Calibration and validation of the cosmic ray neutron rover for soil water mapping within two South African land classes

dc.contributor.authorVather, Thigesh
dc.contributor.authorEverson, Colin Stuart
dc.contributor.authorFranz, Trenton E.
dc.date.accessioned2020-05-11T14:47:40Z
dc.date.available2020-05-11T14:47:40Z
dc.date.issued2019-08-05
dc.descriptionSupplementary material: Excel document containing the Cosmic Ray Neutron Rover (raw) data and the Hydro-sense soil water data for Surveys one, two, three and four, at the hygrophilous grassland and pine forest site.en_ZA
dc.description.abstractKnowledge of soil water at a range of spatial scales would further our understanding of the dynamic variable and its influence on numerous hydrological applications. Cosmic ray neutron technology currently consists of the Cosmic Ray Neutron Sensor (CRNS) and the Cosmic Ray Neutron Rover (CRNR). The CRNR is an innovative tool to map surface soil water across the land surface. This research assessed the calibration and validation of the CRNR at two survey sites (hygrophilous grassland and pine forest) within the Vasi area with an area of 72 and 56 ha, respectively. The assessment of the calibrations showed that consistent calibration values (N0) were obtained for both survey sites. The hygrophilous grassland site had an average N0 value of 133.441 counts per minute (cpm) and an average error of 2.034 cpm. The pine site had an average N0 value of 132.668 cpm and an average error of 0.375 cpm between surveys. The validation of CRNR soil water estimates with interpolated hydro-sense soil water estimates showed that the CRNR can provide spatial estimates of soil water across the landscape. The hydro-sense and CRNR soil water estimates had a R2 of 0.439 at the hygrophilous grassland site and 0.793 at the pine site.en_ZA
dc.description.departmentPlant Production and Soil Scienceen_ZA
dc.description.librarianam2020en_ZA
dc.description.sponsorshipThe Partnerships for Enhanced Engagement in Research (USA); South African Agency for Science and Technology Advancement; United States Agency for International Development; University of KwaZulu-Natal; University of Pretoria; the National Research Foundation (NRF) of South Africa; the Department of Science and Technology (South African), theWater Research Commission (WRC) and the South African Environmental Observation Network (SAEON). T.E.F. acknowledges the financial support of The DaughertyWater Food Global Institute, the Global Engagement o ce of the University of Nebraska-Lincoln and the USDA National Institute of Food and Agriculture, Hatch project #1009760.en_ZA
dc.description.urihttps://www.mdpi.com/journal/hydrologyen_ZA
dc.identifier.citationVather T., Everson C. & Franz T.E. 2019, 'Calibration and validation of the cosmic ray neutron rover for soil water mapping within two South African land classes', Hydrology, vol. 6, no. 3, art. 65, pp. 1-21.en_ZA
dc.identifier.issn2306-5338 (online)
dc.identifier.other10.3390/hydrology6030065
dc.identifier.urihttp://hdl.handle.net/2263/74535
dc.language.isoenen_ZA
dc.publisherMDPIen_ZA
dc.rights© 2019 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.en_ZA
dc.subjectCosmic ray neutron technologyen_ZA
dc.subjectSpatial scaleen_ZA
dc.subjectCalibrationen_ZA
dc.subjectValidationen_ZA
dc.subjectSoil wateren_ZA
dc.subjectHygrophilous grasslanden_ZA
dc.subjectPine foresten_ZA
dc.subjectCosmic ray neutron sensor (CRNS)en_ZA
dc.subjectCosmic ray neutron rover (CRNR)en_ZA
dc.titleCalibration and validation of the cosmic ray neutron rover for soil water mapping within two South African land classesen_ZA
dc.typeArticleen_ZA

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