Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 70 for “"Evapotranspiration (ET)"”.
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Near Real-time Seasonal Drought Forecasting and Retrospective Drought Analysis using Simulated Multi- layer Soil Moisture from Hydrological Models at Sub- Watershed Scales
… and a high-resolution daily soil moisture dataset is obtained at Hydrologic Unit Code (HUC-12) resolution for a period of January 1982 through December 2013. A near real-time hydrologic simulation framework by coupling the calibrated SWAT models with the National Centers for Environmental …
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Remote Sensing Methods To Classify a Desert Wetland
… de Santa Clara is a 5600 ha, anthropogenic wetland in the delta of the Colorado River in Mexico. It is the inadvertent creation of the disposal of brackish agricultural waste water from the U.S. into the intertidal zone of the river delta in Mexico, but has become an internationally important …
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Validation of the aquacrop model for the irrigated african eggplant(solanum macrocarpon) at the UNZA field station
… Eggplant (Solanum macrocarpon) is a minor vegetable crop in most African countries which is currently receiving interest. Given the effects of climate change and decreasing crop water availability, there is need to consider the efficiency of use of the available water. The high dependence on …
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Use of remote sensing to estimate soil salinity and evapotranspiration in agricultural fields
In recent years, methods for detecting soil salinity have improved greatly. This research describes methods to detect soil salinity levels in agricultural lands based on crop conditions and evapotranspiration (ET) using satellite imagery. Elevated levels of soil salinity affect the growth of most …
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Novel water-use strategies of Colorado wetland plants: implications for wetland water loss
In the arid west, there is a tension between wetland restoration and water rights. Wetlands, relied upon by humans and wildlife alike, also contribute significantly to evapotranspiration (ET) due to higher water tables and dense vegetation. It is therefore critical to understand how much water …
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Assessing evapotranspiration rates of a Mid-Atlantic red maple riparian wetland using sap flow sensors.
… the system. Since "edge effects" can enhance evapotranspiration (ET) of exposed trees, ET rates of a first-order red maple riparian wetland were assessed with thermal dissipation probes during the 2002 growing season to address: a) if edge trees transpire more water daily than interior trees, …
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Nighttime evapotranspiration in a semiarid climate using a hemispherical chamber
Nighttime evapotranspiration (ETn) is typically underestimated, miscalculated or ignored when producing daily, seasonal, or annual evapotranspiration (ET) models using energy-balance and aerodynamic conceptual models, such as the Penman-Monteith ET equation. The objective of this study is to …
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Quantifying bottomland hardwood forest and agricultural grassland evapotranspiration in floodplain reaches of a mid Missouri stream
… to protecting human life and property. Enhanced evapotranspiration (ET) of riparian floodplain forests could help reduce flooding through drying of soils and improved absorption of overland flows. Quantifying BHF ET is essential for characterizing hydrological benefits of riparian forest …
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Estimating evapotranspiration from the Amazon Basin using the atmospheric water balance
The spatio-temporal patterns of evapotranspiration (ET) in the Amazon basin are still poorly understood. Field studies in the Amazonian forest have shown that at some sites, deep roots allow trees to sustain elevated transpiration during several months of minimal rainfall, whereas at others, trees …
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Estimation of County-Level Evapotranspiration and Irrigation using High-Resolution Planet Satellite Data
… (BAITSSS) model with high-resolution PlanetScope (Planet) satellite data to the county of Cheyenne, Kansas. The drop of reflectance data observed in fields from Planet satellite data was used as a signal for the first irrigation event, and the model subsequently ran from there. The results …
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A joint analysis of gross primary production and evapotranspiration of Australia using eddy covariance, remote sensing and land surface modelling approaches
… patterns of gross primary production (GPP) and evapotranspiration (ET) across Australian biomes in combination of eddy covariance, remote sensing and land surface model (LSM) methods, taking advantage of their respective applicability on different space and time scales. To do this, I (1) used …
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Recharge dynamics of a perched phreatic aquifer
… and linear-system approaches. Hydrometeorologic and hydrologic data were collected for a 16-month period (4/97 to 8/98) using both manual and automated techniques. Precipitation totaled 135.6 cm and evapotranspiration (ET) calculated using the Penman-Monteith method totaled 107.5 cm. …
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Estimating the Components of a Wetland Water Budget
The design of wetlands to replace those lost to development requires quantitative understanding of the wetland water budget in order to estimate the amount of water available to the wetland over time. Many methods exist to estimate each component of the wetland water budget. In this study, monthly …
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Evaluating a Process-Based Mitigation Wetland Water Budget Model
… water levels is key to the success of created wetlands. The Pierce method is a commonly used technique for modeling and designing mitigation wetlands that assumes minimal groundwater interaction with the wetland. This technique for mitigation wetland design relies primarily on surface water …
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Using a surface energy budget framework to characterize grass-biophysical response to changes in climate in support of on-farm decision making in Ireland
… scheme (LSS) based on a surface energy budget theory, available environmental observations, land surface and atmospheric analyses, to understand essential mechanistic factors that determine grass growth response across the Irish landscape. A soil moisture model parameter (C soil) is …
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Evapotranspiration in Mid-South Rice Production
… use at commercial production scales. Alternate wetting and drying (AWD) is an irrigation practice that provides water savings through the capture of rainfall during periodic drying events during the growing season. The AWD practice also has relevance as a climate change mitigation measure as the …
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Identifying Biophysical Drivers of Evapotranspiration for Forest Cover in a Mountainous Region
Evapotranspiration (ET) is critical for understanding the impacts of climate change and land-use/land-cover change on water availability, ecosystem health, and agricultural productivity. However, point-based, field-measured ET data often lacks sufficient spatial and temporal coverage, especially in …
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Creeping Bentgrass, Kentucky Bluegrass and Tall Fescue Responses to Plant Growth Stimulants Under Deficit Irrigation
… seaweed extract (SWE) + humic acid (HA), glycinebetaine (GB) and a commercial SWE product (PP). The objectives were to determine crop coefficients (K<sub>c</sub>) for creeping bentgrass fairways and tall fescue home lawns, to determine if PGS application allowed for more water conservation, and to …
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Hydrological Analysis of Nicaragua in a Changing Climate
… sensing and gridded data products with a small network of precipitation data with the intended goal of conducting a hydrologic assessment in the tropical country of Nicaragua. The objective of chapter 1 was to find a representative gridded precipitation product that could be distributed across …
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Water resources planning and climate change adaptation strategies of Sardinian basins under water-limited conditions
… to contrasting precipitation regimes, two micrometeorological towers were installed: one in Orroli, a site characterized by shallow basaltic soils, herbaceous vegetation, and wild olive trees; and another in the Marganai forest, a denser holm oak (Quercus ilex) forest on steeper rocky slopes. …
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