Set Up of an Automatic Water Quality Sampling System in Irrigation Agriculture

Sensors

Emanuel Heinz³  Philipp Kraft³  Caroline Buchen¹  Hans-Georg Frede³  Eugenio Aquino² 

[1] International Rice Research Institute, Los Baños 4030, The Philippines; E-Mail:;Institute for Landscape Ecology and Resources Management, Research Centre for BioSystems, Land Use and Nutrition (IFZ), University Giessen, Heinrich-Buff-Ring 26, Giessen 35392, Germany; E-Mails:

关键词: automatic water quality sampling system;    rice paddy;    nitrate;    stable water isotopes;   

DOI  :  10.3390/s140100212

来源: mdpi

【 摘 要 】

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 results for the isotopic composition of different water sources and nitrate values from the 2012 dry season.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.