{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T07:12:47Z","timestamp":1768461167162,"version":"3.49.0"},"reference-count":100,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2017,3,20]],"date-time":"2017-03-20T00:00:00Z","timestamp":1489968000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000930","name":"NSF","doi-asserted-by":"publisher","award":["CNS-1320132"],"award-info":[{"award-number":["CNS-1320132"]}],"id":[{"id":"10.13039\/501100000930","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000930","name":"NSF","doi-asserted-by":"publisher","award":["CNS-1319331"],"award-info":[{"award-number":["CNS-1319331"]}],"id":[{"id":"10.13039\/501100000930","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This study presents the latest updates to the Audubon Society of Western Pennsylvania (ASWP) testbed, a $50,000 USD, 104-node outdoor multi-hop wireless sensor network (WSN). The network collects environmental data from over 240 sensors, including the EC-5, MPS-1 and MPS-2 soil moisture and soil water potential sensors and self-made sap flow sensors, across a heterogeneous deployment comprised of MICAz, IRIS and TelosB wireless motes. A low-cost sensor board and software driver was developed for communicating with the analog and digital sensors. Innovative techniques (e.g., balanced energy efficient routing and heterogeneous over-the-air mote reprogramming) maintained high success rates (&gt;96%) and enabled effective software updating, throughout the large-scale heterogeneous WSN. The edaphic properties monitored by the network showed strong agreement with data logger measurements and were fitted to pedotransfer functions for estimating local soil hydraulic properties. Furthermore, sap flow measurements, scaled to tree stand transpiration, were found to be at or below potential evapotranspiration estimates. While outdoor WSNs still present numerous challenges, the ASWP testbed proves to be an effective and (relatively) low-cost environmental monitoring solution and represents a step towards developing a platform for monitoring and quantifying statistically relevant environmental parameters from large-scale network deployments.<\/jats:p>","DOI":"10.3390\/s17030636","type":"journal-article","created":{"date-parts":[[2017,3,20]],"date-time":"2017-03-20T11:39:09Z","timestamp":1490009949000},"page":"636","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["A Networked Sensor System for the Analysis of Plot-Scale Hydrology"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6808-6558","authenticated-orcid":false,"given":"German","family":"Villalba","sequence":"first","affiliation":[{"name":"Department of Civil and Environmental Engineering, University of Pittsburgh, 3700 O\u2019Hara Street, 728 Benedum Engineering Hall, Pittsburgh, PA 15261, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernando","family":"Plaza","sequence":"additional","affiliation":[{"name":"Department of Civil and Environmental Engineering, University of Pittsburgh, 3700 O\u2019Hara Street, 728 Benedum Engineering Hall, Pittsburgh, PA 15261, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoyang","family":"Zhong","sequence":"additional","affiliation":[{"name":"Department of Computer and Information Science, Indiana University Purdue University, 723 West Michigan Street, SL 280, Indianapolis, IN 46202, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4312-919X","authenticated-orcid":false,"given":"Tyler","family":"Davis","sequence":"additional","affiliation":[{"name":"Department of Civil and Environmental Engineering, University of Pittsburgh, 3700 O\u2019Hara Street, 728 Benedum Engineering Hall, Pittsburgh, PA 15261, USA"},{"name":"Currently at USDA-ARS, Robert W. Holley Center for Agriculture and Health, 538 Tower Road, Ithaca, NY 14853, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Miguel","family":"Navarro","sequence":"additional","affiliation":[{"name":"Department of Computer and Information Science, Indiana University Purdue University, 723 West Michigan Street, SL 280, Indianapolis, IN 46202, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yimei","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Computer and Information Science, Indiana University Purdue University, 723 West Michigan Street, SL 280, Indianapolis, IN 46202, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thomas","family":"Slater","sequence":"additional","affiliation":[{"name":"Department of Civil and Environmental Engineering, University of Pittsburgh, 3700 O\u2019Hara Street, 728 Benedum Engineering Hall, Pittsburgh, PA 15261, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yao","family":"Liang","sequence":"additional","affiliation":[{"name":"Department of Computer and Information Science, Indiana University Purdue University, 723 West Michigan Street, SL 280, Indianapolis, IN 46202, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xu","family":"Liang","sequence":"additional","affiliation":[{"name":"Department of Civil and Environmental Engineering, University of Pittsburgh, 3700 O\u2019Hara Street, 728 Benedum Engineering Hall, Pittsburgh, PA 15261, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2017,3,20]]},"reference":[{"key":"ref_1","unstructured":"Holland, M.H., Blood, E.R., and Shaffer, L.R. (2003). Achieving Sustainable Freshwater Systems: A Web of Connections, Island Press."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"157","DOI":"10.1016\/0022-1694(89)90101-7","article-title":"Changing ideas in hydrology\u2014The case of physically-based models","volume":"105","author":"Beven","year":"1989","journal-title":"J. Hydrol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1051\/forest:19980112","article-title":"Scaling xylem sap flux and soil water balance and calculating variance: A method for partitioning water flux in forests","volume":"55","author":"Oren","year":"1998","journal-title":"Ann. For. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"176","DOI":"10.1016\/j.agrformet.2007.04.010","article-title":"A comparison of sap flux-based evapotranspiration estimates with catchment-scale water balance","volume":"145","author":"Ford","year":"2007","journal-title":"Agric. For. Meteorol."},{"key":"ref_5","first-page":"W01423","article-title":"Field observations of soil moisture variability across scales","volume":"44","author":"Famiglietti","year":"2008","journal-title":"Water Resour. Res."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"393","DOI":"10.1016\/S1389-1286(01)00302-4","article-title":"Wireless sensor networks: A survey","volume":"38","author":"Akyildiz","year":"2002","journal-title":"Comput. Netw."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/s11227-013-1021-9","article-title":"Wireless sensor networks: A survey on recent developments and potential synergies","volume":"68","author":"Rawat","year":"2014","journal-title":"J. Supercomput."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Juang, P., Oki, H., Wang, Y., Martonosi, M., Peh, L.-S., and Rubenstein, D. (2002, January 5\u20139). Energy-efficient computing for wildlife tracking: Design tradeoffs and early experiences with ZebraNet. Proceedings of the 10th International Conference on Architectural Support for Programming Languages and Operating Systems, San Jose, CA, USA.","DOI":"10.1145\/605397.605408"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Mainwaring, A., Culler, D., Polastre, J., Szewczyk, R., and Anderson, J. (2002, January 28). Wireless sensor networks for habitat monitoring. Proceedings of the 1st ACM International Workshop on Wireless Sensor Networks and Applications, Atlanta, GA, USA.","DOI":"10.1145\/570738.570751"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Szewczyk, R., Polastre, J., Mainwaring, A., and Culler, D. (2004, January 19\u201321). Lessons from a sensor network expedition. Proceedings of the 1st European Workshop on Wireless Sensor Networks, Berlin, Germany.","DOI":"10.1007\/978-3-540-24606-0_21"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Tolle, A., Polastre, J., Szewczyk, R., Culler, D., Turner, N., Tu, K., Burgess, S., Dawson, T., Buonadonna, P., and Gay, D. (2005, January 2\u20134). A macroscope in the redwoods. Proceedings of the 3rd International Conference on Embedded Networked Sensor Systems, San Diego, CA, USA.","DOI":"10.1145\/1098918.1098925"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"192","DOI":"10.1089\/ees.2006.0045","article-title":"New approaches in embedded networked sensing for terrestrial ecological observatories","volume":"24","author":"Hamilton","year":"2007","journal-title":"Environ. Eng. Sci."},{"key":"ref_13","unstructured":"Werner-Allen, G., Johnson, J., Ruiz, M., Lees, J., and Welsh, M. (2005, January 2). Monitoring volcanic eruptions with a wireless sensor network. Proceedings of the Second European Workshop on Wireless Sensor Networks, Istanbul, Turkey."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"18","DOI":"10.1109\/MIC.2006.26","article-title":"Deploying a wireless sensor network on an active volcano","volume":"10","author":"Lorincz","year":"2006","journal-title":"IEEE Internet Comput."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Selavo, L., Wood, A., Cao, Q., Sookoor, T., Liu, H., Srinivasan, A., Wu, Y., Kang, W., Stankovic, J., and Young, D. (2007, January 6\u20139). LUSTER: Wireless sensor network for environmental research. Proceedings of the 5th International Conference on Embedded Networked Sensor Systems, Sydney, Australia.","DOI":"10.1145\/1322263.1322274"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1162\/itid.2007.4.1.51","article-title":"Commonsense net: A wireless sensor network for resource-poor agriculture in the semiarid areas of developing countries","volume":"4","author":"Panchard","year":"2007","journal-title":"Inf. Technol. Int. Dev."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1109\/MPRV.2007.47","article-title":"Transforming Agriculture through Pervasive Wireless Sensor Networks","volume":"6","author":"Wark","year":"2007","journal-title":"IEEE Pervasive Comput."},{"key":"ref_18","unstructured":"Li, X., Deng, Y., and Ding, L. (2008, January 20\u201323). Study on precision agriculture monitoring framework based on WSN. Proceedings of the 2nd International Conference on Anti-Counterfeiting, Security and Identification, Guiyang, China."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Martinelli, M., Ioriatti, L., Viani, F., Benedetti, M., and Massa, A. (2009, January 12\u201317). A WSN-based solution for precision farm purposes. Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, Cape Town, South Africa.","DOI":"10.1109\/IGARSS.2009.5417630"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"280","DOI":"10.1007\/s11119-010-9178-1","article-title":"Design and validation of a wireless sensor network architecture for precision horticulture applications","volume":"12","author":"Soto","year":"2011","journal-title":"Precis. Agric."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"2186","DOI":"10.1002\/mop.30000","article-title":"Experimental Validation of a wireless system for the irrigation management in smart farming applications","volume":"58","author":"Viani","year":"2016","journal-title":"Microw. Opt. Technol. Lett."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Ferr\u00e1ndez-Pastor, F.J., Garcia-Chamizo, J.M., Nieto-Hidalgo, M., Mora-Pascual, J., and Mora-Martinez, J. (2016). Developing Ubiquitous Sensor Network Platform Using Internet of Things: Application in Precision Agriculture. Sensors, 16.","DOI":"10.3390\/s16071141"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1109\/JSEN.2016.2622244","article-title":"Low-cost wireless system for agrochemical dosage reduction in precision farming","volume":"17","author":"Viani","year":"2017","journal-title":"IEEE Sens. J."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"3240","DOI":"10.3390\/s90503240","article-title":"Development of a Sensor Node for Precision Horticulture","volume":"9","author":"Soto","year":"2009","journal-title":"Sensors"},{"key":"ref_25","unstructured":"Mus\u0103loiu-E, R., Terzis, A., Szlavecz, K., Szalay, A., Cogan, J., and Gray, J. (2006, January 30). Life under your feet: A wireless soil ecology sensor network. Proceedings of the 3rd Workshop on Embedded Networked Sensors, Cambridge, UK."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"287","DOI":"10.1016\/j.ecoinf.2006.02.008","article-title":"Ecoinformatics using wireless sensor networks: An overview","volume":"1","author":"Suri","year":"2006","journal-title":"Ecol. Inform."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"589","DOI":"10.1111\/j.1469-8137.2009.02811.x","article-title":"Environmental sensor networks in ecological research","volume":"182","author":"Rundel","year":"2009","journal-title":"New Phytol."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1016\/j.agrformet.2009.08.002","article-title":"Harnessing wireless sensor technologies to advance forest ecology and agricultural research","volume":"150","author":"Burgess","year":"2010","journal-title":"Agric. For. Meteorol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1029\/2008WR007046","article-title":"Viability of motes for hydrological measurement","volume":"45","author":"Trubilowicz","year":"2009","journal-title":"Water Resour. Res."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1145\/1689239.1689247","article-title":"SensorScope: Application-specific sensor network for environmental monitoring","volume":"6","author":"Ingelrest","year":"2010","journal-title":"ACM Trans. Sens. Netw."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Kerkez, B., Glaser, S.D., Bales, R.C., and Matthews, M.W. (2012). Design and performance of a wireless sensor network for catchment-scale snow and soil moisture measurements. Water Resour. Res., 48.","DOI":"10.1029\/2011WR011214"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"297","DOI":"10.3390\/jsan3040297","article-title":"Towards long-term multi-hop WSN deployments for environmental monitoring: An experimental network evaluation","volume":"4","author":"Navarro","year":"2014","journal-title":"J. Sens. Actuator Netw."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"426","DOI":"10.1016\/j.proenv.2013.06.049","article-title":"Wireless sensor network deployment for monitoring soil moisture dynamics at the field scale","volume":"19","author":"Majone","year":"2013","journal-title":"Procedia Environ. Sci."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Ryu, D., and Famiglietti, J.S. (2005). Characterization of footprint-scale surface soil moisture variability using Gaussian and beta distribution functions during the Southern Great Plains 1997 (SGP97) hydrology experiment. Water Resour. Res., 41.","DOI":"10.1029\/2004WR003835"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1002","DOI":"10.2136\/vzj2009.0173","article-title":"Potential of Wireless Sensor Networks for Measuring Soil Water Content Variability","volume":"9","author":"Bogena","year":"2010","journal-title":"Vadose Zone J."},{"key":"ref_36","unstructured":"TinyOS. Available online: http:\/\/tinyos.net\/."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1145\/2529988","article-title":"CTP: An efficient, robust, and reliable collection tree protocol for wireless sensor networks","volume":"10","author":"Gnawali","year":"2013","journal-title":"ACM Trans. Sens. Netw."},{"key":"ref_38","unstructured":"Navarro, M., and Liang, Y. (2016, January 15\u201317). Efficient and Balanced Routing in Energy-Constrained Wireless Sensor Networks for Data Collection. Proceedings of the 2016 International Conference on Embedded Wireless Systems and Networks (EWSN), Graz, Austria."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"954","DOI":"10.3390\/s120100954","article-title":"Sap Flow Sensors: Construction, Quality Control and Comparison","volume":"12","author":"Davis","year":"2012","journal-title":"Sensors"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1051\/forest:19850204","article-title":"Une nouvelle m\u00e9thode pour la mesure du flux de s\u00e8ve brute dans le tronc des arbres","volume":"42","author":"Granier","year":"1985","journal-title":"Ann. Sci. For."},{"key":"ref_41","first-page":"179","article-title":"Evaluation of transpiration in a Douglas fir stand by means of sap flow measurements","volume":"14","author":"Granier","year":"1987","journal-title":"Tree Physiol."},{"key":"ref_42","unstructured":"MPS-2 User Manual. Available online: http:\/\/manuals.decagon.com\/Manuals\/13755_MPS-2and6_Web.pdf."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1933","DOI":"10.1109\/JSEN.2011.2179933","article-title":"Analysis of Power Characteristics for Sap Flow, Soil Moisture, and Soil Water Potential Sensors in Wireless Sensor Networking Systems","volume":"12","author":"Davis","year":"2012","journal-title":"IEEE Sens. J."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"7069","DOI":"10.3390\/s90907069","article-title":"REMOTE, a wireless sensor network based system to monitor rowing performance","volume":"9","author":"Llosa","year":"2009","journal-title":"Sensors"},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Seto, E.Y., Giani, A., Shia, V., Wang, C., Yan, P., Yang, A.Y., Jerrett, M., and Bajcsy, R. (2009, January 8\u201310). A wireless body sensor network for the prevention and management of asthma. Proceedings of the IEEE International Symposium on Industrial Embedded Systems (SIES\u201909), Lausanne, Switzerland.","DOI":"10.1109\/SIES.2009.5196203"},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Kuryloski, P., Giani, A., Giannantonio, R., Gilani, K., Gravina, R., Seppa, V.P., Seto, E., Shia, V., Wang, C., and Yan, P. (2009, January 3\u20135). DexterNet: An open platform for heterogeneous body sensor networks and its applications. Proceedings of the IEEE Sixth International Workshop on Wearable and Implantable Body Sensor Networks (BSN 2009), Berkeley, CA, USA.","DOI":"10.1109\/BSN.2009.31"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"32","DOI":"10.1016\/j.jclepro.2013.06.041","article-title":"Integration of communication technologies in sensor networks to monitor the Amazon environment","volume":"59","author":"Cama","year":"2013","journal-title":"J. Clean. Prod."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"509","DOI":"10.3390\/jsan2030509","article-title":"Wireless sensor network operating system design rules based on real-world deployment survey","volume":"2","author":"Strazdins","year":"2013","journal-title":"J. Sens. Actuator Netw."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"2865","DOI":"10.1109\/JSEN.2016.2519924","article-title":"TinyOS-New Trends. Comparative Views, and Supported Sensing Applications: A Review","volume":"16","author":"Amjad","year":"2016","journal-title":"IEEE Sens. J."},{"key":"ref_50","unstructured":"Moss, D., and Levis, P. (2008). BoX-MACs: Exploiting Physical and Link Layer Boundaries in Low-Power Networking, Computer Systems Laboratory Stanford University."},{"key":"ref_51","unstructured":"Sensirion SHT11 Datasheet V5. Available online: https:\/\/www.sensirion.com\/fileadmin\/user_upload\/customers\/sensirion\/Dokumente\/2_Humidity_Sensors\/Sensirion_Humidity_Sensors_SHT1x_Datasheet_V5.pdf."},{"key":"ref_52","doi-asserted-by":"crossref","unstructured":"Zhong, X., Navarro, M., Villalba, G., Liang, X., and Liang, Y. (2014, January 27\u201330). MobileDeluge: Mobile Code Dissemination for Wireless Sensor Networks. Proceedings of the 2014 IEEE 11th International Conference on Mobile Ad Hoc and Sensor Systems, Philadelphia, PA, USA.","DOI":"10.1109\/MASS.2014.60"},{"key":"ref_53","doi-asserted-by":"crossref","unstructured":"Xu, Z., Hu, T., and Song, Q. (2017). Bulk Data Dissemination in Low Power Sensor Networks: Present and Future Directions. Sensors, 17.","DOI":"10.3390\/s17010156"},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"638","DOI":"10.2136\/sssaj2001.653638x","article-title":"Evaluation of Pedotransfer Functions for Predicting the Soil Moisture Retention Curve","volume":"65","author":"Cornelis","year":"2001","journal-title":"Soil Sci. Soc. Am. J."},{"key":"ref_55","unstructured":"Lin, H., Zhang, W., and Yu, H. (2014). Application of Soil Physics in Environmental Analyses, Springer."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"601","DOI":"10.1029\/WR014i004p00601","article-title":"Empirical equations for some soil hydraulic properties","volume":"14","author":"Clapp","year":"1978","journal-title":"Water Resour. Res."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"892","DOI":"10.2136\/sssaj1980.03615995004400050002x","article-title":"A closed-form equation for predicting the hydraulic conductivity of unsaturated soils","volume":"44","year":"1980","journal-title":"Soil Sci. Soc. Am. J."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1093\/treephys\/17.1.65","article-title":"A unified nomenclature for sap flow measurements","volume":"17","author":"Edwards","year":"1996","journal-title":"Tree Physiol."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1016\/0168-1923(95)02252-X","article-title":"Transpiration of natural rain forest and its dependence on climatic factors","volume":"78","author":"Granier","year":"1996","journal-title":"Agric. For. Meteorol."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"153","DOI":"10.1016\/S0168-1923(00)00199-4","article-title":"A comparison of methods for determining forest evapotranspiration and its components: Sap-flow, soil water budget, eddy covariance and catchment water balance","volume":"106","author":"Wilson","year":"2001","journal-title":"Agric. For. Meteorol."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"205","DOI":"10.1016\/S0378-1127(00)00518-1","article-title":"Transpiration from a multi-species deciduous forest as estimated by xylem sap flow techniques","volume":"143","author":"Wullschleger","year":"2001","journal-title":"For. Ecol. Manag."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"1267","DOI":"10.1016\/j.advwatres.2003.08.001","article-title":"Species differences in stomatal control of water loss at the canopy scale in a mature bottomland deciduous forest","volume":"26","author":"Pataki","year":"2003","journal-title":"Adv. Water Res."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1016\/j.foreco.2007.04.043","article-title":"Tree and stand transpiration in a Midwestern bur oak savanna after elm encroachment and restoration thinning","volume":"247","author":"Asbjornsen","year":"2007","journal-title":"For. Ecol. Manag."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1016\/j.agrformet.2005.11.007","article-title":"Effects of tree-to-tree and radial variations on sap flow estimates of transpiration in Japanese cedar","volume":"135","author":"Kumagai","year":"2005","journal-title":"Agric. For. Meteorol."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"559","DOI":"10.1093\/treephys\/15.9.559","article-title":"Relationships between stem diameter, sapwood area, leaf area, and transpiration in a young mountain ash forest","volume":"15","author":"Vertessy","year":"1995","journal-title":"Tree Physiol."},{"key":"ref_66","unstructured":"Davis, T. (2012). Environmental Monitoring Through Wireless Sensor Networks. [Ph.D. Thesis, University of Pittsburgh]."},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1109\/LGRS.2014.2326775","article-title":"Regression kriging-based upscaling of soil moisture measurements from a wireless sensor network and multiresource remote sensing information over heterogeneous cropland","volume":"12","author":"Kang","year":"2015","journal-title":"IEEE Lett. Geosci. Remote Sens."},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"RG2002","DOI":"10.1029\/2011RG000372","article-title":"Upscaling sparse ground-based soil moisture observations for the validation of coarse-resolution satellite soil moisture products","volume":"50","author":"Crow","year":"2012","journal-title":"Rev. Geophys."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1016\/j.jhydrol.2005.08.024","article-title":"Large scale measurements of soil moisture for validation of remotely sensed data: Georgia soil moisture experiment of 2003","volume":"323","author":"Bosch","year":"2006","journal-title":"J. Hydrol."},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"2604","DOI":"10.1002\/joc.3862","article-title":"Comparison and application of multiple methods for temporal interpolation of daily soil moisture","volume":"34","author":"Ford","year":"2014","journal-title":"Int. J. Climatol."},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"826","DOI":"10.1016\/j.mcm.2012.12.019","article-title":"Temporal and spatial variability of soil moisture based on WSN","volume":"58","author":"Zhang","year":"2013","journal-title":"Math. Comput. Model."},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"667","DOI":"10.1080\/13658816.2011.609488","article-title":"An improved distance metric for the interpolation of link-based traffic data using kriging: A case study of a large-scale urban road network","volume":"26","author":"Zou","year":"2012","journal-title":"Int. J. Geogr. Inf. Sci."},{"key":"ref_73","doi-asserted-by":"crossref","first-page":"619","DOI":"10.1002\/clen.201000528","article-title":"Spatial Variability of Surface Soil Moisture in a Depression Area of Karst Region","volume":"39","author":"Zhang","year":"2011","journal-title":"Clean Soil Air Water"},{"key":"ref_74","doi-asserted-by":"crossref","first-page":"723","DOI":"10.1080\/13658810903062487","article-title":"Using landscape characteristics to define an adjusted distance metric for improving kriging interpolations","volume":"24","author":"Lyon","year":"2010","journal-title":"Int. J. Geogr. Inf. Sci."},{"key":"ref_75","doi-asserted-by":"crossref","first-page":"913","DOI":"10.3390\/s100100913","article-title":"Analysis of Large Scale Spatial Variability of Soil Moisture Using a Geostatistical Method","volume":"10","author":"Lakhankar","year":"2010","journal-title":"Sensors"},{"key":"ref_76","doi-asserted-by":"crossref","first-page":"74","DOI":"10.1049\/iet-wss.2015.0079","article-title":"Location prediction optimisation in WSNs using Kriging interpolation","volume":"6","author":"Ali","year":"2016","journal-title":"IET Wirel. Sens. Syst."},{"key":"ref_77","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1016\/j.catena.2013.09.006","article-title":"A tutorial guide to geostatistics: Computing and modelling variograms and kriging","volume":"113","author":"Oliver","year":"2014","journal-title":"Catena"},{"key":"ref_78","doi-asserted-by":"crossref","unstructured":"Konak, A. (2010, January 5\u20138). Estimating path loss in wireless local area networks using ordinary kriging. Proceedings of the 2010 Winter Simulation Conference, Baltimore, MD, USA.","DOI":"10.1109\/WSC.2010.5678983"},{"key":"ref_79","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1007\/s10707-009-0078-3","article-title":"Spatial interpolation in wireless sensor networks: Localized algorithms for variogram modeling and kriging","volume":"14","author":"Umer","year":"2010","journal-title":"Geoinformatica"},{"key":"ref_80","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1016\/j.compag.2007.01.019","article-title":"From wireless sensors to field mapping: Anatomy of an application for precision agriculture","volume":"58","author":"Camilli","year":"2007","journal-title":"Comput. Electron. Agric."},{"key":"ref_81","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/S0022-1694(97)00152-2","article-title":"Spatial distribution of soil moisture in a small catchment. Part 1: Geostatistical analysis","volume":"206","author":"Bardossy","year":"1998","journal-title":"J. Hydrol."},{"key":"ref_82","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/j.jhydrol.2005.02.015","article-title":"Improved weighting methods, deterministic and stochastic data-driven models for estimation of missing precipitation records","volume":"312","author":"Teegavarapu","year":"2005","journal-title":"J. Hydrol."},{"key":"ref_83","doi-asserted-by":"crossref","first-page":"161","DOI":"10.3354\/cr024161","article-title":"Comparative analysis of interpolation methods in the middle Ebro Valley (Spain): Application to annual precipitation and temperature","volume":"24","author":"Sanchez","year":"2003","journal-title":"Clim. Res."},{"key":"ref_84","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1016\/S0022-1694(00)00144-X","article-title":"Geostatistical approaches for incorporating elevation into the spatial interpolation of rainfall","volume":"228","author":"Goovaerts","year":"2000","journal-title":"J. Hydrol."},{"key":"ref_85","doi-asserted-by":"crossref","first-page":"282","DOI":"10.1016\/0022-1694(70)90255-6","article-title":"River flow forecasting through conceptual models. Part I\u2014A discussion of principles","volume":"10","author":"Nash","year":"1970","journal-title":"J. Hydrol."},{"key":"ref_86","doi-asserted-by":"crossref","first-page":"829","DOI":"10.1080\/01621459.1979.10481038","article-title":"Robust Locally Weighted Regression and Smoothing Scatterplots","volume":"74","author":"Cleveland","year":"1979","journal-title":"J. Am. Stat. Assoc."},{"key":"ref_87","unstructured":"Northeast Regional Climate Center (NRCC). Available online: http:\/\/www.nrcc.cornell.edu."},{"key":"ref_88","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1016\/j.advwatres.2005.02.016","article-title":"On the interrelations between topography, soil depth, soil moisture, transpiration rates and species distribution at the hillslope scale","volume":"29","author":"McDonnell","year":"2006","journal-title":"Adv. Water Resour."},{"key":"ref_89","first-page":"497","article-title":"A Comparison of Three Methods to Estimate Evapotranspiration in Two Contrasting Loblolly Pine Plantations: Age-Related Changes in Water Use and Drought Sensitivity of Evapotranspiration Components","volume":"58","author":"Domec","year":"2012","journal-title":"For. Sci."},{"key":"ref_90","doi-asserted-by":"crossref","unstructured":"Chang, N.-B. (2012). Multiscale Hydrologic Remote Sensing: Perspectives and Applications, Taylor & Francis.","DOI":"10.1201\/b11279"},{"key":"ref_91","unstructured":"Pittsburgh Airport Meteorological Station. Available online: http:\/\/www.usclimatedata.com\/climate\/pittsburgh\/pennsylvania\/united-states\/uspa3601."},{"key":"ref_92","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1016\/S0022-1694(03)00077-5","article-title":"Inferring the location of catchment characteristic soil moisture monitoring sites: Covariance structures in the temporal domain","volume":"280","author":"Thierfelder","year":"2003","journal-title":"J. Hydrol."},{"key":"ref_93","doi-asserted-by":"crossref","unstructured":"Oliveira, L.M., and Rodrigues, J.J. (2011). Wireless Sensor Networks: A Survey on Environmental Monitoring. J. Commun., 6.","DOI":"10.4304\/jcm.6.2.143-151"},{"key":"ref_94","first-page":"1","article-title":"An Experimental Study of WSN Power Efficiency: MICAz Networks with XMesh","volume":"2012","author":"Davis","year":"2012","journal-title":"Int. J. Distrib. Sens. Netw."},{"key":"ref_95","doi-asserted-by":"crossref","unstructured":"Navarro, M., Li, Y., and Liang, Y. (2014, January 4\u20136). Energy profile for environmental monitoring wireless sensor networks. Proceedings of the 2014 IEEE Colombian Conference on Communications and Computing (COLCOM), Bogota, Colombia.","DOI":"10.1109\/ColComCon.2014.6860416"},{"key":"ref_96","doi-asserted-by":"crossref","unstructured":"Ferrari, G. (2010). Sensor Networks: Where Theory Meets Practice, Springer.","DOI":"10.1007\/978-3-642-01341-6"},{"key":"ref_97","doi-asserted-by":"crossref","unstructured":"Navarro, M., Bhatnagar, D., and Liang, Y. (2011, January 12\u201314). An integrated network and data management system for heterogeneous WSNs. Proceedings of the IEEE MASS 2011, Wuhan, China.","DOI":"10.1109\/MASS.2011.94"},{"key":"ref_98","doi-asserted-by":"crossref","first-page":"86","DOI":"10.1016\/j.agrformet.2012.07.001","article-title":"Partitioning of forest evapotranspiration: The impact of edge effects and canopy structure","volume":"166","author":"Ringgaard","year":"2012","journal-title":"Agric. For. Meteorol."},{"key":"ref_99","unstructured":"Hui, J.W., and Culler, D. (2004). Proceedings of the 2nd International Conference on Embedded Networked Sensor Systems\u2014SenSys\u201904;, ACM Press."},{"key":"ref_100","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1007\/s11104-007-9378-2","article-title":"Using branch and basal trunk sap flow measurements to estimate whole-plant water capacitance: A caution","volume":"305","author":"Burgess","year":"2008","journal-title":"Plant Soil"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/3\/636\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:30:51Z","timestamp":1760207451000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/3\/636"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,3,20]]},"references-count":100,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2017,3]]}},"alternative-id":["s17030636"],"URL":"https:\/\/doi.org\/10.3390\/s17030636","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2017,3,20]]}}}