Determining the Bankfull Discharge Exceedance Potential of Agricultural Ditches in Ohio
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The Ohio State University / OhioLINK
2010
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1262229549 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu12622295492021-08-03T05:58:05Z Determining the Bankfull Discharge Exceedance Potential of Agricultural Ditches in Ohio Kallio, Sara Ellen Agricultural Engineering The two goals of this thesis were to 1) explore methods for developing relationships between discharge and recurrence interval, and predicting flow exceedances - particularly for high frequency recurrence intervals 2) Address site-specific bankfull properties to explore methods to determine whether the proper bankfull elevations are selected. Methods for the first goal of determining recurrence intervals discharges include three temporal data resolutions and three statistical methods. A calibration method was used related regression peak discharge equations to gage discharges and apply the index method to predict discharges at ungaged sites that were examined. A flow duration curve was developed to determine discharge exceedances. Results for goal one revealed that all three statistical methods provided similar 2 to 5-year discharges; however, the tails of the distribution (1-year and 100-years) were different due to the type of statistical method selected and is not uncommon for discharge data with large periods of record. Results for expected recurrence intervals at bankfull discharge corresponds to 25-50% of the 2-year discharge. Flow exceedances determined that the higher frequency discharges had a wide range of flow exceedances with the 0.2-year discharge exceedance values varying from 50 to 170 times per year and the 1-year discharges varying from 1to 13 days per year. Methods used for goal two included a full geomorphic surveyed data completed for all 17 study locations in central Ohio used in goal one. Bankfull channel dimensions were analyzed to regional curves and then grouped based on a threshold of bankfull width. A logistic regression was performed which was used to determine whether sites were properly grouped by bankfull features. Results for goal two provided a quantitative guideline to identify when modification of a ditch to two-stage geometry might establish bankfull dimensions that are consistent with the studied regional curve for ditches in central Ohio. This study also indicated that selection and application of a regional curve may not always establish the expected bankfull dimensions. 2010-01-15 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1262229549 http://rave.ohiolink.edu/etdc/view?acc_num=osu1262229549 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Agricultural Engineering |
| spellingShingle |
Agricultural Engineering Kallio, Sara Ellen Determining the Bankfull Discharge Exceedance Potential of Agricultural Ditches in Ohio |
| author |
Kallio, Sara Ellen |
| author_facet |
Kallio, Sara Ellen |
| author_sort |
Kallio, Sara Ellen |
| title |
Determining the Bankfull Discharge Exceedance Potential of Agricultural Ditches in Ohio |
| title_short |
Determining the Bankfull Discharge Exceedance Potential of Agricultural Ditches in Ohio |
| title_full |
Determining the Bankfull Discharge Exceedance Potential of Agricultural Ditches in Ohio |
| title_fullStr |
Determining the Bankfull Discharge Exceedance Potential of Agricultural Ditches in Ohio |
| title_full_unstemmed |
Determining the Bankfull Discharge Exceedance Potential of Agricultural Ditches in Ohio |
| title_sort |
determining the bankfull discharge exceedance potential of agricultural ditches in ohio |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2010 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1262229549 |
| work_keys_str_mv |
AT kalliosaraellen determiningthebankfulldischargeexceedancepotentialofagriculturalditchesinohio |
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1719428645035966464 |