%0 Journal Article
%T Set Up of an Automatic Water Quality Sampling System in Irrigation Agriculture
%A Emanuel Heinz
%A Philipp Kraft
%A Caroline Buchen
%A Hans-Georg Frede
%A Eugenio Aquino
%A Lutz Breuer
%J Sensors
%D 2014
%I MDPI AG
%R 10.3390/s140100212
%X 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 (¦Ä 2H and ¦Ä 18O), 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 Ba£¿os, 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.
%K automatic water quality sampling system
%K rice paddy
%K nitrate
%K stable water isotopes
%U http://www.mdpi.com/1424-8220/14/1/212