In many tectonically active regions on Earth, landslides dominate sediment delivery to channels. While cosmogenic radionuclides (CRN) represent a valuable tool document basin‐averaged erosion rates, better understanding of CRN dynamics in these systems is required before rates can be reliably inferred from concentrations. The stochastic nature results variability concentrations both alluvial and hillslope samples that difficult poorly understood. To guide sampling strategies, we developed...

Research Article| July 01, 2010 How rivers react to large earthquakes: Evidence from central Taiwan Brian J. Yanites; Yanites * 1Department of Geological Sciences, University Colorado, Boulder, Colorado 80309, USA *Current address: Department Michigan, Ann Arbor, 48109, USA; E-mail: yanites@umich.edu. Search for other works by this author on: GSW Google Scholar Gregory E. Tucker; Tucker USA2Cooperative Institute in Environmental Science (CIRES), Karl Mueller; Mueller Yue-Gau Chen 3Department...

Abstract Variation in the erodibility of rock units has long been recognized as an important determinant landscape evolution but little studied models. We use a modified version Channel‐Hillslope Integrated Landscape Development (CHILD) model, which explicitly allows for variations strength, to reveal and explore remarkably rich, complex behavior induced by even very simple geologic settings with invariant climate tectonics. study importance relative contrasts between just two units, order...

Data on channel geometry in naturally incising bedrock rivers reveal variable relationships between width, slope, and erosion rate. To explain the range of these parameters, we propose an optimized model. The model reproduces previous theoretical numerical modeling scaling relationships; however, to field data, must incorporate effects immobile sediment cover that reduces vertical incision efficiency. Adding a system for given rate base level fall both widens steepens channel. We also find...

Research Article| July 01, 2010 Incision and channel morphology across active structures along the Peikang River, central Taiwan: Implications for importance of width Brian J. Yanites; Yanites † 1Department Geological Sciences, University Colorado, 2200 Colorado Avenue, Boulder, 80309, USA †E-mail: brian.yanites@colorado.edu Search other works by this author on: GSW Google Scholar Gregory E. Tucker; Tucker 2Cooperative Institute in Environmental Sciences Department Karl Mueller; Mueller...

Abstract The evolution of rivers in eroding landscapes plays a key role determining landscape relief and modulating climate‐tectonic interactions. A common approach to quantifying river system uses one‐dimensional, detachment‐limited stream power equation. One potential drawback this model is that it does not incorporate the effects changes channel width or sediment transport dynamics. Here I present new method for modeling influence on dynamics explore how variable impact profile evolution....

Abstract Landscape evolution is controlled by the development and organization of drainage basins. As a landscape evolves, reorganization events can occur via river capture or piracy, whereby one basin grows at expense another. The downstream location will generate transient topographic response as added water discharge increases sediment transport erosion efficiency. This erosional propagate upstream through both captured original Here we focus on quantifying impact along Rhine/Aare River...

Abstract Landscape evolution is a product of the forces that drive geomorphic processes (e.g., tectonics and climate) resistance to those processes. The underlying lithology structural setting in many landscapes set erosion. This study uses modified version Channel‐Hillslope Integrated Development (CHILD) landscape model determine effect spatially temporally changing erodibility terrain with complex base level history. Specifically, our focus quantify how effects variable influence transient...

Abstract Landscape evolution is driven by factors like tectonics and climate, unraveling such can reveal the history recorded in landscape morphology. The northern U.S. Cordillera features many potential drivers, as Yellowstone plume, extrusion of a large igneous province, drainage lakes. Among this complex geologic history, drivers transient incision Clearwater Salmon watersheds central Idaho are not well understood. To constrain pattern regional incision, we analyze morphologies 80...

Biodiversity hotspots in Earth’s mountain ranges suggest a strong connection between topographic development and biological processes. However, it remains unclear whether high biodiversity is an evolutionary response to the rate of relief generation during building. Focusing on small mammals, such as rodents, we used coupled landscape-biological simulations show that increases with magnitude tectonic uplift. This relationship, visible depositional lowlands over millions years, underscores...

[1] This study explores the hypothesis that relative frequency of rock exposure in bed an incising channel can have a first-order impact on long-term average erosion rate. The 1999 Chi-Chi earthquake central Taiwan generated thousands landslides along middle reach Peikang River. Sediment from these produced widespread aggradation, such much river's remains shielded active bedrock incision. We present data constrain spatial and temporal variability sediment cover for Because river is...

Abstract The isotopic composition of precipitation is used to trace water cycling and climate change, but interpretations the environmental information recorded in central Andean isotope ratios are hindered by a lack multi‐year records, poor spatial distribution observations, predominant focus on Rayleigh distillation. To better understand variability precipitation, we present three‐year record semimonthly δ 18 O p 2 H values from 15 stations southern Peru triple oxygen data, expressed as ∆′...

Abstract Bedrock rivers are the pacesetters of landscape evolution in uplifting fluvial landscapes. Water discharge variability and sediment transport important factors influencing bedrock river processes. However, little work has focused on sensitivity hillslope supply to precipitation events its implications tectonically active We model temporal water as evolve equilibrium over 10 6 years. explore how coupling with influences rates timing incision across climate regimes. find that strongly...

Abstract Few studies have constrained the magnitudes and timescales associated with large‐scale drainage captures (areas >10 3 km 2 ), even though these constraints are crucial to reconstruct sediment budgets, assess potential for reorganization be preserved in rock record, determine extent which environmental signals (i.e., structures, composition fossil assemblages within sedimentary rocks that influenced by supply transport) representative of conditions during deposition. In this work,...

Abstract Dam failures due to changing hydroclimate and ageing infrastructure pose a significant threat downstream river systems communities. The detailed geomorphic effects of catastrophic dam are not well known because lack high‐resolution topographic data before after failures. On 19 May 2020, the 17‐m‐tall Edenville 11‐m‐tall Sanford dams near Midland, Michigan, USA, failed as result rainfall over preceding 2 days. We analysed impacts these using pre‐failure airborne lidar dataset three...

River incision over geologic timescales can be a valuable indicator of regional surface uplift. However, extracting the timing uplift relative to onset is complicated by changes in precipitation commensurate with topographic development. Evidence large‐scale river on flanks Andean plateau has been cited support rapid and recent event. Recent climate modeling studies demonstrate large magnitudes change associated Andes, which may have influenced processes. Here we present an analysis...

Climatic controls on fluvial landscapes are commonly characterized in terms of mean annual precipitation. However, physical erosion processes driven by extreme events and therefore more directly related to the intensity, duration, frequency individual rainfall events. Climate also influences erosional indirectly controlling vegetation. In this study, we explore how interdependent climate vegetation properties affect landscape morphology at scale Andean orogen. The precipitation derived from...

Understanding the spatial distribution of glacial catchment erosion during glaciation has previously proven difficult due to limited access glacier bed. Recent advances in detrital thermochronology provide a new technique quantify source elevation sediment. This approach utilizes tendency thermochronometer cooling ages increase with and provides sediment tracer for erosion. We apply this Tiedeman Glacier heavily glaciated Mount Waddington region, British Columbia. A total 106 apatite...

Abstract Landslide dam outburst floods have a significant impact on landform evolution in high mountainous areas. Historic landslide dams the Yigong River, southeastern Tibet, generated two superfloods > 10 5 m 3 /s 1902 and 2000 AD. One of slackwater deposits, which was newly found immediately downstream historic dams, has been dated to 7 ka BP. The one-dimensional backwater stepwise method gives an estimate 225,000 for peak flow related paleo-stage indicator recurrence at least three...

Abstract Meandering river sinuosity increases until the channel erodes into itself (neck cutoff) or forms a new over floodplain (chute and is reduced. Unlike neck cutoff, which can be measured modelled without considering overbank processes, chute cutoff must at least partially controlled by channel‐forming processes on floodplain. Even though controls meandering form, that cause are not well understood. This study analyses morphology of two incipient cutoffs along East Fork White River,...