ORCID Profile
0000-0002-2889-9316
Current Organisation
Ben-Gurion University of the Negev
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Publisher: Informa UK Limited
Date: 04-2008
DOI: 10.3166/GA.21.67-79
Publisher: Geological Society of America
Date: 23-08-2013
DOI: 10.1130/B30773.1
Publisher: MDPI AG
Date: 11-07-2022
DOI: 10.3390/LAND11071050
Abstract: Floods rarely occur in hyper-arid deserts and little is known about the magnitude and frequency of sediment delivery from their basins, despite their importance to changes to the landscape, infrastructures and engineering activities. Sediment yield from the Nahal Nehushtan watershed (11.9 km2) located in the Timna Valley in southern Israel was determined by assessing stratigraphic sections in its 60-year reservoir deposits. Stratigraphic correlation between event couplets allowed for quantification of sediment yields representing 13 former flow and flood events. Based on the sediment volume in the reservoir, the 29.8 t km−2 year−1 average specific sediment yield is one of the lowest among other studied warm deserts. Among the event layers, the thickest layer, deposited by a flash flood caused by a single short rain event, contributed 31% of the total sediment yield. Based on event reservoir sedimentation from watersheds located in several hyper-arid areas in the Middle East and North America, we demonstrate that sediment yield increases with drainage area as expected and mean annual sediment yield increases in hyper-arid areas with flood frequency. Our quantitative results, together with previous studies of hyper-arid areas, provide complementary evidence of fluvial sediment transport—the main landscape designer in hyper-arid fluvial landscapes.
Publisher: Elsevier BV
Date: 08-2015
Publisher: Wiley
Date: 18-05-2017
DOI: 10.1002/HYP.11189
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2017
Publisher: Elsevier BV
Date: 08-2017
Publisher: American Geophysical Union (AGU)
Date: 04-2021
DOI: 10.1029/2020WR028700
Abstract: Bedload transport is a key process in fluvial morphodynamics, but difficult to measure. The advent of seismic monitoring techniques has provided an alternative to in‐stream monitoring, which is often costly and cannot be utilized during large floods. Seismic monitoring is a method requiring several steps to convert seismic data into bedload flux data. State‐of‐the‐art conversion approaches exploit physical models predicting the seismic signal generated by bedload transport. However, due to a lack of well‐constrained validation data, the accuracy of the resulting inversions is unknown. We use field experiments to constrain a seismic bedload model and compare the results to high‐quality independent bedload measurements. Constraining the Green's function (i.e., seismic ground properties) with an active seismic survey resulted in an average absolute difference between modeled and empirically measured seismic bedload power of 11 dB in the relevant frequency band. Using generically estimated Green's function parameters resulted in a difference of 20 dB, thus highlighting the importance of using actual field parameters. Water turbulence and grain hiding are unlikely to be the cause of differences between field observations and our analysis. Rather, they may be either due to the inverted model being particularly sensitive to the coarse tail of the grain‐size distribution, which is least well constrained from field observations, or due to the seismic model underestimating effects of the largest grains.
Publisher: American Geophysical Union (AGU)
Date: 02-2016
DOI: 10.1002/2015WR017906
Publisher: Elsevier BV
Date: 03-2007
Publisher: American Geophysical Union (AGU)
Date: 08-2009
DOI: 10.1029/2008WR007314
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-1996
Publisher: Wiley
Date: 30-11-2021
Publisher: Elsevier BV
Date: 07-2008
Publisher: Wiley
Date: 25-11-2021
Publisher: Springer Science and Business Media LLC
Date: 11-1993
DOI: 10.1038/366148A0
Publisher: Wiley
Date: 30-09-2016
DOI: 10.1002/LDR.2605
Publisher: American Geophysical Union (AGU)
Date: 02-2017
DOI: 10.1002/2016JF004112
Abstract: Surrogate technologies to monitor bed load discharge have been developed to supplement and ultimately take over traditional direct methods. Our research deals with passive acoustic monitoring of bed load flux using a hydrophone continuously deployed near a river bed. This passive acoustic technology senses any acoustic waves propagated in the river environment and particularly the sound due to interparticle collisions emitted during bed load movement. A data set has been acquired in the large Alpine gravel‐bedded Drau River. Analysis of the short‐term frequency response of acoustic signals allows us to determine the origin of recorded noises and to consider their frequency variations. Results are compared with ancillary field data of water depth and bed load transport inferred from the signals of a geophone array. Hydrophone and geophone signals are well correlated. Thanks to the large network of deployed geophones, analysis of the spatial resolution of hydrophone measurements shows that the sensor is sensitive to bed load motion not only locally but over distances of 5–10 m (10–20% of river width). Our results are promising in terms of the potential use of hydrophones for monitoring bed load transport in large gravel bed rivers: acoustic signals represent a large river bed area, rather than being local hydrophones can be installed in large floods they can be deployed at a low cost and provide continuous monitoring at high temporal resolution.
Publisher: Wiley
Date: 27-07-2013
DOI: 10.1002/ESP.3288
Publisher: Informa UK Limited
Date: 06-2010
Publisher: Informa UK Limited
Date: 06-2010
Publisher: Wiley
Date: 02-1976
Publisher: Elsevier BV
Date: 02-2014
Publisher: Wiley
Date: 02-1982
Publisher: Wiley
Date: 09-09-2020
DOI: 10.1002/ESP.4988
Publisher: Elsevier BV
Date: 07-1994
Publisher: Elsevier BV
Date: 02-2007
Publisher: Oxford University Press (OUP)
Date: 2016
DOI: 10.1039/C6MT00055J
Abstract: The biologically important metals such as zinc, copper and iron play key roles in retinal function, yet no study has mapped the spatio-temporal distribution of retinal biometals in healthy or diseased retina.
Publisher: Public Library of Science (PLoS)
Date: 18-12-2014
Publisher: American Geophysical Union (AGU)
Date: 08-1995
DOI: 10.1029/95WR01486
Publisher: American Geophysical Union (AGU)
Date: 03-1995
DOI: 10.1029/94WR02233
Publisher: American Geophysical Union (AGU)
Date: 11-2010
DOI: 10.1029/2010WR009160
Publisher: Wiley
Date: 19-02-2018
DOI: 10.1002/HYP.11437
Publisher: Wiley
Date: 1995
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2023
Publisher: Elsevier BV
Date: 09-2016
Publisher: Elsevier BV
Date: 09-2013
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2002
Publisher: Elsevier BV
Date: 2010
Publisher: Wiley
Date: 02-12-2013
DOI: 10.1002/ESP.3499
Publisher: Elsevier BV
Date: 02-2007
Publisher: Springer Netherlands
Date: 2006
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-1999
Publisher: American Geophysical Union (AGU)
Date: 03-2007
DOI: 10.1029/2006GL028865
Publisher: Informa UK Limited
Date: 04-2008
DOI: 10.3166/GA.21.23-34
Publisher: Elsevier BV
Date: 02-2018
Publisher: American Geophysical Union (AGU)
Date: 04-2020
DOI: 10.1029/2019EF001274
Publisher: Elsevier BV
Date: 08-2000
Publisher: Springer Berlin Heidelberg
Date: 2011
Publisher: Elsevier BV
Date: 07-1994
Publisher: Elsevier BV
Date: 08-2013
Publisher: Wiley
Date: 11-05-2018
DOI: 10.1002/ESP.4392
Publisher: Elsevier BV
Date: 07-2014
DOI: 10.1016/J.SCITOTENV.2014.04.010
Abstract: The overall aim of the this study, which was conducted within the framework of the multilateral IWRM project SUMAR, was to expand the scientific basement to quantify surface- and groundwater fluxes towards the hypersaline Dead Sea. The flux significance for the arid vicinity around the Dead Sea is decisive not only for a sustainable management in terms of water availability for future generations but also for the resilience of the unique ecosystems along its coast. Coping with different challenges interdisciplinary methods like (i) hydrogeochemical fingerprinting, (ii) satellite and airborne-based thermal remote sensing, (iii) direct measurement with gauging station in ephemeral wadis and a first multilateral gauging station at the river Jordan, (iv) hydro-bio-geochemical approach at submarine and shore springs along the Dead Sea and (v) hydro(geo)logical modelling contributed to the overall aim. As primary results, we deduce that the following: (i) Within the drainage basins of the Dead Sea, the total mean annual precipitation amounts to 300 mm a(−1) west and to 179 mm a(−1) east of the lake, respectively. (ii) The total mean annual runoff volumes from side wadis (except the Jordan River) entering the Dead Sea is approximately 58–66 × 10(6) m(3) a(−1) (western wadis: 7–15 × 10(6) m(3) a(−1) eastern wadis: 51 × 10(6) m(3) a(−1)). (iii) The modelled groundwater discharge from the upper Cretaceous aquifers in both flanks of the Dead Sea towards the lake amounts to 177 × 10(6) m(3) a(−1). (iv) An unexpected abundance of life in submarine springs exists, which in turn explains microbial moderated geo-bio-chemical processes in the Dead Sea sediments, affecting the highly variable chemical composition of on- and offshore spring waters.The results of this work show a promising enhancement of describing and modelling the Dead Sea basin as a whole.
Publisher: Wiley
Date: 2005
DOI: 10.1002/HYP.5630
Publisher: American Geophysical Union (AGU)
Date: 05-2001
DOI: 10.1029/2000WR900342
Publisher: American Geophysical Union (AGU)
Date: 09-2022
DOI: 10.1029/2021JF006537
Abstract: Large, rarely mobile boulders are observed globally in mountainous bedrock channels. Recent studies suggest that high concentrations of boulders could be associated with channel morphological adjustment. However, a process‐based understanding of large boulder effects on channel morphology is limited, and data are scarce and ambiguous. Here, we develop a theory of steady‐state channel width and slope as a function of boulder concentration. Our theory assumes that channel morphology adjusts to maintain two fundamental mass balances: (a) grade, in which the channel transports the same sediment flux downstream despite boulders acting as roughness elements and (b) bedrock erosion, by which the channel erodes at the background tectonic uplift rate. Model predictions are normalized by a reference, boulder‐free channel width and slope, accounting for variations due to sediment supply, discharge, and lithology. Models are tested against a new data set from the Liwu River, Taiwan, showing steepening and widening with increasing boulder concentration. Whereas one of the explored mechanisms successfully explains the observed steepening trend, none of the models accuratly account for the observed width variability. We propose that this contrast arises from different adjustment timescales: while sediment bed slope adjusts within a few floods, width adjustment takes a much longer time. Overall, we find that boulders represent a significant perturbation to fluvial landscapes. Channels tend to respond by forming a new morphology that differs from boulder‐free channels. The general approach presented here can be further expanded to explore the role of other hydrodynamic effects associated with large, rarely mobile boulders.
Publisher: Informa UK Limited
Date: 04-2001
Publisher: Informa UK Limited
Date: 2012
Publisher: Wiley
Date: 30-03-1929
DOI: 10.1002/(SICI)1099-1085(19980330)12:4<543::AID-HYP593>3.0.CO;2-C
Publisher: Wiley
Date: 28-08-2017
DOI: 10.1002/ESP.4208
Publisher: American Geophysical Union (AGU)
Date: 06-11-2007
DOI: 10.1029/2007EO450008
Publisher: Elsevier BV
Date: 11-2014
Publisher: American Geophysical Union (AGU)
Date: 11-2019
DOI: 10.1029/2019WR026072
Publisher: Informa UK Limited
Date: 03-1998
Publisher: Wiley
Date: 11-1981
Publisher: Elsevier BV
Date: 2019
Publisher: Elsevier BV
Date: 2003
Publisher: Wiley
Date: 19-11-2019
DOI: 10.1002/HYP.13598
Publisher: American Geophysical Union (AGU)
Date: 06-2023
DOI: 10.1029/2022WR033754
Abstract: Evidence of the effect of unsteady flow on bedload sediment transport is meager, particularly in desert rivers, despite its scientific, environmental and engineering importance. Our study of the phenomenon was conducted in Nahal Eshtemoa, Israel, an ephemeral river located in a semi‐arid area and subjected to flash floods. During 4 years, we monitored bedload transport and contemporaneous hydraulics, focusing on two intervals during which flow changed most rapidly: (a) the arrival of flood bores over dry river beds and (b) the propagation of subsequent bores over flowing water. Monitoring involved deployment of plate microphones, video cameras, surface velocity radar and a 3D velocimeter, enabling synchronized and unique data acquisition at high temporal resolution. We hypothesized that turbulence would be considerably elevated during the arrival of a flood bore and that this would induce transient entrainment of bedload. Our results demonstrate that bedload is indeed transported by the bore front and ceases soon after the arrival of most bores, even though water depth continues to rise. Bores arriving on a dry river bed usually generate higher bedload fluxes than bores advancing over flowing water. Elevated values of shear stress, turbulent kinetic energy and water‐surface slope occur as a bore impinges but then decrease. This is likely to be the explanation for high transient rates of bedload transport. Once the threshold depth previously determined as inducing continuous bedload motion is attained (≈40 cm), transport rates rise considerably relative to those associated with the bores.
Publisher: Elsevier BV
Date: 10-1982
Publisher: Laser Pages Publishing Ltd.
Date: 12-2008
Publisher: Unpublished
Date: 2013
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2011
Publisher: American Geophysical Union (AGU)
Date: 12-2001
DOI: 10.1029/2001WR000260
Publisher: Wiley
Date: 03-02-2012
DOI: 10.1002/ESP.3199
Publisher: Wiley
Date: 24-09-2011
DOI: 10.1002/ESP.2066
Publisher: Informa UK Limited
Date: 10-07-2014
Publisher: Wiley
Date: 2007
DOI: 10.1002/ESP.1453
Publisher: Springer International Publishing
Date: 2016
Location: Japan
Location: United Kingdom of Great Britain and Northern Ireland
Location: United States of America
Location: No location found
No related grants have been discovered for Jonathan Laronne.