scholarly journals Regional flow duration curves for ungauged sites in Sicily

2010 ◽  
Vol 7 (5) ◽  
pp. 7059-7078
Author(s):  
F. Viola ◽  
L. V. Noto ◽  
M. Cannarozzo ◽  
G. La Loggia
Keyword(s):  
Water Allocation ◽  
Water Quality Assessment ◽  
Regression Equations ◽  
Large Dataset ◽  
Flow Duration ◽  
Ungauged Sites ◽  
Regional Flow ◽  
Streamflow Data ◽  
Flow Duration Curves ◽  
Gauged Basins

Abstract. Flow duration curves are simple and powerful tools to deal with many hydrological and environmental problems related to water quality assessment, water-use assessment and water allocation. Unfortunately the scarcity of streamflow data enables the use of these instruments only for gauged basins. A regional model is developed here for estimating flow duration curves at ungauged basins in Sicily, Italy. Due to the complex ephemeral behaviour of the examined region, this study distinguishes dry periods, when flows are zero, from wet periods using a three parameters power law to describe the frequency distribution of flows. A large dataset of streamflows has been analysed and the parameters of flow duration curves have been derived for about fifty basins. Regional regression equations have been developed to derive flow duration curves starting from morphological basin characteristics.

scholarly journals Regional flow duration curves for ungauged sites in Sicily

2011 ◽  
Vol 15 (1) ◽  
pp. 323-331 ◽  
Author(s):  
F. Viola ◽  
L. V. Noto ◽  
M. Cannarozzo ◽  
G. La Loggia
Keyword(s):  
Water Allocation ◽  
Water Quality Assessment ◽  
Regression Equations ◽  
Large Dataset ◽  
Flow Duration ◽  
Ungauged Sites ◽  
Regional Flow ◽  
Streamflow Data ◽  
Flow Duration Curves ◽  
Gauged Basins

Abstract. Flow duration curves are simple and powerful tools to deal with many hydrological and environmental problems related to water quality assessment, water-use assessment and water allocation. Unfortunately the scarcity of streamflow data enables the use of these instruments only for gauged basins. A regional model is developed here for estimating flow duration curves at ungauged basins in Sicily, Italy. Due to the complex ephemeral behavior of the examined region, this study distinguishes dry periods, when flows are zero, from wet periods using a three parameters power law to describe the frequency distribution of flows. A large dataset of streamflows has been analyzed and the parameters of flow duration curves have been derived for about fifty basins. Regional regression equations have been developed to derive flow duration curves starting from morphological basin characteristics.

Regional flow-duration curves: reliability for ungauged basins

2004 ◽  
Vol 27 (10) ◽  
pp. 953-965 ◽  
Author(s):  
Attilio Castellarin ◽  
Giorgio Galeati ◽  
Luigia Brandimarte ◽  
Alberto Montanari ◽  
Armando Brath
Keyword(s):  
Ungauged Basins ◽  
Flow Duration ◽  
Regional Flow ◽  
Flow Duration Curves

Hydrologic design methodologies for prefeasibility studies of small-scale hydro at ungauged sites

1988 ◽  
Vol 15 (3) ◽  
pp. 289-298
Author(s):  
David G. Judge ◽  
James E. Anderson ◽  
Bruce I. McClennan ◽  
Eon T. Park
Keyword(s):  
Small Scale ◽  
Hydroelectric Power ◽  
Flow Curves ◽  
Flow Duration ◽  
Ungauged Sites ◽  
Project Costs ◽  
Flow Duration Curves ◽  
Hydrologic Design ◽  
Electrical Generation ◽  
The Cost

Hydrologic variables such as available flow for electrical generation and its time distribution, together with flood magnitudes, represent the basis for evaluation of potential hydro sites. Economic viability, especially for small-scale hydro sites is very sensitive to these basic hydrologic variables. Unfortunately, many potential small-scale hydro sites are located on ungauged streams and often the cost of deriving the necessary site specific hydrologic information for design is prohibitive in relation to overall project costs. Therefore, regional techniques have been developed for evaluating the necessary hydrologic variables at a prefeasibility level for small-scale ungauged sites anywhere in Canada. Studies concerned with developing regional techniques for application to feasibility level evaluations have been completed for Atlantic Canada, British Columbia, and Ontario.The methodology can be used to estimate the flow duration curve and the turbinable flow curve for ungauged streams. Equations relating characteristics of the curves to physiographic and climatic parameters have been derived for eleven regions across Canada. An example demonstrating application of the new methodology is included. Key words: hydroelectric power, small-hydro, regional hydrology, ungauged streams, flow duration curves, turbinable flow curves.

scholarly journals Estimation of regional flow-duration curves for Indiana and Illinois

2014 ◽  
Author(s):  
Thomas M. Over ◽  
James D. Riley ◽  
Jennifer B. Sharpe ◽  
Donald V. Arvin
Keyword(s):  
Flow Duration ◽  
Regional Flow ◽  
Flow Duration Curves

scholarly journals A methodology to estimate flow duration curves at partially ungauged basins

2020 ◽  
Vol 24 (4) ◽  
pp. 2043-2060
Author(s):  
Elena Ridolfi ◽  
Hemendra Kumar ◽  
András Bárdossy
Keyword(s):  
Time Window ◽  
Donor Site ◽  
Main Idea ◽  
Weather Conditions ◽  
Target Time ◽  
Flow Duration ◽  
The Usa ◽  
Flow Duration Curves ◽  
A Site ◽  
Gauged Basins

Abstract. The flow duration curve (FDC) of streamflow at a specific site has a key role in the knowledge on the distribution and characteristics of streamflow at that site. The FDC gives information on the water regime, providing information to optimally manage the water resources of the river. In spite of its importance, because of the lack of streamflow gauging stations, the FDC construction can be a not straightforward task. In partially gauged basins, FDCs are usually built using regionalization among the other methods. In this paper we show that the FDC is not a characteristic of the basin only, but of both the basin and the weather. Different weather conditions lead to different FDCs for the same catchment. The differences can often be significant. Similarly, the FDC built at a site for a specific period cannot be used to retrieve the FDC at a different site for the same time window. In this paper, we propose a new methodology to estimate FDCs at partially gauged basins (i.e., target sites) using precipitation data gauged at another basin (i.e., donor site). The main idea is that it is possible to retrieve the FDC of a target period of time using the data gauged during a given donor time period for which data are available at both target and donor sites. To test the methodology, several donor and target time periods are analyzed and results are shown for different sites in the USA. The comparison between estimated and actually observed FDCs shows the reasonability of the approach, especially for intermediate percentiles.

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