Multistage Models for Flood Control by Gated Spillway: Application to Karkheh Dam

Abstract

The paper demonstrates a simulation optimization framework for enhancing the real-time flood control with gated spillways at places where no flood forecasting data are available. A multiobjective modeling scheme is presented for the flood management in a gated spillway in which the operator may specify the priorities on floods based on their different return periods. Two different operation strategies were devised. Both operating strategies employ ten-stage policies, which rely on the reservoir water level as the input data. The second strategy benefits from both the observed reservoir water level and the flood peak. The optimal values of the models’ parameters were obtained using a genetic algorithm. This is a novel approach because none of its policies needs flood forecasting data, thus, making them adaptable to any flood with any return period. To evaluate the performances of the proposed models, the flood control through a gated spillway of the Karkheh reservoir was considered, where flood hydrographs with different return periods were routed through the reservoir.

Using multi‐criteria decision‐making methods in prioritizing structural flood control solutions: A case study from Iran

“…For example, the study by (Sajedi Hosseini et al, 2021) examines the impact of dam construction on flood attenuation in the Karkheh River basin, Iran, highlighting the ability of the dam to store excess water during flood events. However, reservoir operation strategies are crucial in optimizing flood control measures (Salehi et al, 2022;Su et al, 2022;Yu et al, 2023). Furthermore, the benefits and drawbacks of dams and retention basins in flood control should be analyzed.…”

Investigation on the micro-structure and mesoscale transport behavior in the steel cord-rubber composites with lattice Boltzmann methodology

“…Additionally, the roulette-wheel selection method is employed to select generations in the reproduction process of the genetic algorithm. In this method, the probability of selecting a string or chromosome is proportional to its fitness (Salehi et al, 2022). The genetic algorithm starts the search using an initial set of random solutions, and it can perform multiple searches and iterations over a population of variables, increasing the likelihood of finding a global optimal solution.…”

Assessment of the Trust Crisis between Upstream and Downstream States of the Helmand River Basin (1973–2022): A Half-Century of Optimism or Cynicism?

“…Thus, in the absence of irrigation canals, the water continues to flow to Iran without restriction. 70 In addition, the Islamic Emirate of Afghanistan under the Taliban's administration recently released water from the Helmand River to the Sistan-Baluchistan region after water in the Kamal Khan reservoir reached its maximum level. 71 Hence, despite the existence of an international water treaty for the Helmand River, the basin continues to suffer from water disputes between the upstream and downstream riparian states 40,45,64,66 as a result of the adverse impacts of climate changes (p 2) 68 and water scarcity due to an increase in population and agricultural activity.…”

“…While the dam was inaugurated on March 24, 2021, 14,69 the Hamoun Helmand was already desiccated by 2000 (p 356). 68 Also, Jain 30 and Salehi 70 concluded that despite the inauguration of Kamal Khan Dam, farmers in Nimroz province, the province in which Kamal Khan Dam is located, still face a water crisis as the Afghan government has not yet constructed the related irrigation canals. Thus, in the absence of irrigation canals, the water continues to flow to Iran without restriction.…”