Print Email Facebook Twitter Estimation of Aerodynamic Roughness Length over Oasis in the Heihe River Basin by Utilizing Remote Sensing and Ground Data Title Estimation of Aerodynamic Roughness Length over Oasis in the Heihe River Basin by Utilizing Remote Sensing and Ground Data Author Chen, Q. Jia, L. Hutjes, R. Menenti, M. Faculty Civil Engineering and Geosciences Department Geoscience & Remote Sensing Date 2015-03-27 Abstract Most land surface models require information on aerodynamic roughness length and its temporal and spatial variability. This research presents a practical approach for determining the aerodynamic roughness length at fine temporal and spatial resolution over the landscape by combining remote sensing and ground measurements. The basic framework of Raupach, with the bulk surface parameters redefined by Jasinski et al., has been applied to optical remote sensing data collected by the HJ-1A/1B satellites. In addition, a method for estimating vegetation height was introduced to derive the aerodynamic roughness length, which is preferred by users over the height-normalized form. Finally, mapping different vegetation classes was validated taking advantage of the data-dense field experiments conducted in the Heihe Watershed Allied Telemetry Experimental Research (HiWATER) project. Overall, the roughness model performed well against the measurements collected at most HiWATER flux tower sites. However, deviations still occurred at some sites, which have been further analyzed. Subject aerodynamic roughness lengthremote sensingregional scaleagriculturalHeihe To reference this document use: http://resolver.tudelft.nl/uuid:9c7d192f-ddda-482c-88d0-29eb38e2ae39 DOI https://doi.org/10.3390/rs70403690 Publisher MDPI ISSN 2072-4292 Source Remote Sensing, 7 (4), 2015 Part of collection Institutional Repository Document type journal article Rights (c) 2015 The Author(s)This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/) Files PDF Menenti_2015.pdf 4.16 MB Close viewer /islandora/object/uuid:9c7d192f-ddda-482c-88d0-29eb38e2ae39/datastream/OBJ/view