Computing daily mean streamflow at ungaged locations in Iowa by using the Flow Anywhere and Flow Duration Curve Transfer statistical methods

Linhart, S. Mike; Nania, Jon F.; Sanders, Curtis L.; Archfield, Stacey A.

doi:10.3133/sir20125232

Cited by 12 publications

(15 citation statements)

References 15 publications

(18 reference statements)

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“…Annual mean Q as measured at the USGS stream gauge near the outlet of Clear Creek for 1980–2012 was 2.35 ± 1.78 m 3 s −1 (USGS 05454300). Q at the ungaged locations was estimated by using a variation of the “Flow Anywhere” method developed by Linhart et al (2012), where the drainage‐area‐ratio method is modified to regionalize equations for Iowa. The equation developed for aggregated region 3 was used to estimate Q at the US‐SAC and US‐HST and the USGS Oxford location as the reference gauge.…”

Section: Methodsmentioning

confidence: 99%

Antecedent Moisture Controls on Stream Nitrate Flux in an Agricultural Watershed

et al. 2014

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Evaluating nitrate-N fluxes from agricultural landscapes is inherently complex due to the wide range of intrinsic and dynamic controlling variables. In this study, we investigate the influence of contrasting antecedent moisture conditions on nitrate-N flux magnitude and dynamics in a single agricultural watershed on intra-annual and rainfall-event temporal scales. High temporal resolution discharge and nitrate concentration data were collected to evaluate nitrate-N flux magnitude associated with wet (2009) ) were observed during the drought conditions of 2012, consistent with a quickflow-dominated response to rain events and infiltration/ storage of precipitation resulting in discharge < precipitation. Nitrate-N loads and yields from the watershed were much higher (up to an order of magnitude) in the wet year vs. the dry year. Our results suggest that the response of nitrate-N loading to rain events is highly dependent on intra-annual antecedent moisture conditions and subsurface hydrologic connectivity, which together dictate the dominant hydrologic pathways for stream recharge. Additionally, the results of our study indicate that continued pronounced wet/dry cycles may become more dominant as the short-term driver of future nitrate-N exports.

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Section: Methodsmentioning

confidence: 99%

Antecedent Moisture Controls on Stream Nitrate Flux in an Agricultural Watershed

et al. 2014

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“…A mean hourly discharge time series was utilized to best capture rapid stormflow peaks characteristic of Walnut Creek's flashy hydrology. Mean hourly discharges were scaled from the watershed outlet gauging station to individual cross sections using discharge-drainage area relations (Biedenharn et al, 2000;Linhart et al, 2012). Discharge-drainage area estimates of cross-section discharge were validated using the FDC of Walnut Creek's upstream gauging station.…”

Section: Hec-ras Modelsmentioning

confidence: 99%

Changes in lateral floodplain connectivity accompanying stream channel evolution: Implications for sediment and nutrient budgets

Beck

Moore

Schilling

et al. 2019

Science of The Total Environment

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Floodplain storage commonly represents one of the largest sediment fluxes within sediment budgets. In watersheds responding to large scale disturbance, floodplain-channel lateral connectivity may change over time with progression of channel evolution and associated changes in channel geometry. In this study we investigated the effects of channel geometry change on floodplain inundation frequency and flux of suspended sediment (SS) and total phosphorus (TP) to floodplain storage within the 52.2 km2 Walnut Creek watershed (Iowa, USA) through a combination of 25 in-field channel cross section transects, hydraulic modeling (HEC-RAS), and stream gauging station-derived water quality and quantity data. Cross sectional area of the 25 in-field channel cross sections increased by a mean of 17% over the 16 year study period (1998-2014), and field data indicate a general trend of degradation and widening to be present along Walnut Creek's main stem. Estimated stream discharge required to generate lateral overbank flow increased 15%, and floodplain inundation volume decreased by 37% over study duration. Estimated annual fluxes of SS and TP to floodplain storage decreased by 61 and 62% over study duration, respectively. The estimated reductions in flux to floodplain storage have potential to increase watershed export of SS and TP by 9 and 18%, respectively. Increased contributions to SS and TP export may continue as channel evolution progresses and floodplain storage opportunities continue to decline. In addition to loss of storage, higher discharges confined to the channel may have greater stream power, resulting in further enhancement of SS and TP export through accelerated bed and bank erosion. These increased contributions to watershed loads may mask SS and TP reductions achieved through edge of field practices, thus making it critical that stage and progression of channel evolution be taken into consideration when addressing sediment and phosphorus loading at the watershed scale.

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“…Since there are no USGS stream gages present within the Soap Creek Watershed, we used Flow Anywhere and Flow Duration Curve Transfer Statistical Methods, which were developed by USGS in cooperation with the Iowa Department of Natural Resources, to compute daily mean streamflow at ungaged locations. The Flow Anywhere statistical method is a variation of the drainage-area-ratio method, which transfers same-day streamflow information from a reference streamgage to another location by using the daily mean streamflow at the reference streamgage and the drainage-area ratio of two locations (Linhart et al, 2012).…”

Section: Parameters Assigned In Hec-hmsmentioning

confidence: 99%

Hydrologic and hydraulic model development for flood mitigation and routing method comparison in Soap Creek Watershed, Iowa

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Computing daily mean streamflow at ungaged locations in Iowa by using the Flow Anywhere and Flow Duration Curve Transfer statistical methods

Cited by 12 publications

References 15 publications

Antecedent Moisture Controls on Stream Nitrate Flux in an Agricultural Watershed

Antecedent Moisture Controls on Stream Nitrate Flux in an Agricultural Watershed

Changes in lateral floodplain connectivity accompanying stream channel evolution: Implications for sediment and nutrient budgets

Hydrologic and hydraulic model development for flood mitigation and routing method comparison in Soap Creek Watershed, Iowa

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