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Archives: Portfolios

Cost-Effectiveness of Reverse Auctions for Watershed Nutrient Reductions in the Presence of Climate Variability

The Intergovernmental Panel on Climate Change (IPCC) has predicted that changes in climate patterns (higher temperatures, changes in extreme precipitation events, higher level of humidity) will adversely impact water quality.
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Development of a Framework for Discharge Forecasting Over Iowa

Iowa is plagued by catastrophic natural hazards on a yearly basis, with the 2008 flood and the 2012 drought being two of the most recent extreme events affecting our state.
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Validation of Satellite Observations of Soil Moisture to Facilitate Forecasts of Soil Water Storage in Iowa

Soil moisture is the reservoir of water that supports agriculture. Soil moisture also affects the amount and variability of precipitation and hence the occurrence of drought. Remote sensing satellites that
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The role of Iron Mobility From Anoxic Sediments in Stimulating Harmful Algal Blooms

2015 was a record year for the occurrence of harmful algal blooms (HABs) on Iowa lakes. HABs are a nuisance and public health issue, producing toxins that affect the safety
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Evaluation of Subsurface Drainage on P Losses in the Black Hawk Lake Watershed, Iowa

Nutrient enrichment is a critical issue affecting Iowa surface water bodies. The Upper Midwestern United States is heavily drained and subsurface drainage provides a direct pathway for nutrients to enter
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Validation of Satellite Observations of Soil Moisture to Facilitate Forecasts of Soil Water Storage in Iowa

This project completes the final three months of a two year project. Soil moisture is the reservoir of water that supports agriculture. Soil moisture also affects the amount and variability
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Quantifying the Role of Soils in Salinization: Winter Road Maintenance Impacts to Runoff and Right-of-Way

This study applies new approaches to understand the fate of soluble pollutants in the urban environment. Soil samples collected during warm season months as part of this field study compliment
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Simulation of Watershed-Scale Nitrate Transport in Fractured Till Using Upscaled Parameters Obtained from Till Core

Nitrate contamination from agriculture is a major water-quality problem in Iowa and a contributor to hypoxia in the Gulf of Mexico. In Iowa’s till-dominated watersheds, previous studies on nitrate transport
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Enhancing Phosphate Removal in Woodchip Bioreactors

Nutrient enrichment of Iowa’s water bodies is one of the most critical issues the state is currently facing. Intensive farming and heavy nutrient application in the Midwest coupled with an
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Spatial Potential for Enhanced In-field Denitrification from Perennial Vegetative Filter Strips

Iowa’s waterways receive excessive nitrogen from agricultural lands. This project aims to identify the spatial specifics of a conservation practice that has demonstrated abilities to promote denitrification within agricultural fields,
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