Hydrogeologic setting and preliminary estimates of hydrologic components for Bull Run Lake and the Bull Run Lake drainage basin, Multnomah and Clackamas counties, Oregon

Snyder, Daniel T.; Brownell, Dorie L.

doi:10.3133/wri964064

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…However, we use approaches and spatially uniform parameters validated in other studies (Hergarten, 2012;Sanne, 2015;Hergarten and Robl, 2015). Further, we assume that lakes are filled to the brim, which might not always happen in reality, due to loss of water via groundwater flow through the landslide deposits or river bed substrate (Snyder and Brownell, 1996).…”

Section: Limits and Amelioration Of The Methodsmentioning

confidence: 99%

Controls on the formation of potential landslide dams and dammed lakes in the Austrian Alps

Argentin¹,

Robl²,

Prasicek³

et al. 2020

Preprint

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Abstract. Controls on landsliding have long been studied, but the potential for landslide-induced dam and lake formation has received less attention. Here, we model possible landslides and the formation of landslide dams and lakes in the Austrian Alps. We combine a slope criterion with a probabilistic approach to determine landslide release areas and volumes. We then simulate the progression and deposition of the landslides with a fluid dynamic model. We characterize the resulting landslide deposits with commonly used metrics, investigate their relation to glacial land-forming and tectonic units, and discuss the roles of the drainage system and valley shape. Modeled landslide dams and lakes cover a wide volume range and lake volume increases linearly with landslide volume in case of efficient damming, i.e. small landslides damming large lakes, which is in line with real-world inventories. The distribution and size of potential landslide dams and lakes depends strongly on local topographic relief. For a given landslide volume, lake size depends on drainage area and valley geometry. Largest lakes form in glacial troughs, while most efficient damming occurs where landslides block a gorge downstream of a wide valley, a situation preferentially encountered at the transition between two different tectonic units. Our results also contain inefficient damming events, a damming type that exhibits different scaling of landslide and lake metrics than efficient damming, and is hardly reported in inventories. We hypothesize that such events also occur in the real world and need documentation to better understand the effects of landsliding on the drainage system.

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Section: Limits and Amelioration Of The Methodsmentioning

confidence: 99%

Controls on the formation of potential landslide dams and dammed lakes in the Austrian Alps

Argentin¹,

Robl²,

Prasicek³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…In contrast to field measurements, geomorphometric parameters obtained in a modeling study are highly precise, but assumptions and approximations made along the numerical process chain introduce uncertainty to the results. As an example, we assume that lakes are filled to the brim, which might not always happen in reality, due to loss of water via groundwater flow through the landslide deposits or riverbed substrate (Snyder and Brownell, 1996).…”

Section: Obstruction and Stability Indicesmentioning

confidence: 99%

“…From these considerations, the question arises of how potential landslide-dammed lakes are distributed across a mountain range and how dam and lake characteristics are related and vary regionally as a function of drainage area, topography and rock type. While landslides and their occurrence have been extensively studied, supported by monitoring techniques ranging from remote sensing to geophysics (e.g., Nichol and Wong, 2005;Hölbling et al, 2012;Stähli et al, 2015), modeling of landslide distribution (Hergarten, 2012) and susceptibility (Reichenbach et al, 2018), potential damming of rivers by landslides and resulting lakes has received less attention (Korup, 2005).…”

mentioning

confidence: 99%

Controls on the formation and size of potential landslide dams and dammed lakes in the Austrian Alps

Argentin

Robl

Prasicek

et al. 2021

Nat. Hazards Earth Syst. Sci.

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Abstract. Controls on landsliding have long been studied, but the potential for landslide-induced dam and lake formation has received less attention. Here, we model possible landslides and the formation of landslide dams and lakes in the Austrian Alps. We combine a slope criterion with a probabilistic approach to determine landslide release areas and volumes. We then simulate the progression and deposition of the landslides with a fluid dynamic model. We characterize the resulting landslide deposits with commonly used metrics, investigate their relation to glacial land-forming and tectonic units, and discuss the roles of the drainage system and valley shape. We discover that modeled landslide dams and lakes cover a wide volume range. In line with real-world inventories, we further found that lake volume increases linearly with landslide volume in the case of efficient damming – when an exceptionally large lake is dammed by a relatively small landslide deposit. The distribution and size of potential landslide dams and lakes depends strongly on local topographic relief. For a given landslide volume, lake size depends on drainage area and valley geometry. The largest lakes form in glacial troughs, while the most efficient damming occurs where landslides block a gorge downstream of a wide valley, a situation preferentially encountered at the transition between two different tectonic units. Our results also contain inefficient damming events, a damming type that exhibits different scaling of landslide and lake metrics than efficient damming and is hardly reported in inventories. We assume that such events also occur in the real world and emphasize that their documentation is needed to better understand the effects of landsliding on the drainage system.

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Environmental setting of the Willamette basin, Oregon

Uhrich¹,

Wentz²

1999

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Hydrogeologic setting and preliminary estimates of hydrologic components for Bull Run Lake and the Bull Run Lake drainage basin, Multnomah and Clackamas counties, Oregon

Cited by 3 publications

References 9 publications

Controls on the formation of potential landslide dams and dammed lakes in the Austrian Alps

Controls on the formation of potential landslide dams and dammed lakes in the Austrian Alps

Controls on the formation and size of potential landslide dams and dammed lakes in the Austrian Alps

Environmental setting of the Willamette basin, Oregon

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