The management and protection of National Wildlife Refuges (NWRs) requires local and regional inventories and assessments for the biological, physical, chemical, and hydrologic resources of each unit. Water resource Inventories and Assessments (WRIAs) are compiled by the U.S. Fi…
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As major conduits for both water and sediment, rivers are responsible for shaping much of Earth's surface. The river morphology we observe today is result of complex interaction between geology, tectonics, climate, and erosion over time, an evolution that is recorded in sediment…
Growing food demand has been the primary cause of increasingly unsustainable water consumption in the world’s breadbasket regions. This unsustainable demand can have steep human and environmental consequences, leading to physical and economic hardship among vulnerable communitie…
For more than a century, a large volume of gold-mining tailings was deposited in Whitewood Creek and the Belle Fourche River, tributaries to the Cheyenne River in western South Dakota. Much of it still remains, and field and historical evidence indicates continued remobilization…
The combination of 10 years of drought in the Chilean Andes and an increased demand water supply and agricultural activities has created the need for better forecasts to inform water management and decision making. The existing water supply forecasts have been insufficient for t…
Fresh water resources are critical for daily human consumption. Therefore, a continuous monitoring effort over their quantity and quality is instrumental. One important model for water quantity monitoring is the rainfall-runoff model, which represents the response of a watershed…
The dynamic nature of erosion and associated processes and their dependence on climatic, pedological, land cover, land use, and management factors result in spatial and temporal variability. Computing and mapping this variability will produce information which is essential for d…
Investigation of the behavior of volatile organic contaminants in the unsaturated zone requires a thorough understanding of vapor transport processes. Most previous modeling efforts have assumed that molecular diffusion is the chief transport mechanism in unsaturated soil system…
A detailed geological map of scale 1:150,000 of Wadi Al-Miyah area was constructed on the basis of LANDSAT-TM images. An electrical resistivity model was constructed to determine the thickness of the various hydrogeologic units. Correlation of the resistivity model with the stra…
In Morocco, agriculture is still empirical and most of the farmer's practices are inherited from colonization. Present Moroccan farming systems limit the opportunity to leave crop residue on the soil surface, which could help to conserve soil and water. Agricultural residues hav…
The environmental impact of agricultural activities on water quality was studied on two sub-watersheds of the L'Assomption river in Quebec, over a 3 year period. The sub-watersheds studied were the Saint Esprit (26.1 km 2) and Desrochers (17.9 km2). Development of a methodology …
Event/pre-event water partitioning, water residence times and stormflow pathways were examined in a paired basin comparison of adjacent forested control (SB32) and clearcut (SB31) basins during the 2001 spring snowmelt at the Turkey Lakes Watershed (TLW). TLW is located approxim…
The subject of this Ph.D. dissertation is the stochastic modeling of daily flows. The principal objective, which we have pursued throughout our work, is to perfect a daily flow simulation model capable of representing the way in which sahelian hydrographic networks function hydr…
The field hydrology model DRAINMOD was modified to include freezing and thawing, and snowmelt components. Based on daily hydrological predictions of the original model, the modified DRAINMOD numerically solves the heat flow equation to predict soil temperature. When freezing con…
Field and remote sensing observations demonstrate that depressions of the Western Desert of Egypt (specifically, Kharga, Farafra, and Kurkur regions) are mainly occupied by shales that are impermeable, but easily erodible by rainfall and runoff, whereas the surrounding plateaus …
Groundwater and streams are closely integrated in the hydrologic cycle in which they interact in a wide variety of physiographic and climatic landscapes. Consequently, the study of interactions between groundwater and streams has been an important issue for water resources manag…
Groundwater remediation is widely recognized as technologically challenging. As remediation technologies shift to natural attenuation or in-situ bioremediation, advances in understanding and engineering for the subsurface system are necessary. Biodegradation rates can be limited…
The goal of this study is to investigate the sensitivity of climate to changes in the area and location of surface waters (lakes and wetlands). A model (SWAM) is developed to predict surface water area and river transport globally. SWAM is based on a linear reservoir hydrologic …