@misc{10481/93266,
year = {2024},
month = {5},
url = {https://hdl.handle.net/10481/93266},
abstract = {Field-characterised soil morphological data (to 1 m depth) and modelled soil
water release characteristics are recorded in the S-map database for soils covering
approximately 40% of New Zealand's soil area. This paper shows the development
of the Smap-Hydro database that estimates hydraulic parameters by
synergising soil morphologic data recorded in S-map and soil physics. The
Smap-Hydro parameters were derived using the bi-modal Kosugi hydraulic
function. The validity of the Smap-Hydro parameters was tested by applying
them within an uncalibrated physically based hydrological model (HyPix) and
comparing results with soil water content, θ, measured with Aquaflex soil
moisture probes (0–40 cm deep) at 24 sites across New Zealand. The HyPix
model provided an excellent fit with observed soil water content for 25% of the
sites, a good fit for 33% of the sites and a poor fit for 42% of the sites. Applying
the model to all soils in the S-map database required adjustments for the
occurrence of rock fragments, hydraulic discontinuities caused by soil pans
and required the addition of boundary conditions for water tables and the
occurrence of impermeable rock. A discussion on how we can further synergise
the development of pedotransfer functions with knowledge of soil physics
is provided.},
organization = {Core Funding for Crown
Research Institutes from the Ministry of Business,
Innovation and Employment's Science and Innovation
Group in New Zealand.},
publisher = {Wiley Online Library},
keywords = {hydraulic parameters},
keywords = {HyPix model},
keywords = {physical hydrological model},
title = {Derivation of physically based soil hydraulic parameters in New Zealand by combining soil physics and hydropedology},
doi = {10.1111/ejss.13502},
author = {Pollacco, J.A.P. and Fernández Gálvez, Jesús and Webb, T. and Vickers, S. and Robertson, Balin and McNeill, S. and Lilburne, Linda and Rajanayaka, Channa and Chau, H.W.},
}