Tamir Grodek | The Hebrew University of Jerusalem (original) (raw)

Tamir Grodek

Alluvial fans and channels hydrology, landscape morphology, and flood hazard
Address: Calle Redecilla Del Camino 9, Madrid, Spain

less

Uploads

Papers by Tamir Grodek

Geomorphology, Jul 1, 2018

Hydrological Processes, Nov 1, 1994

Page 1. HYDROLOGICAL PROCESSES, VOL. 8, 497-51 1 (1994) INDIRECT ESTIMATION OF UNGAUGED PEAK DISC... more Page 1. HYDROLOGICAL PROCESSES, VOL. 8, 497-51 1 (1994) INDIRECT ESTIMATION OF UNGAUGED PEAK DISCHARGES IN A BEDROCK CHANNEL WITH REFERENCE TO DESIGN DISCHARGE SELECTION PAUL ...

Geomorphology, Dec 1, 1999

Journal of Hydrology: Regional Studies

We present the Satellite Vegetation Index Time Series model for detecting historical floods in un... more We present the Satellite Vegetation Index Time Series model for detecting historical floods in ungauged hyperarid regions (SatVITS-Flood). SatVITS-Flood is based on observations that floods are the primary cause of local vegetation expansion in hyperarid regions. To detect such expansion, we used two time series metrics: (1) trend change detection from the Breaks For Additive Season and Trend (BFAST-trend) and (2) a newly developed seasonal change metric based on Temporal Fourier Analysis (TFA) and the growing-season integral anomaly (TFA-GSIanom). The two metrics complement each other by capturing changes in perennial species following extreme, rare floods and ephemeral vegetation changes following more frequent floods. Metrics were derived from the time series of the normalized difference vegetation index (NDVI), the modified soil-adjusted vegetation index (MSAVI), and the normalized difference water index (NDWI), acquired from MODIS, Landsat, and AVHRR. The timing of the change w...

Journal of Hydrology, Mar 1, 2020

GSA Annual Meeting in Denver, Colorado, USA - 2016, 2016

Hydraulic Engineering, 1994

Data from two small ephemeral streams in Israel indicate that step pool geometry in bedrock chann... more Data from two small ephemeral streams in Israel indicate that step pool geometry in bedrock channels is similar, in its salient features, to that in alluvial channels. For steep (>0.10) bedrock channels the average step length is quasi-constant. Well developed steps found in very small, lithologically homogeneous channels suggest that low magnitude high frequency events play a role in their formation. In Nahal Meshushim (drainage area 14 km 2 ) the water surface reconstructed from the highest flood marks indicates that all steps, though partly submerged, retain clear discontinuities between moderately sloping segments.