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 53 for “"Hydrologic processes"”.
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Simulation of hydrologic processes for surface mined lands
… to drive a deterministic model simulating other hydrologic processes. In the second model, a finite difference solution records changes in water content within the soil profile. Root extraction, evaporation, infiltration and percolation are also simulated based upon changing hydraulic head at …
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Aqua.Street.Scapes: Interpreting Natural Hydrologic Processes while Enhancing the Urban Streetscape
This project proposes a new urban aquifer strategy that utilizes stormwater to create a cascading plaza and an improved 'great street' in Washington DC. A system of urban aquifers is developed beneath the surface of the street, perched atop the compacted, impermeable soils below. This set of …
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On evaluating small-scale variations of hydrologic processes in time and space
… focuses on representing the small variations in hydrologic properties at various scales. Numerical experiments are used to explore the effects of the distributions of various hydrologic processes at various scales. The model used in this study is a physically based distributed hydrologic model …
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Surface water-- groundwater interaction : the spatial organization of hydrologic processes over complex terrain
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
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The role of fractional rainfall coverage in atmospheric general circulation model hydrologic processes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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Climatic and hydrologic processes leading to recent wetland losses in Yellowstone National Park, USA
… indicators by integrating catchment-scale hydrologic processes. Wetland drying during the past few decades in Yellowstone National Park's Northern Range has caused concern among National Park managers and the public at large. My research was initiated to develop an understanding of the …
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Modification of the SWAT Model to Simulate Hydrologic Processes in a Karst-influenced Watershed
… some special problems such as alterations to hydrologic regime, contamination of groundwater, ground subsidence, and damage to cave ecosystems. Modeling a karst-influenced watershed can provide a better understanding of the interactions between surface and ground water and how water quality is …
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Assessing and Improving the Representation of Hydrologic Processes in Atmospheric, Ocean, and Land Modeling and Dataset Generation
… throughout the planet that compose the hydrologic cycle, and its movement through these reservoirs requires energy. Thus, water is a key component of the energy balance of the Earth. Despite its importance, its representation in modeling and dataset generation is problematic. Here, the …
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EFFECT OF MAJOR FACTORS ON BIOSWALE PERFORMANCE AND HYDROLOGIC PROCESSES FOR THE CONTROL OF STORMWATER RUNOFF FROM HIGHWAYS
… intensity, and sediment build-up. Hydraulic and hydrological processes were developed and analyzed through conceptual and physical models using appropriate governing equations including the Green-Ampt method. Field study of discrete rainfall events was conducted to collect information to …
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Modeling hydrologic processes associated with soil saturation and debris flow initiation during the September 2013 storm, Colorado Front Range
… soil moisture observations, determine the hydrologic processes behind the preferential saturation of SFS, and to evaluate the importance of soil moisture in determining the debris flow initiation sites. Soil moisture patterns are simulated using the Equilibrium Moisture from Topography, …
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The Role of Geomorphic Features and Hydrologic Processes on Sediment Clusters in Gravel-Bed Rivers, Washington: A Field-Based Approach
… affect the entrainment of sediment under various hydrologic processes will aid in assessment of sediment transport processes, bed stability, and in- stream habitat conditions.</p>
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Impacts of Climate Change in Snowmelt-Dominated Alpine Catchments: Development and Assessment of Comparative Methods to Quantify the Role of Dynamic Storage and Subsurface Hydrologic Processes
… is not well understood. The ability to compare hydrologic processes across space and time is critical to accurately assess the physical and chemical response of headwater systems to climate change. This dissertation builds upon previous work by using long-term data from two snowmelt dominated …
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Omega, modelo de formulação não linear dos processos hidrológicos
Hydrologic models, in general, perform a linearization of non-linear phenomena in such a way that the model becomes a simply parametric and numeric formulation. lnstead of that, OMEGA uses a more consistent mathematical representation of the physical processes in a hydrologic system. OMEGA model is …
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Meteorological Impacts on Streamflow: Analyzing Anthropogenic Climate Change's Effect on Runoff and Streamflow Magnitudes in Virginia's Chesapeake Bay Watershed
… climate change will impact Virginia's hydrologic processes in unforeseen ways in the coming decades. This research describes variability in meteorology (temperature and precipitation) and associated hydrologic processes (evapotranspiration) throughout an ensemble of 31 general …
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A Model for Simulating Soil-Zone Processes at the Regional Scale
… region of the vadose zone where plant and soil processes enhance storage and permeability, providing a fast pathway for water and solutes to streams. The soil zone connects the land surface to the deeper unsaturated and saturated zones. Modeling of soil-zone processes has been used to gain …
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Soil moisture dynamics from satellite observations, land surface modeling, and field data
… moisture variability is essential to understand hydrologic processes at a range of scales. In this study, spatio-temporal variability of soil moisture and inter-comparison among different soil moisture products were analyzed. The variability patterns were well characterized by negative …
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Influence of Climate Variability on Terrestrial Hydrology in North America
… impacts of climate variations on the terrestrial hydrologic processes, ERA-15 dataset (1979--1993) is used to drive LABs for all basins over North America. The anomalies of the model forcing and output are correlated with climate anomalies, such as ENSO, NAO and PNA. It is found that the …
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Soil Heterogeneity in Arid Shrublands: Biotic and Abiotic Processes
… formation begins when depositional or erosional processes cease and a geomorphic surface becomes stable. The transformation of sediment to soil (pedogenesis) affects a multitude of hydrologic processes operating across a range of spatial and temporal scales. At the pore scale (μm-mm), soil …
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From grain to floodplain: evaluating heterogeneity of floodplain hydrostratigraphy using sedimentology, geophysics, and remote sensing
… conductivity, and connectivity. Watershed-scale hydrological models often simplify floodplains by modeling them as largely homogeneous, which inherently overlooks natural floodplain heterogeneity and anisotropy and their effects on hydrologic processes such as groundwater flow and transport and …
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Investigating patterns in stream temperature and restorable alluvial water storage for climate resilience of freshwater habitat for salmon and trout
… Management actions that focus on restoring hydrologic processes can be used to adapt to climate impacts by re-establishing groundwater exchange and cold-water habitats. The formation of cold-water habitat can be promoted by reconnecting rivers to their adjacent floodplains and restoring …
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