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Full-Text Articles in Social and Behavioral Sciences
Spatial And Temporal Controls On Streamflow Variability In The San Juan Mountains, Colorado, Christopher Lewis Hancock
Spatial And Temporal Controls On Streamflow Variability In The San Juan Mountains, Colorado, Christopher Lewis Hancock
Electronic Theses and Dissertations
This project characterizes and examines changes to the annual hydroclimatic cycle throughout alpine regions of Colorado with a focus on trends in snowpack and snowmelt hydrology. Datasets analyzed for this research include 79 SNOTEL sites throughout Colorado (24 in the San Juan Mountains) which provide climate metrics for Water Years 1988-2018. Impacts on streamflow are evaluated in the San Juan Region through a network of 11 USGS stream gauges. Correlation matrices and linear regression methods examine the relative controls on the magnitude and timing of discharge, and trend detection using the regional Kendall test quantifies the rate of change within …
Prediction Of Soil Formation As A Function Of Age Using The Percolation Theory Approach, Markus Egli, Allen G. Hunt, Dennis Dahms, Gerald Raab, Curdin Derungs, Salvatore Raimondi, Fang Yu
Prediction Of Soil Formation As A Function Of Age Using The Percolation Theory Approach, Markus Egli, Allen G. Hunt, Dennis Dahms, Gerald Raab, Curdin Derungs, Salvatore Raimondi, Fang Yu
Faculty Publications
Recent modeling and comparison with field results showed that soil formation by chemical weathering, either from bedrock or unconsolidated material, is limited largely by solute transport. Chemical weathering rates are proportional to solute velocities. Nonreactive solute transport described by non-Gaussian transport theory appears compatible with soil formation rates. This change in understanding opens new possibilities for predicting soil production and depth across orders of magnitude of time scales. Percolation theory for modeling the evolution of soil depth and production was applied to new and published data for alpine and Mediterranean soils. The first goal was to check whether the empirical …
Rock Glacier Hydrology In The San Juan Mountains, Colorado, Emilio Ian Mateo
Rock Glacier Hydrology In The San Juan Mountains, Colorado, Emilio Ian Mateo
Electronic Theses and Dissertations
Rock glaciers are unique geomorphological features located in alpine environments and are found in the San Juan Mountains of Colorado. There has been little research done on rock glaciers compared to their ice glacier counterparts. Most rock glaciers are located on the northern slope aspect in mountainous areas (Janke 2007), however, there are multiple in southwest Colorado with different aspects. This research project asks how slope aspect influences the hydrological processes of streams sourced from rock glaciers in the San Juan Mountains. This project focused on three basins that are adjacent to each other and share a common peak, Gilpin …
Alpine And Other Abandoned Towns Along The Great Northern Railroad Near Stevens Pass, Washington, 1890-1930, Stacy Marie Stanley
Alpine And Other Abandoned Towns Along The Great Northern Railroad Near Stevens Pass, Washington, 1890-1930, Stacy Marie Stanley
All Master's Theses
Despite the wealth of research on the early transcontinental railroads of the West, including certain areas in Washington State, there is little known about the railroad towns, camps and logging communities that arose due to the construction of the Great Northern Railroad in the Stevens Pass area. This thesis summarizes some of the information on the history of the study area, as well as results of a field investigation of archaeological remnants of one railroad town, the town of Alpine. Alpine was a short-lived town established during construction of the railroad ca. 1892 or a little later in 1910, and …
Quantitative Analysis Of Pinedale Landforms, Beartooth Mountains, Montana And Wyoming, William Graf
Quantitative Analysis Of Pinedale Landforms, Beartooth Mountains, Montana And Wyoming, William Graf
William L. Graf
The spatial distribution of terminal moraines in alpine valleys can be quantitatively described using distance/regression models. Surface parameters indicative of age may also be numerically analyzed. Evaluation of postglacial modification of valley sides between terminal moraines provides an additional indicator of relative age of valley segments. Analysis of the geomorphology of alpine features in the upper Rock Creek drainage in the southeastern Beartooth Mountains, Montana, shows that glaciers in this area deposited evidence of two Bull Lake, four Pinedale, and two Neo glacial advances.
The Geomorphology Of The Glacial Valley Cross Section, William Graf
The Geomorphology Of The Glacial Valley Cross Section, William Graf
William L. Graf
Several alpine valley systems in the southeastern Beartooth Mountains, Montana and Wyoming, have been examined using techniques similar to methods of stream system analysis. The general equation y = a x**b is the most adequate mathematical model for the cross valley profile; b values range between 1.5 and 2.0, indicating a parabolic form. As intensity of erosion increases in the glacial valley system, the b value also increases, indicating relatively deeper and narrower valley cross sections. The law of stream numbers, the law of stream lengths, and the bifurcation ratio, derived from fluvial geomorphology, are also applicable in glacial geomorphology.
Cirques As Glacier Locations, William Graf
Cirques As Glacier Locations, William Graf
William L. Graf
A comparison between the 319 cirques that contain glaciers and a sample of 240 empty cirques in the Rocky Mountains shows that in the present climatic situation, landforms are strong factors in determining the locations of glaciers. An optimum glacier location is a large cirque facing northeast, with a planimetric shape of width greater than length, high steep walls, a pass located to the windward, and a peak to the southwest. Glaciers survive in the present climatic conditions because of a geomorphic feedback system, whereby glaciers are protected by cirque forms that owe their morphology to glacial processes.
Cirques As Glacier Locations, William L. Graf
Cirques As Glacier Locations, William L. Graf
Faculty Publications
A comparison between the 319 cirques that contain glaciers and a sample of 240 empty cirques in the Rocky Mountains shows that in the present climatic situation, landforms are strong factors in determining the locations of glaciers. An optimum glacier location is a large cirque facing northeast, with a planimetric shape of width greater than length, high steep walls, a pass located to the windward, and a peak to the southwest. Glaciers survive in the present climatic conditions because of a geomorphic feedback system, whereby glaciers are protected by cirque forms that owe their morphology to glacial processes.
Quantitative Analysis Of Pinedale Landforms, Beartooth Mountains, Montana And Wyoming, William L. Graf
Quantitative Analysis Of Pinedale Landforms, Beartooth Mountains, Montana And Wyoming, William L. Graf
Faculty Publications
The spatial distribution of terminal moraines in alpine valleys can be quantitatively described using distance/regression models. Surface parameters indicative of age may also be numerically analyzed. Evaluation of postglacial modification of valley sides between terminal moraines provides an additional indicator of relative age of valley segments. Analysis of the geomorphology of alpine features in the upper Rock Creek drainage in the southeastern Beartooth Mountains, Montana, shows that glaciers in this area deposited evidence of two Bull Lake, four Pinedale, and two Neo glacial advances.
The Geomorphology Of The Glacial Valley Cross Section, William L. Graf
The Geomorphology Of The Glacial Valley Cross Section, William L. Graf
Faculty Publications
Several alpine valley systems in the southeastern Beartooth Mountains, Montana and Wyoming, have been examined using techniques similar to methods of stream system analysis. The general equation y = a x**b is the most adequate mathematical model for the cross valley profile; b values range between 1.5 and 2.0, indicating a parabolic form. As intensity of erosion increases in the glacial valley system, the b value also increases, indicating relatively deeper and narrower valley cross sections. The law of stream numbers, the law of stream lengths, and the bifurcation ratio, derived from fluvial geomorphology, are also applicable in glacial geomorphology.