Critical zone evolution&lt;subtitle&gt;Climate and exhumation in the Colorado Front Range&lt;/subtitle&gt;

Anderson, Suzanne P.; Anderson, Robert S.; Tucker, Gregory E.; Dethier, David P.

doi:10.1130/2013.0033(01)

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…The lithology is characterized by four soil types: soil, saprolite, weathered bedrock, and unweathered bedrock (Figure 2). This composition has been identified by geophysical surveys, soil pit hand‐dug records, and well lithology records (Anderson et al., 2013; Befus et al., 2011; Shea, 2013). The initial parameters, K s , θ r , θ s , α, n , (Table 1), are obtained from a previous calibrated model and field study of the upper Gordon Gulch drainage basin (Henning, 2016).…”

Section: Methodsmentioning

confidence: 74%

Examining subsurface response to an extreme precipitation event using HYDRUS‐1D

Corona

2022

Vadose Zone Journal

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North-central Colorado experienced an extreme precipitation event (EPE) in September 2013, during which the equivalent of 80% of the region's annual average precipitation fell in a few days. Widespread flooding occurred above ground, but the shortand long-term subsurface response remains unclear. The objective of the study is to better understand the dynamic subsurface response, namely how the water table and soil water storage responded to a large amount of infiltration in a short period of time and how the hydrologic properties of the subsurface influence the response. Better understanding of subsurface response to EPEs is expected to increase with the advent of more intense and frequent EPEs in the coming decades. A one-dimensional subsurface flow model using HYDRUS-1D, was built to simulate and examine infiltration of an EPE at a site in the Boulder Creek Watershed, Colorado. Model calibration was conducted with local field data to fit site observations over a 6-yr period. A rapid water table depth response in field observations was observed, with the modeled subsurface storing water for 18 mo acting as a hydro-buffer during recovery. To examine influence on model results, a sensitivity study of soil hydraulic parameters was conducted. The sensitivity study found that changes in n, an empirical parameter related to pore-size distribution, most significantly affects water table depth. The implications are that one-dimensional models may provide useful estimates of water table fluctuations and subsurface hydro-buffer capacities in response to EPEs, which could be of use to regions preparing for EPE effect on water resources.

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Section: Methodsmentioning

confidence: 74%

Examining subsurface response to an extreme precipitation event using HYDRUS‐1D

Corona

2022

Vadose Zone Journal

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Solar radiation as a global driver of hillslope asymmetry: Insights from an ecogeomorphic landscape evolution model

Yetemen

Istanbulluoglu

Duvall

2015

Water Resources Research

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Observations at the field, catchment, and continental scales across a range of arid and semiarid climates and latitudes reveal aspect-controlled patterns in soil properties, vegetation types, ecohydrologic fluxes, and hillslope morphology. Although the global distribution of solar radiation on earth's surface and its implications on vegetation dynamics are well documented, we know little about how variation of solar radiation across latitudes influence landscape evolution and resulting geomorphic difference. Here, we used a landscape evolution model that couples the continuity equations for water, sediment, and aboveground vegetation biomass at each model element in order to explore the controls of latitude and mean annual precipitation (MAP) on the development of hillslope asymmetry (HA). In our model, asymmetric hillslopes emerged from the competition between soil creep and vegetation-modulated fluvial transport, driven by spatial distribution of solar radiation. Latitude was a primary driver of HA because of its effects on the global distribution of solar radiation. In the Northern Hemisphere, north-facing slopes (NFS), which support more vegetation cover and have lower transport efficiency, get steeper toward the North Pole while south-facing slopes (SFS) get gentler. In the Southern Hemisphere, the patterns are reversed and SFS get steeper toward the South Pole. For any given latitude, MAP is found to have minor control on HA. Our results underscore the potential influence of solar radiation as a global control on the development of asymmetric hillslopes in fluvial landscapes.

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Water-table response to extreme precipitation events

Corona

Anderson

2023

Journal of Hydrology

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Critical zone evolution<subtitle>Climate and exhumation in the Colorado Front Range</subtitle>

Cited by 3 publications

References 37 publications

Examining subsurface response to an extreme precipitation event using HYDRUS‐1D

Examining subsurface response to an extreme precipitation event using HYDRUS‐1D

Solar radiation as a global driver of hillslope asymmetry: Insights from an ecogeomorphic landscape evolution model

Water-table response to extreme precipitation events

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