بررسی تکتونیک فعال حوضه آبریز دالکی با استفاده از شاخص های ژئومورفیک و شواهد ژئومورفولوژیکی

اﻧﺪازهﮔﯿﺮیﻫﺎی ﮐﻤﯽ ﺑﻪ ژﺋﻮﻣﻮرﻓﻮﻟﻮژﯾﺴﺖﻫﺎ اﺟﺎزه ﻣﯽدﻫﺪ ﺗﺎ ﺑﻪ ﻃﻮر واﻗﻌﯽ و ﻣﻌﻘﻮل ﻟﻨﺪﻓﺮم ﻫﺎی ﻣﺨﺘﻠﻒ را ﺑﺎ ﯾﮑﺪﯾﮕﺮ ﻣﻘﺎﯾﺴﻪ ﮐﺮده و ﺷﺎﺧﺺﻫﺎی ﻣﻮرﻓﻮﻟﻮژﯾﮏ را ﻣﺤﺎﺳﺒﻪ ﮐﻨﻨﺪ. اﯾﻦ اﻣﺮ در ﺗﺸﺨﯿﺺ و ﺗﻮﺻﯿﻒ ﺧﺎص ﻧﺎﺣﯿﻪ ای ﺑﻪ ﻋﻨﻮان ﻣﺜﺎل ﻣﯿﺰان ﻓﻌﺎﻟﯿﺖ ﺗﮑﺘﻮﻧﯿﮑﯽ ﻣﻔﯿﺪ ﻣﯽﺑﺎﺷﺪ. رودﺧﺎﻧﻪﻫﺎ و ﺷﺒﮑﻪ زﻫﮑﺸﯽ از ﺟﻤﻠﻪ ﻣﻬﻢ ﺗﺮﯾﻦ ﻋﻮارﺿﯽ ﻫﺴﺘﻨﺪ ﮐﻪ ﻧﺴﺒﺖ ﺑﻪ ﺗﻐﯿﯿﺮات ﺗﮑﺘﻮﻧﯿﮑﯽ ﺑﺴﯿﺎر ﺣﺴﺎس ﻣﯽﺑﺎﺷﻨﺪ. ﻫﺪف از اﯾﻦ ﭘﮋوﻫﺶ ﺑﺮرﺳﯽ ﺗﮑﺘﻮﻧﯿﮏ ﻓﻌﺎل ﺣﻮﺿﻪ آﺑﺮﯾﺰ داﻟﮑﯽ ﺑﺎ اﺳﺘﻔﺎده از ﺷﺎﺧﺺﻫﺎی ژﺋﻮﻣﻮرﻓﯿﮏ ﻣﯽﺑﺎﺷﺪ. ﺑﺪﯾﻦ ﻣﻨﻈﻮر ﺑﺎ ﺑﺮرﺳﯽ ﻣﻄﺎﻟﻌﺎت ﭘﯿﺸﯿﻦ از ﺷﺶ ﺷﺎﺧﺺ ﻧﺴﺒﺖ ﺷﮑﻞ ﺣﻮﺿﻪ زﻫﮑﺸﯽ bs ، اﻧﺘﮕﺮال ﻫﯿﭙﺴﻮﻣﺘﺮی hi ، ﺗﻘﺎرن ﺗﻮﭘﻮﮔﺮاﻓﯽ ﻋﺮﺿﯽ t ، ﻓﺮازﻧﻤﺎi ، ﺷﺎﺧﺺ ﺗﺮاﮐﻢ زﻫﮑﺸ ﯽ d وﮔﺮادﯾ ﺎن ﻃ ﻮل رودﺧﺎﻧﻪ sl ﮐﻪ ﺑﯿﺸﺘﺮ ﮐﺎرﺑﺮد داﺷﺘﻪ اﺳﺖ، اﺳﺘﻔﺎده ﺷﺪه اﺳﺖ. ﺑﻪ اﯾﻦ ﻣﻨﻈﻮر ، اﺑﺘﺪا ﻻﯾﻪﻫﺎی اﻃﻼﻋﺎ ﺗﯽ ﻧﻘﺸﻪ ﻫﺎی ﺗﻮﭘﻮﮔﺮاﻓ ﯽ 1:25000 ﺑﻪ ﺳﯿﺴﺘﻢ اﻃﻼﻋﺎﺗﯽ gisدر ﻣﺤﯿﻂ gis 10.2 اﻧﺘﻘﺎل داده ﺷﺪه و ﺑﺎ اﺳﺘﻔﺎده از آن ﻻﯾﻪ ﻫﺎﯾﯽ ﻣﺎﻧﻨﺪ ﺷﺒﮑﻪ زﻫﮑﺸﯽ، ﺷﯿﺐ، ﻣﺪل رﻗﻮﻣﯽارﺗﻔﺎع و tin اﺳﺘﺨﺮاج ﮔﺮدﯾﺪ و ﺑﺎ اﺳﺘﻔﺎده از ﻧﻘﺸﻪ زﻣﯿﻦﺷﻨﺎﺳﯽ ﻣﻨﻄﻘﻪ، ﻻﯾﻪﻫﺎی ﺧﻄﯽ ﮔﺴﻞﻫﺎ و ﺳﺎزﻧﺪﻫﺎی ﺗﺸﮑﯿﻞ دﻫﻨﺪه ﺑﺴﺘﺮ رودﺧﺎﻧﻪ ﻣﻮرد ﻣﻄﺎﻟﻌﻪ اﺳﺘﺨﺮاج و ﺑﻪ ﻻﯾﻪ ﻫﺎی ﻓﻮق اﺿﺎﻓﻪ ﮔﺮدﯾﺪ. ﭘﺲ از ﻣﺤﺎﺳﺒﻪ ﺷﺎﺧﺺ ﻫﺎ ی ژﺋﻮﻣﺮﻓﯿﮏ در ﻣﻨﻄﻘﻪ و ﺑﺮآورد ﺷﺎﺧﺺ iat ﻣﯿﺰان ﻧﺴﺒﯽ ﺗﮑﺘﻮﻧﯿﮏ ﻓﻌﺎل در زﯾﺮﺣﻮﺿﻪﻫﺎی ﻣﻮرد ﻣﻄﺎﻟﻌﻪ ﻣﺸﺨﺺ ﺷﺪ . ﻧﺘﺎﯾﺞ ﺗﺤﻘﯿﻖ ﻧﺸﺎن ﻣﯽدﻫﺪ ارﻗﺎم ﺣﺎﺻﻞ از ﺑﮑﺎرﮔﯿﺮی ﺷﺎﺧﺺ ﻫﺎی ﻣﺨﺘﻠﻒ ﻧﯿﺰ ﻧﺸﺎن دﻫﻨﺪه ﻓﻌﺎل ﺑﻮدن ﺗﮑﺘﻮﻧﯿﮏ در ﺑﺨﺶ ﻫﺎی ﻣﺨﺘﻠﻒ ﺣﻮﺿﻪ، ﺑﻮﯾﮋه در ﺑﺨﺶﻫﺎی ﺷﻤﺎﻟﯽ وﺟﻨﻮﺑﯽ آن اﺳﺖ.

Investigation of active tectonics of Dalaki catchment using geomorphic indices and geomorphological evidences

Quantitative measurements allow geomorphologists to compare genuinely and reasonably different landforms and compute morphological indices. This is useful in regionally identifying and describing, for example, tectonic activity. Rivers and drainage networks are one of the most important complications that are very sensitive to tectonic variations. The purpose of this study is to investigate the active tectonics of the Dalaki catchment area using geomorphic indices. In this baseline, six indicators of Bs drainage basin, Hyssometric integral Hi, T transverse Taxis symmetry, Ifactor, Ddrainage index, and SLLagardian length are used. In the study of the relationship between tectonics and morphometry in the studied basin, topographic, geological, topographic maps, geology, meteorology, hydrology, satellite imagery from trustees were prepared and after necessary processing for the research purposes Has been used. The results of the study show that the shape of the semiarid and semisymmetrical topographic symmetry is high, but the disturbances in the longitudinal profile of the river are high due to different lithology units and numerous fault structures. According to the survey on accurate data, the displacements that caused the fault are only visible on the Gurpi Formation. In this way, the aggregate data and ground evidence in the aquifer basin is semiactive in terms of the dynamics of the internal forces of the earth.