A review is given of the general features of fluvial landscapes and sediments, and of the soil forming factors and processes occurring in this environment. The effect of wet paddy cultivation on soil formation is also outlined. The fluvial soils of the paddy growing areas of the…
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The Nawalparasi district of Nepal lies in the headwaters of the South Asian Arsenic Crisis region, therefore, offers important insight into the arsenic mobilization process. This research characterizes temporal arsenic variability and other hydrologic parameters at 10 monitoring…
Northern peatlands have accumulated approximately one third of all soil carbon (C) and therefore play an important role in the global C cycle. Besides the C sink function, peatlands are one of the largest biological sources of atmospheric methane (CH4) and represent approximatel…
The geochemistry of naturally occurring arsenic (As) has been investigated in the surface waters and ground waters of the shallow alluvial aquifers of the Humboldt River Basin (HRB) in northern Nevada using laboratory experiments, geochemical reaction path modeling, and statisti…
In the context of the SERVIR-Africa project, the SERVIR Arizona Team is developing streamflow forecast systems on African basins using Satellite Precipitation Products (SPP) to drive the models. These products have errors that need to be addressed before using them to drive hydr…
We hypothesized that just as pulsed flow improves cleaning of grooved surfaces in several manufacturing procedures, rapidly pulsed pumping (with a period on the order of a second rather than weeks or months) in pump-and-treat groundwater remediation would boost the diffusion-lim…
There is growing evidence that outbreaks of several water-related diseases are potentially predictable by using satellite derived macro-scale environmental variables. This research addresses cholera, which one of the most prevalent water-related infections in the tropical region…
This thesis develops two statistical models to predict Ganges river discharge at Hardinge Bridge in Bangladesh near India/Bangladesh border using only the previous local flow and upstream rainfall. Current operational flood forecasting in Bangladesh provides no more than 3-day l…
Twentieth century climate change induced by anthropogenic forcings has been recognized as one of the most serious issues affecting the development of mankind. Impacts of climate change on hydrologic processes are highly relevant to human activities and draw a great deal of scien…
Global climate is predicted to have significant impacts on the chemical, biological, and physical characteristics of wetlands and the watersheds in which they are contained. In particular, climate prediction models suggest a significant increase in extreme precipitation events -…
Land use and land cover changes have been impacting the hydrologic processes of coastal-plain watersheds of the southeastern United States. To better understand effects of land use change on these watershed processes, it is critical to understand the groundwater and surface-wate…
Part A: Water use for human needs has increased dramatically all over the world, in response to tremendous population and economic growth. In the United States alone, water consumption increased over ten-fold during the twentieth century. While the increase in water use efficien…
East Iowa experienced large flooding during June of 2008. This study used Cuencas hydrological model to simulate the discharges of June 2008 at Eldorado and Elkader, in the Turkey River Watershed, in North East Iowa. The results of this study were used to test the performance of…
Soil erosion by water is a serious issue in Afghanistan. Due to the geographic landscape, soil and climatic conditions, and the latest deforestation activities, there has been intensive soil erosion which has resulted in prolonged and great impact on social and economic developm…
Groundwater has an important role in forging the composition of surface water, supplying nutrients crucial for the development of balanced ecosystems and potentially introducing contaminants into otherwise pristine surface water. Due to water-rock interactions, radium (Ra) in gr…
The global supply of freshwater depends on spatial and temporal factors. Because of its nature, there are parts of the world where sufficient amounts are simply not available. With the onset of global climate change and unpredictable politics in some areas, what is referred to a…