Conference proceeding
Phosphorus concentration patterns along the Turkey River floodplains, Iowa
River Flow 2016, pp.190-195
01/01/2016
DOI: 10.1201/9781315644479-34
Abstract
Phosphorus (P) has been identified as a major freshwater pollutant with negative impacts on human and ecological health. In this study we report on the soil total-P depositional patterns along the floodplains of a field site near Spillville, IA, located in an agricultural watershed of the Turkey River (TR). Soil profiles were extracted from the floodplains corresponding to flood levels with various return periods along three surveyed Cross-Sections (CSs) to capture the spatial and vertical P variability. The average soil total-P concentration was 46 mg/kg, with a relatively high Standard Error (S.E.) of 41 mg/kg and concentrations varied with depth and soil texture. Soil total-P was significantly related to the soil particle size, with the strongest positive correlation observed between the total-P and the fine particle sizes (e.g., silt and clay) (rho(FinerParticles) = 0.94; p-value = 0.05), whereas weak negative correlation occurred for the sand percentage (rho(Sand) = -0.92; p-value = 0.05). The soil total-P spatial and vertical depositional patterns revealed that the lower floodplain terraces, in general, are characterized by greater sand contents and thus contained lower total-P concentrations, compared to the upper floodplain terraces. Lower terrace levels are more frequently flooded and the finer particles, along with the attached P, are winnowed away. Therefore, the frequency, magnitude and duration of floods control the soil total-P depositional patterns along the floodplains and determine the duration of the P storage. Upper floodplain terraces act more as long-term storage locations whereas the lower floodplain terraces provide more short-term storage.
Details
- Title: Subtitle
- Phosphorus concentration patterns along the Turkey River floodplains, Iowa
- Creators
- I. Moustakidis - Univ Iowa, IIHR Hydrosci & Engn, Iowa City, IA 52242 USAL. J. Weber - Univ Iowa, IIHR Hydrosci & Engn, Edwin B Green Chair Hydraul, Iowa City, IA USAK. E. Schilling - University of Iowa
- Contributors
- G Constantinescu (Editor)M Garcia (Editor)D Hanes (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- River Flow 2016, pp.190-195
- Publisher
- Crc Press-Balkema
- DOI
- 10.1201/9781315644479-34
- Number of pages
- 6
- Language
- English
- Date published
- 01/01/2016
- Academic Unit
- Earth and Environmental Sciences; IIHR--Hydroscience and Engineering; Civil and Environmental Engineering
- Record Identifier
- 9984383895802771
Metrics
2 Record Views