Prioritizing sub-watersheds flooding intensity for structural Damaging Flood control and managing Journal Article

Writer: Daliri، F ؛ Seraji، H.S ؛ Kholghi، M ؛ Dehghanipour، A.H ؛

DESERT Autumn 2013, Volume 18 - Number 2 Ranking Science-Research (Ministry of Science (‎10 page(s) - From 153 to 162 )

Keywords: DSM Damaging Flood Utility Function

Abstract:

Nowadays multicriteria decision making (MCDM) methods are a useful tool for investigating natural resources and to address problems related to hydro systems. The goal of this research was to assess the Daliri Standardization Method (DSM) to prioritize and make selections for application to MCDM. And to compare the DSM method with the Utility Additive (UTA) method. The (DSM) method, unlike the (UTA) method, lines up choices without incorporating a decision-maker. Moreover, by conditioned weights, linear or exponential functions, the choices partial additive function is formulated in the Lingo program and finally, the total additive function is used to make priorities among the choices. In this study, 47 sub-watersheds in eastern Khurasan province were evaluated according to 25-year return periods for flood, lag time and fatal-cost damage. Results of the (DSM) method were accompanied by all multi-component goals in subbasins based on real data. The utility function of each method was compared with data relating to the Kan river northwest of Tehran, and comparison showed that 80 percent of the results were the same, so the DSM method can be considered as more logical and sensible than the UTA method. This evaluation was made without consideration of site variation, so it can be used effectively in watershed flood management to prevent investment in low priority sub-basins.

Machine summary:

The main objective of this research was to evaluate ability of the DSM to prioritize sub- basins according to mathematical logic for each watershed operation and construct a model for flood control on a low budget. This flexibility is the most suitable for the decision-making process for problems relating to natural resources, as such it presents a suitable method for prioritizing watersheds of the sub-basins located in the north of Neyshabour region and Kan River in Tehran. Regarding 3 criteria as A, B, C, according to Table 1 for each choice, figures subject to partial and overall value functions, based on (1) to (5), calculations were made by the DSM for equal weight of specific flood and more lag time and weight of damage standard (50%) for prioritization of flood of units in the region north of Neyshabour. Weighting coefficient in the UTA method and the Kan region located in the North West of Tehran consisted of equal weights for lag time criteria and specific flood and more weight for damage was determined and the Kan River sub-basins were prioritized. In this method, regarding priority in weighting coefficient (here more weight for damage), if amounts of damage in these two rivers were equal, then their rating would be determined by comparing the minor values of other criteria (here as lag time and specific flood) in linear form. Prioritized results for the Kan River 19 sub-basin flood intensity are presented in Table 4 by the UTA and DSM methods.

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