Suspended Load in the Colville River, Alaska, 1962

Seasonal controls on sediment delivery in a small coastal plain watershed, North Carolina, USA

“…The dominance of clockwise hysteresis loops in previous studies has been interpreted to suggest that a storm produced a sufficiently high discharge to mobilize nearby sources of sediment (along the channel and on nearby fields) and that these sources were exhausted on the rising limb of each storm hydrograph (Arnborg et al, 1967;Walling, 1974;Wood, 1977;VanSickle and Beschta, 1983;Klein, 1984;Jeje et al, 1991;Asselman and Middlekoop, 1998). However, several alternative explanations have been proposed including the length of time between events (Walling and Teed, 1971;Wood, 1977;Burt et al, 1983), the duration of the event (Wood, 1977;Jeje et al, 1991), variable contributions from gullies (diCenzo and Luk, 1997), higher rainfall intensities at the beginning of storms (Jeje et al, 1991), and a reduction in the erosive effects of rainfall and increased inputs from baseflow after the peak discharge (Gregory and Walling, 1973;Wood, 1977).…”

“…Seasonal differences in sediment concentration. clearly have an important influence on suspended sediment transport (Arnborg et al, 1967;Hall, 1967;Klein, 1984;Van Dijk and Kwaad, 1996;Steegen et al, 2000;Swiechowicz, 2002). Data from Littlefield show that seasonal variations in vegetation cover on agricultural fields, as well as within and along drainage ditches, influence sediment delivery.…”

“…Relationships between discharge and sediment concentration have long been recognized to show substantial variation at both the event and seasonal time scales (e.g., Hjulströ m, 1935;Leopold and Maddock, 1953;Heidel, 1956;Guy, 1964;Arnborg et al, 1967;Hall, 1967;Gregory and Walling, 1973). Hysteresis effects have been attributed to a variety of different mechanisms and have been used to make inferences about processes of soil erosion, sediment delivery, and sediment sources (Arnborg et al, 1967;Piest et al, 1975;Wood, 1977;Burt et al, 1983;Klein, 1984;Williams, 1989;diCenzo and Luk, 1997;Asselman and Middlekoop, 1998;Hudson, 2003).…”

“…Hysteresis effects have been attributed to a variety of different mechanisms and have been used to make inferences about processes of soil erosion, sediment delivery, and sediment sources (Arnborg et al, 1967;Piest et al, 1975;Wood, 1977;Burt et al, 1983;Klein, 1984;Williams, 1989;diCenzo and Luk, 1997;Asselman and Middlekoop, 1998;Hudson, 2003). Most researchers attribute clockwise hysteresis loops to the flushing and subsequent exhaustion of sediment from channel or nearby sources prior to the discharge peak (e.g., Burt et al, 1983), while counterclockwise loops suggest that sediment is delivered by hillslope processes and distant sediment sources (e.g., Klein, 1984).…”

Temporal variations of colloidal carrier phases and associated trace elements in a boreal river

“…For instance, most rivers at this latitude draining their water to the Arctic Ocean deliver 40-80% of the annual volume during the spring flood (Arnborg et al, 1967;Gordeev et al, 1996). The load of total suspended matter, organic carbon, and major and trace elements often show large variations in concentration during this episode (e.g.…”