Journal article

Publication year: 2014

Pages: 212-228

Journal: Sensors

Volume number: 14

Issue number: 1

ISSN: 1424-8220

Open access status: Gold

DOI Link: https://doi.org/10.3390/s140100212

Publisher: MDPI

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 (delta H-2 and delta O-18), 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 Banos, 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 results for the isotopic composition of different water sources and nitrate values from the 2012 dry season.

Harvard Citation style: Heinz, E., Kraft, P., Buchen, C., Frede, H., Aquino, E. and Breuer, L. (2014) Set Up of an Automatic Water Quality Sampling System in Irrigation Agriculture, Sensors, 14(1), pp. 212-228. https://doi.org/10.3390/s140100212

APA Citation style: Heinz, E., Kraft, P., Buchen, C., Frede, H., Aquino, E., & Breuer, L. (2014). Set Up of an Automatic Water Quality Sampling System in Irrigation Agriculture. Sensors. 14(1), 212-228. https://doi.org/10.3390/s140100212