Late Quaternary deposition and erosion processes along the margins of the Yamin Plain, northeast Negev, Israel

Abstract

Dody, A., Nahlieli, A., Avni, Y., Cohen, H., Weiner, D., and Porat, N. 2008. Late Quaternary deposition and erosion processes along the margins of the Yamin Plain, northeast Negev, Israel. Isr. J. Earth Sci. 57: 199-211.This study presents rates of accumulation and transport of sands as well as rates of incision along the margins of the Yamin Plain, northeastern Negev, and evaluates the stability of the present landscape. Geomorphological mapping, OSL and 14 C dating, and sedimentological analyses suggest that rates of erosion range between ~45 mm/year in the eastern side of the study area and 0.05 mm/y on the western side. The calculated erosion rates show that, until recently, geomorphic processes in the eastern part of the plain were dominated by accumulation of sands derived from the Hazeva Group. However, accelerated erosion is observed near the contact between the sand units and the carbonate bedrock of the Judea Group. It appears that the area west of the plain has been stable during the last glacial (circa 73-18 ka). We suggest that the exclusion of domestic grazing from the Yamin Plain in the 1950s changed the balance between erosion and sedimentation and caused accelerated erosion mainly in the eastern part of the Yamin Plain by decreasing infiltration and increasing runoff.

Integration Techniques for Environmental Impact Assessment of Industrial Pollutants

“…The entire mentioned article reported that bedload sediments were very high. The erosion rates in YP were studied in different techniques during 300 Ky; OSL [31], cosmogenic isotope [32], and qualitatively analyses using aerial photos and satellites images [40]. In the current research, the erosion was calculated for the two fit events and presented in Table 6.…”

“…Therefore, knowing and understanding the natural processes in the watershed, mainly geomorphology, floods, surface erosion rate are very important for managing and maintaining the waste facilities. Previous research has determined erosion rates for 300k-year periods in the YP using optical stimulated luminescence (OSL) [31] and cosmogenic isotopes [32]. DOI: 10.5963/IJEP0701002 However, calculation of erosion rates for single flood events does not exist for this watershed.…”