Research Explorer

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Researcher

Hans Lievens

Publications & Research Data

Awards & Distinctions

72 Results

2025

C-band radar measurements in a snow-covered boreal forest environment

Isis BrangersGabrielle De LannoyHans-Peter MarshallDevon DunmireRandall BonnellBert CoxJona CappelleW. Brad BaxterHans Lievens

A1 Journal Article in IEEE GEOSCIENCE AND REMOTE SENSING LETTERS

Evaluating the performance of Sentinel‐1 SAR derived snow depth retrievals over the extratropical Andes Cordillera

N. BulovicF. JohnsonHans LievensT. E. ShawJ. McPheeS. GascoinM. DemuzereN. McIntyre

A1 Journal Article in WATER RESOURCES RESEARCH

Machine learning for snow depth estimation over the European Alps, using Sentinel-1 observations, meteorological forcing data and physically-based model simulations

Lucas BoeykensDevon DunmireJonas-Frederik JansWillem WaegemanGabriëlle De LannoyEzra BeernaertNiko VerhoestHans Lievens

Sensitivity of Sentinel-1 C-band SAR backscatter, polarimetry and interferometry to snow accumulation in the Alps

Jonas-Frederik JansEzra BeernaertMorgane De BreuckIsis BrangersDevon DunmireGabrielle De LannoyHans Lievens

A1 Journal Article in REMOTE SENSING OF ENVIRONMENT

2024

A machine learning approach for estimating snow depth across the European Alps from Sentinel-1 imagery

Devon DunmireHans LievensLucas BoeykensGabrielle J. M. De Lannoy

A1 Journal Article in REMOTE SENSING OF ENVIRONMENT

Assimilation of Sentinel-1 backscatter to update AquaCrop estimates of soil moisture and crop biomass

Shannon de RoosMichel BechtoldLouise BusschaertHans LievensGabrielle J. M. De Lannoy

A1 Journal Article in JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES

Contributions of irrigation modeling, soil moisture and snow data assimilation to high-resolution water budget estimates over the Po Basin : progress towards digital replicas

Gabrielle J. M. De LannoyMichel BechtoldLouise BusschaertZdenko HeyvaertSara ModanesiDevon DunmireHans LievensAugusto GetiranaChristian Massari

A1 Journal Article in JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS

Exploring the potential of future radar satellite missions for hydrological applications

Emma TronquoNiko VerhoestDiego MirallesHans Lievens

Identifying snowfall elevation patterns by assimilating satellite-based snow depth retrievals

Manuela GirottoGiuseppe FormettaShima AzimiClaire BachandMarianne CowherdGabrielle De LannoyHans LievensSara ModanesiMark S. RaleighRiccardo Rigon et al.

A1 Journal Article in SCIENCE OF THE TOTAL ENVIRONMENT

Linking Sentinel-1 to a coupled radiative transfer model : a spatio-temporal modeling analysis over the Alps

Jonas-Frederik JansZhenming HuangFiroz BorahEzra BeernaertIsis BrangersGabriëlle De LannoyEdward KimNiko VerhoestLeung TsangHans Lievens

Remote sensing of mountain snow from space: status and recommendations

Simon GascoinKari LuojusThomas NaglerHans LievensMariano MasiokasTobias JonasZhaojun ZhengPatricia De Rosnay

A1 Journal Article in FRONTIERS IN EARTH SCIENCEf

Sentinel-1 snow depth assimilation to improve river discharge estimates in the Western European Alps

Isis BrangersHans LievensAugusto GetiranaGabriëlle De Lannoy

A1 Journal Article in WATER RESOURCES RESEARCH

Tower-based C-band radar measurements of an alpine snowpack

Isis BrangersHans-Peter MarshallGabrielle De LannoyDevon DunmireChristian MatzlerHans Lievens

A1 Journal Article in CRYOSPHERE

2023

Assimilation of Sentinel-1 backscatter into a land surface model with river routing and its impact on streamflow simulations in two Belgian catchments

Michel BechtoldSara ModanesiHans LievensPierre BaguisIsis BrangersAlberto CarrassiAugusto GetiranaAlexander GruberZdenko HeyvaertChristian Massari et al.

A1 Journal Article in JOURNAL OF HYDROMETEOROLOGY

Long-short term memory networks as observation operator for the states in a conceptual hydrological model

Olivier BonteHans LievensNiko Verhoest

Optimisation of AquaCrop backscatter simulations using Sentinel-1 observations

Shannon de RoosLouise BusschaertHans LievensMichel BechtoldGabriëlle J.M. De Lannoy

A1 Journal Article in REMOTE SENSING OF ENVIRONMENT

2022

Assimilation of backscatter observations into a hydrological model : a case study in Belgium using ASCAT data

Pierre BaguisAlberto CarrassiEmmanuel RoulinStéphane VannitsemSara ModanesiHans LievensMichel BechtoldGabrielle De Lannoy

A1 Journal Article in REMOTE SENSING

Challenges and benefits of quantifying irrigation through the assimilation of Sentinel-1 backscatter observations into Noah-MP

Sara ModanesiChristian MassariMichel BechtoldHans LievensAngelica TarpanelliLuca BroccaLuca ZappaGabriëlle J. M. De Lannoy

A1 Journal Article in HYDROLOGY AND EARTH SYSTEM SCIENCES

Perspective on satellite-based land data assimilation to estimate water cycle components in an era of advanced data availability and model sophistication

Gabriëlle J. M. De LannoyMichel BechtoldClément AlbergelLuca BroccaJean-Christophe CalvetAlberto CarrassiWade T. CrowPatricia de RosnayMichael DurandBarton Forman et al.

A2 Journal Article in FRONTIERS IN WATER

Review article : Global monitoring of snow water equivalent using high-frequency radar remote sensing

Leung TsangMichael DurandChris DerksenAna P. BarrosDo-Hyuk KangHans LievensHans-Peter MarshallJiyue ZhuJoel JohnsonJoshua King et al.

A1 Journal Article in CRYOSPHERE

Sentinel-1 backscatter assimilation using support vector regression or the water cloud model at European soil moisture sites

Dominik RainsHans LievensGabrielle J. M. De LannoyMatthew F. McCabeRichard A. M. de JeuDiego Miralles

A1 Journal Article in IEEE GEOSCIENCE AND REMOTE SENSING LETTERS

Sentinel-1 snow depth retrieval at sub-kilometer resolution over the European Alps

Hans LievensIsis BrangersHans-Peter MarshallTobias JonasMarc OlefsGabriëlle De Lannoy

A1 Journal Article in CRYOSPHERE

Soil moisture retrieval using multistatic L-band SAR and effective roughness modeling

Emma TronquoHans LievensJean BouchatPierre DefournyNicolas BaghdadiNiko Verhoest

A1 Journal Article in REMOTE SENSING

2021

Optimizing a backscatter forward operator using Sentinel-1 data over irrigated land

Sara ModanesiChristian MassariAlexander GruberHans LievensAngelica TarpanelliRenato MorbidelliGabrielle J. M. De Lannoy

A1 Journal Article in HYDROLOGY AND EARTH SYSTEM SCIENCES

Prediction of active microwave backscatter over snow-covered terrain across Western Colorado using a land surface model and support vector machine regression

Jongmin ParkBarton A. FormanHans Lievens

A1 Journal Article in IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING

2020

Assimilation of Soil Moisture and Ocean Salinity (SMOS) brightness temperature into a large-scale distributed conceptual hydrological model to improve soil moisture predictions : the Murray-Darling basin in Australia as a test case

Renaud HostacheDominik RainsKaniska MallickMarco ChiniRamona PelichHans LievensFabrizio FeniciaGiovanni CoratoNiko VerhoestPatrick Matgen

A1 Journal Article in HYDROLOGY AND EARTH SYSTEM SCIENCES

Sentinel-1 detects firn aquifers in the Greenland ice sheet

I BrangersHans LievensC. MiegeMatthias DemuzereL. BruckerG. J. M. De Lannoy

A1 Journal Article in GEOPHYSICAL RESEARCH LETTERS

2019

Assessing the value of remote sensing and in situ data for flood inundation forecasts

Alexandra Van WesemaelNiko VerhoestHans Lievens

Improving flood inundation forecasts through the assimilation of in situ floodplain water level measurements based on alternative observation network configurations

Alexandra Van WesemaelLisa LanduytHans LievensNiko Verhoest

A1 Journal Article in ADVANCES IN WATER RESOURCES

L-band brightness temperature assimilation into a distributed hydrological model : application to the Community Land Model over Australia

Dominik RainsNiko VerhoestHans Lievens

Magnitude and variability of terrestrial evaporation from satellites and climate reanalyses

Brecht MartensDiego MirallesNiko VerhoestHans Lievens

Snow depth variability in the Northern Hemisphere mountains observed from space

Hans LievensMatthias DemuzereHans-Peter MarshallRolf H ReichleLudovic BruckerIsis BrangersPatricia de RosnayMarie DumontManuela GirottoWalter W Immerzeel et al.

A1 Journal Article in NATURE COMMUNICATIONS

2018

SMOS and SMAP brightness temperature assimilation over the Murrumbidgee Basin

Dominik RainsGabrielle JM De LannoyHans LievensJeffrey P WalkerNiko Verhoest

A1 Journal Article in IEEE GEOSCIENCE AND REMOTE SENSING LETTERS

Snow estimation under a vegetation gradient using satellite remote sensing data and land surface modeling during SnowEx 2017

Gabrielle De LannoyAnouck VanrykelHans LievensEd KimLudovic Brucker

2017

Assimilation of global radar backscatter and radiometer brightness temperature observations to improve soil moisture and land evaporation estimates

Hans LievensBrecht MartensNiko VerhoestS HahnRH ReichleDiego Miralles

A1 Journal Article in REMOTE SENSING OF ENVIRONMENT

Evaluation of the Oh, Dubois and IEM backscatter models using a large dataset of SAR data and experimental soil measurements

Mohammad ChokerNicolas BaghdadiMehrez ZribiMohammad El HajjSimonetta PalosciaNiko VerhoestHans LievensFrancesco Mattia

A1 Journal Article in WATER

GLEAM v3 : satellite-based land evaporation and root-zone soil moisture

Brecht MartensDiego MirallesHans LievensRobin van der SchalieRichard AM de JeuDiego Fernández-PrietoHylke E BeckWouter DorigoNiko Verhoest

A1 Journal Article in GEOSCIENTIFIC MODEL DEVELOPMENT

Global assessment of the SMAP level-4 surface and root-zone soil moisture product using assimilation diagnostics

Rolf H. ReichleGabrielle J. M. De LannoyQing LiuRandal D. KosterJohn S. KimballWade T. CrowJoseph V. ArdizzonePurnendu ChakrabortyDouglas W. CollinsAustin L. Conaty et al.

A1 Journal Article in JOURNAL OF HYDROMETEOROLOGY

Impact of the timing of a SAR image acquisition on the calibration of a flood inundation model

Sacha GobeynAlexandra Van WesemaelJeffrey NealHans LievensKatrien Van EerdenbrughNiels De VleeschouwerHilde VernieuweGuy J-P SchumannGiuliano Di BaldassarreBernard De Baets et al.

A1 Journal Article in ADVANCES IN WATER RESOURCES

Influence of surface roughness measurement scale on radar backscattering in different agricultural soils

Alex Martinez-AgirreJesús Álvarez-MozosHans LievensNiko Verhoest

A1 Journal Article in IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING

Influence of surface roughness sample size for C-band SAR backscatter applications on agricultural soils

Alex Martinez-AgirreJesús Álvarez-MozosHans LievensNiko VerhoestRafael Giménez

A1 Journal Article in IEEE GEOSCIENCE AND REMOTE SENSING LETTERS

Joint Sentinel-1 and SMAP data assimilation to improve soil moisture estimates

Hans LievensRH ReichleQ LiuGJM De LannoyRS DunbarSB KimNN DasM CoshJP WalkerW Wagner

A1 Journal Article in GEOPHYSICAL RESEARCH LETTERS

New empirical model for radar scattering from bare soils

Nicolas BaghdadiMohammad ChokerMehrez ZribiMohammad El HajjSimonetta PalosciaNiko VerhoestHans LievensFrederic BaupFrancesco Mattia

SMOS brightness temperature assimilation into the Community Land Model

Dominik RainsXujun HanHans LievensCarsten MontzkaNiko Verhoest

A1 Journal Article in HYDROLOGY AND EARTH SYSTEM SCIENCES

2016

A new empirical model for radar scattering from bare soil surfaces

Nicolas BaghdadiMohammad ChokerMehrez ZribiMohammad El HajjSimonetta PalosciaNiko VerhoestHans LievensFrederic BaupFrancesco Mattia

A1 Journal Article in REMOTE SENSING

Assimilation of SMOS soil moisture and brightness temperature products into a land surface model

Hans LievensGJM De LannoyA Al BitarM DruschG DumedahH-J Hendricks FranssenYH KerrSK TomerBrecht MartensO Merlin et al.

A1 Journal Article in REMOTE SENSING OF ENVIRONMENT

ESA's Soil Moisture and Ocean Salinity mission : from science to operational applications

S MecklenburgM DruschL KaleschkeN Rodriguez-FernandezN ReulY KerrJ FontM Martin-NeiraR OlivaE Daganzo-Eusebio et al.

A1 Journal Article in REMOTE SENSING OF ENVIRONMENT

Improving terrestrial evaporation estimates over continental Australia through assimilation of SMOS soil moisture

Brecht MartensDiego MirallesHans LievensD Fernández-PrietoNiko Verhoest

A1 Journal Article in INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION

2015

Copula-based downscaling of coarse-scale soil moisture observations with implicit bias correction

Niko VerhoestMartinus van den BergBrecht MartensHans LievensEric F WoodMing PanYann H KerrAhmad Al BitarSat K TomerMatthias Drusch et al.

A1 Journal Article in IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING

Estimating effective roughness parameters of the L-MEB model for soil moisture retrieval using passive microwave observations from SMAPVEX12

Brecht MartensHans LievensAndreas CollianderThomas J JacksonNiko Verhoest

A1 Journal Article in IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING

Optimization of a radiative transfer forward operator for simulating SMOS brightness temperatures over the Upper Mississippi Basin

Hans LievensA Al BitarNiko VerhoestF CabotGJM De LannoyM DruschG DumedahHJH FranssenY KerrSK Tomer et al.

A1 Journal Article in JOURNAL OF HYDROMETEOROLOGY

Semi-empirical calibration of the integral equation model for co-polarized L-band backscattering

Nicolas BaghdadiMehrez ZribiSimonetta PalosciaNiko VerhoestHans LievensFrederic BaupFrancesco Mattia

Semi-empirical calibration of the integral equation model for co-polarized L-band backscattering

Nicolas BaghdadiMehrez ZribiSimonetta PalosciaNiko VerhoestHans LievensFrederic BaupFrancesco Mattia

A1 Journal Article in REMOTE SENSING

Sensitivity of C-band backscatter to surface roughness parameters measured at different scales

Alex Martínez-AgirreJesús Álvarez-MozosHans LievensNiko VerhoestRafael Giménez

SMOS soil moisture assimilation for improved hydrologic simulation in the Murray Darling Basin, Australia

Hans LievensSK TomerA Al BitarGJM De LannoyM DruschG DumedahH-J Hendricks FranssenYH KerrBrecht MartensM Pan et al.

A1 Journal Article in REMOTE SENSING OF ENVIRONMENT

2013

An alternative roughness parameterization for soil moisture retrievals from passive microwave observations

Brecht MartensHans LievensJeff P WalkerR PancieraM TanaseA MonerrisY GaoX WuNiko Verhoest

Soil moisture retrieval from synthetic aperture radar: facing the soil roughness parameterization problem

Niko VerhoestHans Lievens

Bookchapter in Remote sensing of energy fluxes and soil moisture content

2012

Accounting for seasonality in a soil moisture change detection algorithm for ASAR Wide Swath time series

Jasper Van doninckJan PetersHans LievensBernard De BaetsNiko Verhoest

A1 Journal Article in HYDROLOGY AND EARTH SYSTEM SCIENCES

Assessment of SAR-retrieved soil moisture uncertainty induced by uncertainty on modeled soil surface roughness

Eva De KeyserHilde VernieuweHans LievensJ Álvarez-MozosBernard De BaetsNiko Verhoest

A1 Journal Article in INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION

Random forests as a tool for estimating uncertainty at pixel-level in SAR image classification

Lien LoosveltJan PetersHenning SkriverHans LievensFrieke VancoillieBernard De BaetsNiko Verhoest

A1 Journal Article in INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION

Spatial and temporal soil moisture estimation from RADARSAT-2 imagery over Flevoland, The Netherlands

Hans LievensNiko Verhoest

A1 Journal Article in JOURNAL OF HYDROLOGY

2011

Effective roughness modelling as a tool for soil moisture retrieval from C-and L-band SAR

Hans LievensNiko VerhoestEva De KeyserHilde VernieuweP MatgenJ Alvarez-MozosBernard De Baets

A1 Journal Article in HYDROLOGY AND EARTH SYSTEM SCIENCES

On the retrieval of soil moisture in wheat fields from L-band SAR based on water cloud modeling, the IEM, and effective roughness parameters

Hans LievensNiko Verhoest

A1 Journal Article in IEEE GEOSCIENCE AND REMOTE SENSING LETTERS

Possibilistic soil roughness identification for uncertainty reduction on SAR-retrieved soil moisture

Hilde VernieuweNiko VerhoestHans LievensBernard De Baets

A1 Journal Article in IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING

Soil moisture retrieval from radar remote sensing using alternative approaches to surface roughness measurements

Hans LievensNiko Verhoest

Training neural networks on artificially generated data: a novel approach to SAR speckle removal

Frieke VancoillieHans LievensIsabelle JoosAleksandra PizuricaLieven VerbekeRobert De WulfNiko Verhoest

A1 Journal Article in INTERNATIONAL JOURNAL OF REMOTE SENSING

2009

Error in radar-derived soil moisture due to roughness parameterization: an analysis based on synthetical surface profiles

Hans LievensHilde VernieuweJesus Alvarez-MozosBernard De BaetsNiko Verhoest

A1 Journal Article in SENSORS

SAR speckle removal by neural networks trained on artificially generated data

Frieke VancoillieHans LievensIsabelle JoosAleksandra PizuricaLieven VerbekeRobert De WulfNiko Verhoest

2008

On the soil roughness parameterization problem in soil moisture retrieval of bare surfaces from synthetic aperture radar

Niko VerhoestHans LievensW WAGNERJ ALVAREZ-MOZOSMS MORANF MATTIA

A1 Journal Article in SENSORS

Remote sensing and wetland ecology: a South African case study

ER DE ROECKNiko VerhoestMH MIYAHans LievensO BATELAANA THOMASL BRENDONCK

A1 Journal Article in SENSORS

Soil moisture retrieval from co-polarized ALOS PALSAR backscattering in the Zwalm and Alzette catchments

Hans LievensHilde VernieuweNiko VerhoestBernard De BaetsP MatgenM MontanariL HoffmannF Mattia

2007

Detection of small non-vegetated wetlands in the Cape Flats, South Africa, using Envisat ASAR imagery

Hans LievensToon WestraLieven VerbekeNiko VerhoestRobert De WulfA ThomasE De RoeckL Brendonck