934 resultados para Sewage disposal in the ground


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Thebes (deserted settlement), Egypt; 2 ft. 10 41/64 in.x 3 ft. 3 11/64 in.x 8 21/32 in.; painted plaster

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New dredge-disposal techniques may serve the dual role of aiding sand by-passing across coastal inlets, and beach nourishment, provided the dredged sediments placed seaward of the surf zone move shoreward into that zone. During the summer of 1976, 26,750 cubic meters of relatively coarse sediment was dredged from New River Inlet, North Carolina, moved down coast by a split-hull barge, and placed in a 215-meter coastal reach between the 2- and 4-meter depth contours. Bathymetric changes on the disposal piles and in the adjacent beach and nearshore area were studied for a 13-week period (August to November 1976) to determine the modification of the surrounding beach and nearshore profile, and the net transport direction of the disposal sediment. The sediment piles initially created a local shoal zone with minimum depths of 0.6 meter. Disposal sediment was coarser (Mn = 0.49 millimeter) than the native sand at the disposal site (Mn = 0.14 millimeter) and coarser than the composite mean grain size of the entire profile (Mn = 0.21 millimeter). Shoaling and breaking waves caused rapid erosion of the pile tops and a gradual coalescing of the piles to form a disposal bar located seaward (= 90 meters) of a naturally occurring surf zone bar. As the disposal bar relief was reduced, the disposal bar-associated breaker zone was restricted to low tide times or periods of high wave conditions.

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"Research initiated by the Project Planning and Pollution Control Division, Dept. of County Engineer, County of Los Angeles."

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"Research initiated by the Project Planning and Pollution Control Division, Dept. of County Engineer, County of Los Angeles."

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At head of title: Task 9R99-01-005-06. Contract DA 44-177-TC-726.

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Analyses of the War in Afghanistan frequently mention the declining or shaky domestic support for the conflict in the United States and among several U.S. allies. This paper dates the beginning of this decline back to the resurgence of the Taliban in 2005-06 and suggests that the deteriorating course of the war on the ground in Afghanistan itself along with mounting casualties is the key reason behind this drop in domestic support for the war.

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Title within ornamental border.

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Mode of access: Internet.