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Applied Hydrology
- Biswajit Mukhopadhyay, Vijay P. Singh
- Coming soon
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- Expected online publication date:
- July 2024
- Print publication:
- 31 July 2024
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This comprehensive textbook combines the theoretical principles of engineering hydrology together with their practical applications, using modern industry-standard software. The textbook is written by the combination of a practitioner of water resources engineering with over 30 years of professional experience and a highly respected academic and recognized world authority in hydrology. Examples are drawn from global case studies, with exercises available online. The book begins with a review of the necessary mathematics and statistical hydrology. The underlying principles of the geographic information systems are discussed. In addition to topics covering fundamental concepts, separate chapters are devoted to reservoir operations, water resources management, climate change, and various methods of optimizing hydrologic models for calibration and validation. This textbook will prove to be indispensable for advanced students in civil, environmental, and agricultural engineering, preparing them to confidently join the industrial sector. It will also be an indispensable reference textbook for practicing engineers, bringing them up to date with modern techniques in applied hydrology.
Transitional granulite-eclogite facies metamorphism of basic supracrustal rocks in a shear zone complex in the Precambrian shield of south India
- Biswajit Mukhopadhyay, Mihir K. Bose
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- Journal:
- Mineralogical Magazine / Volume 58 / Issue 390 / March 1994
- Published online by Cambridge University Press:
- 05 July 2018, pp. 97-118
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The phase petrology of two bodies of basic granulites occurring in association with supracrustal sequences within a dextral oblique-slip shear complex in the high-grade terrain of south India, have been studied. Some metabasites are characterized by garnet + clinopyroxene assemblages such as Grt + Cpx + PI ± Hbl ± Opx ± Qtz + Fe-Ti oxide(s) which are high-pressure granulites (garnet-clinopyroxene subfacies) transitional between the intermediate-pressure granulites (orthopyroxene-plagioclase subfacies) and eclogite. Mineralogical characteristics suggest that metamorphic conditions did not reach the eclogite facies but certainly approached that level. Close spatial association of the garnetiferous varieties with garnet-free assemblages (Opx + Hbl + Pl ± Cpx) and intimate juxtaposition of anhydrous and hydrous assemblages indicate a complex interplay of variable μH2O and bulk composition, especially αSiO2. Due to variable and low closure temperature of Fe-Mg exchange reactions between coexisting pyroxene and garnet, reliable estimation of peak temperatures during this near eclogite-facies metamorphism is problematic. A combination of a garnet-clinopyroxene barometer and various temperature estimates suggests P-T conditions of 875 ± 25°C and 8 ± 1 kbar for the Mettuppalaiyam samples and 900 ± 50°C and 14 ± 2 kbar for the Kanjamalai samples. Bulk rock chemical differences in terms of SiO2-content can account for the development of similar mineral assemblages along a near adiabatic metamorphic gradient between these two localities. These assemblages represent some of the highest grade granulite facies rocks in south India. The high-pressure granulites are not in situ samples of ancient lower continental crust, but low-pressure protoliths buried at depth. Textural features suggest that the high-pressure garnet-clinopyroxene subfacies rocks evolved from an amphibolitic assemblage by formation of garnet at the expense of hornblende and plagioclase and this high-pressure assemblage underwent an isothermal decompression indicating a clockwise P-T-t path resulting from crustal thickening and exhumation. A later isobaric cooling, possibly accompanying shearing and high H2O influx (aH2O≈0.78) gave rise to the coexisting orthopyroxeneplagioclase subfacies rocks (intermediate pressure granulites).