Zainudini MZ* and Sardarzaei A
Floods are among the most devastating natural hazards in the world. Iran and specially Makoran has big rivers and flood planning and management is mainly concentrated on riverine floods occurring during seasonal rains. This research investigate on the Lower Sarbaz and Kajo rivers and used discharge analysis of river channel-gauging time series to assess the regional water supplies and agricultural purposes. This analysis reveals that for all flood conditions especially on the lower Sarbaz river, have systematically risen for monthly maximum discharge volumes over the period of record. The Sarbaz and Kajo rivers have served as important routes for transportation and commerce since the formation. These two rivers need to be re-assessed especially in light of the predicted large increase in rainfall and water in the rivers over the next 25 years or so as predicted by the global climate change models. Iran has big rivers and flood planning and management is mainly concentrated on riverine floods occurring during monsoon. However, flash floods in hilly and mountainous areas are also common with demonstrated damage potential. Flood events in arid areas can be extremely damaging with increasing development, particularly in Garmbeet and Bahowkalat area (Down-stream of Pishin Dam). Flood protection and drainage design are considerable importance. Existing flood risk models are inadequate, and predicted changes in the climate show that there may be much more water in the system in the near future. New models are being built to test how the river-floodplain systems will respond to large increases in the discharge in the future.
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