Hillslope Erosion/Deposition (IMAGE) Arizona State University Caption Map of modeled cumulative hillslope erosion/deposition (HED) for the Wadi Ziqlab watershed after 200 years. The map shows HED due to human landuse, after subtracting 'natural' surface change from surface change with shifting cultivation and grazing. Credit The Mediterranean Landscape Dynamics Project/ASU/NSF Usage Restrictions with credit and in conjunction with story License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.