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Full-Text Articles in Physical Sciences and Mathematics
Hydrologic Implications Of Snow-Vegetation Interactions In A Semiarid Mountain Climate, Maggi Kraft
Hydrologic Implications Of Snow-Vegetation Interactions In A Semiarid Mountain Climate, Maggi Kraft
Boise State University Theses and Dissertations
Knowledge of the complex interaction between snow, vegetation, and streamflow in semiarid mountain climates is necessary for predicting water resources. The effects of warming temperatures on snow distribution will cascade into vegetation water use and streamflow. Due to our reliance on snow water resources, it is necessary to understand how vegetation affects snow distribution, how vegetation uses snow water inputs and the subsequent effects on streamflow in the current and warming climate. The overall objective of this research is to improve our understanding of snow-vegetation interactions in a semiarid climate. In this dissertation, I use field data to evaluate how …
From Drought To Flood: A Water Balance Analysis Of The Tuolumne River Basin During Extreme Conditions (2015–2017), Andrew R. Hedrick, Danny Marks, Hans-Peter Marshall, James Mcnamara, Scott Havens, Ernesto Trujillo
From Drought To Flood: A Water Balance Analysis Of The Tuolumne River Basin During Extreme Conditions (2015–2017), Andrew R. Hedrick, Danny Marks, Hans-Peter Marshall, James Mcnamara, Scott Havens, Ernesto Trujillo
Geosciences Faculty Publications and Presentations
The degree to which the hydrologic water balance in a snow‐dominated headwater catchment is affected by annual climate variations is difficult to quantify, primarily due to uncertainties in measuring precipitation inputs and evapotranspiration (ET) losses. Over a recent three‐year period, the snowpack in California's Sierra Nevada fluctuated from the lightest in recorded history (2015) to historically heaviest (2017), with a relatively average year in between (2016). This large dynamic range in climatic conditions presents a unique opportunity to investigate correlations between annual water availability and runoff in a snow‐dominated catchment. Here, we estimate ET using a water balance approach where …
Does The Urbanization Of Agricultural Land Lead To More Or Less Evapotranspiration?, Curtis Ryan Crandall
Does The Urbanization Of Agricultural Land Lead To More Or Less Evapotranspiration?, Curtis Ryan Crandall
Boise State University Theses and Dissertations
Agricultural areas within the western U.S. are undergoing rapid urbanization due to population growth. Urban expansion often forces the conversion of adjacent agricultural areas altering the landscape vegetation and associated water consumption through evapotranspiration (ET). The associated difference in ET may alter the landscape water demand complicating water resource management. To investigate these differences, we calculated the agricultural and urban seasonal ET rates in a semiarid watershed currently undergoing large population growth and rapid urbanization. We used high resolution satellite imagery with a GIS computer model to generate basin-wide ET estimates over a 204-day irrigation season. Six land type samples …
Riparian Zone Evapotranspiration Using Streamflow Diel Signals, Ethan Thomas Geisler
Riparian Zone Evapotranspiration Using Streamflow Diel Signals, Ethan Thomas Geisler
Boise State University Theses and Dissertations
Riparian zones are crucial regions of semi-arid and arid watersheds. In the summer, riparian zones provide an important habitat for the watershed since they have sufficient water supply throughout the year. However, little is known about the impact of riparian zone evapotranspiration (ET) at a watershed scale. The use of streamflow diel signals can provide a more thorough understanding of riparian zone processes, particularly evapotranspiration. The streamflow diel signals were analyzed for Dry Creek Experimental Watershed (DCEW), for the summer of 2014, to determine riparian evapotranspiration. The riparian zone evapotranspiration was compared to a spatially distributed evapotranspiration model to determine …
Using Stable Isotope Hydrology To Partition Evapotranspiration In The Sagebrush Steppe, Kellie Jo Rey
Using Stable Isotope Hydrology To Partition Evapotranspiration In The Sagebrush Steppe, Kellie Jo Rey
Boise State University Theses and Dissertations
Evapotranspiration (ET) is a major part of ecosystem water loss. This thesis aims to develop methods that partition soil water loss into evaporation (E) and transpiration (T). Water balance methods may improve with relative contributions of evaporation (E) and transpiration (T). Isotopic fractionation distinguishes soil water loss due to evaporation from that of plant uptake. This provides a means to assess E and T in retrospect rather than only measuring ET fluxes. To measure the isotopic composition of soil water, we used a liquid-vapor equilibration method following Wassenaar (2008). Experimental trials of different soil amounts and equilibration times were performed …