An Investigation of the Geomorphology and Flooding Characteristics of a Small Stream in the Upper Big Walnut Creek Watershed, Ohio PDF Download
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Author: Beth Ellen Fry Publisher: ISBN: Category : Floods Languages : en Pages : 268
Book Description
Abstract: The objectives pertaining of this study were to 1) characterize the geomorphology of the headwaters of Sugar Creek (a tributary of the Upper Big Walnut Creek), 2) evaluate methods for relating recurrence intervals to discharge on the ungaged stream, and 3) to determine the frequency and magnitude of annual out of bank discharge at various locations along the stream. The bankfull discharge characteristics of Sugar Creek were analyzed with a regional curve analysis; the Rosgen Classification System, and an analysis of the threshold particle size. The three methods for estimating recurrence interval discharges of ungaged streams included two uncalibrated landscape models and estimates calibrated with USGS data from a downstream gage. HEC-HMS and HECRAS modeling programs were used to develop discharge recurrence interval relationships for selected locations along Sugar Creek. The frequencies associated with recurrence interval discharges, in times per year, were estimated with a time duration analysis and the average annual volume of overbank flows, as a percent of the total flow, utilized a combination of the generated flow hydrographs and the frequencies associated with recurrence interval discharges. Sugar Creek was a stable system, or in dynamic equilibrium, and had an extensive floodplain with entrenchment ratios ranging from 2 to 18. A calibrated method for estimating recurrence interval discharges was selected and used to estimate the average annual frequency and volume of overbank flows. Among eight locations focused on in the study, 38% experienced bankfull or larger discharges an average of 12 times per year, with about a 0.2-year recurrence interval for the bankfiill discharge. Seventy-five percent of the locations experienced bankfull or larger discharges an average of at least 3 times per year, with about a 0.8-year recurrence interval. Eighty-eight percent the locations, experienced out of bank flows at least 1 time per year, with about a 1.6-year recurrence interval. All of the locations experienced out of bank flows an average of at least 1 time per year, with the 2-year recurrence interval discharge. Out of bank flows ranged from 0.4% to 13% of the average annual flow volume. Based on the results of this study, it was recommended that further research be conducted in the Sugar Creek watershed to quantify the water quality benefits within the floodplain, as well as the benefits of a stable stream.
Author: Beth Ellen Fry Publisher: ISBN: Category : Floods Languages : en Pages : 268
Book Description
Abstract: The objectives pertaining of this study were to 1) characterize the geomorphology of the headwaters of Sugar Creek (a tributary of the Upper Big Walnut Creek), 2) evaluate methods for relating recurrence intervals to discharge on the ungaged stream, and 3) to determine the frequency and magnitude of annual out of bank discharge at various locations along the stream. The bankfull discharge characteristics of Sugar Creek were analyzed with a regional curve analysis; the Rosgen Classification System, and an analysis of the threshold particle size. The three methods for estimating recurrence interval discharges of ungaged streams included two uncalibrated landscape models and estimates calibrated with USGS data from a downstream gage. HEC-HMS and HECRAS modeling programs were used to develop discharge recurrence interval relationships for selected locations along Sugar Creek. The frequencies associated with recurrence interval discharges, in times per year, were estimated with a time duration analysis and the average annual volume of overbank flows, as a percent of the total flow, utilized a combination of the generated flow hydrographs and the frequencies associated with recurrence interval discharges. Sugar Creek was a stable system, or in dynamic equilibrium, and had an extensive floodplain with entrenchment ratios ranging from 2 to 18. A calibrated method for estimating recurrence interval discharges was selected and used to estimate the average annual frequency and volume of overbank flows. Among eight locations focused on in the study, 38% experienced bankfull or larger discharges an average of 12 times per year, with about a 0.2-year recurrence interval for the bankfiill discharge. Seventy-five percent of the locations experienced bankfull or larger discharges an average of at least 3 times per year, with about a 0.8-year recurrence interval. Eighty-eight percent the locations, experienced out of bank flows at least 1 time per year, with about a 1.6-year recurrence interval. All of the locations experienced out of bank flows an average of at least 1 time per year, with the 2-year recurrence interval discharge. Out of bank flows ranged from 0.4% to 13% of the average annual flow volume. Based on the results of this study, it was recommended that further research be conducted in the Sugar Creek watershed to quantify the water quality benefits within the floodplain, as well as the benefits of a stable stream.
Author: National Research Council Publisher: National Academies Press ISBN: 0309082951 Category : Science Languages : en Pages : 449
Book Description
The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.
Author: Blake Gumprecht Publisher: JHU Press ISBN: 9780801866425 Category : Architecture Languages : en Pages : 390
Book Description
Winner of the J. B. Jackson Prize from the Association of American Geographers Three centuries ago, the Los Angeles River meandered through marshes and forests of willow and sycamore. Trout spawned in its waters and grizzly bears roamed its shores. The bountiful environment the river helped create supported one of the largest concentrations of Indians in North America. Today, the river is made almost entirely of concrete. Chain-link fence and barbed wire line its course. Shopping carts and trash litter its channel. Little water flows in the river most of the year, and nearly all that does is treated sewage and oily street runoff. On much of its course, the river looks more like a deserted freeway than a river. The river's contemporary image belies its former character and its importance to the development of Southern California. Los Angeles would not exist were it not for the river, and the river was crucial to its growth. Recognizing its past and future potential, a potent movement has developed to revitalize its course. The Los Angeles River offers the first comprehensive account of a river that helped give birth to one of the world's great cities, significantly shaped its history, and promises to play a key role in its future.
Author: Nicole A. Davis Publisher: Texas A&M University Press ISBN: 1623492556 Category : Nature Languages : en Pages : 234
Book Description
Riparian areas—transitional zones between the aquatic environments of streams, rivers, and lakes and the terrestrial environments on and alongside their banks—are special places. They provide almost two hundred thousand miles of connections through which the waters of Texas flow. Keeping the water flowing, in as natural a way as possible, is key to the careful and wise management of the state’s water resources. Texas Riparian Areas evolved from a report commissioned by the Texas Water Development Board as Texas faced the reality of over-allocated water resources and long-term if not permanent drought conditions. Its purpose was to summarize the characteristics of riparian areas and to develop a common vocabulary for discussing, studying, and managing them. To learn more about The Meadows Center for Water and the Environment, sponsors of this book's series, please click here.
Author: Beth Ellen Fry
Author: Beth Ellen Fry
Author: 
Author: James F. Coles
Author: National Research Council
Author: 
Author: Blake Gumprecht
Author: Sharon E. Kroening
Author: Joachim Toby Tourbier
Author: George Sabo
Author: Nicole A. Davis