TY - JOUR
T1 - An evaluation of two ten-year sediment budgets, nahal yael, Israel
AU - Schick, Asher P.
AU - Lekach, Judith
PY - 1993
Y1 - 1993
N2 - The method used to derive a crude ten-year sediment budget for Nahal Yael—a small hyper-arid catchment in the Southern Negev Desert—is applied to a later ten-year period, for which a much more accurate sediment budget is available. Results indicate that the budget of the first decade has overestimated the suspended sediment output by a factor of four, and underestimated the bed material output by a factor of two. Evaluated against the background of similar sediment budget studies, it is concluded that the main source of potential errors in sediment budgets, especially in those involving considerable amounts of bed material, lies not so much in the volumetric before-after comparisons, based on surveying. Rather, errors are caused mainly by the inadequate procedures presently available for the estimation of sediment input into, and output from, the studied reach.
AB - The method used to derive a crude ten-year sediment budget for Nahal Yael—a small hyper-arid catchment in the Southern Negev Desert—is applied to a later ten-year period, for which a much more accurate sediment budget is available. Results indicate that the budget of the first decade has overestimated the suspended sediment output by a factor of four, and underestimated the bed material output by a factor of two. Evaluated against the background of similar sediment budget studies, it is concluded that the main source of potential errors in sediment budgets, especially in those involving considerable amounts of bed material, lies not so much in the volumetric before-after comparisons, based on surveying. Rather, errors are caused mainly by the inadequate procedures presently available for the estimation of sediment input into, and output from, the studied reach.
UR - http://www.scopus.com/inward/record.url?scp=0027871344&partnerID=8YFLogxK
U2 - 10.1080/02723646.1993.10642477
DO - 10.1080/02723646.1993.10642477
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AN - SCOPUS:0027871344
SN - 0272-3646
VL - 14
SP - 225
EP - 238
JO - Physical Geography
JF - Physical Geography
IS - 3
ER -