Height above the Nearest Drainage, a hydrologically relevant new terrain model

A.D. Nobre, L.A. Cuartas, M. Hodnett, C.D. Renno, G. Rodrigues, A. Silveira, M.J. Waterloo, S. Saleska

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    This paper introduces a new terrain model named HAND, and reports on the calibration and validation of landscape classes representing soil environments in Amazonia, which were derived using it. The HAND model normalizes topography according to the local relative heights found along the drainage network, and in this way, presents the topology of the relative soil gravitational potentials, or local draining potentials. The HAND model has been demonstrated to show a high correlation with the depth of the water table, providing an accurate spatial representation of soil water environments. Normalized draining potentials can be classified according to the relative vertical flowpath-distances to the nearest drainages, defining classes of soil water environments. These classes have been shown to be comparable and have verifiable and reproducible hydrological significance across the studied catchment and for surrounding ungauged catchments. The robust validation of this model over an area of 18,000km
    Original languageEnglish
    Pages (from-to)13-29
    JournalJournal of Hydrology
    Issue number404
    DOIs
    Publication statusPublished - 2011

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