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| Titel |
Estimations of discharge values for purposes of surface runoff and sediment transport off-site effects assessment |
| VerfasserIn |
Vaclav David, Tereza Davidova |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250081551
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| Zusammenfassung |
| Many studies dealing with the assessment of increased sediment transport and runoff
off-site effects are facing the problem sourcing from the lack of input data. This is
often the problem of studies which are focused on the assessment of large areas
whereas it can be calculated by widely used methods or models in case of small areas.
The procedure for the calculation of values such as average discharges or peak
discharge values is very dependent on the input data availability. Of course, the
procedure must reflect the type of values which have to be estimated. It is rather
different when calculating peak discharge values than when calculating average
discharges.
This poster focuses on both the average discharge and peak discharge value estimations
using different procedures. Average discharges were calculated as a necessary input for the
calculation of sediment trap efficiency in reservoirs which is a part of complex solution
within the project NAZV QI102265 “Assessment of soil erosion and phosphorus loads
causing eutrophication of stagnant water bodies”. Values of average discharges are
also used for the classification of extinct pond areas which is solved within the
project NAZV KUS QJ1220233 “Assessment of former pond systems with aim to
achieve sustainable management of water and soil resources in the Czech Republic”.
Estimation of peak discharge values are the aim of the project COST LD11031 “Flood
characteristics of small catchments” in which a new estimation procedure is being
developed.
In both cases the GIS is a necessary tool for the calculation. In the first case, (calculation
of average discharges) only the average discharge values in given profiles were used as an
input for the calculation which is based on the interpolation of specific runoff values over the
analysed area. In the second case, more physic-geographic parameters are taken into
consideration as the values of peak discharges are very dependent on them. On this poster, the
comparison of different procedures is provided including the analysis on the uncertainty of
the results.
Acknowledgement
The research presented in this contribution has been carried out within the research
projects COST LD11031 “Flood Characteristics of Small Catchments”, NAZV QI102265
“Assessment of soil erosion and phosphorus loads causing eutrophication of stagnant water
bodies” and NAZV KUS QJ1220233 “Assessment of former pond systems with aim to achieve
sustainable management of water and soil resources in the Czech Republic”. All the support
is highly acknowledged. |
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