Environmental Engineering Reference
In-Depth Information
next step, the calibration and modeling approaches for flood hazard assessment,
the basic theory for hydraulic and hydrologic models (HEC-RAS and SOBEK),
were described. Both models generate output data such as water depth, velocity,
and inundation in the form of map-series, and the rationale behind these maps was
also explained in this chapter. Continuing on, the designed scenarios and fre-
quency analysis and the aims behind them were described, which is necessary for
any future flood management in the case study. In the next part, the trend testing
approaches for hydrometeorological variables such as precipitation, temperature,
and stream flow were formulated for the time series of 1961-2009. The trend
analysis of hydrological and meteorological series is important and even more
relevant when considering the regional effects of global climate change. Trend
analysis provides an idea about climatic variability in the watershed. Kendall's
method, as a strong method, which is suggested by many investigators, introduced
to check the significance of trends in hydroclimatological parameters. Finally, the
process for preparing and digitizing the land use maps based on available aerial
photos was described shortly. The statistical analysis was applied to compare the
changes from the past until the present. The next chapter provides a background on
the study area and characteristic of Ubaye River.
References
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