TY - JOUR
T1 - Suspended sediment load, bed load, and dissolved load yields from a semiarid drainage basin
T2 - A 15-year study
AU - Alexandrov, Yulia
AU - Cohen, Hai
AU - Laronne, Jonathan B.
AU - Reid, Ian
PY - 2009/8/1
Y1 - 2009/8/1
N2 - A 15-year record for the semiarid upland Eshtemoa catchment provides a basis for estimating the efflux of water, sediment, and solutes in a type of environment for which there is a dearth of information. Average annual runoff was 5.4 mm, giving a runoff coefficient of 2.1%. Average annual yields were 275 Mg km-2 for suspended sediment, 15.3 Mg km-2 for bed load, and 0.6 Mg km-2 for dissolved load, though distinct seasonal differences are identified and related to the prevalence of cellular, convectively enhanced storms in autumn and spring and frontal storms in winter. The majority of the average annual total sediment and solute yield of 291 Mg km-2 is generated by as few as 8 of the 74 flow events of the 15-year record. The relative importance of bed load and the consequent ranking of the load components as suspended load » bed load » dissolved load distinguishes this dryland environment from its humid counterparts.
AB - A 15-year record for the semiarid upland Eshtemoa catchment provides a basis for estimating the efflux of water, sediment, and solutes in a type of environment for which there is a dearth of information. Average annual runoff was 5.4 mm, giving a runoff coefficient of 2.1%. Average annual yields were 275 Mg km-2 for suspended sediment, 15.3 Mg km-2 for bed load, and 0.6 Mg km-2 for dissolved load, though distinct seasonal differences are identified and related to the prevalence of cellular, convectively enhanced storms in autumn and spring and frontal storms in winter. The majority of the average annual total sediment and solute yield of 291 Mg km-2 is generated by as few as 8 of the 74 flow events of the 15-year record. The relative importance of bed load and the consequent ranking of the load components as suspended load » bed load » dissolved load distinguishes this dryland environment from its humid counterparts.
UR - http://www.scopus.com/inward/record.url?scp=70349770720&partnerID=8YFLogxK
U2 - 10.1029/2008WR007314
DO - 10.1029/2008WR007314
M3 - Article
AN - SCOPUS:70349770720
SN - 0043-1397
VL - 45
JO - Water Resources Research
JF - Water Resources Research
IS - 8
M1 - W08408
ER -