Bedload transport associated with high stream power, Jordan River, Israel

Inbar, Moshe; Schick, Asher P.

doi:10.1073/pnas.76.6.2515

Cited by 26 publications

(10 citation statements)

References 4 publications

(3 reference statements)

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“…The Meshoshim stream ( Fig. 1) drains 160 Km 2 of basaltic terrain in the Golan Heights 7 and is not included within the Jordan River catchment. Nevertheless, the long-term pattern of N ORG in this stream ( Fig.…”

Section: Monitoring Of the Watershedmentioning

confidence: 99%

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Long-Term Impacts of Draining a Watershed Wetland on a Downstream Lake, Lake Kinneret, Israel

Nishri

2011

Air, Soil and Water Research

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During the 1950s, the shallow Lake Hula and its adjacent marshes, located in the watershed of Lake Kinneret (LK), were drained in order to increase arable land. The drainage resulted in increasing loads of nutrients in the Jordan River and in oxidative degradation of the underlying peat, followed by Aeolian (mostly) and riverine transport to LK. Peat had been accumulating in LK bed sediments since the 1950s, with peak deposits recorded in the mid-1970s. The routine monitoring of Norg and Corg, associated with the peat, in the watershed streams and in LK water (initiated in 1970) also showed the highest levels in the mid-1970s. During the 1980s, a succession of dense natural vegetation inhibited soil surface erosion and a decline in Aeolian transport of peat to LK was recorded. Inversed temporal patterns appear for oxygen and pH, and this is suggested to result from the dependence of these parameters on the magnitude of respiratory process, induced by peat availability. During the 1970s allochthonous peat resources supported about half of the zooplankton activity in LK and therefore the decline in peat availability during the 1980s was accompanied by a twofold decline in zooplankton biomass. The subsequent lessening of grazing pressure together with the elevated inflows of bio-available P resulted in a significant rise in LK phytoplankton biomass. The 1980s decline in Norg associated with the peat led to lower N/P ratios in the external sources of nutrients to LK. These conditions may have favored the appearance of N 2 fixing cyanobacteria noted in the lake since 1994.

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Section: Monitoring Of the Watershedmentioning

confidence: 99%

“…The Meshoshim stream (Fig. 1) is an example of a small perennial stream (~25 x 10 6 m 3 y -1 ) that drains 160 Km 2 of basaltic terrain in the Golan Heights 7 and flows into the lake from the north-eastern side.…”

Section: Metodsmentioning

confidence: 99%

Long-Term Impacts of Draining a Watershed Wetland on a Downstream Lake, Lake Kinneret, Israel

Nishri

2011

Air, Soil and Water Research

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“…In the Alps, Lenzi et al (2003) also found a bedload component of ∼ 25%, but the size of their study catchment was only 5 km 2 . Other researchers have estimated the bedload flux for rivers more similar to the Marsyandi over single flood events (e.g., Inbar and Schick, 1979), but not averaged over more than a century. Thus, this study is a significant contribution to our knowledge of mountain rivers in glaciated, rapidly eroding ranges.…”

Section: Suspended Load-to-bedload Ratiomentioning

confidence: 99%

Bedload-to-suspended load ratio and rapid bedrock incision from Himalayan Landslide-dam lake record

et al. 2007

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About 5400 cal yr BP, a large landslide formed a > 400-m-tall dam in the upper Marsyandi River, central Nepal. The resulting lacustrine and deltaic deposits stretched > 7 km upstream, reaching a thickness of 120 m. 14C dating of 7 wood fragments reveals that the aggradation and subsequent incision occurred remarkably quickly (∼ 500 yr). Reconstructed volumes of lacustrine (∼ 0.16 km3) and deltaic (∼ 0.09 km3) deposits indicate a bedload-to-suspended load ratio of 1:2, considerably higher than the ≤ 1:10 that is commonly assumed. At the downstream end of the landslide dam, the river incised a new channel through ≥ 70 m of Greater Himalayan gneiss, requiring a minimum bedrock incision rate of 13 mm/yr over last 5400 yr. The majority of incision presumably occurred over a fraction of this time, suggesting much higher rates. The high bedload ratio from such an energetic mountain river is a particularly significant addition to our knowledge of sediment flux in orogenic environments.

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“…The palaeo-Amblève can hence be expected to have experienced large peak flows during its periglacial phase despite a limited catchment area, which could be an argument in favour of the hydraulic transport of small boulders. Dislocation of boulders in stream channels or alluvial fans following intense precipitation or rapid ice and snow melting has indeed been reported for various environments and at channel slopes and flow discharges comparable to estimates for the palaeo-Amblève (e.g., Wolman and Eiler, 1958;Boothroyd and Nummedal, 1978;Inbar and Schick, 1979;Carling, 1986).…”

Section: Palaeocompetence In the Boulder Provenance Areamentioning

confidence: 90%

What was the transport mode of large boulders in the Campine Plateau and the lower Meuse valley during the mid-Pleistocene?

2015

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Bedload transport associated with high stream power, Jordan River, Israel

Cited by 26 publications

References 4 publications

Long-Term Impacts of Draining a Watershed Wetland on a Downstream Lake, Lake Kinneret, Israel

Long-Term Impacts of Draining a Watershed Wetland on a Downstream Lake, Lake Kinneret, Israel

Bedload-to-suspended load ratio and rapid bedrock incision from Himalayan Landslide-dam lake record

What was the transport mode of large boulders in the Campine Plateau and the lower Meuse valley during the mid-Pleistocene?

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