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Hydrology Days

Permanent URI for this collectionhttps://hdl.handle.net/10217/200830

Each year the American Geophysical Union Hydrology Days meeting brings together water scientists, researchers and students to discuss the current state of the science and latest water-related research findings. This digital collection includes proceedings/papers from 2003 to 2018, and programs and abstracts from 2019 to current. Proceedings from 2019 to current are published in issues of Colorado Water.

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Browsing Hydrology Days by Author "Arbeláez, Ana C., author"

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    Bankfull discharge in mountain streams in the Cauca Region of Colombia
    (Colorado State University. Libraries, 2007) Arbeláez, Ana C., author; Guevara, María Elvira, author; Posada, Lillian, author; González, Luís Jorge, author; Gallardo, Carlos A., author; Colorado State University, publisher
    A flow considered effective or dominant in the process of stable channel forming, is the bankfull discharge associated to frequency between 1 and 2 years with an average of 1.5 year, according to Dunne and Leopold, 1978. Bankfull discharge or forming discharge is the flow which defines the morphological characteristics of the channel such as bars, meanders and curves. In this article, different approximations for channel forming discharge are explored from the morphological and statistical point of view, in order to establish the frequency of the forming discharge for some rivers in the Andes Region of the Department of Cauca, Colombia.
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    Low flow discharges regional analysis using Wakeby distribution in an ungauged basin in Colombia
    (Colorado State University. Libraries, 2007) Arbeláez, Ana C., author; Castro, Lina M., author; Colorado State University, publisher
    In order to estimate low flow return periods for an ungaged watershed in Colombia, a regional analysis of low flow discharges was performed using the Wakeby probability distribution function. This distribution is more flexible than other distributions and separates the distribution's extreme tails; these are advantages for modeling flow discharges. A procedure for estimating the parameters of the distribution is also presented. The frequency analysis results of 18 to 36 long time series is shown. The goodness of fit test was evaluated with the Graphic Correlation Coefficient (GCC), the Standard Error of Fitting (SEF) and the Graphic Test; they were useful tools for testing the best fit with Wakeby distribution, which was better than LogNormal II and Gumbel distribution. The Index Flood Method for Regional Frequency Analysis was applied with Wakeby distribution and the discharge was standardized with the area. Discussions and conclusions are presented.
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    Regime equations for mountain streams in the Cauca Region of Colombia
    (Colorado State University. Libraries, 2007) Arbeláez, Ana C., author; Guevara, María Elvira, author; Posada, Lillian, author; González, Luís Jorge, author; Gallardo, Carlos A., author; Colorado State University, publisher
    Knowledge of the dimensions of a stable stream channel during a specific period of time and of its corresponding forming discharge allows determining parameters of regime equations for a region, which enhance the design of channels in other zones with similar characteristics. Nowadays, the state-of-the-art for regime channel does not include the typical streams of the Department of Cauca characterized by relative steep slopes, high annual precipitation in the order of 2500 – 3000 mm, high discharge and varied geology. In this article, we present regime type expressions obtained from a research done in mountain streams of the Department of Cauca, Colombia.