Peak-Flow Frequency Analysis for U.S. Geological Survey Streamgage 05481510 Bluff Creek at Pilot Mound, Iowa, in the Des Moines River Basin, Iowa, Based on Data Through Water Year 2021

This data release presents a peak-flow frequency analysis for U.S. Geological Survey streamgage 05481510 Bluff Creek at Pilot Mound, Iowa. The annual peak-flow record at this streamgage consists of both a discrete crest-stage period and a continuous partial-record period. The streamgage, which is in the Des Moines River Basin, is located on 130th Street in Pilot Mound, Iowa. Drainage area at the streamgage is 23.5 square miles. Annual peak-flow data are available for the period 1966-2021. The peak of record, 1,290 cubic feet per second, occurred on June 16, 1990. The annual peak-flow data used in the frequency analysis were downloaded from the U.S. Geological Survey National Water Information System database (U.S. Geological Survey, 2022) and the procedures for the flood frequency analyses are described in Eash and others (2013). The program PeakFQ version 7.4 was used for these analyses; a description of this program can be found in Flynn and others (2006) and Veilleux and others (2014). References Cited: Eash, D.A., Barnes, K.K., and Veilleux, A.G., 2013, Methods for estimating annual exceedance-probability discharges for streams in Iowa, based on data through water year 2010: U.S. Geological Survey Scientific Investigations Report 2013-5086, 63 p. with appendix., http://pubs.usgs.gov/sir/2013/5086/. Flynn, K.M., Kirby, W.H., and Hummel, P.R., 2006, User?s Manual for Program PeakFQ Annual Flood-Frequency Analysis Using Bulletin 17B Guidelines: U.S. Geological Survey, Techniques and Methods Book 4, Chapter B4; 42 pgs., accessed on July 1, 2022, at https://pubs.usgs.gov/tm/2006/tm4b4/tm4b4.pdf. U.S. Geological Survey, 2022, USGS water data for the Nation: U.S. Geological Survey National Water Information System database, accessed September 12, 2022, at https://doi.org/10.5066/F7P55KJN. [Site information directly accessible at https://waterdata.usgs.gov/nwis/inventory/?site_no=05481510&agency_cd=USGS&]. Veilleux, A.G., Cohn, T.A., Flynn, K.M., Mason, R.R., Jr., and Hummel, P.R., 2014, Estimating magnitude and frequency of floods using the PeakFQ 7.0 program: U.S. Geological Survey Fact Sheet 2013?3108, 2 p., https://doi.org/10.3133/fs20133108.

本数据集发布针对美国爱荷华州派洛特芒德的布拉夫溪05481510号美国地质调查局（U.S. Geological Survey，USGS）河流测流站（streamgage）开展了洪峰流量频率分析。该测流站的年最大洪峰流量序列同时包含离散峰顶水位时段与连续部分记录时段。此测流站位于得梅因河流域，地处爱荷华州派洛特芒德的130号街道，控制流域面积为23.5平方英里。年最大洪峰流量数据的观测时段为1966年至2021年，该测站的历史最大洪峰流量为1290立方英尺每秒，发生于1990年6月16日。
本次频率分析所用的年最大洪峰流量数据下载自美国地质调查局国家水信息系统数据库（2022），洪水频率分析的具体流程详见Eash等人（2013）的研究。本次分析采用PeakFQ 7.4版本程序完成，该程序的详细说明可参考Flynn等人（2006）与Veilleux等人（2014）的文献。
引用文献：
Eash, D.A.、Barnes, K.K. 及 Veilleux, A.G., 2013, 《基于截至2010水文年的观测数据估算爱荷华州河流年超概率流量的方法》：美国地质调查局科学调查报告2013-5086，共63页（含附录），http://pubs.usgs.gov/sir/2013/5086/。
Flynn, K.M.、Kirby, W.H. 及 Hummel, P.R., 2006, 《PeakFQ程序用户手册：基于Bulletin 17B指南的年度洪水频率分析》：美国地质调查局技术与方法丛书第4卷B4章，共42页，2022年7月1日访问于https://pubs.usgs.gov/tm/2006/tm4b4/tm4b4.pdf。
美国地质调查局（U.S. Geological Survey）, 2022, 《美国全国水数据：美国地质调查局国家水信息系统数据库》，2022年9月12日访问于https://doi.org/10.5066/F7P55KJN。[站点信息可直接访问：https://waterdata.usgs.gov/nwis/inventory/?site_no=05481510&agency_cd=USGS&]
Veilleux, A.G.、Cohn, T.A.、Flynn, K.M.、Mason, R.R. Jr. 及 Hummel, P.R., 2014, 《采用PeakFQ 7.0程序估算洪水量级与频率》：美国地质调查局情况说明书2013-3108，共2页，https://doi.org/10.3133/fs20133108。