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Download Applied Hydrogeology of Fractured Rocks by B.B.S. Singhal †, R.P. Gupta PDF

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By B.B.S. Singhal †, R.P. Gupta

Hydrogeology is a topical and starting to be topic because the earth's water assets develop into scarcer and extra weak. greater than 1/2 the skin sector of continents is roofed with challenging rocks of low permiability.

This ebook offers comprehensively with the elemental rules for knowing the hydrogeological features of rocks, in addition to exploration strategies and overview. It additionally offers intensive dialogue on structural mapping, distant sensing, geophysical exploration, GIS, groundwater circulation modelling and contaminant shipping, box hydraulic checking out together with tracer checks, groundwater caliber, geothermal reservoirs, controlled aquifer recharge, and assets evaluate and management.

Hydrogeological points of varied lithology teams, together with crystalline rocks, volcanic rocks, carbonate rocks and clastic formations were handled individually, utilizing and discussing examples from world wide. will probably be a useful textual content e-book cum reference resource for postgraduate scholars, researchers, exploration scientists and engineers engaged within the box of groundwater improvement in fractured rocks.

Applied Hydrogeology of Fractured Rocks - moment variation is punctiliously revised and prolonged with a brand new bankruptcy, up-to-date sections, many new examples, and elevated and up to date references.

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Extra resources for Applied Hydrogeology of Fractured Rocks

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2 Geomorphological investigations Geomorphological investigations include delineation and mapping of various landforms and drainage characteristics. 1 Hydrogeologic al classification of rocks Rock group Mode of occurrence Rock types Main featur es impo rtant for groundwa ter occurrence Crystalline rocks Non-volcanic igneous and metamorphic rocks, viz. granites, gneisses, schists, slates and phyllites, etc, Large size massifs and plutons; regional metamorphic belts Weath ered horizon, fractures and lineament s Volcan ic rocks Basalts, andesites and rhyolites Lava tlows at places interbedded with sedimentary beds Fractures, vesicles and intertlow sediments Carbonate rocks Limestones and dolomites Mostly as chemical precipitates with varying admixtures of clastics in a layered sedimentary sequence Fractures and solution cavities Clastic rocks Consolidated: sandstones and shales; unconsolidated: gravel, sand, clay etc.

For example, high dra inage density removes surface run-oft rap idly, decreasing lag time and increa sing the peak of the hydrograph. Among other drain age netwo rk parameters, bifurcation ratio, stream frequency and 40 basin shape are also of hydrological interest. Read ers may refer to Strahl er (1964), Gregory and Wallin g (1973) and other texts. 3 Hydrogeological investigations Th ese include groundwater level measurements, estimation of hydraulic properties of aquifers and assessment of groundwater quality.

23b). As an example, it is shown in the figure that most of the joints in Bundelkhand granites (BG) are of the connected type. 10. Rock q uality designation (ROD) RQD is a semi-quantative measure of fracture density which can be estimated from core recovery data. RQD is defined as the ratio of the recovered core more than 4 in. (about 10 cm) long and of good quality to the total drilled length and is expressed as a percentage. r--B { B ~B / ~ B_ 0,. 23 Fracture connectivity. (a) Different types of fracture terminations: B = blind; C = crossing; D = diffusely connected.

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