شناسایی درجه کارستی شدن حوضه کوهستانی کلات در شمال شرق ایران

شناخت ‌درجه کارستی شدن یک حوضه کارستی اهمیت زیادی از نظر مدیریت منابع آب و گردشگری در یک منطقه دارد. هدف از این پژوهش شناسایی درجه کارستی شدن حوضه کارستی کلات می باشد. کارستهای حوضه کلات از نوع کارستهای جوان تا نیمه تکاملی می باشد. روش و تکنیک کار از نوع تجربی ، میدانی و تحلیل سلسله مراتبی می باشد. نتایج تحقیق نشان داد با استفاده از شواهد میدانی ، تنوع لندفرمها نسبتا کم ، ‌نهشته های غاری وجود ندارد ،غارها توسعه یافته نیستند.در مراحل تکامل کارست با استفاده از روش والتهام و فوکس، حوضه در مرحله جوانی قرار دارد. با استفاده از روش سویجیک کارست در مرحله انتقالی قرار دارد . با استفاده از معادله تجربی کوربل، فرسایش کارستی عدد 23.66 میلیمتر در هزار سال و با روش سوئیتینگ فرسایش کارستی عدد 12.92 میلی متر در هزار سال را نشان می دهد که وضعیت نیمه تکاملی کارست را نشان می دهد.با استفاده از تکنیکهای آزمایشگاهی کلسیمتری، icp و بررسی وزنی میزان درصد آهک در سازندهای کربناته به ترتیب 36.3 درصد ،38 درصد و 39.3 درصد به دست آمد که نشان از خلوص نسبتا پایین آهک در سازندهای کربناته حوضه می باشد که نشان دهنده درجه تکامل کارست به سمت جوانی می باشد . در نهایت با استفاده از مدل تحلیل سلسله مراتبی، از کل مساحت حوضه کلات 19.04 درصد در طبقه کمتر توسعه یافته ، 24.57 درصد در طبقه توسعه نیافته ،‌ 42.88 درصد در طبقه متوسط و 14.38 درصد در طبقه توسعه یافته قرار گرفته است که با توجه به وسعت پایین مناطق توسعه یافته کارست حوضه ، مرحله جوانی را نشان می دهد .

Identification of the Karsticity of the Kalat Mountain Basin in the North East of Iran

Extended abstractIdentification of the Karsticity of the Kalat Mountain Basin in the North East of IranIntroductionKarst is a geomorphic and hydrological system formed by dissolved gems such as limestone, dolomite and gypsum (Oziert et al., 2014).In this study, considering the foreign and domestic studies, and considering the role of Paleoclima and the high difference of the ancient climate of this region with presentday climate in the degree of karst karsticity in the region, the degree of karstification of the basin with field, experimental and The hierarchical analysis model was developed.The study area is Kalat Mountain basin in Kopeh Dagh zone, located in the highlands of the thousand mosques and northeastern parts of the country. This basin has an area of 168.37 km2 located 145 km north of Mashhad and in Khorasan Razavi province.Matherials and Methods Techniques used in this research include field, empirical, and hierarchical techniques .1. techniques fieldA. Classification of Karstic forms of basin based on the method of CvijicB) Division of karstic forms based on Waltham and Fox methodsC) Evidence of Karst geomorphology of Kalat mountain basin 2) Experimental formulas of karstA) Corbel equationX=4ET/100B)The switching equation X=FQTN/( 3) Laboratory techniques to investigate the dissolution of basin karst A. Measurement of lime in sediment by calcicometric (volumetric) method with Bernard calcium B) ICP method (analytical inductive coupled plasma)C) Weighting method4) Analytical Hierarchy Model Results and Discussion To identify the degree of karstification of the basin with field evidence, empirical and hierarchical analysis model, the following are cited separately:1. You want to know: Field evidence includes Cvijic methods, Waltham, and geomorphologic evidence. The following is a summary of the field evidence:Based on this categorization, the Kalat basin karsts are placed in the row of transition karsts. Because in this basin, the dimensions of the caves are small and not very large. Poles, also known as karst areas, are not formed in this basin, and because of their slopes and inappropriate topography they are not likely to be formed in the future. Devils do not have much to gain in the basin. Other forms of karstis also have not evolved. According to this division, basin karsts are placed on the young karst ranksIn the studied basin, the diversity of landforms is low due to field visits to the basin, and it lacks any cave deposits, and the cave does not really exist in it, and the karst hydrogeology is not much developed. These reasons make the study of the studied basin more youthful to semievolutionary.2) Experimental formulas of karstA) Result of Corbel equationAccording to calculations, the number is obtained 23.66 mm per thousand yearsB) Result of The switching equationAccording to calculations, the number is obtained 12.92 mm per thousand years .3) Result of Laboratory techniques to investigate the dissolution of basin karstA. Result of Measurement of lime in sediment by calcicometric (volumetric) method with Bernard calcium . According to calculations, the number is obtained 36.3B) Result of ICP method (analytical inductive coupled plasma): In order to perform the experiment, four rock samples were taken from four important limestone formations of the basin of the ICP technique and analyzed in the laboratory and the results are as follows:Table 4: Calcium (Ca) element content in Kalat Mountain basin divided by four formations per%Type of formationCalcium content in%Tirgan38.90Mozduran 238.34Sarcheshmeh38.41Shurijeh.7C) Result of Weighting methodAccording to this experiment, 4 samples of Tirgan, Mozduran 2, Kalat and Sarcheshmeh showed 4/3% of the total amount of lime in the sedimentology laboratory. 4) Result of Analytical Hierarchy ModelThe basis of this model is the comparison of the parameters of the parameters and ultimately the zoning of the karstic transformation. Considering the role of the various factors and the development of the karsts of the region in the past, and considering the different paleoclima of the past region with the current situation and the role of the various factors in the development of eight layer karst Information was selected. Based on field studies and the opinion of experts and consultants in the doctorchr('39')s thesis, the lithology factor was chosen as an important parameter in the development of the karst. After that, the distance from the fault was selected considering its important role in the development of the gap and gap. The climate and then the elevation are factors that have been selected as the important and influential factor on rainfall, evapotranspiration and temperature in this study. Subsequently, layers, slope, distance from the waterway were selected for slope and land use. Different layers of information have been categorized into standard layout and field visits by applying expert judgment and assigning weight to each stratum.