's technical set-up and provide initial proof-of-concept with resul...Continue Reading

References

Jan 19, 2010·Journal of Environmental Monitoring : JEM·Ulrike Bende-Michl, Peter B Hairsine
Jan 11, 2011·Analytical Chemistry·Geoff Koehler, Leonard I Wassenaar
May 1, 2013·The Science of the Total Environment·Richard C SandfordPaul J Worsfold

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Citations

Mar 23, 2017·Environmental Technology·Setia BudiPaul Turner

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Software Mentioned

SQLite
WS
pymodbus
matplotlib
PicAdam
Python
MODBUS
CRDS

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