caa a22 4500 445837861 CHVBK 20180317145335.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00271-010-0249-x doi (NATIONALLICENCE)springer-10.1007/s00271-010-0249-x Wireless lysimeters for real-time online soil water monitoring [Elektronische Daten] [Y. Kim, J. Jabro, R. Evans] Identification of drainage water allows assessing the effectiveness of water management. Passive capillary wick-type lysimeters (PCAPs) were used to monitor water flux leached below the root zone under an irrigated cropping system. Wireless lysimeters were developed for web-based real-time online monitoring of drainage water using a distributed wireless sensor network (WSN). Twelve PCAP sensing stations were installed across the field at 90cm below the soil surface, and each station measured the amount of drainage water using two tipping buckets mounted in the lysimeter and continually monitored soil water contents using two soil moisture sensors installed above the lysimeter. A weather station was included in the WSN to measure micrometeorological field conditions. All in-field sensory data were periodically sampled and wirelessly transmitted to a base station that was bridged to a web server for broadcasting the data on the internet. Communication signals from the in-field sensing stations to the base station were successfully interfaced using low-cost Bluetooth wireless radio communication. Field experiments resulted in high correlation between estimated and actual drainage with r 2=0.95 and confirmed a reliable wireless communication throughout the growing season. A web-linked WSN system provided convenient remote online access to monitor drainage water flux and field conditions without the need for costly time-consuming supportive operations. Springer-Verlag (outside the USA), 2010 Kim Y. Electrical and Computer Engineering, Purdue University, 465 Northwestern Avenue, 47907-2035, West Lafayette, IN, USA aut Jabro J. Northern Plains Agricultural Research Laboratory, USDA-ARS, 1500 North Central Avenue, 59270, Sidney, MT, USA aut Evans R. Northern Plains Agricultural Research Laboratory, USDA-ARS, 1500 North Central Avenue, 59270, Sidney, MT, USA aut Irrigation Science Springer-Verlag 29/5(2011-09-01), 423-430 0342-7188 29:5<423 2011 29 271 https://doi.org/10.1007/s00271-010-0249-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00271-010-0249-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim Y. Electrical and Computer Engineering, Purdue University, 465 Northwestern Avenue, 47907-2035, West Lafayette, IN, USA aut NATIONALLICENCE 700 1- Jabro J. Northern Plains Agricultural Research Laboratory, USDA-ARS, 1500 North Central Avenue, 59270, Sidney, MT, USA aut NATIONALLICENCE 700 1- Evans R. Northern Plains Agricultural Research Laboratory, USDA-ARS, 1500 North Central Avenue, 59270, Sidney, MT, USA aut NATIONALLICENCE 773 0- Irrigation Science Springer-Verlag 29/5(2011-09-01), 423-430 0342-7188 29:5<423 2011 29 271 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer