An unconfined aquifer is located between two fully penetrating rivers and has a hydraulic conductivity of K = 8.14 m/d. The water surface elevations in rivers A and B are 13.5 m and 16.9 m, respectively, above the bottom. Calculate the total head at a point located 100m from river A? River B River A V h 16.9m 13.5m Datum level 270m 100m

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Asphalt Binders and Mixtures

Asphalt binders are subsidiary products procured during the refining process of petroleum while manufacturing gasoline, diesel, and similar petroleum products. Asphalt binders are obtained from the residue that remains after the distillation of petroleum, this residue is further subjected to steam distillation and oxidation to remove the traces of gas oil present in the residue. Certain additives or modifiers are also added to asphalt binders to alter them to suit different applications.