Iranian Journal of Remote Sensing & GIS

The Comparison of Resilience and Resistance Approaches in Flood Risk Management (Case Study of Qezel Ozan River in Mahneshan Basin)

M Zakipour; M Taleai; Gh Javadi

Volume 10, Issue 1 , June 2018, , Pages 41-56

Abstract

Flood is one of the most common and destructive natural events in the world. Conventional methods which aim to prevent floods, mostly are based on resistance approaches. Considering uncertainties about time and location of flood occurrence and design variables such as discharge, structure resistance ... Read More Flood is one of the most common and destructive natural events in the world. Conventional methods which aim to prevent floods, mostly are based on resistance approaches. Considering uncertainties about time and location of flood occurrence and design variables such as discharge, structure resistance and physical characteristics of a basin, resistance methods are not suitable solutions. However, resistance methods for preventing from the flood are effective on lower discharges, they may become less effective or ineffective in extreme-case emergencies. As an example, levees are only effective when flood waters remain below their design capacity. Therefore, in order to manage and reduce human casualties and financial losses, more suitable solutions based on resilience are introduced. Flood resilience is interpreted as the capacity to tolerate flooding to avoid disaster when undergoing- not preventing- flooding, or when physical damage and socioeconomic disruption still occur, the capacity to reorganize and recover quickly. Recovery is defined as assisting of communities affected by flood waters to achieve a proper and effective level of functioning. Resilience approach in water resources management plays an important role in flood risk management. In this study, several strategies of flood risk management with an emphasis on the concept of resilience have been evaluated. A case study was carried out on the Ghezel Ozan river, located in the Mahneshan basin. In order to model the flood, the data related to the topographic conditions of the river are adapted using the HEC GeoRAS extension in the ArcGIS. Then, the flood characteristics in the 25, 50, and 100-year return periods are estimated by the HEC RAS model. Flood flow modeling has been carried out based on eight different management strategies including resistance and resilience strategies based on structural and non-structural approaches. The comparison of these strategies is based on the values of resilient indicators including the amplitude, graduality and recovery rate. Indicators for the amplitude are the expected annual damage (EAD) and the expected annual number of casualties (EANC). The graduality is measured by comparing the relative increase of discharge in a river by the corresponding relative increase of damage. Recovery rate is a function of social, economic and physical condition. In this research, in order to quantify the recovery rate, it is presented as a function of evaporation, transpiration and water penetration into the soil. Finally, after calculating the resilience indicators for each scenario, in order to prioritize the scenarios, the entropy method is used for weighting and TOPSIS is utilized to prioritize the scenarios. According to the results, it has been observed that resilience based methods are preferred to resistance methods and dry farming with flood warning and flood insurance has been determined as the best strategy.

Prediction of Tehran Air Pollution Using PCA-ANFIS Method

Z Ghaemi; M Taleai; M Farnaghi; G Javadi

Volume 9, Issue 3 , February 2018, , Pages 45-70

Abstract

Urban growth and increased use of vehicles have led to an increase in air pollution, especially in large and industrialized cities in recent years. Because of the adverse effect of air pollution on human and other creatures, prediction and modeling of this complex phenomenon have the main concern of ... Read More

Power Transmission Line Routing Using NSGA-II Algorithm

Volume 6, Issue 4 , October 2014

Abstract

Using new approaches to optimize the process of power transmission line routing can solve many complex problems which power transmission line routing decision-makers are faced. Due to the expansion of involved parameters we can consider multi-objective evolutionary algorithms as appropriate method in ... Read More

Due to the rapid population growth and urban development which results in limited arable land, land evaluation for selecting optimum utilization of land and increase in production per unit area as well as purposeful decisions in allocation of agricultural

Volume 6, Issue 1 , April 2014

Abstract

Due to the rapid population growth and urban development which results in limited arable land, land evaluation for selecting optimum utilization of land and increase in production per unit area as well as purposeful decisions in allocation of agricultural land to the best land use type is very important. ... Read More

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Author = Taleai, M

The Comparison of Resilience and Resistance Approaches in Flood Risk Management (Case Study of Qezel Ozan River in Mahneshan Basin)

Abstract

Prediction of Tehran Air Pollution Using PCA-ANFIS Method

Abstract

Power Transmission Line Routing Using NSGA-II Algorithm

Abstract

Due to the rapid population growth and urban development which results in limited arable land, land evaluation for selecting optimum utilization of land and increase in production per unit area as well as purposeful decisions in allocation of agricultural

Abstract