The effect of geologic units on water quality of Bazeh- Hour watershed, with emphasis on sedimenotology studies, SE Mashhad
Subject Areas :MehdiReza Poorsoltani 1 , Sifollah Alami 2
1 - دانشیار گروه زمین شناسی، دانشگاه آزاد اسلامی واحد مشهد
2 - دانش آموخته کارشناسی ارشد، گروه زمین شناسی، دانشگاه آزاد اسلامی واحد شاهرود،
Keywords: Water Quality, sedimentology, facies, Binalud, Bazeh-Hour, structural elements,
Abstract :
Binalud watershed is located, South-East of Mashhad, that geologically, is a part of Binalud zone. Binalud watershed contanis three subbasins, which among them, Bazeh-Hour subbasin has been studied. Climatology, Bazeh-Hour area is arid and semi-arid, and, so, due to the various geological units, the chemical composition and the quality of the water has been changed, so, the type of water is sulfuate and chloride. Additionally, in terms of agriculture and human drinking is also acceptable. Thus sedimentology studies, along Bazeh-Hour river shows that three main factors, sudden changes of slope, entrance of minor channels and seasonal flood events, caused the sediments fabric variation, and parameters changing, such as sorting, skewness and kurtis. So, sedimentology and petrology studies show that the most sediments are very poor sorted, platykurtic and fine skewed, and basic and ultrabasic rocks are the main source of Bazeh-Hour deposits. Although, based on field studies, three facies associations are recognized, that consist four gravely facies, Gmm, Gmg, Gcm and Gci, two sandy facies, Sh and Sl, and three mud facies, Fm, Fr and Fl, and four structural elements, SG, HO, LS and FF are identified. In according to Bazeh-Hour river facies associations and structural elements, three depositional models, gravely bradied rivers with gravity flows, sandy meandering river and fining grain meandering river are suggested.
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