Improved representation of soil moisture processes through incorporation of cosmic-ray neutron count measurements  in a large-scale hydrologic model

Fatima, Eshrat; Kumar, Rohini; Attinger, Sabine; Kaluza, Maren; Rakovec, Oldrich; Rebmann, Corinna; Rosolem, Rafael; Oswald, Sascha E.; Samaniego, Luis; Zacharias, Steffen; Schrön, Martin

doi:https://doi.org/10.5194/hess-28-5419-2024

Articles | Volume 28, issue 24

https://doi.org/10.5194/hess-28-5419-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/hess-28-5419-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 28, issue 24

Research article

|

17 Dec 2024

Research article |

| 17 Dec 2024

Improved representation of soil moisture processes through incorporation of cosmic-ray neutron count measurements in a large-scale hydrologic model

Eshrat Fatima, Rohini Kumar, Sabine Attinger, Maren Kaluza, Oldrich Rakovec, Corinna Rebmann, Rafael Rosolem, Sascha E. Oswald, Luis Samaniego, Steffen Zacharias, and Martin Schrön

Supplement

https://doi.org/10.5194/hess-28-5419-2024-supplement

Data sets

Earth Resources Observation and Science (EROS) Center July 13, 2018 USGS https://www.usgs.gov/centers/eros/science/usgs-eros-archive-digital-elevation-global-multi-resolution-terrain-elevation

Soil map of Germany 1:1,000,000 (BUEK1000) (year:2018) BGR - Federal Institute for Geosciences and Natural Resources https://geoportal.bgr.de/mapapps/resources/apps/geoportal/index.html?lang=en#/datasets/portal/154997F4-3C14-4A53-B217-8A7C7509E05F

GLiM - Global Lithological Map Universität Hamburg https://www.geo.uni-hamburg.de/en/geologie/forschung/aquatische-geochemie/glim.html

Global land cover facility (GLCF) Iri http://iridl.ldeo.columbia.edu/SOURCES/.UMD/.GLCF/.GIMMS/.NDVIg/.global/index.html

Globcover ESA - European Space Agency http://due.esrin.esa.int/page_globcover.php

Long-term daily hydrometeorological drought indices, soil moisture, and evapotranspiration for ICOS ecosystem sites (1.2) [Data set] F. Pohl et al. https://doi.org/10.5281/zenodo.7561854

Model code and software

mhm-ufz/mHM: v5.13.1 (v5.13.1) Luis Samaniego et al. https://doi.org/10.5281/zenodo.8279545

Short summary

This study establishes a framework to incorporate cosmic-ray neutron measurements into the mesoscale Hydrological Model (mHM). We evaluate different approaches to estimate neutron counts within the mHM using the Desilets equation, with uniformly and non-uniformly weighted average soil moisture, and the physically based code COSMIC. The data improved not only soil moisture simulations but also the parameterisation of evapotranspiration in the model.