شبيه‌سازي جريان غيرماندگار دركانال‌هاي آبياري با استفاده از مدل CanalMan (مطالعه موردي كانال AMC شبكه آبياري دشت تبريز)

Simulation of Unsteady Flow in Irrigation Canals Using CanalMan Model (Case Study: AMC Canal of Tabriz Plain Irrigation Network

در اﯾﻦ ﺗﺤﻘﯿﻖ ﺑﺎ ﮐﺎرﺑﺮد ﻣﺪل CanalMan ، ﺟﺮﯾﺎن ﻏﯿﺮﻣﺎﻧﺪﮔﺎر در ﮐﺎﻧﺎل AMC ﺷﺒﮑﻪ آﺑﯿﺎري دﺷﺖ ﺗﺒﺮﯾﺰ ﺷﺒﯿﻪﺳﺎزي ﺷﺪه اﺳﺖ. ﻫﺪف ﺗﺤﻘﯿﻖ، ارزﯾﺎﺑﯽ ﺣﺎﻟﺖﻫﺎي ﻣﺨﺘﻠﻒ ﺑﺎزﺷﺪﮔﯽ ﺳﺎزهﻫﺎي ﮐﻨﺘﺮل و آﺑﮕﯿﺮ ﮐﺎﻧﺎل در ﮔﺬر از ﻣﺎه ﺑﺎ ﻧﯿﺎز آﺑﯽ ﮐﻢ ﺑﻪ زﯾﺎد و اﻧﺘﺨﺎب ﻣﻨﺎﺳﺐﺗﺮﯾﻦ ﺑﺮﻧﺎﻣﻪ ﺑﻬﺮهﺑﺮداري در ﺑﯿﻦ ﮔﺰﯾﻨﻪﻫﺎي در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪه ﻣﯽﺑﺎﺷﺪ. ﺑﺮاي اﯾﻦ ﻣﻨﻈﻮر 10 ﮔﺰﯾﻨﻪ ﺑﻬﺮهﺑﺮداري ﺑﺮاي ﺣﺎﻟﺖ اﻓﺰاﯾﺶ دﺑﯽ ورودي ﮐﺎﻧﺎل در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪ و در ﺗﺤﻮﯾﻞ 10 ﺳﺎﻋﺘﻪ آب ﻣﻮرد ﻣﻘﺎﯾﺴﻪ ﻗﺮار ﮔﺮﻓﺖ. ﻣﻌﯿﺎرﻫﺎي ﻣﻘﺎﯾﺴﻪ ﮔﺰﯾﻨﻪﻫﺎي ﻣﺨﺘﻠﻒ ﻋﺒﺎرت از ﻣﯿﺰان ﮐﻤﺒﻮد آب ﺗﺤﻮﯾﻠﯽ، ﻗﺪرﻣﻄﻠﻖ ﺧﻄﺎي دﺑﯽ آﺑﮕﯿﺮﻫﺎ و ﻣﺘﻮﺳﻂ ﺟﺬر ﻣﯿﺎﻧﮕﯿﻦ ﻣﺮﺑﻌﺎت ﺧﻄﺎ ﺑﻮدﻧﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ ﮔﺰﯾﻨﻪ دﻫﻢ ﺑﺎ ﮐﻤﺘﺮﯾﻦ ﻣﻘﺎدﯾﺮ در ﻫﺮ ﺳﻪ ﻣﻌﯿﺎر، ﺑﻬﺘﺮﯾﻦ ﮔﺰﯾﻨﻪ ﻣﯽﺑﺎﺷﺪ. ﺗﻐﯿﯿﺮات دﺑﯽ ﻧﺴﺒﺖ ﺑﻪ زﻣﺎن ﺑﺮاي ﺳﺎزهﻫﺎي ﮐﻨﺘﺮل و آﺑﮕﯿﺮﻫﺎ در ﮔﺰﯾﻨﻪ دﻫﻢ اراﺋﻪ ﺷﺪه اﺳﺖ. ﺑﺮ اﺳﺎس ﻧﺘﺎﯾﺞ ﺑﻪدﺳﺖ آﻣﺪه زﻣﺎن رﺳﯿﺪن اﻏﺘﺸﺎش ﺑﻪ ﻣﺤﻞ ﺳﺎزهﻫﺎي ﮐﻨﺘﺮل و زﻣﺎن ﻣﺤﻮ ﺷﺪن آن ﺑﺮاي ﮔﺰﯾﻨﻪ ﺑﺮﮔﺰﯾﺪه، ﮐﻤﺘﺮ از ﺑﻘﯿﻪ ﮔﺰﯾﻨﻪﻫﺎ ﻣﯽ-ﺑﺎﺷﺪ.

In this study the unsteady flow in AMC canal of irrigation network of Tabriz plain was simulated using CanalMan model. The aim was to evaluate different settings of canal control structures and turnout in passing from months with low to high water requirements and choose the most appropriate operational program among the considered options. For this purpose 10 operational options for an increasing discharge rate were considered and compared with each other for a 10-hour water delivery duration. The criteria for comparing different options included shortage of water delivery, absolute rate error of discharges and the average root-mean-square of error. The results showed that the tenth option with the least values in all three criteria, was the best option. The temporal changes of discharges for control structures and turnouts in the tenth option were presented. According to the results the disturbance travel time from canal inlet to the control structure and its damping time periods were the least in the chosen option.